US3552311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dampening system for a lithographic press
Assignee: Didde Graphic Systems Corp
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Filing: 1968-07-12
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Granted: 1971-01-05
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Expires: 1988-07-12
Abstract
Abstract A dampening system for a lithographic press in which there is a train of rollers from the dampening fluid pan to the form roller of the press comprising a pan roller, a smooth, resilientsurfaced metering roller and a chrome-surfaced transfer roller. The metering and transfer rollers are mounted in parallelism a fixed distance apart so that the surface pressure therebetween is uniform throughout the length of the rollers. The pan roller is mounted so that the surface pressure against and along the length of the metering roller can be varied to permit the transfer of a proper amount of dampening fluid by the pan roller to the entire length of the metering roller or only to one end thereof.
Inventors
- 👤 Nello J Petri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:49
CPC Classifications
B; B41; B41F; B41F7/00; B41F7/20; B41F7/24; B41F7/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
In a device for dampening the plate of a lithographic press: a. a frame; b. a dampening fluid pan supported on said frame; c. a pan roller having its ends journaled in said frame, said pan roller having a portion of the periphery of the surface thereof disposed in said pan; d. a dampening fluid transfer roller having its ends journaled in said frame, said transfer roller having a chromeplated surface; e. a dampening fluid metering roller having its ends journaled in said frame, said metering roller having a smooth, resilient surface in rotative surface engagement with said pan and transfer rollers; f. said metering roller and said transfer roller being supported on said frame with the axes of said rollers being parallel and spaced apart a fixed distance so that the surfaces of said rollers are in predetermined pressure engagement with each other; and g. first and second adjustment means for independently moving the ends of said pan roller towards and away from the axis of said metering roller to tilt the axis of the pan roller and vary the surface pressure relationship therebetween along the line of contact.
Claim 2
Dependent Claim
190 words
In a device for dampening the plate of a lithographic press: a. a frame; b. a dampening fluid pan supported on said frame; c. a pan roller having its ends journaled in said frame, said pan roller having a portion of the periphery of the surface thereof disposed in said pan; d. a dampening fluid transfer roller having its ends journaled in said frame, said transfer roller having a chromeplated surface; e. a dampening fluid metering roller having its ends journaled in said frame, said metering roller having a smooth, resilient surface in rotative surface engagement with said pan and transfer rollers; f. said metering roller and said transfer roller being supported on said frame with the axes of said rollers being parallel and spaced apart a fixed distance so that the surfaces of said rollers are in predetermined pressure engagement with each other; and g. first and second adjustment means for independently moving the ends of said pan roller towards and away from the axis of said metering roller to tilt the axis of the pan roller and vary the surface pressure relationship therebetween along the line of contact.
Claim 3
Dependent Claim
43 words
In a device as set forth in claim 1, and further including: h. means releasably locking said first and second adjustment means together for simultaneous movement of the ends of said pan roller towards and away from the axis of said metering roller.
Claim 4
Dependent Claim
53 words
In a device as set forth in claim 2, and further including: i. a first stop member on said frame; and j. a second stop member releasably connectable to said adjustment means for movement therewith and engageable with said first stop member to arrest movement of said pan roller towards said metering roller.
References Cited (Backward Citations)
US1364257A
Cited
US2162248A
Cited
US2762295A
Cited
US2750883A
Cited
US3014421A
Cited
US3039386A
Cited
US3019727A
Cited
US3283707A
Cited
US3343484A
Cited
US3455238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |