Patent US4263000A successfully refreshed from Google Patents.
US4263000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of, and apparatus for photographically making positive pictures
Assignee: Agfa Gevaert AG
•
Filing: 1979-04-24
•
Granted: 1981-04-21
•
Expires: 1999-04-24
Abstract
Abstract The invention concerns a method of, and an apparatus for, photographically making positive pictures from individual frames of motion-picture films, film strips and microfilms. The image from a respective selected film frame is exposed onto a self-developing ("instant-picture") film sheet which is then developed to produce a positive paper picture of this image.
Inventors
- 👤 Otto Stemme
- 👤 Peter Lermann
- 👤 Volkmar Stenzenberger
- 👤 Werner Went
- 👤 Eberhard Herzig
- 👤 Friedrich-Ludolph Hoesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:10
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/326; G03B21/00; G03B21/134
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
An apparatus for making positive photographic pictures from individual film frames of motion-picture films and the like, comprising a rear-projection film projector having an objective which is slidable along its optical axis, a rear-projection screen, and a series of deflecting mirrors at least one of which is interposed between said objective and the screen to direct a light beam from the objective onto the screen; means for holding self-developing film sheets to be exposed, said at least one mirror being pivotable between one position in which it directs the light beam onto said screen and another position in which it directs the light beam onto the film sheet to be exposed; shutter means for controlling the exposure duration time; means coupling said at least one mirror and said objective so that the objective slides along said optical axis in response to pivoting of said mirror to said other position, so as to compensate for size differentials between the screen size and the film sheet size; and means for developing a respective exposed film sheet.
Claim 2
Independent Claim
174 words
An apparatus for making positive photographic pictures from individual film frames of motion-picture films and the like, comprising a rear-projection film projector having an objective which is slidable along its optical axis, a rear-projection screen, and a series of deflecting mirrors at least one of which is interposed between said objective and the screen to direct a light beam from the objective onto the screen; means for holding self-developing film sheets to be exposed, said at least one mirror being pivotable between one position in which it directs the light beam onto said screen and another position in which it directs the light beam onto the film sheet to be exposed; shutter means for controlling the exposure duration time; means coupling said at least one mirror and said objective so that the objective slides along said optical axis in response to pivoting of said mirror to said other position, so as to compensate for size differentials between the screen size and the film sheet size; and means for developing a respective exposed film sheet.
Claim 3
Dependent Claim
38 words
Apparatus as defined in claim 1; and further comprising means connecting said at least one mirror with said shutter means and operative to cock the shutter in response to pivoting of said one mirror to said other position.
Claim 4
Dependent Claim
52 words
Apparatus as defined in claim 2, said shutter means further comprising a light-blocking closure in front of film sheets held by said holding means; and means coupling said one closure with said mirror and operative to open the closure in response to pivoting of said one mirror to said other position. PG,19
Claim 5
Dependent Claim
31 words
Apparatus as defined in claim 1; and further comprising a color correcting filter mounted for selective movement into and out of the exposure light path which extends to said holding means.
References Cited (Backward Citations)
US3065667A
Cited
US2930304A
Cited
US3040640A
Cited
US3509807A
Cited
US3642367A
Cited
US4082446A
Cited
US4184763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |