Film folding device
US4796405A · kind A · utility
8Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Sep 25, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B11/54
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a machine for wrapping filled trays in thermoplastic film, said machine having a film folding device in which the side folding arms and back folding bar move along linear paths in synchronized motion so that the points of coincidence between the back folding bar and the side folding arms define a curve which approximates a diagonal to the tray being wrapped. This film folding device provides uniquely smooth folds on the bottom of a tray which can be readily heat sealed to produce a relatively leakproof package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.