Tamper evident composite closure
US4694970A · kind A · utility
40Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jun 16, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/145
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved composite closure is described which includes a cover portion and a molded plastic ring portion. The plastic ring portion is molded by a new method with top tool core removal which permits formation of inwardly directed tabs or fishhooks on the tamper evident ring. The molded ring also permits the cover to be inserted from the top of the ring rather than upwardly over the ring threads, which is an easier and faster method of assembling a composite closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.