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Container with curled tamper-evident band to retain closure

a container and tamper-evident technology, applied in the direction of closure using stoppers, caps, liquid handling, etc., can solve the problems of container band breaking and evidence of tampering

Inactive Publication Date: 2000-06-13
PORTOLA PACKING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the band may be broken from the container along the line of weakness and thereafter the lid may be removed.
Fracture at the line of weakness gives evidence of tampering.

Method used

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  • Container with curled tamper-evident band to retain closure
  • Container with curled tamper-evident band to retain closure
  • Container with curled tamper-evident band to retain closure

Examples

Experimental program
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Embodiment Construction

Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the preferred embodiments, it will be understood that they are not intended to limit the invention to those embodiments. On the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims.

Container 11 is subject to wide modification. As here shown, it is depicted as a thin-walled, wide mouth container preferably made of high density polyethylene or polypropylene of the type used for various dairy products such as margarine, cottage cheese, and the like. It will be understood that the details of the structure of the container 11 are subject to wide modification. As illustrated herein, the container 11 has an upwardly-outwardly inclined conical wall 12 a...

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Abstract

A thin-walled, wide mouth molded plastic container is provided with a tamper evident band initially molded as a straight-walled cylinder spaced outwardly of the lip of the container and connected thereto by a frangible horizontal bridge. The upper edge of the cylindrical band extends above the level of the container lip. Subsequent to molding and preferably before capping, the band is curled inward by application of a curling tool. The container lid is axially applied, the outer edge of the lid displacing the curled band outward. The resilience of the band and bridge permits outward deflection and immediate restoration of the curl to its initial position. The curl prevents removal of the lid without fracture of the bridge and removal of the tamper-evident band.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThis invention relates to a new and improved container with a tamper-evident band to retain a closure. More particularly, the invention relates to a thin-walled, wide mouth container having a band attached to its upper peripheral edge which is inwardly curled to retain a cover lid. To remove the lid, the band must be removed, and this makes the container tamper-evident.2. Description of Related ArtCurling of plastic cylindrical bands is known in the art. For example, applying a concave tool to the edge of a cylindrical plastic member is shown in numerous patents to Thompson, U.S. Pat. Nos. 4,708,255; 4,709,824; 4,793,506; 4,872,304; 4,823,967; 4,811,857; and 4,856,667 being typical. These patents disclose a curled bead which is resilient and is compressed when a screw closure is applied to a container neck. Similar curling techniques are employed in the present invention, but the curled flange is employed for a totally different pu...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B65D43/02
CPCB65D43/0218B65D2101/0015B65D2543/00092B65D2543/00555B65D2543/00509B65D2543/00537B65D2543/00296B65D2401/10
Inventor LUCH, DANIELCHENAULT, RAWSON
Owner PORTOLA PACKING INC
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