US3734611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic printing apparatus
Assignee: Agfa Gevaert AG
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Filing: 1971-09-27
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Granted: 1973-05-22
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Expires: 1991-09-27
Abstract
Abstract The average transparency over substantially the complete surface of each negative of a film strip is measured and negatives whose so-measured transparency lies outside a predetermined range are transported past the printer without being reproduced.
Inventors
- 👤 W Knapp
- 👤 V Weinert
- 👤 K Ramsauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:31
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/80
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
Photographic apparatus, comprising, in combination, elongated carrier means having a plurality of originals; transport means transporting said elongated carrier means in a predetermined path; reproducing means positioned along said predetermined path; photoelectric means positioned at a measuring location prior to said reproducing means along said predetermined path in the direction of motion of said elongated carrier means, for measuring the average transparency of at least a substantial part of each of said originals and furnishing corresponding transparency signals; comparator means comparing each of said transparency signals wit a reference signal and furnishing a comparator output signal when said transparency signal has a predetermined relationship to said reference signal; and control means interconnected between said comparator means and said transport means, for operating said transport means to move the corresponding one of said originals past said reproducing means without exposure in response to said comparator output signal.
Claim 2
Dependent Claim
146 words
Photographic apparatus, comprising, in combination, elongated carrier means having a plurality of originals; transport means transporting said elongated carrier means in a predetermined path; reproducing means positioned along said predetermined path; photoelectric means positioned at a measuring location prior to said reproducing means along said predetermined path in the direction of motion of said elongated carrier means, for measuring the average transparency of at least a substantial part of each of said originals and furnishing corresponding transparency signals; comparator means comparing each of said transparency signals wit a reference signal and furnishing a comparator output signal when said transparency signal has a predetermined relationship to said reference signal; and control means interconnected between said comparator means and said transport means, for operating said transport means to move the corresponding one of said originals past said reproducing means without exposure in response to said comparator output signal.
Claim 3
Dependent Claim
72 words
Apparatus as set forth in claim 1, wherein said elongated carrier means comprise a plurality of identifying marks each positioned in a predetermined location relative to a corresponding one of said originals; sensing means sensing said identifying marks and furnishing corresponding first marking signals; and wherein said transport means comprise step-wise transport means transporting an original into operative proximity with said reproducing means in response to each of said first marking signals.
Claim 4
Dependent Claim
66 words
Apparatus as set forth in claim 2, wherein said comparator means comprise first comparator means comparing said transparency signal to a first reference signal signifying a predetermined maximum transparency; second comparator means comparing said transparency signal to a second reference signal corresponding to a predetermined minimum transparency; and wherein said comparator output signal signifies a transparency exceeding said maximum transparency or less than said minimum transparency.
Claim 5
Dependent Claim
26 words
Apparatus as set forth in claim 3, wherein said photoelectric means comprise a photoelectric cell having a surface substantially corresponding to the surface of said originals.
Claim 6
Dependent Claim
35 words
Apparatus as set forth in claim 4, wherein said photoelectric means further comprise mounting means mounting said photoelectric cell above said elongated signal carrier means, and illuminating means positioned under said elongated signal carrier means.
Claim 7
Dependent Claim
24 words
Apparatus as set forth in claim 5, wherein said mounting means comprise means rotatably mounting said photocell; thereby permitting visual inspection of said original.
Claim 8
Dependent Claim
88 words
Apparatus as set forth in claim 3, wherein said first comparator means has a positive input receiving said transparency signal and a negative input receiving said first reference signal; wherein said second comparator means has a negative input receiving said transparency signal and a positive input receiving said second reference signal; wherein said first and second comparator have, respectively, a first and second comparator output; further comprising OR-gate means having a first and second input respectively connected to said first and second comparator output, and an OR-gate output.
Claim 9
Dependent Claim
16 words
Apparatus as set forth in claim 7, further comprising indicator means connected to said OR-gate output.
Claim 10
Dependent Claim
38 words
Apparatus as set forth in claim 8, wherein said indicator means comprise first transistor means having a base connected to said OR-gate output and an emitter; and an indicator lamp connected to said emitter of said first transistor.
Claim 11
Dependent Claim
82 words
Apparatus as set forth in claim 7, further comprising second sensing means positioned at said measuring location, for sensing said identifying marks and furnishing second sensing signals in response thereto; further comprising AND-gate means having a first input connected to said second sensing means, a second input connected to said OR-gate output, and an AND-gate output; and switch means interconnected between said AND-gate mans and said transport means for energizing said transport means in response to a signal at said AND-gate output.
Claim 12
Dependent Claim
24 words
Apparatus as set forth in claim 1, further comprising additional indicator means connected to said photoelectric means for furnishing an indication of said transparency.
Claim 13
Dependent Claim
18 words
Apparatus as set forth in claim 11, wherein said additional indicator means comprise suppressed center range indicator means.
References Cited (Backward Citations)
US3426357A
Cited
US3519347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |