Photographic processing tank
US4168117A · kind A · utility
Inventor
Key dates
| Filing date | Jan 12, 1979 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Jan 12, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic developing tank is described to aid in processing light-sensitized photographic materials such as paper, plates, or film. The tank is formed as a unitary body structure having an enclosed water cavity extending between and defined by integral walls of the tank structure. A top wall of the structure includes two or more indentations to form integral photographic processing trays. The indentations extend downwardly into the water cavity to bottom walls that are spaced upwardly from the unitary base wall of the tank. Drain passageways extend from the indentations outward through the cavity to the exterior of the tank. Petcocks are provided at the outer ends of the passageways to allow individual drainage of the fluid contents from the respective trays. Inlet and discharge ports are provided that enable water to flow through the water cavity. The water while in the water cavity completely surrounds the peripheral walls of the indentations as well as the bottom walls thereof. The indentation walls are of uniform thickness so heat is transferred evenly through the walls to the processing chemicals held within the indentations. Consequently the chemicals in the various tray…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.