Method and apparatus for depositing moisture-absorbent and thermoplastic material in a substrate
First Claim
1. Apparatus for forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
- a forming chamber having an interior;
pad support means for supporting said non-woven pad, said pad support means being movable in a first direction within said interior of said forming chamber;
means for introducing fibrous material into said interior of said forming chamber;
vacuum means for applying a vacuum to draw said fibrous material onto said pad support means, said fibrous material forming said non-woven pad on said pad support means which increases in thickness in said first direction of movement of said pad support means;
first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said pad support means at a predetermined location within said forming chamber;
second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said forming chamber for intermixing with said first material and said fibrous material being drawn onto said pad support means at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for forming a non-woven pad of fibrous material is provided in which highly moisture-absorbent particles and fibers of thermoplastic material are intermixed with the fibrous material throughout one or more predetermined portions of the thickness of the non-woven pad while maintaining other portions of the thickness of the pad substantially free of highly moisture-absorbent particles and/or thermoplastic fiber material. The non-woven pad is formed on one side of a conveyor moving through a forming chamber which has a duct connected to a source of vacuum operable to draw fibrous material injected into the chamber onto the conveyor. One dispenser discharges the highly moisture-absorbent material at a predetermined location relative to the fibrous material being drawn onto the conveyor, and at least one other dispenser discharges the thermoplastic fiber material into the chamber at a location to intermix the thermoplastic fiber material with the fibrous material and highly moisture-absorbent material being drawn onto the conveyor at the predetermined location, and/or to intermix the thermoplastic fiber materials with the fibrous material in areas of the thickness of the non-woven pad on one or both sides of the highly moisture-absorbent material.
82 Citations
78 Claims
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1. Apparatus for forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a forming chamber having an interior; pad support means for supporting said non-woven pad, said pad support means being movable in a first direction within said interior of said forming chamber; means for introducing fibrous material into said interior of said forming chamber; vacuum means for applying a vacuum to draw said fibrous material onto said pad support means, said fibrous material forming said non-woven pad on said pad support means which increases in thickness in said first direction of movement of said pad support means; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said pad support means at a predetermined location within said forming chamber; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said forming chamber for intermixing with said first material and said fibrous material being drawn onto said pad support means at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (2)
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3. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a forming chamber having an interior; pad support means for supporting said non-woven pad, said pad support means being movable in a first direction within said interior of said forming chamber; means for introducing fibrous material into said interior of said forming chamber; vacuum means for applying a vacuum to draw said fibrous material onto said pad support means, said fibrous material forming said non-woven pad on said pad support means which increases in thickness in said first direction of movement of said pad support means; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said pad support means at a predetermined location within said interior of said forming chamber; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said forming chamber for intermixing with said first material and said fibrous material being drawn onto said pad support means at said predetermined location; third dispenser means for intermixing a third material with said fibrous material, first material and thermoplastic fibers being drawn onto said pad support means at said predetermined location to form a layer of intermixed fibrous material, first material, thermoplastic fibers and third material within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material, thermoplastic fibers and third material. - View Dependent Claims (4)
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5. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions of the thickness of said non-woven pad, comprising:
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a forming chamber having an interior; a pad support means for supporting said non-woven pad, said pad support means being movable in a first direction within said interior of said forming chamber; means for introducing fibrous material into said interior of said forming chamber; means for introducing fibrous material into said interior of said forming chamber; vacuum means for applying a vacuum to draw said fibrous material onto said pad support means, said fibrous material forming said non-woven pad on said pad support means which increases in thickness in said first direction of movement of said pad support means; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said pad support means at a predetermined location within said interior of said forming chamber; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said forming chamber for intermixing with said fibrous material being drawn onto said pad support means at a location upstream from said predetermined location; third dispenser means for intermixing said third material with said fibrous material being drawn onto said pad support means at a location downstream from said predetermined location, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and thermoplastic fibers which is drawn onto said pad support means upstream from said predetermined location, a second layer of intermixed fibrous material and said first material which is drawn atop said first layer at said predetermined location, and a third layer of intermixed fibrous material and said third material which is drawn atop said second layer downstream from said predetermined location. - View Dependent Claims (6)
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7. Apparatus for forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said chamber for intermixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (8, 9, 10, 11)
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12. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad at spaced locations therealong, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming said non-woven pad on said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermittently mixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for intermittently dispensing said thermoplastic fibers into said chamber for mixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad at spaced locations therealong while maintaining another portion of said thickness of said non-woven pad at spaced locations therealong substantially free of said first material and said thermoplastic fibers.
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13. Apparatus for forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said forming chamber for intermixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers; means for supplying said thermoplastic fibers to said second dispenser means; control means for controlling the operation of said second dispenser means. - View Dependent Claims (14, 15, 16)
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17. Apparatus for use with a forming chamber having an inlet and an outlet, a conveyor movable between said inlet and said outlet, a vacuum device located on one side of said conveyor for applying a vacuum in said chamber to draw fibrous material introduced into said chamber onto the opposite side of said conveyor forming a non-woven pad on said conveyor which has a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber to said outlet thereof, said apparatus comprising:
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first dispenser means for intermixing moisture-absorbent material with a portion of said fibrous material being drawn into said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; supply means for supplying hot melt adhesive material; second dispenser means connected to said supply means to receive said hot melt adhesive material; control means for causing said second dispenser means to form and dispense hot melt adhesive fibers into said forming chamber for intermixing with said moisture-absorbent material and said fibrous material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, moisture-absorbent material and hot melt adhesive fibers within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said moisture-absorbent material and said hot melt adhesive fibers. - View Dependent Claims (18, 19, 20)
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21. Apparatus for forming a non-woven pad of a fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material in suspension into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said conveyor which has a minimum thickness at said inlet of said chamber and which increases in thickness toward said outlet thereof as more of said fibrous material is drawn onto said conveyor; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location intermediate said inlet and outlet of said chamber; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said chamber for intermixing with said first material and said first material being drawn onto said conveyor at said predetermined location, whereby said non-woven pad is formed with a bottom layer of said fibrous material which is drawn onto said conveyor between said inlet of said chamber and said predetermined location, an intermediate layer of intermixed fibrous material, first material and thermoplastic fibers which is drawn atop said bottom layer of fibrous material at said predetermined location, and a top layer of fibrous material which is drawn onto said intermediate layer between said predetermined location and said outlet of said chamber, said bottom layer and said top layer of said non-woven pad being substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (22, 23, 24)
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25. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said chamber for intermixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location; third dispenser means for intermixing said third material with said fibrous material, first material and said thermoplastic fibers being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material, thermoplastic fibers and third material within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material, thermoplastic fibers and said third material. - View Dependent Claims (26, 27, 28)
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29. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout a selected portions of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing thermoplastic fibers into said chamber for intermixing with said fibrous material being drawn onto said conveyor at a location upstream from said predetermined location; third dispenser means for intermixing said third material with said fibrous material being drawn onto said conveyor at a location downstream from said predetermined location, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and thermoplastic fibers which is drawn onto said conveyor upstream from said predetermined location, a second layer of intermixed fibrous material and said first material which is drawn atop said first layer at said predetermined location, and a third layer of intermixed fibrous material and said third material which is drawn atop said second layer downstream from said predetermined location. - View Dependent Claims (30, 31, 32)
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33. Apparatus for forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing thermoplastic fibers into said chamber for intermixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location; means for positioning a moisture-wicking substance at the exterior surface of said second material in an effective amount so that said exterior surface of said thermoplastic fibers is capable of wicking moisture, whereby a layer of intermixed fibrous material, first material and thermoplastic fibers having a moisture-wicking substance at the exterior surface thereof is formed within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (34, 35, 36, 37, 38)
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39. Apparatus for use with a forming chamber having an inlet and an outlet, a conveyor movable between said inlet and said outlet, a vacuum device located on one side of said conveyor for applying a vacuum in said chamber to draw fibrous material introduced into said chamber onto the opposite side of said conveyor forming a non-woven pad on said conveyor which has a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber to said outlet thereof, said apparatus comprising:
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first dispenser means for intermixing moisture-absorbent material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; thermoplastic material supply means for supplying hot thermoplastic material; means for transmitting a moisture-wicking substance to said thermoplastic material supply means for intermixing with said thermoplastic material to form a blend; second dispenser means connected to said supply means to receive said blend of thermoplastic material and moisture-wicking substance; control means for causing said second dispenser means to form thermoplastic fibers of said blend in which at least a portion of said moisture-wicking substance is located at the exterior surface of said fibers, and for discharging said thermoplastic fibers into said forming chamber for intermixing with said moisture-absorbent material and said fibrous material being drawn into said conveyor at said predetermined location to form a layer of intermixed fibrous material, moisture-absorbent material and fibers of thermoplastic material and a moisture-wicking substance within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said moisture-absorbent material and said thermoplastic fibers. - View Dependent Claims (40)
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41. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout a selected portion of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said chamber for intermixing with said first material and said fibrous material being drawn onto said conveyor at said predetermined location; third dispenser means for intermixing a third material with said fibrous material, first material and thermoplastic fibers being drawn onto said conveyor at said predetermined location; means for positioning a moisture-wicking substance at the exterior surface of at least one of said thermoplastic material and third material in an effective amount so that said exterior surface of said thermoplastic fibers formed from said thermoplastic material and said exterior surface of said third material are capable of wicking moisture, whereby a layer of intermixed fibrous material, first material, thermoplastic fibers, third material and moisture-wicking substance is formed within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material, said thermoplastic fibers and said third material. - View Dependent Claims (42, 43, 44, 45)
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46. Apparatus for forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions of the thickness of said non-woven pad, comprising:
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a chamber having an inlet and an outlet; a conveyor movable between said inlet and said outlet of said chamber, said conveyor having a first side and a second side; means for introducing fibrous material into said chamber; vacuum means located on said first side of said conveyor for applying a vacuum in said chamber to draw said fibrous material onto said second side of said conveyor, said fibrous material forming a non-woven pad on said second side of said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said second side of said conveyor and a top surface which slopes upwardly relative to said conveyor from said inlet of said chamber toward said outlet thereof; first dispenser means for intermixing said first material with a portion of said fibrous material being drawn onto said conveyor at a predetermined location relative to said upwardly sloping top surface of said non-woven pad; second dispenser means for forming thermoplastic fibers from said thermoplastic material and for dispensing said thermoplastic fibers into said chamber for intermixing with said fibrous material being drawn onto said conveyor at a location upstream from said predetermined location; means for positioning a moisture-wicking substance at the exterior surface of said thermoplastic material in an effective amount so that said exterior surface of said thermoplastic fibers formed therefrom are capable of wicking moisture; third dispenser means for intermixing said third material with said fibrous material being drawn onto said conveyor at a location downstream from said predetermined location; means for positioning a moisture-wicking substance at the exterior surface of said third material in an effective amount so that said exterior surface of said third material is capable of wicking moisture, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and said thermoplastic fibers having moisture-wicking substance at the exterior surface thereof which is drawn onto said conveyor upstream from said predetermined location, a second layer of intermixed fibrous material and said first material which is drawn atop said first layer at said predetermined location, and a third layer of intermixed fibrous material and said third material having moisture-wicking substance at the exterior surface thereof which is drawn atop said second layer downstream from said predetermined location.
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47. A method of forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum to draw said fibrous material onto a pad support moving in a first direction within said chamber, said fibrous material forming a non-woven pad on said pad support which increases in thickness in said first direction of movement of said pad support; intermixing said first material with a portion of said fibrous material being drawn onto said pad support at a predetermined location within said chamber; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material and said first material being drawn onto said pad support at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said pad while maintaining another portion of said thickness of said pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (48)
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49. A method of forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a predetermined portion of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum to draw said fibrous material onto a pad support moving in a first direction within said chamber, said fibrous material forming a non-woven pad on said pad support which increases in thickness in said first direction of movement of said pad support; intermittently intermixing said first material with a portion of said fibrous material being drawn onto said pad support at a predetermined location within said chamber; forming thermoplastic fibers from said thermoplastic material in a dispenser means and intermittently dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material and said first material being drawn onto said pad support at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad at spaced locations along the length of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (50)
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51. A method of forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum to draw said fibrous material onto a pad support moving in a first direction within said chamber, said fibrous material forming a non-woven pad on said pad support which increases in thickness in said first direction of movement of said pad support; intermixing said first material with a portion of said fibrous material being drawn onto said pad support at a predetermined location within said chamber; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material and said first material being drawn onto said pad support at said predetermined location; intermixing said third material with said fibrous material, said first material and said thermoplastic fibers being drawn onto said pad support at said predetermined location to form a layer of intermixed fibrous material, first material, thermoplastic fibers and said third material within a predetermined portion of said thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material, thermoplastic fibers and said third material. - View Dependent Claims (52)
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53. A method of forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum to draw said fibrous material onto a pad support moving in a first direction within said chamber, said fibrous material forming a non-woven pad on said pad support which increases in thickness in said first direction of movement of said pad support; intermixing a first material with a portion of said fibrous material being drawn onto said pad support at a predetermined location within said chamber; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material being drawn onto said pad support at a location upstream from said predetermined location; intermixing said third material with said fibrous material being drawn onto said pad support at a location downstream from said predetermined location, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and thermoplastic fibers which is drawn onto said pad support upstream from said predetermined location, a second layer of intermixed fibrous material and first material which is drawn atop said first layer at said predetermined location, and a third layer of intermixed fibrous material and third material which is drawn atop said second layer downstream from said predetermined location. - View Dependent Claims (54)
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55. A method of forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber, said fibrous material forming a non-woven pad having a bottom surface resting on one side of said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet toward the outlet of said chamber; dispensing said first material into said chamber at a predetermined location along said upwardly sloping top surface of said non-woven pad, said first material being intermixed with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber so that said thermoplastic fibers intermix with said fibrous material and said first material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said pad while maintaining another portion of said thickness of said pad substantially free of said first and second materials. - View Dependent Claims (56, 57)
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58. A method of forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a predetermined portion of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber, said fibrous material forming a non-woven pad having a bottom surface resting atop said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet toward the outlet of said chamber; intermittently dispensing said first material into said chamber at a predetermined location along said upwardly sloping top surface of said non-woven pad, said first material being intermixed with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and intermittently dispensing said thermoplastic fibers from said dispenser means into said chamber so that said thermoplastic fibers intermix with said fibrous material and said first material being drawn onto said conveyor at said predetermined location to form a layer of intermixed fibrous material, first material and thermoplastic fibers within a predetermined portion of said thickness of said non-woven pad at spaced locations along the length of said non-woven pad while maintaining another portion of the thickness of said non-woven pad substantially free of said first and second materials. - View Dependent Claims (59, 60)
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61. A method of forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber between an inlet and outlet thereof, said fibrous material forming a non-woven pad on said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet of said chamber toward said outlet thereof; dispensing said first material into said chamber at a predetermined location relative to said upwardly sloping top surface of said non-woven pad for intermixing with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material and said first material being drawn onto said pad support at said predetermined location; dispensing a third material into said chamber at said predetermined location for intermixing with said fibrous material, said first material and said thermoplastic fibers being drawn onto said conveyor thereat to form a layer of intermixed fibrous material, first material, thermoplastic fibers and third material within a predetermined portion of the thickness of said non-woven pad while maintaining another portion of said thickness of said non-woven pad substantially free of said first material, thermoplastic fibers and third material. - View Dependent Claims (62, 63, 64)
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65. A method of forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interspersed throughout selected portions thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber between an inlet and outlet thereof, said fibrous material forming a non-woven pad on said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet of said chamber toward said outlet thereof; dispensing a first material into said chamber at a predetermined location relative to said upwardly sloping top surface of said non-woven pad for intermixing with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material being drawn onto said conveyor at said predetermined location; dispensing a third material into said chamber for intermixing with said fibrous material being drawn onto said conveyor at a location downstream from said predetermined location, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and thermoplastic fibers which is drawn onto said conveyor upstream from said predetermined location, a second layer of intermixed fibrous material and first material which is drawn atop said first layer of said predetermined location, and a third layer of intermixed fibrous material and third material which is drawn atop said second layer downstream from said predetermined location. - View Dependent Claims (66, 67)
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68. A method of forming a non-woven pad of fibrous material with a first material and a thermoplastic material interspersed throughout a selected portion of the thickness thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber, said fibrous material forming a non-woven pad having a bottom surface resting on one side of said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet toward the outlet of said chamber; dispensing said first material into said chamber at a predetermined location along said upwardly sloping top surface of said non-woven pad, said first material being intermixed with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber so that said thermoplastic fibers intermix with said fibrous material and said first material being drawn onto said conveyor at said predetermined location; dispensing a moisture-wicking substance at the exterior surface of said thermoplastic material in an effective amount so that said exterior surfaces of said thermoplastic fibers formed therefrom are capable of wicking moisture, whereby a layer of intermixed fibrous material, first material and thermoplastic fibers having moisture-wicking material at the exterior surface thereof is formed within a predetermined portion of said thickness of said pad while maintaining another portion of said thickness of said pad substantially free of said first material and said thermoplastic fibers. - View Dependent Claims (69, 70, 71, 72)
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73. A method of forming a non-woven pad of fibrous material with a first material, a thermoplastic material and a third material interposed throughout selected portions thereof, comprising:
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introducing fibrous material into a chamber; applying a vacuum in said chamber to draw said fibrous material onto a conveyor moving through said chamber between an inlet and outlet thereof, said fibrous material forming a non-woven pad on said conveyor which increases in thickness in a direction from said inlet of said chamber toward said outlet thereof, said non-woven pad having a bottom surface resting on said conveyor and a top surface which slopes upwardly relative to said conveyor from the inlet of said chamber toward said outlet thereof; dispensing a first material into said chamber at a predetermined location relative to said upwardly sloping top surface of said non-woven pad for intermixing with a portion of said fibrous material being drawn onto said conveyor at said predetermined location; forming thermoplastic fibers from said thermoplastic material in a dispenser means and dispensing said thermoplastic fibers from said dispenser means into said chamber for intermixing with said fibrous material being drawn onto said conveyor at a location upstream from said predetermined location; positioning a moisture-wicking substance at the exterior surface of said thermoplastic material in an effective amount so that the exterior surfaces of said thermoplastic fibers formed from said thermoplastic material are capable of wicking moisture; dispensing a third material into said chamber for intermixing with said fibrous material being drawn onto said conveyor at a location downstream from said predetermined location; positioning a moisture-wicking substance at the exterior surface of said third material in an effective amount so that said exterior surface of said third material is capable of wicking moisture, whereby said non-woven pad is formed with a first layer of intermixed fibrous material and thermoplastic fibers having moisture-wicking substance at the exterior surface thereof which is drawn onto said conveyor upstream from said predetermined location, a second layer of intermixed fibrous material and first material which is drawn atop said first layer at said predetermined location, and a third layer of intermixed fibrous material and third material having moisture-wicking substance at the exterior surface thereof which is drawn atop said second layer downstream from said predetermined location. - View Dependent Claims (74, 75, 76, 77, 78)
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Specification