US4814827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color proofing apparatus
Assignee: Kodak Graphics Holding Inc
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Filing: 1987-08-13
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Granted: 1989-03-21
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Expires: 2007-08-13
Abstract
Abstract A radiation-sensitive element for half tone color proofing adapted to be exposed by scanning with four independently modulated sources of radiation emitting at different wavelengths within the range 550 to 900 nm, the element comprising a substrate bearing at least four separate imaging media coated thereon, said imaging media including: (1) an imaging medium capable of forming a yellow image upon imagewise exposure and processing, (2) an imaging medium capable of forming a magenta image upon imagewise exposure and processing, (3) an imaging medium capable of forming a cyan image upon imagewise exposure and processing, and (4) an imaging medium capable of forming a black or a balancing black image upon imagewise exposure and processing, each imaging medium having a maximum spectral sensitivity at a wavelength different from that of the maximum sensitivity of the other imaging media such that after exposure and processing super-imposed yellow, magenta, cyan and black or balancing black images are formed, each image being attributable to the imagewise exposure of the respective source. Three layer elements of forming yellow, magenta and cyan images may be used for preparing half-tone full color images. Exposure apparatus comprising at least three independently modulated sources, preferably semiconductor sources emitting in the region of 550 to 900 nm may be used for imaging.
Inventors
- 👤 Jonathan P. Kitchin
- 👤 Stephen R. Powers
- 👤 Keith A. Penfound
- 👤 Peter J. Finn
- 👤 Michael G. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C1/00; G03C1/494; G03C1/498; G03C1/49881; G03C7/00; G03C7/28; G03C7/30; G03C7/3041; G03F; G03F3/00; G03F3/10; G03F3/107; H; H04; H04N; H04N1/00; H04N1/46; H04N1/50; H04N1/502
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
111 words
Exposure apparatus comprising at least three independent sources of radiation of different wavelengths, each having a peak emission within the wavelength range of 550 to 900 nm, the intensity of said sources at the intended exposure plane of a radiation-sensitive element increasing from the source of shortest wavelength to the source of longest wavelength such that the source of the longest wavelength has an intensity of at least 10 times greater than the source of the shortest wavelength, the exposure apparatus being constructed and arranged such that each source or its emission may be modulated and the emitted radiation from said sources may in a single pass expose a radiation-sensitive element.
Claim 2
Dependent Claim
111 words
Exposure apparatus comprising at least three independent sources of radiation of different wavelengths, each having a peak emission within the wavelength range of 550 to 900 nm, the intensity of said sources at the intended exposure plane of a radiation-sensitive element increasing from the source of shortest wavelength to the source of longest wavelength such that the source of the longest wavelength has an intensity of at least 10 times greater than the source of the shortest wavelength, the exposure apparatus being constructed and arranged such that each source or its emission may be modulated and the emitted radiation from said sources may in a single pass expose a radiation-sensitive element.
Claim 3
Dependent Claim
17 words
Exposure apparatus as claimed in claim 1, which causes four independent sources of radiation of different wavelengths.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 1 in which the wavelengths of peak emission of any two sources of different wavelengths differ by at least 20 nm.
Claim 5
Dependent Claim
14 words
Apparatus as claimed in claim 1 in which each source is a semiconductor source.
Claim 6
Dependent Claim
23 words
Apparatus as claimed in claim 4 in which each source is selected from light emitting diodes, infra-red emitting diodes, and laser emitting diodes.
Claim 7
Dependent Claim
20 words
Apparatus as claimed in claim 1 which comprises a plurality of independent modulated sources at each of the different wavelengths.
Claim 8
Dependent Claim
34 words
Apparatus as claimed in claim 6 in which said plurality of independently modulated sources at each wavelength are arranged as a single line, or adjacent sources, or two or more staggered lines of sources.
Claim 9
Dependent Claim
18 words
Apparatus as claimed in claim 7 in which all of said sources are mounted on a single chip.
Claim 10
Dependent Claim
26 words
Apparatus as claimed in claim 2 in which the wavelengths of peak emission of any two sources of different wavelengths differ by at least 20 nm.
Claim 11
Dependent Claim
14 words
Apparatus as claimed in claim 2 in which each source is a semi-conductor source.
Claim 12
Dependent Claim
14 words
Apparatus as claimed in claim 3 in which each source is a semi-conductor source.
Claim 13
Dependent Claim
20 words
Apparatus as claim in claim 2 which comprises a plurality of independent modulated sources at each of the different wavelengths.
Claim 14
Dependent Claim
20 words
Apparatus as claim in claim 3 which comprises a plurality of independent modulated sources at each of the different wavelengths.
Claim 15
Dependent Claim
20 words
Apparatus as claim in claim 4 which comprises a plurality of independent modulated sources at each of the different wavelengths.
Claim 16
Dependent Claim
20 words
Apparatus as claim in claim 5 which comprises a plurality of independent modulated sources at each of the different wavelengths.
Claim 17
Dependent Claim
33 words
Apparatus as claimed in claim 2 in which said plurality of independently modulated sources at each wavelength are arranged as a single line, adjacent sources, or two or more staggered lines of sources.
Claim 18
Dependent Claim
33 words
Apparatus as claimed in claim 9 in which said plurality of independently modulated sources at each wavelength are arranged as a single line, adjacent sources, or two or more staggered lines of sources.
Claim 19
Dependent Claim
33 words
Apparatus as claimed in claim 11 in which said plurality of independently modulated sources at each wavelength are arranged as a single line, adjacent sources, or two or more staggered lines of sources.
Claim 20
Dependent Claim
111 words
Exposure apparatus comprising at least three independent sources of radiation of different wavelengths, each having a peak emission within the wavelength range of 550 to 900 nm, the intensity of said sources at the exposure plane of a radiation-sensitive element increasing from the source of shortest wavelength to the source of longest wavelength such that the source of the longest wavelength has an intensity at least 10 times greater than the source of the shortest wavelength, the exposure apparatus being constructed so that each source or its emission may be modulated and the emitted radiation from said sources may in a single pass expose a radiation-sensitive element through the exposure plane.
Claim 21
Dependent Claim
111 words
Exposure apparatus comprising at least three independent sources of radiation of different wavelengths, each having a peak emission within the wavelength range of 550 to 900 nm, the intensity of said sources at the exposure plane of a radiation-sensitive element increasing from the source of shortest wavelength to the source of longest wavelength such that the source of the longest wavelength has an intensity at least 10 times greater than the source of the shortest wavelength, the exposure apparatus being constructed so that each source or its emission may be modulated and the emitted radiation from said sources may in a single pass expose a radiation-sensitive element through the exposure plane.
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |