Lined closure made by the unscrewing process
US4723685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Dec 19, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D50/041
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A two-piece child-resistant closure having a molded plastic inner component and a molded plastic outer component, the inner component having a double ended liner retention bead that projects radially inwardly from the inside of an annular skirt portion to retain a sealing liner in a position that is adjacent to the underside of a top panel portion thereof without the need for an adhesive, the inner portion further having a helically extending thread that projects radially inwardly from the annular skirt portion, the thread having an uppermost portion with a 0.degree. helical angle that is positioned between the spaced apart ends of the double ended liner retention bead to reduce the required vertical spacing between the liner retention bead and the start of the helical thread to permit the closure to be applied to a container with a standard finish portion. The inner component is made by a process in which it is removed form the molding tooling by unscrewing for maximum resistance to stripping from the finish of the container to which it is to be applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.