Method and extruding die apparatus for producing a plastic closure strip
US4540537A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Mar 1, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extrusion die apparatus for producing at least one plastic closure strip having profile and base portions, includes a die body having a die face, a profile channel defined in the die body and communicating with a profile die opening in the die face for extruding a profile portion, and a base channel defined in the die body and communicating with a base die opening in the face for extruding a base portion. The channels are adjacent to each other near the die openings and separated by a portion of the die body which terminates short of the face so that the extruded profile and base portions join together before exiting the die body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.