Dispensing closure and method
First Claim
1. In a one piece molded plastic resealable dispensing closure of the type comprising:
- a closure base defining a seal surface;
a dispensing spout defining a passage through said base, with said spout being swivelly mounted by a pivot axis to said base for positioning in a dispensing position and, alternatively, in a sealing position;
an invertible flexible diaphragm, said diaphragm having a peripheral portion connected to said base and means connecting another peripheral portion of said invertible diaphragm to said spout, with a portion of said peripheral portion located most distant from said pivot axis and said pivot axis defining a plane, whereby movement of said spout swivels said invertible diaphragm through said plane, responsive to which said invertible diaphragm inverts;
said diaphragm providing an arrangement that pre-loads said spout in the direction of the dispensing position, when said spout is in the dispensing position, and pre-loads said spout in the direction of the sealing position, when said spout is in the sealing position;
the improvement wherein said means connecting said spout to said invertible diaphragm comprises;
a elastic foldable diaphragm means for coupling a force applied to pivot said spout to said invertible diaphragm during movement of said spout to swivel and permit inverting of said invertible diaphragm as said spout is moved to the sealing position, said foldable diaphragm being sufficiently pliant to be pulled by said spout and placed in a position underlying said spout with a bend formed at the juncture of said foldable diaphragm with said spout, when said spout is in said sealing position, said spout initially folding over a portion of said foldable diaphragm in overlying relationship with a remaining portion of said foldable diaphragm to create a bend in said foldable diaphragm, responsive to said spout being moved from said dispensing position toward said sealing position, and then unfolds said diaphragm, responsive to said spout being moved further to said sealing position, whereby the location of said bend moves along said foldable diaphragm to said juncture of said foldable diaphragm with said spout;
wherein said foldable diaphragm reduces said pre-load on said spout in the direction of said dispensing position responsive to folding over; and
wherein said invertible and foldable diaphragms collectively define a predetermined surface area when said spout is in said dispensing position with each said diaphragm covering a more than insignificant portion of said surface area.
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Accused Products
Abstract
A resealable plastic closure formed of one piece of plastic material includes a swivelable diaphragm to allow a hinged spout to pivot between an upright dispensing position and a down closed position. To permit easier operation in closures containing diaphragms in small sizes, the diaphragm is divided by a crease, hinging the two section, and one diaphragm section is invertible and the other diaphragm section is pliable, deformable. Improved side latches for the spout are provided by flexible latch member supporting wall that may flex into an adjacent cavity on the underside of the closure base. The fabrication of those side latches is enhanced in a process that withdraws one tool to create a void behind the latch member supporting walls so that the other tool, which forms the latch member, may be withdrawn without damaging the member by forcing the walls to flex laterally as the second tool is withdrawn. In one such resealable closure that is particularly adapted for drinking cup application a novel spout seal of cylindrical tubular section provides the sealing function by collapsing the cylindrical wall in response to the spout being placed in the closed position.
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Citations
27 Claims
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1. In a one piece molded plastic resealable dispensing closure of the type comprising:
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a closure base defining a seal surface; a dispensing spout defining a passage through said base, with said spout being swivelly mounted by a pivot axis to said base for positioning in a dispensing position and, alternatively, in a sealing position; an invertible flexible diaphragm, said diaphragm having a peripheral portion connected to said base and means connecting another peripheral portion of said invertible diaphragm to said spout, with a portion of said peripheral portion located most distant from said pivot axis and said pivot axis defining a plane, whereby movement of said spout swivels said invertible diaphragm through said plane, responsive to which said invertible diaphragm inverts; said diaphragm providing an arrangement that pre-loads said spout in the direction of the dispensing position, when said spout is in the dispensing position, and pre-loads said spout in the direction of the sealing position, when said spout is in the sealing position; the improvement wherein said means connecting said spout to said invertible diaphragm comprises; a elastic foldable diaphragm means for coupling a force applied to pivot said spout to said invertible diaphragm during movement of said spout to swivel and permit inverting of said invertible diaphragm as said spout is moved to the sealing position, said foldable diaphragm being sufficiently pliant to be pulled by said spout and placed in a position underlying said spout with a bend formed at the juncture of said foldable diaphragm with said spout, when said spout is in said sealing position, said spout initially folding over a portion of said foldable diaphragm in overlying relationship with a remaining portion of said foldable diaphragm to create a bend in said foldable diaphragm, responsive to said spout being moved from said dispensing position toward said sealing position, and then unfolds said diaphragm, responsive to said spout being moved further to said sealing position, whereby the location of said bend moves along said foldable diaphragm to said juncture of said foldable diaphragm with said spout;
wherein said foldable diaphragm reduces said pre-load on said spout in the direction of said dispensing position responsive to folding over; and
wherein said invertible and foldable diaphragms collectively define a predetermined surface area when said spout is in said dispensing position with each said diaphragm covering a more than insignificant portion of said surface area. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a one piece resealable closure of plastic material of the type containing a pivotable spout and a diaphragm moved by said spout mounted on a closure base in which said spout is swivelly mounted to said base for movement about a pivot axis between a dispensing position and a closed position and said diaphragm is swivelly mounted to said base for swiveling movement by said spout, said diaphragm having an edge most distant from said pivot axis, said distant edge defining with said pivot axis a plane;
- said spout having a foot end containing a seal for sealing engagement with a sealing surface of said closure base responsive to said spout being swiveled about said pivot axis into said closed position, the improvement wherein said diaphragm comprises a flexible compound diaphragm of predetermined surface area, said compound diaphragm including a flexible foldable diaphragm and an invertible diaphragm serially connected in the order recited between said spout foot end and said closure base with each said flexible foldable diaphragm and invertible diaphragm comprising a more than insignificant portion of said predetermined surface area; and
said invertible diaphragm inverting responsive to being swiveled through said plane, and wherein a portion of said foldable diaphragm is folded over in overlying relationship with a remaining portion thereof to create a bend in said foldable diaphragm, responsive to said spout being pivoted from said dispensing position toward said closed position, and then unfolds, responsive to said spout being pivoted further to said closed position, wherein said bend moves along said flexible foldable diaphragm to said juncture of said flexible foldable diaphragm with said foot end of said spout. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
- said spout having a foot end containing a seal for sealing engagement with a sealing surface of said closure base responsive to said spout being swiveled about said pivot axis into said closed position, the improvement wherein said diaphragm comprises a flexible compound diaphragm of predetermined surface area, said compound diaphragm including a flexible foldable diaphragm and an invertible diaphragm serially connected in the order recited between said spout foot end and said closure base with each said flexible foldable diaphragm and invertible diaphragm comprising a more than insignificant portion of said predetermined surface area; and
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16. A one piece resealable closure of plastic material, comprising:
- a pivotable spout and a diaphragm mounted on a closure base with said spout being swivelly mounted to said base for movement about a pivot axis between a dispensing position and a closed position and said diaphragm being swivelly mounted to said base for swiveling movement by said spout;
said diaphragm defining a surface area and having an edge most distant from said pivot axis, said most distant edge and said pivot axis defining a plane;
said spout having a base containing a seal for sealing engagement with a sealing surface of said closure base, responsive to said spout being swiveled into the closed position;
latch means for releasibly latching said spout in the closed position; and
wherein said diaphragm comprises;a flexible diaphragm and an invertible diaphragm serially connected between said spout base and said closure base, with each comprising a more than insignificant portion of said surface area; said invertible diaphragm inverting responsive to being swiveled through said plane and providing an arrangement that pre-loads said spout in the direction of the dispensing position, when said spout is in the dispensing position, and pre-loads said spout in the direction of the sealing position, when said spout is in the sealing position; said flexible diaphragm and said invertible diaphragm being angularly inclined relative to one another, when said spout is in the dispensing position, to define a crease therebetween; said flexible diaphragm including an upper end connected to said spout base and defining a bend line therewith at said upper end, wherein said flexible diaphragm is bendable relative to said spout at said connection with said spout base; said base of said spout being movable in an arcuate path to push said flexible diaphragm during the initial course of travel of said spout from said dispensing position to the closed position and, through said flexible diaphragm, to invert said invertible diaphragm and, during additional movement to the closed position, to place said flexible diaphragm in a position underlying said spout; and said flexible diaphragm being adapted to swivel about and be pushed and then be pulled by said arcuately moving base of said spout, whereby said flexible diaphragm is temporarily deformed and forms a bend therein that moves toward said spout base, responsive to said spout moving from said dispensing position toward said closed position, and is placed in a position underlying said spout responsive to said spout attaining the closed position. - View Dependent Claims (17, 18, 19)
- a pivotable spout and a diaphragm mounted on a closure base with said spout being swivelly mounted to said base for movement about a pivot axis between a dispensing position and a closed position and said diaphragm being swivelly mounted to said base for swiveling movement by said spout;
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20. In a one piece injection molded plastic closure of the type containing a movable spout that is pivotable about a pivot axis between a dispensing position and a sealed position and a diaphragm of predetermined surface area moved by said spout during pivoting of said spout, with said diaphragm having an edge most distant from said pivot axis, said edge and said pivot axis defining a plane, the improvement wherein said diaphragm comprises a sequential diaphragm, said sequential diaphragm containing a plurality of diaphragm sections with said sections being operated in sequence by said spout as said spout moves between said dispensing and sealed positions with one of said plurality of diaphragm sections being an invertible diaphragm operable to invert responsive to being moved through said plane and another of said plurality of diaphragm sections being a flexible diaphragm operable to wrap over upon itself and each diaphragm section comprising a more than insignificant portion of said predetermined surface area.
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21. A diaphragm formed of plastic material for connecting a pivotably mounted member to a base, said diaphragm defining a predetermined surface area, comprising:
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a first diaphragm section defining a flexible diaphragm; and a second diaphragm section defining an invertible diaphragm; said first and second diaphragm sections each comprising a greater than insignificant portion of said predetermined surface area; said second diaphragm section being connected integrally to said first diaphragm section for placing said two sections in a mechanical series relationship, wherein movement of said first diaphragm section forces movement of said second diaphragm section; said second diaphragm section having a peripheral portion for connection to said base and having the characteristic of elastically inverting when pushed with suitable force by said first diaphragm section when said peripherial portion is held in fixed position; and said first diaphragm section having a peripheral portion for connection to said pivotably mounted member and having the characteristic of flexurally wrapping over responsive to the application of sufficient torque to said peripheral portion by said pivotal member. - View Dependent Claims (22, 23)
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24. In a one piece resealable closure formed of injection molded plastic material of the type containing a pivotable spout and a diaphragm mounted on a closure base, wherein said spout is swivelly mounted to said base for movement between an upright dispensing position and a closed sealing position and said diaphragm is swively mounted to said base for movement by said spout, said closure base having an upperside surface and an underside surface with said spout providing a passage for flowable material from said underside surface of said closure base to said upperside surface thereof, and latch means for releasibly holding said spout in said closed position, said latch means further comprising a spout bar projection formed on each of the right and left hand sides of said spout laterally outwardly projecting therefrom and a corresponding base bar projection located on each of the right and left hand sides of said closure base and base bar mounting means for mounting said base bar projection to overlie and latchingly engage the corresponding spout bar projection when said spout is in the closed position;
- the improvement therein wherein said base bar mounting means for mounting said base bar projections comprises;
a first support wall on said base located to the left hand side of said spout for supporting one said base bar projection with one side of said wall being on the upper side surface of said base and the opposed side of said wall being on the underside surface of said base in spaced relation with other portions of said base to define a cavity behind said opposed side of said wall; a second support wall on said base located to the right hand side of said spout for supporting the other base bar projection with one side of said wall being on the upper side surface of said base and the opposed side of said wall being on the underside surface of said base in spaced relation with other portions of said base to define a cavity behind said opposed side of said wall, said walls being sufficiently flexible laterally into the respective cavity to permit said spout to move into the sealed position and be latched, responsive to application of a sufficient force applied to said spout, and to permit release of said latch responsive to application of a sufficient force, greater than the closing force, to said spout to move said spout from the closed position toward the dispensing position. - View Dependent Claims (25, 26, 27)
- the improvement therein wherein said base bar mounting means for mounting said base bar projections comprises;
Specification