Knurled roller film transport and realted method
US5049900A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00602
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus is provided for scanning a photographic film or the like with a laser beam. The apparatus includes a roll source or cassette of film to be supplied and used and a take-up cassette to receive the exposed film in the form of a roll. Between the source of the film and the take-up cassette there is provided an arrangement consisting of one or two knurled segments or rollers which peripherally engage the film along the lateral edges thereof in order to transport the film past a laser beam generator and scanner adjacent which the knurled roller or rollers are positioned in order to draw the film at a closely controlled rate past a slot through which the laser beam exits in order to photographically process the film. Between the knurled roller or rollers and the take-up cassette are provided exit rollers which engage the film at a slightly faster speed than the speed at which the film is travelling. The exit rollers are arranged to engage the film with a force of about 21/2-4 pounds. The take-up cassette is provided with a slip clutch in order to compensate for the buildup of film on the roll as the process progresses. The source cassette is provided with lips which engage th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.