US3990898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-process color balance adjustment of photographic film using filter dyes
Assignee: Polaroid Corp
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Filing: 1974-06-26
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Granted: 1976-11-09
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Expires: 1994-06-26
Abstract
Abstract The color speeds of a multicolor photosensitive element are balanced during the manufacture thereof by continuously introducing into said element optical filter means adapted to modulate the photographic color speed of at least one of the selectively sensitized silver halide emulsions relative to the other(s), and then adjusting the density of said optical filter means during coating to an amount sufficient to obtain the desired color balance.
Inventors
- 👤 Edwin H. Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C1/00; G03C1/76; G03C1/825
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
206 words
A method for the in-process correction of the color balance of a diffusion transfer multicolor photosensitive element, said element comprising a support carrying on one surface a plurality of layers including at least two silver halide emulsions of different spectral sensitivities, each emulsion having an associated dye image-providing material, said method comprising the steps of: continuously coating on an elongated support at least two silver halide emulsions of different spectral sensitivities, each emulsion having an associated dye image-providing material; said coating of said photosensitive element including the coating of a substantially nondiffusible nonimage-forming optical filter dye adapted to modulate the photographic color speed of at least one of said silver halide emulsions relative to the color speed of said other emulsion to provide a color balance which is a function of the optical density of said filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting said color balance during said continued coating process by varying the coverage of said optical filter dye in response to the analysis of said sample by an amount sufficient to obtain a predetermined color balance.
Claim 2
Independent Claim
206 words
A method for the in-process correction of the color balance of a diffusion transfer multicolor photosensitive element, said element comprising a support carrying on one surface a plurality of layers including at least two silver halide emulsions of different spectral sensitivities, each emulsion having an associated dye image-providing material, said method comprising the steps of: continuously coating on an elongated support at least two silver halide emulsions of different spectral sensitivities, each emulsion having an associated dye image-providing material; said coating of said photosensitive element including the coating of a substantially nondiffusible nonimage-forming optical filter dye adapted to modulate the photographic color speed of at least one of said silver halide emulsions relative to the color speed of said other emulsion to provide a color balance which is a function of the optical density of said filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting said color balance during said continued coating process by varying the coverage of said optical filter dye in response to the analysis of said sample by an amount sufficient to obtain a predetermined color balance.
Claim 3
Dependent Claim
32 words
A method as defined in claim 1 wherein said optical filter dye exhibits spectral absorption maxima substantially coincoding with the sensitization maxima of the silver halide emulsion whose speed is modulated threby.
Claim 4
Dependent Claim
31 words
A method as defined in claim 2 wherein the coverage of said filter dye is varied while the coverages of said silver halide emulsions and dye image-providing materials remain relatively constant.
Claim 5
Dependent Claim
54 words
A method as defined in claim 1 wherein said photosensitive element comprises, in sequence, a redsensitive silver halide layer having associated therewith a cyan dye image-providing material, a green-sensitive silver halide layer having associated therewith a magenta dye image-providing material and a blue-sensitive silver halide layer having associated therewith a yellow dye image-providing material.
Claim 6
Dependent Claim
30 words
A method as defined in claim 4 wherein a cyan filter dye is introduced into a layer overlying said red-sensitive silver halide emulsion to modulate at least the red speed.
Claim 7
Dependent Claim
25 words
A method as defined in claim 5 wherein said cyan dye is introduced into a layer intermediate said red-sensitive and green-sensitive silver halide emulsion layers.
Claim 8
Dependent Claim
28 words
A method as defined in claim 4 wherein a cyan filter dye is introduced into said red-sensitive silver halide emulsion layer to modulate at least the red speed.
Claim 9
Dependent Claim
30 words
A method as defined in claim 4 wherein a yellow filter dye is introduced into a layer overlying said blue-sensitive silver halide emulsion to modulate at least the blue speed.
Claim 10
Dependent Claim
47 words
A method as defined in claim 4 wherein a cyan filter dye is introduced into a location overlying said red-senstive silver halide and a yellow filter dye is introduced into a location overlying said blue-sensitive silver halide, thereby modulating at least both red and blue speeds simultaneously.
Claim 11
Dependent Claim
32 words
A method as defined in claim 4 wherein said cyan, magenta and yellow dye image-providing materials are dye developers contained in separate layers respectively underlying said red-sensitive, green-sensitive and blue-sensitive emulsion layers.
Claim 12
Dependent Claim
31 words
A method as defined in claim 10 wherein said filter dye is essentially the dye moiety of the dye developer associated with the silver halide emulsion whose speed is modulated thereby.
Claim 13
Dependent Claim
19 words
A method as defined in claim 10 wherein copper phthalocyanine dye is introduced iinto said magenta dye developer layer.
Claim 14
Dependent Claim
19 words
A method as defined in claim 10 wherein copper phthalocyanine dye is introduced into said redsensitive silver halide layer.
Claim 15
Dependent Claim
22 words
A method as defined in claim 10 wherein Benzidine Yellow dye is introduced into a layer overlying said blue-sensitive silver halide layer.
Claim 16
Independent Claim
225 words
A method for the in-process correction of the color balance of a multicolor diffusion transfer photosensitive element comprising a support carrying on one surface a plurality of layers including, in sequence, a red-sensitive silver halide emulsion layer having a cyan dye developer associated therewith, a green-sensitive silver halide emulsion layer having a magenta dye developer associated therewith, said blue-sensitive silver halide emulsion layer having a yellow dye developer associated therewith; said method comprising the steps of: continuously coating on an elongated support said silver haliide emulsions; the coating of said photosensitive element including the coating of a quantity of a substantially nondiffusible, nonimage-forming optical filter dye exhibiting spectral absorption maxima substantially coinciding with the sensitization maxima of at least one of said silver halide emulsions and adapted to modulate the photographic color speed of said silver halide emulsion relative to the color speeds of said other emulsions to provide a color balance which is a function of the coverage of said filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting the coverage of said filter dye during said continuing coating process to an amount sufficient to obtain a predetermined color balance in response to the analysis of said sample.
Claim 17
Independent Claim
225 words
A method for the in-process correction of the color balance of a multicolor diffusion transfer photosensitive element comprising a support carrying on one surface a plurality of layers including, in sequence, a red-sensitive silver halide emulsion layer having a cyan dye developer associated therewith, a green-sensitive silver halide emulsion layer having a magenta dye developer associated therewith, said blue-sensitive silver halide emulsion layer having a yellow dye developer associated therewith; said method comprising the steps of: continuously coating on an elongated support said silver haliide emulsions; the coating of said photosensitive element including the coating of a quantity of a substantially nondiffusible, nonimage-forming optical filter dye exhibiting spectral absorption maxima substantially coinciding with the sensitization maxima of at least one of said silver halide emulsions and adapted to modulate the photographic color speed of said silver halide emulsion relative to the color speeds of said other emulsions to provide a color balance which is a function of the coverage of said filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting the coverage of said filter dye during said continuing coating process to an amount sufficient to obtain a predetermined color balance in response to the analysis of said sample.
Claim 18
Dependent Claim
30 words
A method as defined in claim 15 wherein the coverage of said filter dye is varied while the coverages of said silver halide emulsions and dye developers remain relatively constant.
Claim 19
Dependent Claim
32 words
A method as defined in claim 15 wherein said filter dye is essentially the dye moiety of the dye developer associated with the silver halide emulsion whose speed is being modulated thereby.
Claim 20
Dependent Claim
31 words
A method as defined in claim 15 wherein said cyan, magenta and yellow dye developers are contained in separate layers respectively underlying said red-sensitive, green-sensitive and blue-sensitive silver halide emulsion layers.
Claim 21
Dependent Claim
30 words
A method as defined in claim 18 wherein a cyan dye is introduced into a layer overlying said red-sensitive silver halide emulsion layer to modulate at least the red speed.
Claim 22
Dependent Claim
19 words
A method as defined in claim 19 whrein a cyan dye is introduced into said magenta dye developer layer.
Claim 23
Dependent Claim
20 words
A method as defined in claim 18 wherein a cyan dye is introduced into said red-sensitive silver halide emulsion layer.
Claim 24
Dependent Claim
30 words
A method as defined in claim 18 wherein a yellow dye is introduced into a layer overlying said bluesensitive silver halide emulsion layer to modulate at least the blue speed.
Claim 25
Independent Claim
225 words
A method for the in-process correction of the color balance of a multicolor diffusion transfer photosensitive element, said method comprising the steps of continuously coating on one surface of an elongated support a plurality of layers comprising, in sequence, a layer including a cyan dye developer, a red-sensitive silver halide emulsion layer, a layer including a magenta dye developer, a green-sensitive silver halide emulsion layer, a layer including a yellow dye developer and a blue-sensitive silver halide emulsion layer; comprising the steps of: said coating including the coating of a quantity of a substantially nondiffusible, nonimage-forming cyan filter dye in said magenta dye developer layer to provide means for modulating the exposure of said redsensitive silver halide emulsion without affecting the exposure of said other emulsion, said means providing a red color balance which is a function of the coverage of said cyan filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting the coverage of said cyan filter dye during said continued coating process to an amount sufficient to obtain a different predetermined red color balance in response to the analysis of the sample while maintaining the coverges of said silver halide emulsions and said dye developers relatively constant.
Claim 26
Independent Claim
225 words
A method for the in-process correction of the color balance of a multicolor diffusion transfer photosensitive element, said method comprising the steps of continuously coating on one surface of an elongated support a plurality of layers comprising, in sequence, a layer including a cyan dye developer, a red-sensitive silver halide emulsion layer, a layer including a magenta dye developer, a green-sensitive silver halide emulsion layer, a layer including a yellow dye developer and a blue-sensitive silver halide emulsion layer; comprising the steps of: said coating including the coating of a quantity of a substantially nondiffusible, nonimage-forming cyan filter dye in said magenta dye developer layer to provide means for modulating the exposure of said redsensitive silver halide emulsion without affecting the exposure of said other emulsion, said means providing a red color balance which is a function of the coverage of said cyan filter dye; removing a sample portion of the coated support after a length thereof has been coated; determining, by analysis, the diffusion transfer color balance of said sample; and thereafter continuing said coating and adjusting the coverage of said cyan filter dye during said continued coating process to an amount sufficient to obtain a different predetermined red color balance in response to the analysis of the sample while maintaining the coverges of said silver halide emulsions and said dye developers relatively constant.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |