US5152225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a printing film and printing process using same
Assignee: JOSEF RAGANITSCH GmbH
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Filing: 1990-12-18
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Granted: 1992-10-06
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Expires: 2010-12-18
Abstract
Abstract A printing process for producing a print film whose developed image can be transferred to an offset plate or a screen printing screen or even to a cathodically-charged plate, is made by scanning an original and laser writing under the control of the scanning signals on a light-sensitive layer through a diffusion foil. The latent image is then developed and fixed and the resulting film transferred to the printing carrier such as the offset plate or screen printing screen.
Inventors
- 👤 Josef Raganitsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:41
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2051; G03F7/2053; G03F7/2055; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
A printing process which comprises the steps of: (a) continuous-tone scanning the original to produce electrical signals representing half-tone scanning of said original; (b) directing a laser beam through a diffusion foil onto a light-sensitive layer of a film to expose said film and controlling said laser beam with said electrical signals to form a latent image of said original in said film; (c) developing said latent image in said film to form a developed image and fixing said developed image; (d) transferring said developed image to a printing master; and (e) printing a reproduction of said original with said printing master.
Claim 2
Dependent Claim
102 words
A printing process which comprises the steps of: (a) continuous-tone scanning the original to produce electrical signals representing half-tone scanning of said original; (b) directing a laser beam through a diffusion foil onto a light-sensitive layer of a film to expose said film and controlling said laser beam with said electrical signals to form a latent image of said original in said film; (c) developing said latent image in said film to form a developed image and fixing said developed image; (d) transferring said developed image to a printing master; and (e) printing a reproduction of said original with said printing master.
Claim 3
Dependent Claim
21 words
The printing process defined in claim 1 wherein said developed image is transferred in step (d) to an offset printing plate.
Claim 4
Dependent Claim
19 words
The printing process defined in claim 1 wherein said developed image is transferred in step (d) to a carrier.
Claim 5
Dependent Claim
30 words
The printing process defined in claim 1 wherein said diffusion foil is placed on said light-sensitive layer for exposure of said light-sensitive layer to said laser beam through said foil.
Claim 6
Dependent Claim
30 words
The printing process defined in claim 4, further comprising holding said diffusion foil against said light-sensitive layer for exposure of said light-sensitive layer to said laser beam through said foil.
Claim 7
Dependent Claim
20 words
The printing process defined in claim 5 wherein said diffusion foil is held by subatmospheric pressure against said light-sensitive layer.
Claim 8
Dependent Claim
20 words
The printing process defined in claim 5 wherein said diffusion foil is held by superatmospheric pressure against said light-sensitive layer.
Claim 9
Dependent Claim
21 words
The printing process defined in claim 4 wherein said light-sensitive layer and said diffusion foil are shaped into a drum configuration.
Claim 10
Dependent Claim
33 words
The printing process defined in claim 1, further comprising the step of presensitizing said light-sensitive layer to said laser beam by exposing said light-sensitive layer prior to step (b) to a threshold illumination.
Claim 11
Dependent Claim
44 words
The printing process defined in claim 1 wherein said original is a multicolor original, further comprising carrying out steps (a) to (c) for each of a multiplicity of colors of said original and transferring each of the developed images thus obtained to printing master.
Claim 12
Dependent Claim
23 words
The printing process defined in claim 1 wherein said diffusion foil has a spreading angle for said laser beam of 5° to 30°.
Claim 13
Dependent Claim
13 words
The printing process defined in claim 11 wherein said spreading angle is 18°.
Claim 14
Independent Claim
85 words
A method of producing a printing film comprising the steps of: (a) continuous-tone scanning an original to produce electrical signals representing half-tone scanning of said original; (b) directing a laser beam through a diffusion foil onto a light-sensitive layer of a film to expose said film and controlling said laser beam with said electrical signals to form a latent image of said original in said film; and (c) developing said latent image in said film to form a developed image and fixing said developed image.
Claim 15
Independent Claim
85 words
A method of producing a printing film comprising the steps of: (a) continuous-tone scanning an original to produce electrical signals representing half-tone scanning of said original; (b) directing a laser beam through a diffusion foil onto a light-sensitive layer of a film to expose said film and controlling said laser beam with said electrical signals to form a latent image of said original in said film; and (c) developing said latent image in said film to form a developed image and fixing said developed image.
Claim 16
Dependent Claim
25 words
A method of producing a printing film defined in claim 13 wherein said light-sensitive layer and said diffusion foil are shaped into a drum configuration.
Claim 17
Dependent Claim
37 words
The method of producing a printing film defined in claim 13, further comprising the step of presensitizing said light-sensitive layer to said laser beam by exposing said light-sensitive layer prior to step (b) to a threshold illumination.
Claim 18
Dependent Claim
44 words
The method defined in claim 13 wherein said original is a multicolor original, further comprising carrying out steps (a) to (c) for each of a multiplicity of colors of said original and transferring each of the developed images thus obtained to a printing master.
Claim 19
Dependent Claim
22 words
The method defined in claim 13 wherein said diffusion foil has a spreading angle for said laser beam of 5° to 30°.
Claim 20
Dependent Claim
12 words
The method defined in claim 17 wherein said spreading angle is 18°.
References Cited (Backward Citations)
US4063949A
Cited
US4587209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |