METHOD AND APPARATUS FOR CLOSING AND/OR SEALING RECEPTACLES
First Claim
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1. An apparatus for closing and/or sealing receptacles comprising:
- a support assembly adapted for mounting a receptacle having a sidewall and an open top, a head assembly adapted to receive a closure having a depending skirt with an outwardly projecting annular bead thereon, said support assembly and said head assembly being adapted to be positioned relative to each other so that said closure is disposed on the top of said receptacle with said skirt disposed adjacent an outwardly facing surface near the top of the sidewall of said receptacle, said head assembly including first and second dies, means to position the top of said closure against said first die, said second die including a draw ring having means to permit said closure to be disposed circumferentially inside said die with said projection being disposed above said draw ring, said draw ring being adapted to be moved upwardly with respect to the closure and container to engage the bead on the closure as restrained by said first die to constrict the bead radially inwardly towards the side wall of the receptacle as the draw ring is moved upwardly past the bead on the closure, and drive means for providing the relative motion between said draw ring and said closure and container.
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Abstract
A method for closing and/or sealing an open top container without subjecting the container to objectionable axial compressive forces. A closure having a skirt which forms a downwardly opening annular recess or groove and having a bead at the end of the skirt, is constrained against movement while the mouth of the container is moved upwardly into the groove. An inwardly acting compressive force then crimps the closure against the neck of the container, either by embedding the bead in the wall of the container or by gripping the wall of the container above the closure bead or by both. One form of apparatus for carrying out the method is illustrated in the drawings.
13 Citations
5 Claims
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1. An apparatus for closing and/or sealing receptacles comprising:
- a support assembly adapted for mounting a receptacle having a sidewall and an open top, a head assembly adapted to receive a closure having a depending skirt with an outwardly projecting annular bead thereon, said support assembly and said head assembly being adapted to be positioned relative to each other so that said closure is disposed on the top of said receptacle with said skirt disposed adjacent an outwardly facing surface near the top of the sidewall of said receptacle, said head assembly including first and second dies, means to position the top of said closure against said first die, said second die including a draw ring having means to permit said closure to be disposed circumferentially inside said die with said projection being disposed above said draw ring, said draw ring being adapted to be moved upwardly with respect to the closure and container to engage the bead on the closure as restrained by said first die to constrict the bead radially inwardly towards the side wall of the receptacle as the draw ring is moved upwardly past the bead on the closure, and drive means for providing the relative motion between said draw ring and said closure and container.
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2. An apparatus accordIng to claim 1, wherein said support means is resiliently mounted on the support assembly.
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3. An apparatus for closing and sealing receptacles comprising:
- a movable support assembly adapted for mounting a receptacle, said support assembly including pressure member means for yieldably mounting of said receptacle relative to said assembly, means for moving the support assembly and receptacle upwardly, a head assembly including a relatively stationary die and a relatively movable die, the relatively movable die having a slot adapted for receiving a closure, having an outwardly projecting bead thereon, and for positioning it for engagement with the top of the receptacle as the receptacle is moved upwardly, the relatively movable die comprising a draw ring adapted to engage the bead on the closure and to constrict it toward the outer wall of the receptacle as the relatively movable die is moved upwardly and while the top of the closure is in engagement with the relatively stationary die, and drive means for actuating the support assembly.
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4. An apparatus according to claim 3 wherein, the draw ring is resiliently mounted on the head assembly and coacts telescopically with the relatively stationary die to constrict the closure bead around the receptacle.
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5. An apparatus according to claim 3 wherein, said drive means operates to move the relatively movable die upwardly with relation to the relatively stationary die sufficiently far to provide a clearance above the sealed receptacle.
Specification