US3765887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film assemblage for color diffusion transfer
Assignee: Polaroid Corp
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Filing: 1972-04-24
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Granted: 1973-10-16
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Expires: 1992-04-24
Abstract
Abstract A photographic film pack or magazine containing all of the materials and components required to produce a plurality of diffusion transfer process color reflection prints. The pack includes a plurality of diffusion transfer process color film units each comprising a photosenstive laminate including as essential layers, in order, a dimensionally stable transparent support layer, a layer adapted to receive a diffusion transfer process dye image-forming material diffusible thereto, an opaque layer, a photosensitive silver halide layer having an associated diffusion transfer process dye image-forming material; a transparent dimensionally stable support sheet superposed substantially coextensive with the surface of the laminate opposite the transparent support; and a rupturable container, filled with a liquid processing composition including an opacifying agent, secured to the exterior of the laminate and transparent sheet adjacent a leading edge of either or both the external transparent layer and sheet in position to discharge its liquid contents between the transparent sheet and the laminate by and in response to the application of compressive pressure to the container. The film pack also comprises a container including a forward wall formed with a light transmitting opening and holding a plurality of film units arranged in stacked relation with the transparent sheets facing the forward wall in position for exposure to light admitted by the opening, and an opening at one end through which exposed film units can be withdrawn, one at a time, to effect the processing thereof. The container also includes pressure-applying means associated with the withdrawal opening for discharging and spreading the liquid contents of the container of each exposed film unit as the latter is withdrawn from the film pack container. A dark slide with a leader projecting beyond the pressure-applying means is positioned between the exposure opening and the foremost film unit to prevent exposure thereof and is connected by a leader to the foremost film unit which, in turn, is connected to the next succeeding film unit, and so forth, to provide for withdrawal and processing of all film units.
Inventors
- 👤 H Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:10
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/44
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
26 words
A photographic film assemblage as defined in claim 1 wherein said opaque layer of said each film unit is adapted to reflect electromagnetic radiation incident thereon.
Claim 2
Dependent Claim
17 words
A photographic film assemblage as defined in claim 2 wherein said opaque reflecting layer comprises titanium dioxide.
Claim 3
Dependent Claim
21 words
A photographic film assemblage as defined in claim 3 wherein said opacifying agent included in said processing composition comprises carbon black.
Claim 4
Dependent Claim
56 words
A photographic film assemblage as defined in claim 1 wherein said photosensitive laminate of said each film unit contains at least two selectively sensitized silver halide layers each having associated therewith a dye image-forming material adapted to provide a dye image of predetermined color as a function of the photoexposure of its associated silver halide layer.
Claim 5
Dependent Claim
75 words
A photographic film assemblage as defined in claim 5 wherein each of said selectively sensitized silver halide layers of said each film unit possesses predominant spectral sensitivity to separate regions of the spectrum and said dye image-forming material associated with each of said silver halide layers is adapted to provide a dye transfer image possessing a spectral absorption range subsequent to processing substantially complementary to the predominant sensitiviTy range of its associated silver halide layer.
Claim 6
Dependent Claim
71 words
A photographic film assemblage as defined in claim 6 wherein said processing composition comprises an aqueous alkaline processing composition and said color film units each include means for converting the pH of said processing composition, subsequent to substantial diffusion of said dye image-forming material to said receiving layer, from the initial pH to a second pH at which the dye transfer image provided by said dye image-forming materials exhibits increased stability.
Claim 7
Dependent Claim
69 words
A photographic film assemblage as defined in claim 7 wherein said photosensitive laminate includes, as essential layers, a red-sensitive silver halide emulsion layer having associated therewith a diffusion transfer process cyan dye image-forming material, a green-sensitive silver halide emulsion layer having associated therewith a diffusion transfer process magenta dye image-forming material and a blue-sensitive silver halide emulsion layer having associated therewith a diffusion transfer process yellow dye image-forming material.
Claim 8
Dependent Claim
65 words
A photographic film assemblage as defined in claim 8 wherein said opaque layer comprises a first alkaline processing composition permeable polymeric layer containing titanium dioxide, said each film unit further including, contiguous the surface of said titanium dioxide containing layer intermediate that layer and the surface of said laminate opposite said transparent support layer, a second alkaline processing composition permeable polymeric layer containing carbon black.
Claim 9
Dependent Claim
25 words
A photographic film assemblage as defined in claim 1 wherein said dimensionally stable sheet of said each film unit is laminated to said photosensitive laminate.
Claim 10
Dependent Claim
45 words
A photographic film assemblage as defined in claim 10 wherein said each film unit includes binding tape securing said laminate and said dimensionally stable sheet to one another along three margins thereof and securing said container of liquid to said laminate and dimensionally stable sheet.
Claim 11
Dependent Claim
44 words
A photographic film assemblage as defined in claim 11 including a reservoir within said each film unit for collecting and retaining excess processing liquid overrun beyond the trailing edge of color prints formed within said each film unit during processing thereof by said liquid.
Claim 12
Dependent Claim
48 words
A photographic film assemblage as defined in claim 1 further including a spring for urging said film unit forwardly to support the forwardmost film unit against said forward wall in position for exposure and said convergent passage is aligned with the leading end of the forwardmost film unit.
Claim 13
Dependent Claim
48 words
A photographic film assemblage as defined in claim 1 further including a restraining member permitting withdrawal of the forwardmost film unit following exposure thereof and engaging and restraining the next succeeding film unit against movement through said passage in response to frictional engagement with the forwardmost film unit.
Claim 14
Dependent Claim
49 words
A photographic film assemblage as defined in claim 14 wherein said restraining member comprises a resilient projection extending from an edge of the withdrawal opening forwardly across said opening into the path of movement of said forwardmost film unit and adapted to be deflected thereby to permit movement thereof.
Claim 15
Dependent Claim
41 words
A photographic film assemblage as defined in claim 1 wherein said juxtaposed pressure-applying members are formed of resilient sheet material shaped to form relatively rigid pressure-applying members resistent to bending and supporting said members for limited movement apart from one another.
Claim 16
Dependent Claim
71 words
A photographic film assemblage as defined in claim 1 wherein a leader sheet is attached to each of said film units near the leading end thereof and is adapted to be moved through said passage by and in response to movement of another component of said film assemblage through said passage to provide a section of said leader sheet engageable exterior of said passage for withdrawing said each film unit therethrough.
Claim 17
Dependent Claim
75 words
A photographic film asseMblage as defined in claim 17 further including a cover element formed of an actinic light-opaque sheet material located between the forwardmost film unit and said forward wall for preventing admission of light through said light transmitting section to said film units and a leader attached to said cover element extending from said assemblage through said passage and engageable exterior of said film assemblage for withdrawing said cover element through said passage.
Claim 18
Dependent Claim
43 words
A photographic film assemblage as defined in claim 18 wherein the leader sheet of the forwardmost film unit is detachably coupled with said cover element for withdrawing said leader sheet through said passage by and in response to withdrawal of said cover element.
Claim 19
Dependent Claim
307 words
A photographic film assemblage adapted to produce a plurality of diffusion transfer color prints comprising, in combination: a container insertable in and removable from a photographic exposure apparatus for enclosing a plurality of film units arranged in stacked relation and including a forward wall having a light-transmitting section to permit exposure of the forwardmost film unit, and a withdrawal opening permitting withdrawal of said forwardmost film unit following exposure thereof within said container; a plurality of diffusion transfer process color film units each including leading and trailing ends and comprising: a. a photosensitive laminate containing as essential layers and in order, a dimensionally stable transparent support layer, a layer adapted to receive a diffusion transfer process dye image-forming material diffusing thereto, an opaque layer, and a photosensitive silver halide layer having associated therewith a diffusion transfer process dye image-forming material; b. a transparent dimensionally stable sheet secured in superposition and substantially coextensive with the surface of the photosensitive laminate opposite said transparent support layer; and c. a rupturable container of a liquid processing composition including an opacifying agent positioned at said leading end of said film unit and adapted in response to the application of compressive pressure to the container to discharge its contents intermediate said dimensionally stable sheet and said photosensitive laminate; said film units being arranged in stacked relation within said container with the trans-parent dimensionally stable sheets facing said forward wall and aligned with said light-transmitting section and said rupturable containers located adjacent said withdrawal opening; and a pair of juxtaposed pressure-applying members associated with said withdrawal opening providing a passage through which said film units are withdrawn and adapted to apply compressive force to said rupturable container to effect unidirectional discharge of the container''s contents intermediate said dimensionally stable sheet and said photosensitive laminate upon transit of said film units through said passage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |