Weather strip and method and apparatus for extrusion-molding the same
US5958318A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60J10/248
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A die is formed with an opening having substantially the same shape as a fundamental cross-sectional shape of an extrusion member. A first core is formed with a projecting portion projecting forward beyond a front surface of the die. A movable die for changing the external shape of a sealing portion is disposed on the front surface of the die. The movable die is allowed to move between a position where a curved surface formed at the forward end thereof is kept away from the projecting portion of the first core and another position where the curved surface comes close to the projecting portion. Further, first and second movable cores are inserted in the opening of the die, these movable cores being moved forward and backward along the direction in which EPDM is extruded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.