Allan Stewart Maclean

US Patent:

41628349, Jul 31, 1979

Filed:

Dec 23, 1977

Appl. No.:

5/863992

Inventors:

Allan D. MacLean - North Easton MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1750

US Classification:

354 86

Abstract:

Processing apparatus for large format, instant cameras in which a metered supply of processing fluid, deposited as a puddle in a crease between negative and positive photographic sheets as they are fed from separate supply rolls to the nip of a pressure roll pair, is spread throughout an image format area by passage of the sheets through the pressure roll nip. Containment of the processing fluid laterally so that it is confined to the side margins of the image format area is effected by a pair of nozzle members each having a blade portion to lie in and generally complement the configuration of the crease at opposite ends thereof. The nozzle blades are formed with passageways through which air may be directed inwardly and downwardly against the ends of the processing fluid puddle during the time the sheets are fed through the pressure roll pair to spread the fluid uniformly over the image format.