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US 4,419,434 AGranted
Image transfer film unit with modified surface layer containing capillaries
AssigneeEastman Kodak Company
InventorsMichel F. Molaire, John V. Williams
Life of this patent
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Abstract
An image transfer film unit is disclosed in which a surface capillary layer is provided to supply processing liquid uniformly to an imaging portion of the film unit.
Claims10
In an image transfer film unit comprised of
- a support and, located on said support,
- an imaging portion comprised of radiation-sensitive imaging means capable of providing mobile image forming material as a function of exposure and means for receiving said mobile image forming material from said imaging means to form a viewable transferred image,
- the improvement comprising a capillary surface layer overlying said imaging portion and forming an array of open-ended capillaries for supplying processing liquid uniformly to said imaging portion, the capillaries subtending within the image viewing area of said image transfer film unit more than half the area of said capillary surface layer.
In an image transfer film unit comprised of
- a transparent film support and, located on said support,
- process control layers,
- an image receiving layer,
- a liquid permeable reflective layer,
- a liquid permeable opaque layer, and
- an imaging portion layer unit including radiation-sensitive imaging means for providing mobile image forming material as a function of exposure,
- the improvement comprising
- a capillary surface layer positioned to overlie said imaging portion layer unit during imagewise exposure of said image transfer film unit,
- said capillary surface layer forming an array of capillaries for uniformly supplying processing liquid to said imaging portion layer,
- the capillaries having a width in the range of from 5 to 150 microns,
- the capillaries having a ratio of height to width of less than 3:2, with the minimum height being at least 5 microns, and
- the capillaries subtending within the image viewing area of said image transfer film unit more than 70 percent the area of said capillary surface layer.
9 more elements
Dependencies are inferred from the claim text.