Film transport device with sprocket teeth and film pressure skid
US5244137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1990 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B1/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film transport device for a film with two uniformly distributed rows of holes. Transport is accomplished with a film transport sprocket with a series of teeth disposed in spaced array along a cylindrical tooth circle, which teeth engage the holes in the film and whose tooth circle is driven by a drive motor. A pressure skid brings the holes in the film into engagement with the teeth of the film transport sprocket. Each sprocket tooth has a root portion that merges with the cylindrical tooth circle structure. A base portion adjacent the root portion directly abuts the root portion and has a film support surface at a height relative to the surface of that tooth circle structure that corresponds to the thickness of the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.