US3762324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscous fluid thickness gauge
Assignee: AB Dick Co
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Filing: 1971-07-29
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Granted: 1973-10-02
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Expires: 1991-07-29
Abstract
Abstract A viscous fluid thickness gauge is disclosed capable of measuring the thickness of a viscous fluid on a roll while the roll is rotating at any speed. The thickness gauge can be continuously monitored and has an output capable for use as a control function. The invention is suitable for use with a printing machine to measure the ink thickness on a printing roll.
Inventors
- 👤 D Ivary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:03
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; B; B41; B41F; B41F31/00; B41F31/005; B41F33/00; B41F33/0063; Y; Y10; Y10S; Y10S101/00; Y10S101/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A method for measuring the thickness of an ink coating in a printing machine on first and second rotatably mounted rolls having caused the ink to coat both rolls uniformly through rolling contact, comprising: driving said second roll solely by contact with said first roll; allowing the axis of said second roll to move in accordance with changes in effective radii of said rolls due to changes in said ink coating thickness; detecting the angular speeds of said rolls by means of pulse generators rotating with said rolls; comparing the angular speed of said rolls as said speeds change relative to one another due to the changes in effective radii caused by ink thickness changes; determining the thickness of said ink coating as a function of the angular speeds of said rolls and the distance which the axis of said second roll moves; and increasing or decreasing the rate of ink application to said first roll to maintain the desired thickness.
Claim 2
Independent Claim
161 words
A method for measuring the thickness of an ink coating in a printing machine on first and second rotatably mounted rolls having caused the ink to coat both rolls uniformly through rolling contact, comprising: driving said second roll solely by contact with said first roll; allowing the axis of said second roll to move in accordance with changes in effective radii of said rolls due to changes in said ink coating thickness; detecting the angular speeds of said rolls by means of pulse generators rotating with said rolls; comparing the angular speed of said rolls as said speeds change relative to one another due to the changes in effective radii caused by ink thickness changes; determining the thickness of said ink coating as a function of the angular speeds of said rolls and the distance which the axis of said second roll moves; and increasing or decreasing the rate of ink application to said first roll to maintain the desired thickness.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |