Conveyor provided with an endless belt tensioning mechanism
US4079834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1976 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Feb 6, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G23/44
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An endless belt conveyor provided with a tensioning mechanism which includes an idler in operative contact with the return run, the idler being supported by a movable carriage. Tension adjusting means are provided which may move the carriage and idler in either a first direction to increase the tension on the endless belt or in a second direction to reduce the tension for purposes of resplicing the belt. The tensioning mechanism further includes control means which senses the tension on the return run and which may initiate movement of the carriage in either direction. The means for sensing the tension includes a normally open limit switch which is adapted to close when the tension on the return run falls below a predetermined value. The means which may initiate movement of the carriage in the first direction include first means operable to energize the tension adjusting means a suitable time interval after the normally open limit switch has closed, and additional means which prevents operation of the tension adjusting means for an initial time interval during start-up of the conveyor. The control means further includes manually operable normally open contact means which, when clos…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.