Reduced-skew web drive between rollers of differing coefficients of friction, particularly to transport paper, metal or film in a laser imager
US5326011A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Jan 22, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2404/143
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A web of material, typically paper, metal or film and most commonly roll photographic plate material, passes between a first, driven, roller made from material with a high coefficient of friction, typically neoprene rubber, and a second, driven, roller made from material with a low coefficient of friction, typically metal or nylon. The high-friction drive roller (only) is positionally adjustable. The web is driven straight ahead, without appreciable undesirable steering or skew, over a broad range of adjustments of the separation, and the parallelism, between the two rollers. The web motion is responsive substantially to only the high-friction drive roller, and the web speed may accordingly be regulated, including so as to be maintained highly uniform, in response to the drive roller (only).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.