Other

Delta Plastics, Inc.

Lothar Schweigert

Ui Hwan O

A closure for a container has a cap portion with screw threads to engage screw threads on the container and a tamper evident band connected to the cap by frangible bridge elements. The tamper evident band includes segments that engage a retaining flange on the container to separate the band when the closure is first removed from the container. Expansion segments on the band permit the closure to be initially installed on the container without breaking the frangible elements.

Tamper evident closure

A molding apparatus and method of injection, compression or otherwise molding a closure having projections extending inwardly from a skirt of the closure includes a plurality of slides for movement obliquely with respect to an inner mold core. A ring contacts the closure and surrounds the slides. Movement of the ring relative to the mold core results in the movement of the closure which moves the slides to disengage recesses on the slides. The recesses are used to form the projections on the closure. The ring contacts the closure and advances the closure away from the mold core. The projections seated within the recesses on the slides move the slides obliquely relative to the mold core and ultimately disengage the recesses from the projections thereby releasing the closure from the mold. The movement of the slides is independent from the movement of the ring so that complicated mechanisms for movement of the slides are not required according to this invention.

Apparatus and method for molding plastic closures

An injection molding apparatus and method of injection molding a closure having projections extending inwardly from a skirt of the closure includes a plurality of slides for movement obliquely with respect to an inner mold core. A ring contacts the closure and surrounds the slides. Movement of the ring relative to the mold core results in the movement of the closure which moves the slides to disengage recesses on the slides. The recesses are used to form the projections on the closure. The ring contacts the closure and advances the closure away from the mold core. The projections seated within the recesses on the slides move the slides obliquely relative to the mold core and ultimately disengage the recesses from the projections thereby releasing the closure from the mold. The movement of the slides is independent from the movement of the ring so that complicated mechanisms for movement of the slides are not required according to this invention.

Method for injection molding plastic closures

A method of injection molding a container having a body and an upper opening surrounding a neck of a container produces a container in which a diameter of the body is greater than the diameter of the neck. The method includes injecting plastic or other appropriate material into a cavity of the mold assembly and, after the container material has cooled sufficiently to retain its shape, sequentially removing portions of the mold assembly from the container.

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Incline Village, NV, United States of America

Lothar Schweigert