US3915705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of contour line images
Assignee: Agfa Gevaert NV
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Filing: 1974-09-09
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Granted: 1975-10-28
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Expires: 1994-09-09
Abstract
Abstract A photographic process for forming contour line images with a recording layer containing particles of intimately mixed N-vinyl carbazole and carbon tetrabromide that are in effective contact with a dye base and are dispersed in a hardenable hydrophilic colloid binder. The dye base is preferably a styryl dye base. The recording layer may contain colouring matter in the form of dyes or coloured pigments. Contour line images are produced that either are of low opacity on an optically dense recording layer image background or have a relatively high opacity as compared with the image recording layer background.
Inventors
- 👤 Edwin Hendrik Hazenbosch
- 👤 Albert Lucine Poot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03C5/00; G03C5/56
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
IMAGEWISE EXPOSING A RECORDING LAYER, CONTAINING PARTICLES OF INTIMATELY MIXED N-VINYLCARBAZOLE AND CARBON TETRABROMIDE THAT IN EFFECTIVE CONTACT WITH A STRYL DYE BASE AND ARE DISPERSED IN A HARDENABLE HYDROPHILIC COLLIOD BINDER TO ACTINIC OR ULTRAVIOLET LIGHT UNTIL A DISTINCTLY VISIBLE PRINT-OUT IMAGE OF A POLY-N-VINYLCARBAZOLE DYE IS FORMED WITHIN SAID EXPOSED AREAS, SAID PRINT-OUT DYE IMAGE BEING INCIDENTALLY SURROUNDED BY A VISIBLE NARROW BORDER IMAGE HAVING A COLOR DIFFERENT FROM THAT OF SAID PRINT-OUT IMAGE,
Claim 2
Dependent Claim
76 words
IMAGEWISE EXPOSING A RECORDING LAYER, CONTAINING PARTICLES OF INTIMATELY MIXED N-VINYLCARBAZOLE AND CARBON TETRABROMIDE THAT IN EFFECTIVE CONTACT WITH A STRYL DYE BASE AND ARE DISPERSED IN A HARDENABLE HYDROPHILIC COLLIOD BINDER TO ACTINIC OR ULTRAVIOLET LIGHT UNTIL A DISTINCTLY VISIBLE PRINT-OUT IMAGE OF A POLY-N-VINYLCARBAZOLE DYE IS FORMED WITHIN SAID EXPOSED AREAS, SAID PRINT-OUT DYE IMAGE BEING INCIDENTALLY SURROUNDED BY A VISIBLE NARROW BORDER IMAGE HAVING A COLOR DIFFERENT FROM THAT OF SAID PRINT-OUT IMAGE,
Claim 3
Dependent Claim
19 words
A PHOTOGRAPHIC PROCESS FOR PRODUCING A CONTOUR LINE DR BORDER IMAGE AGAINST A CONTRASTING BACKGROUND COMPRISING THE STEPS OF:
Claim 4
Dependent Claim
19 words
A PHOTOGRAPHIC PROCESS FOR PRODUCING A CONTOUR LINE DR BORDER IMAGE AGAINST A CONTRASTING BACKGROUND COMPRISING THE STEPS OF:
Claim 5
Dependent Claim
41 words
UNIFORMLY EXPOSING THE IMAGEWISE EXPOSED LAYER TO ACTINIC LIGHT UNTIL COLORATION APPEARS IN THE ORGINALLY UNEXPOSED BACKGROUND AREAS AND THE COLORATION IN THE ORIGINALLY EXPOSED IMAGE AREAS IS INTENSIFIED, SAID NARROW BORDER IMAGE BEING SUBSTANTIALLY UNAFFECTED BY SUCH UNIFROM EXPOSURE, AND
Claim 6
Dependent Claim
41 words
UNIFORMLY EXPOSING THE IMAGEWISE EXPOSED LAYER TO ACTINIC LIGHT UNTIL COLORATION APPEARS IN THE ORGINALLY UNEXPOSED BACKGROUND AREAS AND THE COLORATION IN THE ORIGINALLY EXPOSED IMAGE AREAS IS INTENSIFIED, SAID NARROW BORDER IMAGE BEING SUBSTANTIALLY UNAFFECTED BY SUCH UNIFROM EXPOSURE, AND
Claim 7
Dependent Claim
53 words
The process of claim 1 wherein said recording layer is carried on a support of a coloration contrasting with the color of the weakened border image and including the further step of subjecting the layer after step (3) to a washing off step to remove all of the layer except said border image.
Claim 8
Dependent Claim
41 words
uniformly exposing the imagewise exposed layer to actinic light until coloration appears in the originally unexposed background areas and the coloration in the originally exposed image areas is intensified, said narrow border image being substantially unaffected by such uniform exposure; and
Claim 9
Dependent Claim
41 words
uniformly exposing the imagewise exposed layer to actinic light until coloration appears in the originally unexposed background areas and the coloration in the originally exposed image areas is intensified, said narrow border image being substantially unaffected by such uniform exposure; and
Claim 10
Dependent Claim
50 words
UNIFORMLY HEATING SAID MATERIAL IN THE RANGE OF ABOUT 100*-150*C UNTIL THE COLORATION OF SAID BORDER IMAGE IS SUBSTANTIALLY WEAKENED BUT WITHOUT SUBSTANTIALLY WEAKENING THE COLORATION PRODUCED IN THE INITIAL IMAGE AND BACKGROUND AREAS, WHEREBY SAID BRODER IMAGE APPEARS AS A WEAKLY COLORED IMAGE AGAINST A MORE STRONGLY COLORED BACKGROUND.
Claim 11
Dependent Claim
50 words
UNIFORMLY HEATING SAID MATERIAL IN THE RANGE OF ABOUT 100*-150*C UNTIL THE COLORATION OF SAID BORDER IMAGE IS SUBSTANTIALLY WEAKENED BUT WITHOUT SUBSTANTIALLY WEAKENING THE COLORATION PRODUCED IN THE INITIAL IMAGE AND BACKGROUND AREAS, WHEREBY SAID BRODER IMAGE APPEARS AS A WEAKLY COLORED IMAGE AGAINST A MORE STRONGLY COLORED BACKGROUND.
Claim 12
Dependent Claim
50 words
uniformly heating said material in the range of about 100*-150*C until the coloration of said border image is substantially weakened but without substantially weakening the coloration produced in the initial image and background areas, whereby said border image appears as a weakly colored image against a more strongly colored background.
Claim 13
Dependent Claim
50 words
uniformly heating said material in the range of about 100*-150*C until the coloration of said border image is substantially weakened but without substantially weakening the coloration produced in the initial image and background areas, whereby said border image appears as a weakly colored image against a more strongly colored background.
Claim 14
Dependent Claim
13 words
The process of claim 2 wherein said washing off step is with water.
Claim 15
Dependent Claim
45 words
The process of claim 2 wherein following said heating step (3) but before said washing off step, said layer is exposed to ultraviolet radiation to darken the coloration of said border image without rendering said border image susceptible to removal in said washing off step.
Claim 16
Dependent Claim
26 words
A photographic process according to claim 1, wherein the recording layer incorporates coloring matter in the form of at least one dye or colored pigment particles.
Claim 17
Dependent Claim
16 words
A photographic process according to claim 1, wherein the dye base is a 4-(p-dimethylaminostyryl)-quinoline or 2-(p-dimethylaminostyryl)-quinoline.
Claim 18
Dependent Claim
14 words
A photographic process according to claim 1, wherein the hydrophilic colloid binder is gelatin.
Claim 19
Dependent Claim
23 words
A process according to claim 1, wherein the recording layer contains N-vinylcarbazole and carbon tetrabromide in a molar range of 40:60 to 75:25.
Claim 20
Dependent Claim
35 words
A process according to claim 1, wherein the recording layer contains 60 parts by weight of hardenable hydrophilic colloid binder with respect to 100 parts by weight of the mixture of N-vinylcarbazole and carbon tetrabromide.
Claim 21
Dependent Claim
25 words
A process according to claim 1, wherein the molar ratio of dye base to photosensitive carbon tetrabromide is in the range of 0.0001 to 0.01.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |