CLOSURE HAVING BAND WITH INTERNAL THREAD FORMED BY IMPRESSION
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to closures for mating with containers having a threaded finish. The closures comprise a flange and a skirt downwardly depending therefrom. The skirt includes a deformable element formed of a different material than that of the flange and skirt and disposed on an interior surface. The deformable element inner diameter is smaller than the outer diameter of the container, and accordingly deforms upon mating the closure with the container. The container threads impress threads into the deformable element to form threads on the closure. The deformable element is formed of a suitable material. The closures of the present invention provide for the use of high-speed press-on capping equipment.
16 Citations
34 Claims
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1-22. -22. (canceled)
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23. A method for forming a closure, comprising the steps of:
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injecting a first thermoplastic material into a first mold cavity to form a closure flange and a closure skirt, at least one of the flange or the skirt including at least one passage extending therethrough; and
injecting a second thermoplastic material through the at least one passage, to form a deformable element on an interior surface of the skirt. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A molding system for forming a closure, comprising:
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a first mold surface defining a first closure cavity therein for forming a first closure portion;
a pin extending from the mold surface through a portion of the first closure cavity for defining a passage therethrough; and
a second mold surface defining a second closure cavity for forming a deformable element on the first closure portion;
whereby the passage serves as a runner for injecting material into the second closure cavity. - View Dependent Claims (31, 32, 33)
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34-37. -37. (canceled)
Specification