Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1982-11-04
1984-12-25
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430207, 354304, 156252, 156257, 156254, 156270, G03C 554, G03C 190, G03C 196, G03D 902
Patent
active
044904568
ABSTRACT:
Self-developing photographic film units are disclosed having an IIR sheet cut from an elongate web of material, a second sheet cut from an elongate web of material, and a mask sheet cut from an elongate web of material and spacer means between the IIR sheet and the second sheet. The mask sheet and spacer means serve to seal the IIR sheet and the second sheet together along opposite side margins thereof. A container of processing composition and a trap are disposed at opposite end margins of the film unit.
The IIR sheet is strippable between a portion thereof bearing an image after processing and other components of the film unit including a non-image-bearing portion of the IIR sheet overlying the container. Preferably the stripping occurs between photosensitive layers and an image-receiving layer of the IIR sheet. The IIR sheet has a discontinuous slit between the image-bearing portion and the non-image-bearing portion. The discontinuities constrain the two part webs against movement relative to one another after slitting. Such movement may be as a result of differential stretching during heat sealing.
REFERENCES:
patent: 2495111 (1950-01-01), Land
patent: 2500422 (1950-03-01), Land
patent: 2609296 (1952-09-01), Land
patent: 2669516 (1954-02-01), Land
Research Disclosure, vol. 176, Text No. 17622, Dec. 1978, Industrial Opportunities Ltd. of Homewell, Havant, England.
Dixon William C.
Eastman Kodak Company
Schilling Richard L.
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