Patent US3800075A successfully refreshed from Google Patents.
US3800075A
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US
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Graphic arts process simulator modified for letterpress simulation
Assignee: COMMERCIAL GRAPHCS Inc
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Filing: 1972-11-16
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Granted: 1974-03-26
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Expires: 1992-11-16
Abstract
Abstract Disclosed is an improved graphic arts process simulator, which enables accurate simulation of a letterpress graphic arts process. Existing graphic arts process simulators generally include an analog signal processor in which various signal processing elements are used to process an electrical signal representative of a halftone transparency in accordance with the steps of a selected graphic arts process. The improvement described herein is a modified analog signal processor which simulates nonuniformities that normally occur in a letterpress graphic arts process and more specifically simulates the dot etch loss which normally occurs when a printing plate for letterpress printing is made from such a halftone transparency.
Inventors
- 👤 C Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
G; G03; G03F; G03F1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
76 words
In a graphic arts process simulator having an analog signal processor wherein there is processed an electrical signal representative of the halftone transparency from which a printing plate is made, an improved analog signal processor capable of simulating a letterpress graphic arts process wherein said improvements comprises: a signal processing element responsive to said electrical signal and having a transfer characteristic proportional to the dot etch loss which normally occurs when letterpress printing plates are made.
Claim 2
Dependent Claim
76 words
In a graphic arts process simulator having an analog signal processor wherein there is processed an electrical signal representative of the halftone transparency from which a printing plate is made, an improved analog signal processor capable of simulating a letterpress graphic arts process wherein said improvements comprises: a signal processing element responsive to said electrical signal and having a transfer characteristic proportional to the dot etch loss which normally occurs when letterpress printing plates are made.
Claim 3
Dependent Claim
103 words
In a graphic arts process simulator having an analog signal processor wherein there is processed an electrical signal representative of a halftone transparency from which a printing plate is made and which includes a signal processing element that simulates ink spreading nonuniformities which normally occur in the printing process, an improved analog signal processor capable of simulating a letterpress graphic arts process wherein said improvement comprises: a modified signal processing element responsive to said electrical signal and having a transfer characteristic that is jointly proportional to said ink spreading nonuniformities and dot etch loss which normally occurs when letterpress printing plates are made.
Claim 4
Dependent Claim
103 words
In a graphic arts process simulator having an analog signal processor wherein there is processed an electrical signal representative of a halftone transparency from which a printing plate is made and which includes a signal processing element that simulates ink spreading nonuniformities which normally occur in the printing process, an improved analog signal processor capable of simulating a letterpress graphic arts process wherein said improvement comprises: a modified signal processing element responsive to said electrical signal and having a transfer characteristic that is jointly proportional to said ink spreading nonuniformities and dot etch loss which normally occurs when letterpress printing plates are made.
Claim 5
Dependent Claim
48 words
Apparatus in accordance with claim 2 wherein said modified signal processing element comprises a non-linear amplifier whose transfer characteristic simulates said ink spreading nonuniformities and which further includes a diode for altering said transfer characteristic by an amount which corresponds to and therefore simulates the dot etch loss.
References Cited (Backward Citations)
US3123666A
Cited
US3128333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |