US4371265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dot percentage measuring device
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1980-09-23
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Granted: 1983-02-01
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Expires: 2000-09-23
Abstract
Abstract In printing with dots, a dot percentage is one of the important factors which determine the quality of a printed matter, and accordingly it is essential to control the dot percentage throughout the printing process from makeup to printing. In order to readily and quickly measure the dot percentage with high accuracy, a microscope section and a display section are formed as one unit, and a correction circuit for light transmittance is provided.
Inventors
- 👤 Yuji Mitsuhashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/86; B; B41; B41F; B41F33/00; B41F33/0036; G03; G03F; G03F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A dot percentage measuring means comprising: a light receiving section provided inside a measuring washing table; and a light emitting section adapted to emit a predetermined intensity of light to a radiated object to be measured on said measuring table, said light emitting section being fixedly provided to confront said light receiving section to measure a dot percentage a transmitting density of said object from a quantity of light passed through said object.
Claim 2
Dependent Claim
73 words
A dot percentage measuring means comprising: a light receiving section provided inside a measuring washing table; and a light emitting section adapted to emit a predetermined intensity of light to a radiated object to be measured on said measuring table, said light emitting section being fixedly provided to confront said light receiving section to measure a dot percentage a transmitting density of said object from a quantity of light passed through said object.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |