Apparatus having moveable pocket forming members for injection molding a composite plate
US3947199A · kind A · utility
1Cited by
9References
2Claims
0Family size
Inventors
Key dates
| Filing date | Dec 13, 1972 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 13, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/058
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A novel printing plate is produced by placing an electrotype shell and a partial base in a mold cavity, holding them in place in properly spaced relation to each other as by means of vacuum and hydraulically or pneumatically operated holddown mechanisms, and filling the mold cavity with molten plastic or similar synthetic material from a plastic injection machine. The partial base skeleton includes scarf cavities, and portions of this skeleton may be embedded in the plastic when it hardens into the final shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.