Disposable plastic lid
US4076123A · kind A · utility
42Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1976 |
| Grant date | Feb 28, 1978 |
| Priority date | — |
| Expiry date | Jun 17, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00796
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A thin wall disposable plastic lid designed to stack with other substantially identical lids without compacting having a circular closure wall and a surrounding downwardly extending skirt. A pair of downwardly extending, closely spaced, annular ribs are formed in the circular closure wall, and a plurality of upwardly extending bosses are also formed in the closure wall and span the space between the ribs. The bosses engage the bottom of the ribs of the next upper lid in the stack when nested to prevent the lids from jamming together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.