Pressware die set with product ejectors at outer forming surfaces
US7070729B2 · kind B2 · utility
5Cited by
24References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Aug 24, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/712
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved pressware die set includes mechanical ejectors for removing formed product from the punch. A preferred embodiment includes rocker-style ejectors free from edges or other asperities which may tend to snag and mar the product during the production process. Most preferably, the outward surfaces of the rocker members extend beyond the perimeter of a paperboard blank positioned for forming so the paperboard blank does not encounter an obstruent outward edge during forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.