Direct coupled degasser and liquefier
US5275793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/74
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention describes a method and apparatus in which solid gelatin chunks are liquefied, tempered, and debubbled in a single operation. The debubbling step is accomplished by evacuating and sealing off the loaded solid reservoir and heat exchanger before initiating the liquefying step. After the vacuum is applied, the gelled chunks are pressed into the heat exchanger, where heat is applied to the gelled chunks of photographic material. This liquefies the gelled chunks of photographic material. When the liquefied product gives a positive pressure at the heat exchanger outlet, the liquefied product is allowed to flow from the heat exchanger. Liquefying and tempering are performed as the solid chunks are pushed through the heat exchanger by the reservoir piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.