Patent US4518845A successfully refreshed from Google Patents.
US4518845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for processing thermally developable films and papers
Assignee: Eastman Kodak Co
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Filing: 1982-11-03
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Granted: 1985-05-21
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Expires: 2002-11-03
Abstract
Abstract A device for high quality development of latent image on a strip of heat developable paper or film. The devices includes a heat conductive member which affords conduction of a uniform predetermined quantity of heat to all areas of the paper. The heat conductive member includes means to vent moisture from the paper to the atmosphere during the development process, to aid in bringing about uniform development of the paper or film. The heat conductive member may further include means to provide uniform pressure to the film or paper during the development process.
Inventors
- 👤 John A. Svendsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:43
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
156 words
Device for thermally developing papers and films which are developable by heat comprising: (a) a heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member comprising a plurality of independently moveable, elongated, bar-shaped heat conductive elements arranged in an arcuate array about said zone so that spaces exist between said elements, (b) pressure applying means for pressing said papers and films against said heat conductive member, (c) means for preventing rotational movement of said heat conductive member, (d) means for heating said heat conductive elements, and (e) means for resiliantly biasing said heating means and said elements toward and into contact with said papers and films which are moved through said zone, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said spaces to restrict uneven development within said zone.
Claim 2
Dependent Claim
156 words
Device for thermally developing papers and films which are developable by heat comprising: (a) a heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member comprising a plurality of independently moveable, elongated, bar-shaped heat conductive elements arranged in an arcuate array about said zone so that spaces exist between said elements, (b) pressure applying means for pressing said papers and films against said heat conductive member, (c) means for preventing rotational movement of said heat conductive member, (d) means for heating said heat conductive elements, and (e) means for resiliantly biasing said heating means and said elements toward and into contact with said papers and films which are moved through said zone, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said spaces to restrict uneven development within said zone.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein said heat conductive member is in the configuration of a shoe.
Claim 4
Dependent Claim
18 words
The device of claim 1 wherein said heat conductive member is essentially in the configuration of a drum.
Claim 5
Dependent Claim
17 words
The device of claim 1 wherein said heat conductive member is in the configuration of a platen.
Claim 6
Dependent Claim
21 words
The device of claim 1 wherein said elements have their major dimension essentially parallel to the axis of the heating zone.
Claim 7
Dependent Claim
14 words
The device of claim 1 wherein the leading edge of each element is bevelled.
Claim 8
Dependent Claim
186 words
Apparatus for preparing images by imagewise exposure by actinic radiation of a photothermographic film or paper and subsequent thermal development comprising (a) a means for providing a latent image by exposure to actinic radiation in combination with (b) a device for thermally developing papers and films which are developable by heat comprising (1) a unitary heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member having means within said heating zone to allow removal of moisture vapor from the surface of said papers and films, said moisture vapor removal means comprising a plurality of elongated slots that are parallel to the axis of said heat conductive member, (2) pressure applying means for pressing said papers and films against said heat conductive member, (3) means for preventing rotational movement of said heat conductive member, and (4) means for heating said heat conductive member, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said slots to restrict uneven development within said zone.
Claim 9
Dependent Claim
186 words
Apparatus for preparing images by imagewise exposure by actinic radiation of a photothermographic film or paper and subsequent thermal development comprising (a) a means for providing a latent image by exposure to actinic radiation in combination with (b) a device for thermally developing papers and films which are developable by heat comprising (1) a unitary heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member having means within said heating zone to allow removal of moisture vapor from the surface of said papers and films, said moisture vapor removal means comprising a plurality of elongated slots that are parallel to the axis of said heat conductive member, (2) pressure applying means for pressing said papers and films against said heat conductive member, (3) means for preventing rotational movement of said heat conductive member, and (4) means for heating said heat conductive member, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said slots to restrict uneven development within said zone.
Claim 10
Dependent Claim
195 words
Apparatus for preparing images by imagewise exposure by actinic radiation of a photothermographic film or paper and subsequent thermal development comprising (a) a means for providing a latent image by exposure to actinic radiation in combination with (b) a device for thermally developing papers and films which are developable by heat comprising (1) a heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member comprising a plurality of independently moveable, elongated, bar-shaped heat conductive elements arranged in an arcuate array about said zone so that spaces exist between said elements, (2) pressure applying means for pressing said papers and films against said heat conductive member, (3) means for preventing rotational movement of said heat conductive member, (4) means for heating said heat conductive elements, and (5) means for resiliantly biasing said heating means and said elements toward and into contact with said papers and films which are moved through said zone, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said spaces to restrict uneven development within said zone.
Claim 11
Dependent Claim
195 words
Apparatus for preparing images by imagewise exposure by actinic radiation of a photothermographic film or paper and subsequent thermal development comprising (a) a means for providing a latent image by exposure to actinic radiation in combination with (b) a device for thermally developing papers and films which are developable by heat comprising (1) a heat conductive member defining a partially-cylindrical heating zone through which said papers and films may be moved to effect development, said heat conductive member comprising a plurality of independently moveable, elongated, bar-shaped heat conductive elements arranged in an arcuate array about said zone so that spaces exist between said elements, (2) pressure applying means for pressing said papers and films against said heat conductive member, (3) means for preventing rotational movement of said heat conductive member, (4) means for heating said heat conductive elements, and (5) means for resiliantly biasing said heating means and said elements toward and into contact with said papers and films which are moved through said zone, whereby said papers and films are heated for development, and moisture vapor released from said papers and films may pass through said spaces to restrict uneven development within said zone.
References Cited (Backward Citations)
US2243579A
Cited
US3058244A
Cited
US3073038A
Cited
US3032811A
Cited
US3012141A
Cited
US3100252A
Cited
FR1354819A
Cited
US3177793A
Cited
US3242316A
Cited
US3230858A
Cited
US3394245A
Cited
FR1418155A
Cited
US3439905A
Cited
US3517164A
Cited
US3632984A
Cited
US3757662A
Cited
US3739143A
Cited
US3709472A
Cited
US3893245A
Cited
JPS5276929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |