Total immersion transfer of photographic images between sprocket-registered strips of film
US4105329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Apr 26, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A printing tank contains a body of transparent liquid within which a main printing sprocket is totally immersed. Mechanism is provided for feeding one edge of a master strip of film onto the sprocket and in a curved path around a portion of the circumference of the sprocket. A curved support is provided to support the other edge of the master strip of film in a parallel relationship. An illuminated window is positioned between the sprocket and the curved support. A space between the window and the master strip of film is filled with the transparent liquid. In operation, the master strip of film is sprocket-registered while passing the printing aperture effected by the illuminated window. Means are also provided for transporting an unexposed strip of film in sprocket registry with the master strip of film at the aperture. PAC PRIOR ART Continuously driven printing machines for transferring photographic images from one moving strip of film to another are well-known, one being shown, for example, in the Jeapes Pat. No. 1,381,840 of 1921. In order to minimize or eliminate optical effects of scratches and other damage to the preprint or master film, it is also well-known to immerse a fi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.