Filter for a photothermographic developer
AssigneeMinnesota Mining and Manufacturing Company
InventorRobert M. Biegler
Life of this patent
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Abstract
The present invention provides an alternative filtering system for use with a photothermographic developing apparatus. The inventive filtering system is a three stage system which provides for condensation of fatty acids and removal of particulates prior to absorbing odor causing by-products of photothermographic development.
Claims12
A filter system for use with a photothermographic thermal developing apparatus comprising
- a) an inlet through which hot processing gases are directed to
- b) a heat conducting, condensate accumulator,
- c) a particulate filter located at or after the exit of the heat conducting, condensate accumulator and upstream from,
- d) an absorbent block, and
- e) an outlet through which the filtered air leaves the filtering system.
A thermal developing unit for the thermal development of photothermographic media which comprises, in a housing, a means for thermally developing photothermographic media by placing said media in contact with a heated element within a case, and, attached to the outside of the housing, a filter system comprising
- a) an inlet through which hot processing gases are directed to
- b) a heat conducting, condensate accumulator,
- c) a particulate filter located at or after the exit of the heat conducting, condensate accumulator and upstream from,
- d) an absorbent block, and
- e) an exit through which the filtered air leaves the filtering system.
Dependencies are inferred from the claim text.