US3717975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for correcting printing errors
Assignee: Individual
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Filing: 1971-07-02
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Granted: 1973-02-27
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Expires: 1991-07-02
Abstract
Abstract This invention relates to a photo correction apparatus that employs a light chamber and a pair of slidable masks with a light in the base of the chamber to facilitate the registration of a print having need of corrections with a film having the needed corrections thereon. The slidable masks are so positioned as to allow the exposure of selected correct lines on the original, while obliterating the incorrect lines. The apparatus may then have a film print with corrections thereon positioned in registration over the then partially exposed film to allow the slidable masks to be moved to position corrected portions of the film, which are then in turn exposed to a light source so that the finished fully exposed film is corrected. The apparatus also includes a safety light that is housed in the light chamber, which light source has a color that will not expose the film to be exposed to the exposure light source. This aids the user in determining whether registration has been maintained.
Inventors
- 👤 D Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/18; G03B27/20; B; B41; B41B; B41B23/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A photoprint correction apparatus, said apparatus including, a. a light chamber having an internal surface which has a light source secured thereto, and means to control said light source externally thereof, b. a chamber covering means having positioned thereon a pair of guides mounted and having positioned thereon slidable mask means, c. said chamber covering means having a translucent material integral with an opening in said chamber covering means, said slidable mask means positioned between said guides so that said slidable mask means may be moved relative to each other to thereby mask specified portions of said translucent material, said slidable mask means is free to slide in a direction parallel to said pair of guides while simultaneously having the capacity to pivotally move through an angle while said slidable mask is moving parallel to said guides to thereby allow said masks to move relative to a printed line on a layer of film which has been placed on said translucent material, d. said covering means having mounted thereon an adjustable exposure light source provided to illuminate portions of said translucent material not covered by said slidable mask means.
Claim 2
Dependent Claim
189 words
A photoprint correction apparatus, said apparatus including, a. a light chamber having an internal surface which has a light source secured thereto, and means to control said light source externally thereof, b. a chamber covering means having positioned thereon a pair of guides mounted and having positioned thereon slidable mask means, c. said chamber covering means having a translucent material integral with an opening in said chamber covering means, said slidable mask means positioned between said guides so that said slidable mask means may be moved relative to each other to thereby mask specified portions of said translucent material, said slidable mask means is free to slide in a direction parallel to said pair of guides while simultaneously having the capacity to pivotally move through an angle while said slidable mask is moving parallel to said guides to thereby allow said masks to move relative to a printed line on a layer of film which has been placed on said translucent material, d. said covering means having mounted thereon an adjustable exposure light source provided to illuminate portions of said translucent material not covered by said slidable mask means.
Claim 3
Dependent Claim
37 words
The photoprint correction apparatus of claim 1, wherein said guides are parallel to each other. 3. The photoprint correction apparatus of claim 1, wherein the light chamber light source has a pair of lights of different colors.
Claim 4
Dependent Claim
15 words
The photoprint correction apparatus of claim 1, wherein said translucent material is a frosted plexiglass.
Claim 5
Dependent Claim
31 words
The photoprint correction device of claim 1, wherein said adjustable exposure light is both pivotally and slidably adjustable to said layer of film which has been placed on said translucent material.
Claim 6
Dependent Claim
63 words
The photoprint correction device of claim 1, wherein said translucent material has internally thereof openings the length of said translucent material, said translucent material having grooves in connection therewith and a vacuum source connected to said openings and controllable to apply a vacuum to said grooves via said openings to thereby ensure that materials on said translucent material are securely held in place.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |