Method of producing a lid device for wide-mouthed container
US5147591A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Apr 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/14983
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a lid device for a wide-mouthed container which comprises a lid body having an opening of a predetermined shape, and a closure member made of a soft synthetic resin for closing the opening of the lid body. According to the method, the lid body and a vapor impervious film are placed between a first mold body and a second mold body with the film located on the side of the second mold body. The first mold body has a closure forming cavity, whereas the second mold body has a tab forming cavity. A fluid synthetic resin is injected under pressure from the side of the first mold body to fill the closure forming cavity. The resin is caused to break through the film to fill the tab forming cavity, thereby forming a pull tab integral with the closure member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.