Title:
DRUM PROVIDED WITH SPIRAL ON ITS SURFACE IN A PHOTOGRAPHIC PROCESSING APPARATUS
Document Type and Number:
WIPO Patent Application WO/1993/011463
Kind Code:
A1
Abstract:
It is known to use rotating drums in photographic processing apparatus. However, in many embodiments, relatively large volumes of processing solution are required for effective operation of the apparatus. This makes most drum arrangements unsuitable for use with unstable chemistry and single use chemistry as the processing solutions need to be replaced frequently. Described herein is an improvement to the surface (24) of a drum (20) in photographic processing apparatus incorporating a drum arrangement to form a low volume processing tank. The improvement comprises forming a spiral (22) either on or in the surface (24) of the drum (20). This has the advantage of improving the process activity of the apparatus and prevents the material being processed from adhering to the drum surface.
Inventors:
FYSON JOHN RICHARD (GB)
GLOVER EDWARD CHARLES TIMOTHY (GB)
GLOVER EDWARD CHARLES TIMOTHY (GB)
Application Number:
PCT/EP1992/002708
Publication Date:
June 10, 1993
Filing Date:
November 25, 1992
Export Citation:
Assignee:
KODAK LTD (GB)
EASTMAN KODAK CO (US)
EASTMAN KODAK CO (US)
International Classes:
G03D3/13; G03D5/00; G03D3/00; G03D5/04; G03D13/04; (IPC1-7): G03D3/13; G03D13/04
Foreign References:
| DE2344913A1 | 1975-03-20 | |||
| US2605684A | 1952-08-05 | |||
| US3943541A | 1976-03-09 | |||
| US3595156A | 1971-07-27 | |||
| US2861508A | 1958-11-25 | |||
| DE2552942A1 | 1976-06-10 | |||
| US4187022A | 1980-02-05 |
Download PDF: