US4600666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated photoscreen for making a halftone reproduction printing plate from a photograph
Assignee: Individual
•
Filing: 1984-01-05
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Granted: 1986-07-15
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Expires: 2004-01-05
Abstract
Abstract The photoscreen for making a halftone reproduction from a photograph is used in a process where the photograph is placed in a reproducing position relative to a reproducing apparatus and the screen is interposed between the photograph and the reproducing means of the reproducing apparatus so that upon operation of the reproducing apparatus, a halftone reproduction is created. The photoscreen comprises a sheet of transparent material having on the bottom surface thereof an array of light modulating, varying density, light gray, vignetting dots mixed with an array of light modulating white dots preferably printed on the top surface thereof.
Inventors
- 👤 Edmund S. Zink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:05
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/14; G03F5/16
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
141 words
A method for making a halftone reproduction from a document, such as a photograph, having continuous tone areas, comprising the steps of: placing a document in a reproducing position relative to a reproducing apparatus; interposing between the document and reproducing means of the reproducing apparatus a transparent photoscreen comprising a sheet of transparent substrate material having an array of varying density, light modulating, light gray, vignetting dots which vary in density from a lightest density outer area to a darkest core density in the extreme center of the dot formed on one side of the sheet mixed with an array of light modulating white dots formed on the other side of the sheet and operating the reproducing apparatus to create a halftone reproduction of the document or photograph with said photoscreen serving to reduce the original document's continous tone density range.
Claim 2
Independent Claim
141 words
A method for making a halftone reproduction from a document, such as a photograph, having continuous tone areas, comprising the steps of: placing a document in a reproducing position relative to a reproducing apparatus; interposing between the document and reproducing means of the reproducing apparatus a transparent photoscreen comprising a sheet of transparent substrate material having an array of varying density, light modulating, light gray, vignetting dots which vary in density from a lightest density outer area to a darkest core density in the extreme center of the dot formed on one side of the sheet mixed with an array of light modulating white dots formed on the other side of the sheet and operating the reproducing apparatus to create a halftone reproduction of the document or photograph with said photoscreen serving to reduce the original document's continous tone density range.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said photoscreen is placed on the document or photograph.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said reproducing apparatus is an electrostatic platemaker.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said reproducing apparatus is a copying machine.
Claim 6
Dependent Claim
35 words
The method of claim 1 wherein said reproducing apparatus is an offset camera and said halftone reproduction is a halftone film negative used to produce a positive or negative halftone image on an offset plate.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said dots occupy 1% to 40% of the photoscreen space.
Claim 8
Dependent Claim
17 words
The method of claim 1 wherein said vignetting dots occupy 1% to 40% of the total photoscreen.
Claim 9
Dependent Claim
17 words
The method of claim 7 wherein said vignetting dots occupy 25% to 30% of the total photoscreen.
Claim 10
Dependent Claim
16 words
The method of claim 7 wherein said vignetting dots occupy 25% of the total photoscreen space.
Claim 11
Dependent Claim
18 words
The method of claim 1 wherein said white dots occupy 1% to 40% of the total photoscreen space.
Claim 12
Dependent Claim
18 words
The method of claim 10 wherein said white dots occupy 25% to 30% of the total photoscreen space.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein said white dots occupy 25% of the dot position spaces per line.
Claim 14
Dependent Claim
15 words
The method of claim 1 wherein said screen is made from a piece of film.
Claim 15
Dependent Claim
14 words
The method of claim 13 wherein said film is made of mylar or acetate.
Claim 16
Dependent Claim
15 words
The method of claim 13 wherein said film is 0.004 to 0.007 inch mylar film.
Claim 17
Dependent Claim
23 words
The method of claim 13 wherein said screen is made using a glass screen having anywhere from 60 to 160 lines per inch.
Claim 18
Dependent Claim
15 words
The method of claim 16 wherein the glass screen has approximately 85 lines per inch.
Claim 19
Dependent Claim
39 words
The method of claim 16 wherein said vignetting dots are created photographically on one side of said film using the glass screen and said white dots are printed on the other side of said film to create said photoscreen.
Claim 20
Dependent Claim
20 words
The method of claim 1 wherein said vignetting dots are created with a line angle of from 0° to 180°.
Claim 21
Dependent Claim
20 words
The method of claim 1 wherein said white dots are created with a line angle of from 0° to 180°.
Claim 22
Dependent Claim
32 words
The method of claim 1 wherein said white dots and vignetting dots are each created with a line angle of approximately 45° and with the white dots situated between said vignetting dots.
Claim 23
Dependent Claim
27 words
The method of claim 1 wherein said vignetting dots have a line angle of approximately 45° and said white dots have a line angle of approximately 105°.
Claim 24
Dependent Claim
141 words
A photoscreen for making a halftone reproduction from a document, such as a photograph, having continuous tone areas, in a process where a photograph is placed in a reproducing position relative to a reproducing apparatus and said photoscreen is interposed between the document and reproducing means of the reproducing apparatus so that upon operation of the reproducing apparatus, a halftone reproduction of the document is created, said photoscreen comprising a sheet of transparent substrate material having an array of light modulating, varying density, light gray, vignetting dots formed on one side thereof, which vary in density from a lightest density outer area on the outside perimeter of the dot to a darkest core density in the extreme center of the dot, mixed with an array of light modulating white dots formed on the other side of said sheet of substrate material.
Claim 25
Dependent Claim
141 words
A photoscreen for making a halftone reproduction from a document, such as a photograph, having continuous tone areas, in a process where a photograph is placed in a reproducing position relative to a reproducing apparatus and said photoscreen is interposed between the document and reproducing means of the reproducing apparatus so that upon operation of the reproducing apparatus, a halftone reproduction of the document is created, said photoscreen comprising a sheet of transparent substrate material having an array of light modulating, varying density, light gray, vignetting dots formed on one side thereof, which vary in density from a lightest density outer area on the outside perimeter of the dot to a darkest core density in the extreme center of the dot, mixed with an array of light modulating white dots formed on the other side of said sheet of substrate material.
Claim 26
Dependent Claim
17 words
The photoscreen of claim 23 wherein said dots occupy 1% to 40% of the total photoscreen space.
Claim 27
Dependent Claim
18 words
The photoscreen of claim 23 wherein said vignetting dots occupy 1% to 40% of the total photoscreen space.
Claim 28
Dependent Claim
18 words
The photoscreen of claim 25 wherein said vignetting dots occupy 25% to 30% of the total photoscreen space.
Claim 29
Dependent Claim
17 words
The photoscreen of claim 25 wherein said vignetting dots occupy approximately 25% of the total photoscreen space.
Claim 30
Dependent Claim
19 words
The photoscreen of claim 23 wherein said white dots occupy approximately 1% to 40% of the total photoscreen space.
Claim 31
Dependent Claim
18 words
The photoscreen of claim 28 wherein said white dots occupy 25% to 30% of the total photoscreen space.
Claim 32
Dependent Claim
17 words
The photoscreen of claim 28 wherein said white dots occupy approximately 25% of the total photoscreen space.
Claim 33
Dependent Claim
15 words
The photoscreen of claim 23 wherein said photoscreen is made from a piece of film.
Claim 34
Dependent Claim
14 words
The photoscreen of claim 31 wherein said film is made of mylar or acetate.
Claim 35
Dependent Claim
15 words
The photoscreen of claim 31 wherein said film is 0.004 to 0.007 inch mylar film.
Claim 36
Dependent Claim
23 words
The photoscreen of claim 31 wherein said photoscreen is made using a glass screen having anywhere from 60 to 160 lines per inch.
Claim 37
Dependent Claim
15 words
The photoscreen of claim 34 wherein the glass screen has approximately 85 lines per inch.
Claim 38
Dependent Claim
39 words
The photoscreen of claim 34 wherein said vignetting dots are created photographically on one side of said film using the glass screen and said white dots are printed on the other side of said film to create said photoscreen.
Claim 39
Dependent Claim
20 words
The photoscreen of claim 23 wherein said vignetting dots are created with a line angle of from 0° to 180°.
Claim 40
Dependent Claim
20 words
The photoscreen of claim 23 wherein said white dots are created with a line angle of from 0° to 180°.
Claim 41
Dependent Claim
32 words
The photoscreen of claim 23 wherein said white dots and vignetting dots are each created with a line angle of approximately 45° and with the white dots situated between the vignetting dots.
Claim 42
Dependent Claim
27 words
The photoscreen of claim 23 wherein said vignetting dots have a line angle of approximately 45° and said white dots have a line angle of approximately 105°.
References Cited (Backward Citations)
GB889107A
Cited
US3912510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |