Owens-illinois Closure, Inc.

Weatherchem Corporation

Charles A Webster

Paul R Graham

James L Gregory

Douglas S Martin

Michael J Forsyth

Mark R Hock

Shawn Eric Kellogg

James P Black

Loleta T Tolliver-Rogers

Bradford R Seaman

Screw on caps for bottles that have an anti back off feature formed on a hinged tab of the cap engaging detent teeth below the threads on the bottle. The hinge has a unique configuration that enables the tab to snap into and hold a gripping position while avoiding temporary distortion or creep. The detent teeth are particularly suited for use with blow molded bottles and are capable of restraining a cap within a small angle of a fully tightened position to avoid any significant back off and potential leakage. In one embodiment, the anti back off feature is provided in a child resistant cap while in another embodiment this feature is provided in a simpler continuous thread cap.

Anti back off screw on closure

A tamper-indicating closure of integrally molded plastic construction that includes a base wall having a peripheral skirt with an internal thread for affixing the closure to the container finish. A tamper-indicating band is connected to an edge of the skirt by frangible bridges. A stop flange extends from an edge of the band remote from the skirt for abutment with a bead on the container finish to inhibit removal of the closure absent fracture of the frangible means. A plurality of circumferentially spaced openings extend radially through the skirt at a position between the frangible bridges and the internal thread. These openings provide for ingress of cleansing solution during a washing operation after the closure is applied to a container to flush any residue from between the tamper-indicating band and the closure finish. Drain openings preferably are provided in the stop flange and/or the tamper-indicating band to allow drainage of the flushing solution, and also to allow drainage of any accumulated liquid in wet-finish applications.

Tamper-indicating closure and method of manufacture

A tamper-indicating closure of integrally molded plastic construction that include a base wall having a peripheral skirt with internal threads for engaging external threads on a container finish. A tamper-indicating band is connected to the edge of the skirt by a plurality of circumferentially spaced integral frangible bridges. A stop flange extends from an edge of the band remote from the skirt for engagement with a bead on the container finish. The stop flange has a circumferentially continuous free edge remote from the band disposed in a plane parallel to the base wall. A plurality of circumferentially spaced openings are disposed in the stop flange adjacent to the band for drainage of liquid from between the closure skirt and the container finish. A plurality of circumferentially spaced gussets in the stop flange are at the free edge of the ring, with each gusset being disposed between an adjacent pair of drainage openings. The gussets function during inversion of the stop flange, from an axially outward orientation as molded to an axially inward orientation for use, to absorb compressive stresses on the flange and thereby isolate portions of the flange surrounding the drainage openings from such compressive stresses. A plurality of circumferentially spaced lugs are molded on the inside surface of the closure for opposed abutment with the bead on the finish to help facilitate drainage from between the skirt and finish.

Squeeze and turn child resistant closure

Growing community of inventors

Bowling Green, OH, United States of America

Charles A Webster