Tamper-indicating closure with resilient locking projections
US6355201B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Sep 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/058
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a tamper-indicating closure having a plurality of resilient flexible projections bent upwardly and radially inwardly at a predetermined radius of curvature. The first step in the method includes providing a mold assembly comprising a female mold portion for forming the outer surface of the closure and a male mold portion for forming the closure's inner surface and its plurality of projections. The male and female mold portions are arranged for relative movement toward and away from each other between a mold open position and a mold closed position. When in the mold closed position, the male and female mold portions define a mold cavity in which the tamper-indicating closure is molded. The next steps in the method are to move the male and female mold portions into the mold closed position; to provide a mold material into the mold cavity; and, to maintained the mold portions in the mold closed position for a predetermined time period until the tamper-indicating closure is formed with its projections disposed at their predetermined radius of curvature. Next, the male mold portion is removed from the molded closure, whereby the projections temporarily bend fr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.