Film supply monitor for film wrapping machine
US4501105A · kind A · utility
50Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1982 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Apr 26, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B2210/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a film wrapping machine for wrapping packages in stretchable film, a monitoring system is provided to generate a signal each time film is drawn into the machine. If no film is drawn into the machine indicating that the film source has expired, broken or otherwise become disengaged from the film feeding apparatus for the wrapping machine, the machine is stopped. The film draw into the machine is monitored by an electrical switch which is coupled to a tensioning roller, the motion of which is adjusted to activate the switch each time even at least a minimum length of film is drawn into the machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.