Patent US3829871A successfully refreshed from Google Patents.
US3829871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus
Assignee: Polaroid Corp
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Filing: 1973-07-02
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Granted: 1974-08-13
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Expires: 1993-07-02
Abstract
Abstract Photographic apparatus for use with a film unit of the selfdeveloping type including a chamber for locating a film unit in position for exposure and a pair of rollers mounted adjacent a leading edge of a film unit located in the exposure position. The rollers are adapted to define a longitudinally extending gap which defines an acute angle with the leading edge of the film unit located in the exposure position. Structure is provided for canting the film unit as it is advanced from the exposure position, subsequent to exposure, toward the rollers such that the leading edge of the exposed film unit is parallel with the longitudinally extending gap as the film unit enters the gap.
Inventors
- 👤 N Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:10
CPC Classifications
G; G03; G03D; G03D9/00; G03D9/02; G03B; G03B17/00; G03B17/28; G03B17/32; G03B17/34; G03B17/48; G03B17/50; G03B17/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
Photographic apparatus for use with a film unit having leading and traIling edges separated by a substantially rectangular viewing area comprising: means for locating the film unit in position for exposure; a pair of rollers adapted to define a longitudinally extending gap through which the film unit is adapted to be advanced, subsequent to exposure, to spread a processing composition across a photosensitive layer of the film unit; means for mounting said rollers with said longitudinally extending gap and the leading edge of the film unit in said exposure position defining an acute angle therebetween; and means for canting the film unit as it is advanced from said exposure position toward said rollers such that the leading edge of the film unit is parallel with said longitudinally extending gap as the film unit moves into said gap whereby the processing composition is spread over an area coextensive with the viewing area.
Claim 2
Dependent Claim
151 words
Photographic apparatus for use with a film unit having leading and traIling edges separated by a substantially rectangular viewing area comprising: means for locating the film unit in position for exposure; a pair of rollers adapted to define a longitudinally extending gap through which the film unit is adapted to be advanced, subsequent to exposure, to spread a processing composition across a photosensitive layer of the film unit; means for mounting said rollers with said longitudinally extending gap and the leading edge of the film unit in said exposure position defining an acute angle therebetween; and means for canting the film unit as it is advanced from said exposure position toward said rollers such that the leading edge of the film unit is parallel with said longitudinally extending gap as the film unit moves into said gap whereby the processing composition is spread over an area coextensive with the viewing area.
Claim 3
Dependent Claim
40 words
Photographic apparatus as defined in claim 1 further including means for mounting said canting means in position to engage the film unit by the trailing edge and move it out of said exposure position and into engagement with said rollers.
Claim 4
Dependent Claim
42 words
Photographic apparatus as defined in claim 2 further including drive means operatively coupled to one of said rollers and said canting means whereby said one roller is rotating when said canting means moves the film unit into engagement with said one roller.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |