Method for producing plastic cartridge for sealants
US4816204A · kind A · utility
0Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Nov 24, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/715
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Plastic cartridge for packaging sealants is made by blow molding an extruded parison into a metal mold with a cavity whose interior diameter gradually increases toward the bottom in correspondence with the variation in thickness between the top and bottom of the parison, which variation in thickness results from longitudinal stretching of the extruded parison under its own weight. A plastic cartridge having equal inside top and bottom diameters is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.