Tamper evident cap having lift tab on bottom edge
US4934546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jan 30, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2401/35
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A snap-on, tamper evident plastic cap for a plastic bottle neck has a skirt with upper and lower internal locking beads which lock under extenral beads on the neck. The cap is not removable so long as the skirt is intact. The lower end of the skirt, including the lower bead, may be torn off to permit the cap to be removed. To facilitate removal, the cap skirt is formed with a score line which slants upward from the lower edge of the skirt to merge with a circumferential score line which terminates near the origin of the slanted score line. A third score line extends from the terminus of the circumferential score line down to the lower edge of the skirt. Thus there is a tab (a remnant of the original skirt) between the first and third score lines which functions as a lift tab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.