Tray sealing system incorporating beaded seal plate
US6701993B2 · kind B2 · utility
4Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7162
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tray sealing assembly includes a seal support frame for supporting a flange of a tray during sealing of a sealing film to the flange, a seal plate having a sealing surface provided with a raised bead, and a heater for heating the seal plate. The seal support frame is movable relative to the seal plate between a retracted position and a seal position in engagement with the seal plate. Preferably, the raised bead forms a continuous closed loop on the sealing surface. The raised bead produces a reliable seal between the sealing film and the tray flange, despite the presence of contaminants on the tray flange.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.