US4012257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a gravure printing surface utilizing a continuous and screened negative
Assignee: Individual
•
Filing: 1976-02-13
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Granted: 1977-03-15
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Expires: 1996-02-13
Abstract
Abstract A method of producing gravure printing surfaces is disclosed. The method utilizes a separately produced screened negative made on orthochromatic film and a continuous tone negative. Both negatives are superimposed to produce a positive with variable size dots and variable tone densities which are then utilized to expose the carbon tissue resist used to etch the printing surface. Alternatively, the negatives are utilized to produce corresponding positives each of which is used to expose the carbon tissue.
Inventors
- 👤 Frank T. Geris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
78 words
A method of producing a gravure printing surface comprising the steps of: a. photographically producing a continuous tone negative in sharp focus; b. photographically producing a grey screened negative on orthochromatic film also in sharp focus; c. superimposing the continuous tone and screened negatives in register; d. producing a tone dot positive from the superimposed negatives; and e. producing said gravure printing surface from said positive by exposing a carbon tissue resist and etching in the conventional manner.
Claim 2
Independent Claim
78 words
A method of producing a gravure printing surface comprising the steps of: a. photographically producing a continuous tone negative in sharp focus; b. photographically producing a grey screened negative on orthochromatic film also in sharp focus; c. superimposing the continuous tone and screened negatives in register; d. producing a tone dot positive from the superimposed negatives; and e. producing said gravure printing surface from said positive by exposing a carbon tissue resist and etching in the conventional manner.
Claim 3
Dependent Claim
48 words
The method of claim 1 including the step of repeating steps (a) through (e) while employing a different color filter for each repetition to produce a plurality of printing surfaces each corresponding to the color filter used to produce it and collectively adapted to produce color gravure printing.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said orthochromatic film has a tonal range of approximately 0.0 to 4.0 as measured on a transmission densitometer.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said step of superimposing includes the substep of placing said negatives in register in a vacuum frame.
Claim 6
Dependent Claim
18 words
The method of claim 1 further including the step of photographically atering said negatives to effect necessary correcting.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein the steps of photographically producing a continuous tone and screened negative employ a camera in which said negatives are exposed.
Claim 8
Dependent Claim
27 words
The method of claim 1 wherein the steps of photographically producing a continuous tone and screened negative employ a vacuum frame in which said negatives are produced.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein the steps of photographically producing a continuous tone and screened negative employ an electronic scanner.
Claim 10
Dependent Claim
47 words
The method according to claim 6 wherein the step of photographically producing the screened negative includes the substeps of: a. inserting a pillow cushion screen between the camera lens and said orthochromatic film; and b. exposing said orthochromatic film through said screen to produce said screened negative.
Claim 11
Dependent Claim
16 words
The method of claim 9 wherein said screen is gray having approximately 150 lines per inch.
Claim 12
Dependent Claim
46 words
The method according to claim 7 wherein the step of producing said screened negative includes the substeps of: a. placing a pillow cushion screen over the orthochromatic film in said vacuum frame; and b. exposing said orthochromatic film in said frame to produce said screened negative.
Claim 13
Dependent Claim
72 words
The method according to claim 8 wherein the steps of producing a continuous tone negative and screened negative includes the substeps of: a. electroncially scanning a color transparency to determine tone value information; b. exposing a negative with the tone value information of said scanner to produce said continuous tone negative; and c. exposing an orthochromatic negative with the tone value information through a pillow cushion screen to produce said screened negative.
Claim 14
Independent Claim
92 words
A method of producing a gravure printing surface comprising the steps of: a. photographically producing a continuous tone negative in sharp focus; b. photographically producing a screened negative on orthochromatic film also in sharp focus; c. producing a continuous tone positive from the negative of step (a); d. producing an othochromatic screened postive from the negative of step (b); e. exposing a carbon tissue resist to the positives of steps (c) and (d) in the conventional manner; and f. etching said printing surface from the twice exposed resist in the conventional manner.
Claim 15
Independent Claim
92 words
A method of producing a gravure printing surface comprising the steps of: a. photographically producing a continuous tone negative in sharp focus; b. photographically producing a screened negative on orthochromatic film also in sharp focus; c. producing a continuous tone positive from the negative of step (a); d. producing an othochromatic screened postive from the negative of step (b); e. exposing a carbon tissue resist to the positives of steps (c) and (d) in the conventional manner; and f. etching said printing surface from the twice exposed resist in the conventional manner.
Claim 16
Dependent Claim
48 words
The method of claim 13 including the step of repeating steps (a) through (f) while employing a different color filter for each repetition to produce a plurality of printing surfaces each corresponding to the color filter used to produce it and collectively adapted to produce color gravure printing.
Claim 17
Dependent Claim
24 words
The method of claim 13 wherein said orthochromatic film has a tonal range of approximately 0.0 to 4.0 as measured on a transmission densitometer.
Claim 18
Dependent Claim
18 words
The method of claim 13 further including the step of photographically altering said negatives to effect necessary correcting.
Claim 19
Dependent Claim
26 words
The method of claim 13 wherein the steps of photographically producing a continuous tone and screened negative employ a camera in which said negatives are exposed.
Claim 20
Dependent Claim
21 words
The method of claim 13 wherein the steps of photographically producing a continuous tone and screened negative employ an electronic scanner.
Claim 21
Dependent Claim
47 words
The method according to claim 17 wherein the step of photographically producing the screened negative includes the substeps of: a. inserting a pillow cushion screen between the camera lens and said orthochromatic film; and b. exposing said orthochromatic film through said screen to produce said screened negative.
Claim 22
Dependent Claim
72 words
The method according to claim 18 wherein the steps of producing a continuous tone negative and screened negative includes the substeps of: a. electronically scanning a color transparency to determine tone value information; b. exposing a negative with the tone value information of said scanner to produce said continuous tone negative; and c. exposing an orthochromatic negative with the tone value information through a pillow cushion screen to produce said screened negative.
References Cited (Backward Citations)
US2387048A
Cited
US2628903A
Cited
US2907657A
Cited
US2961315A
Cited
US3325285A
Cited
US3746540A
Cited
US3394652A
Cited
US3589899A
Cited
US3809555A
Cited
US3804622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |