US4050808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive color printing method and apparatus
Assignee: RANK CALIFORNIA Inc A CORP OF
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Filing: 1976-07-09
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Granted: 1977-09-27
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Expires: 1996-07-09
Abstract
Abstract Illumination for printing, including that reflected from a color negative, is sensed as to spectral content by a plurality of light-responsive sensors of mutually-exclusive spectral characteristics. That response is employed to control the spectral characteristic of the illumination for printing, as may be desired. The illumination for printing is homogeneously integrated as to intensity and spectral content prior to impinging upon the color negative by a hollow housing having both specularly and non-specularly reflective surfaces.
Inventors
- 👤 Robert Paul Gyori
- 👤 Thomas Tullio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
The method of additive color printing which includes the steps of; a. illuminating the color negative to be printed with integrated light of a preselected spectral character that is adjustable, b. separately accepting plural portions of said light according to mutually-exclusive spectral characteristics with the particular said color negative to be printed in place, and including light reflected only therefrom, c. reintegrating the combined light, and d. automatically adjusting the spectral characteristic of the light illuminating said color negative according to each said mutually-exclusive spectral portion to retain the preselected color printing spectral characteristic.
Claim 2
Independent Claim
94 words
The method of additive color printing which includes the steps of; a. illuminating the color negative to be printed with integrated light of a preselected spectral character that is adjustable, b. separately accepting plural portions of said light according to mutually-exclusive spectral characteristics with the particular said color negative to be printed in place, and including light reflected only therefrom, c. reintegrating the combined light, and d. automatically adjusting the spectral characteristic of the light illuminating said color negative according to each said mutually-exclusive spectral portion to retain the preselected color printing spectral characteristic.
Claim 3
Dependent Claim
113 words
Light-emissive apparatus, comprising: a. a hollow housing (1) having a translucent transparency-receiving surface (7) and plural light sources (3, 4, 5, 6) of different spectral characteristics spaced from said surface, b. a specularly reflective surface (8, 9, 10, 11) within said housing adjacent to said translucent surface, c. a non-specularly reflective surface (14, 15, 16, 17, 18) within said housing adjacent to said light sources, d. plural light-responsive means (27, 28, 29) positioned adjacent to said translucent transparency-receiving surface, and e. control means (33) connected to said plural light-responsive means and to said plural light source for the respective individual control of the output of said plural light sources of different spectral characteristics.
Claim 4
Dependent Claim
113 words
Light-emissive apparatus, comprising: a. a hollow housing (1) having a translucent transparency-receiving surface (7) and plural light sources (3, 4, 5, 6) of different spectral characteristics spaced from said surface, b. a specularly reflective surface (8, 9, 10, 11) within said housing adjacent to said translucent surface, c. a non-specularly reflective surface (14, 15, 16, 17, 18) within said housing adjacent to said light sources, d. plural light-responsive means (27, 28, 29) positioned adjacent to said translucent transparency-receiving surface, and e. control means (33) connected to said plural light-responsive means and to said plural light source for the respective individual control of the output of said plural light sources of different spectral characteristics.
Claim 5
Dependent Claim
44 words
The apparatus of claim 2, in which: a. the extent of said non-specularly reflective surface in the direction away from said translucent surface is substantially equal to the extent of said specularly reflective surface, successively, also in the direction away from said translucent surface.
Claim 6
Dependent Claim
29 words
The apparatus of claim 2, in which: a. said hollow housing has an approximately cubical shape, and b. said transparency-receiving surface comprises approximately the sixth side of the cube.
Claim 7
Dependent Claim
39 words
The apparatus of claim 2, in which; a. said light sources are four in number, and b. one light source is disposed on each one of the four sides of the cube, relatively far away from said transparency-receiving surface.
Claim 8
Dependent Claim
44 words
The apparatus of claim 5, in which; a. each said light source is comprised of, 1. an electric lamp, and 2. a color filter (21, 23, 21', 25) spaced from said lamp along the optical path of the light source into said hollow housing.
Claim 9
Dependent Claim
16 words
The apparatus of claim 6, in which; a. each said electric lamp is an incandescent lamp.
Claim 10
Dependent Claim
34 words
The apparatus of claim 2, in which; a. said plural light-responsive means (27, 28, 29) are three in number, and b. said plural light-responsive means are disposed upon one side of said hollow housing.
Claim 11
Dependent Claim
43 words
The apparatus of claim 8 in which each of said plural light-responsive means is composed of: a. a color filter (32) of unique spectral characteristic adjacent to the side of said hollow housing, and b. a solid-state light-responsive element behind said color filter.
Claim 12
Dependent Claim
21 words
The apparatus of claim 2, in which; a. said non-specularly reflective surface is a magnesium flash over a stipple surface paint.
Claim 13
Dependent Claim
29 words
The apparatus of claim 2, which additionally includes; a. an outer housing (2) having means (3', 4', 5', 6') for mounting said plural light sources (3, 4, 5, 6).
Claim 14
Dependent Claim
53 words
The apparatus of claim 2, in which said control means (33) is comprised of; a. plural separate electric power sources (43, 44, 45) individually connected to said plural light sources, and b. plural separate control circuits (46, 47, 48) individually connected to said plural light-responsive means and to said plural electric power sources.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |