Disposable container for dispensing of photographic developing liquids
US5148208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1990 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Jul 20, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D13/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A disposable container in the shape of a bottle made of molded polyethylene plastic serves as a reservoir for a photographic development liquid, that is circulated between the container's reservoir and a machine. The container has large planar sides to which good thermal contact is made by electrical heating pads for the purpose of heating the liquid within the container's reservoir. A substantially planar top surface of the container defines a central outlet aperture. This aperture connects to a feed tube which extends into the container's reservoir. The container is mounted upright to the machine's bottom surface by a screw collar. The machine's bottom surface is complementary to, and mates with, the container's top surface. A fluid-tight compressive seal is made in a first annular region about the container's central aperture by means of an O ring or gasket. A second annular section of the container's top surface includes a number of inlet orifices through which circulating fluid is returned to the container's reservoir, and through which gases are vented. Another fluid-tight compressive seal is made (also by means of an O ring or gasket) at an outermost annular section of the c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.