Method and apparatus for making interfolded boxed bags
First Claim
1. A device for making interfolded boxed bags comprising:
- means for feeding a source of first plastic sheet material into said device;
means for feeding a source of second plastic sheet material into said device;
means for moving said first and second sheet material through said device;
first means for cutting and sealing said first sheet material into a first series of discrete plastic bags;
second means for cutting and sealing said second sheet material into a second series of discrete plastic bags, said bags of said second series of bags being staggered relative to said bags of said first series of bags, each said bag in said first and second series of bags including a leading edge and a trailing edge;
first means for selectively holding each bag of said first series of bags in a substantially flattened condition as said first series of bags move through said device;
second means for selectively holding each bag of said second series of bags in a substantially flattened condition as said second series of bags move through said device;
means for receiving said first and second series of said flattened bags in said staggered relationship; and
means for interfolding said first series of bags with said second series of staggered bags to create a stack of interfolded bags adapted for insertion into a dispensing container.
3 Assignments
0 Petitions
Accused Products
Abstract
An interfolded boxed bag arrangement and method and apparatus for making the same from plastic tube or sheeting stock. Plastic tubular or sheeting stock is unwound off two rolls under tension. The stock proceeds to various stations where it is cut into bag lanes by rotary knife blades. A bag lane is cut between each pair of rotary knife blades with a hot knife to form a sealed bottom for the bags. The bag lanes are then cut to a specified length with a hot knife which seals each side of the bag. Bags produced by each roll of stock material are staggered adjacent to one another and are interfolded with each other by a set of rotary gripper fingers and tucker fingers to form an interfolded stack of bags. The stacks are placed into a dispensing box for individual dispensing.
43 Citations
6 Claims
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1. A device for making interfolded boxed bags comprising:
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means for feeding a source of first plastic sheet material into said device; means for feeding a source of second plastic sheet material into said device; means for moving said first and second sheet material through said device; first means for cutting and sealing said first sheet material into a first series of discrete plastic bags; second means for cutting and sealing said second sheet material into a second series of discrete plastic bags, said bags of said second series of bags being staggered relative to said bags of said first series of bags, each said bag in said first and second series of bags including a leading edge and a trailing edge; first means for selectively holding each bag of said first series of bags in a substantially flattened condition as said first series of bags move through said device; second means for selectively holding each bag of said second series of bags in a substantially flattened condition as said second series of bags move through said device; means for receiving said first and second series of said flattened bags in said staggered relationship; and means for interfolding said first series of bags with said second series of staggered bags to create a stack of interfolded bags adapted for insertion into a dispensing container. - View Dependent Claims (2, 3, 4)
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5. A method for forming interfolded bags comprising the steps of:
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providing a source of first sheet material; providing a source of second sheet material; cutting said first and second sheet material into lanes; cutting said first sheet material in each said lane to a desired length; cutting said second sheet material in each said lane to a desired length, said cut sheet material formed from said second sheet material being staggered in relation to said cut sheet material formed from said first sheet material; sealing the edges of said cut first sheet material to form a first series of discrete open top bags; sealing the edges of said cut second sheet material to form a second series of discrete open top bags; and interfolding said bags from said first series of bags and from said series of bags one into the other to create a stack of interfolded bags.
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6. A device for making interfolded boxed bags comprising:
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first means for feeding a source of first plastic sheet material into said device; second means for feeding a source of second plastic sheet material into said device; a first roller; a first cutting and sealing knife positioned adjacent said first roller, said first roller and said first knife being rotatable in a timed fashion to cooperatively cut and seal said first sheet material into a first series of discrete bags; first vacuum means for holding said first series of bags to the surface of said first roller; a second roller disposed adjacent to said first roller; a second cutting and sealing knife positioned adjacent said second roller, said second roller and said second knife being rotatable in a timed fashion to cooperatively cut and seal said second sheet material into a second series of discrete bags which are staggered in relation to said first series of bags, each said bag in said first and second series of bags including a leading edge and a trailing edge; second vacuum means for holding said second series of bags to the surface of said second roller; a first drum having a pair of tucker fingers located opposite each other and a pair of gripper fingers located opposite each other, said gripper fingers being located in indentations in the surface of said drum; and a second drum having a pair of tucker fingers located opposite each other and a pair of gripper fingers located opposite each other, said gripper fingers being located in indentations in the surface of said second drum, said first and second drums being rotatable in timed fashion such that the tucker finger of one drum will insert into the indentation for the gripper finger on the other drum, each said tucker finger inserting the trailing edge of a preceding bag and the ledging edge from a preceding bag from one of said series of bags into the midsection of a bag from said other series of bags and into said indentation whereupon said gripper finger will releasably grip said bags as said drum rotates.
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Specification