Sheet transporting
US5754913A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Jun 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2404/185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a system for transporting film materials, rotation of the transported film caused by uneven stress across a width of the film is eliminated by providing a pinch roll drive in which the driven roll is a precision metal roll and the non-driven roll is a rubber roll, the outer cylindrical surface of which is defined by a plurality of axially-spaced annular ribs. Accumulated error is removed at regular intervals by braking the film to cause correction of slippage. Feed under uniform stress is achieved by forming a dancer roll film loop and correcting for differential alignment of the various transport rolls by displacing a portion of one side of the loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.