Process for forming a plastic article
US4265852A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Feb 1, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process and apparatus for forming a laminated plastic article, especially a container. In one formation sequence, a flattened preform of desired perimeter configuration is formed, which preferably is multilayered, directly from thermoplastic materials. In another formation sequence, a preform is positioned in a thermoforming apparatus wherein, with edge portions of the preform is clamped and the midportions are mandrel-formed into a body having continuous integral side and bottom wall portions. This body is then trimmed and blow-molded to produce a desired product article. Residual portions of the starting preform can be trimmed away from the lip portions of the product article if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.