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US3751161A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic image transfer apparatus

Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1972-03-15
•
Granted: 1973-08-07
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Expires: 1992-03-15
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Abstract

Abstract Processes and apparatus for producing an image and systems for practicing these processes comprising (1) exposing a copy medium comprising a photosenstive photoconductor to thereby activate the exposed portions thereof, (2) contacting this medium with imageforming materials which undergo an oxidation-reduction type reaction when contacted with the activated portions of the copy medium to thereby deposit on these portions an image which differs in solubility from the unreacted image-forming materials in the non-exposed portions of the copy medium, and (3) contacting this copy medium with an image receiving medium in the presence of a solvent for the unreacted image-forming materials whereby the image-forming materials in the unexposed portions of the copy medium are transferred to the image-receiving medium to thereby establish a positive image-pattern in the image-receiving medium.

Inventors

  • 👤 E Berman
  • 👤 C Ekman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 04:28
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 13 words
The apparatus of claim 1 wherein said radiation sensitive material comprises a photoconductor.
Claim 2
Dependent Claim 20 words
The apparatus of claim 1 wherein said photoconductor is reversibly activatable and substantially chemically unchanged upon exposure to activating radiation.
Claim 3
Dependent Claim 29 words
The apparatus of claim 1 wherein said image receiving medium comprises a radiation sensitive photoconductive material which is reversibly activatable and substantially chemically unchanged upon exposure to activating radiation.
Claim 4
Dependent Claim 24 words
The apparaTus of claim 1 wherein said image storage medium comprises a radiation sensitive metal oxide or silver halide as the photosensitive component thereof.
Claim 5
Dependent Claim 28 words
The apparatus of claim 1 wherein said image storage medium comprises a radiation sensitive titanium dioxide, zinc oxide, silver chloride or silver bromide as the photosensitive component thereof.
Claim 6
Dependent Claim 34 words
The apparatus of claim 1 wherein the image forming materials comprise a solution of metal ions capable of being reduced to the free metal when contacted with activated portions of said image storage medium.
Claim 7
Dependent Claim 19 words
The apparatus of claim 7 wherein said image forming materials comprise a water soluble, reducible metal compound of silver.
Claim 8
Dependent Claim 24 words
The apparatus of claim 7 wherein said image forming materials comprise a water soluble, reducible metal compound of mercury, nickel, tin, copper or gold.
Claim 9
Independent Claim 140 words
An apparatus for producing an image in an image storage medium composed of a substrate and a photosensitive material selected from at least one member of the group consisting of titanium dioxide, zinc oxide and silver halide to thereby establish gradients of differential chemical reactivity in the medium conforming to the exposure applied thereto comprising: a. a means for exposing said image storage medium; b. a means for contacting the medium with image-forming materials comprising a solution of solvent soluble metal compounds capable of selectively reacting with exposed portions of the medium to form a metal image; and c. a means for contacting the image-storage medium with an image receiving medium, whereby the image forming materials in the unexposed portions of the image-storage medium are transferred to the image-receiving medium to thereby establish an image pattern in the image-receiving medium.
Claim 10
Dependent Claim 40 words
The apparatus of claim 10 wherein the solution of solvent soluble metal compounds comprises a metal compound of silver and whereby the apparatus additionally comprises means for contacting the metal image formed by means b with a suitable reducing agent.

References Cited (Backward Citations)

US2596756A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-06 1977-02-05 1977-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-06 1981-02-05 1981-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-06 1985-02-05 1985-08-07 $7700.00 Window Closed / Lapsed

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