Method for making tamper-evident container closure
US4904435A · kind A · utility
11Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Dec 29, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/809
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a tamper-evident closure cap including the steps of forming a one piece closure cap from a plastic material having a top, a skirt depending from the top and a tamper-evident band depending from the skirt. The band has a radially inward directed rib and an annular portion between the skirt and the tamper-evident band. The annular portion is engaged with a cutting blade which has a cutting edge and series of spaced notches. The blade and the cap are rotated to form a plurality of circumferentially spaced bridges with a series of angularly inwardly disposed tabs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.