US3856529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and materials for making half tone prints
Assignee: Kalle GmbH and Co KG
•
Filing: 1971-09-08
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Granted: 1974-12-24
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Expires: 1991-09-08
Abstract
Abstract This invention relates to a method for the production of a printing plate capable of reproducing continuous tones, wherein a light-sensitive material suitable for the production of a printing plate is exposed under a continuous tone original, exposure light being caused to traverse a layer which presents sufficiently uniformly distributed areas of 0.05 to 10 microns in diameter, the light-transmission capacity of which areas contrasts with that of their immediate environment, this contrast layer being of the nature of a so-called shadow pattern, and the exposed material is developed and, if desired, etched.
Inventors
- 👤 G Schadlich
- 👤 R Haenisch
- 👤 R Moraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:39
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/115
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A LIGHT-SENSITIVE MATERIAL SUITABLE FOR THE PRODUCTION OF A PRINTING PLATE CAPABLE OF REPRODUCING CONTINUOUS TONES COMPRISING A BASE, A LIGHT-SENSITIVE LAYER THE LIGHT-SENSITIVE SUBSTANCE OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF NAPHTHOQUINONE DIAZIDE, IMINOQUINONE DIAZIDE, DIAZIDO STILBENE DIDULFONIC ACID, AND PHOTOPOLYMERIZABLE COMPOUNDS ON SAID BASE, AND A CONTRAST, LAYER WHICH PRESENTS SUFFICIENTLY UNIFORMLY DISTRIBUTED AREAS, PRODUCED BY A MATERIAL SELECTED FROM THE GROUP CONSISTING OF WHITE AND YELLOW OPAQUE PIGMENTS, OF 0.05 TO 10 MICRONS IN DIAMETER, THE LIGHT-TRANSMISSION CAPACITY OF WHICH AREAS CONTRAST WITH THAT OF THEIR IMMEDIATE ENVIRONMENT.
Claim 2
Dependent Claim
93 words
A LIGHT-SENSITIVE MATERIAL SUITABLE FOR THE PRODUCTION OF A PRINTING PLATE CAPABLE OF REPRODUCING CONTINUOUS TONES COMPRISING A BASE, A LIGHT-SENSITIVE LAYER THE LIGHT-SENSITIVE SUBSTANCE OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF NAPHTHOQUINONE DIAZIDE, IMINOQUINONE DIAZIDE, DIAZIDO STILBENE DIDULFONIC ACID, AND PHOTOPOLYMERIZABLE COMPOUNDS ON SAID BASE, AND A CONTRAST, LAYER WHICH PRESENTS SUFFICIENTLY UNIFORMLY DISTRIBUTED AREAS, PRODUCED BY A MATERIAL SELECTED FROM THE GROUP CONSISTING OF WHITE AND YELLOW OPAQUE PIGMENTS, OF 0.05 TO 10 MICRONS IN DIAMETER, THE LIGHT-TRANSMISSION CAPACITY OF WHICH AREAS CONTRAST WITH THAT OF THEIR IMMEDIATE ENVIRONMENT.
Claim 3
Dependent Claim
18 words
A light-sensitive material according to claim 1 in which the contrast layer and the light-sensitive layer are identical.
Claim 4
Dependent Claim
19 words
A light-sensitive material according to claim 1 in which the contrast layer is a coating on the light-sensitive layer.
Claim 5
Dependent Claim
16 words
A light-sensitive material according to claim 1 in which the uniformly distributed areas are randomly distributed.
References Cited (Backward Citations)
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US2095018A
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US2059829A
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US2976250A
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US2993789A
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |