Patent US3673959A successfully refreshed from Google Patents.
US3673959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dampening system for lithographic printing press
Assignee: Boeing North American Inc
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Filing: 1970-04-22
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Granted: 1972-07-04
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Expires: 1990-04-22
Abstract
Abstract A dampening system for a lithographic press which includes a resilient applicator roller in rolling engagement with a resilient intermediate roller which receives dampening fluid from a hard-surfaced hydrophilic roller. Riding on the applicator roller is a distributor roller. The applicator roller is arranged adjacent an ink form roller and the intermediate and distributor rollers are mounted on a subframe which is rockable about the axis of the applicator roller so that when the applicator roller is tripped away from the plate cylinder the intermediate roller may be disengaged from the hydrophilic roller while the distributor roller is swung into engagement with the ink form roller. All rollers on the downstream side of the hydrophilic roller are thus coupled to the ink system for convenient and simultaneous wash-up. The intermediate roller has means arranged approximately at right angles for adjusting the pressure applied by it to the applicator roller and to the hydrophilic roller. The intermediate roller is gear driven from the plate cylinder and serves to drive the applicator roller at press surface speed by frictional contact when the applicator roller is tripped away from the plate cylinder, with a slip clutch being interposed in the gear train so that the speed of the applicator roller is controlled by, and corresponds to, the surface speed of the plate when the applicator roller is in its working position.
Inventors
- 👤 Leslie J Jezuit
- 👤 Harold R Kollars
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:58
CPC Classifications
B; B41; B41F; B41F35/00; B41F35/002; B41F7/00; B41F7/20; B41F7/24; B41F7/26; B41L; B41L25/00; B41L25/16; B41L41/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
313 words
In combination with a lithographic printing press having a frame, a rotatable cylindrical printing surface supported by the frame, and an ink form roll contacting and applying ink to the printing surface, a dampener comprising a resilient applicator roll for applying dampening fluid to the press printing surface, a hard, smooth surfaced, hydrophilic roll for supplying dampening fluid for the applicator roll, a resilient intermediate roll for transferring dampening fluid from said hydrophilic roll to said applicator roll, first mounting means rotatably supporting said applicator roll and pivotally movable relative to the press frame to and from a first position and a second position for selectively engaging and disengaging said applicator roll in and from rolling contact with the press printing surface, second mounting means rotatably supporting said intermediate roll and pivotally movable relative to said first mounting means to and from a first position and a second position for selectively engaging and disengaging said intermediate roll in and from rolling contact with the ink form roll and alternately in and from rolling contact with said hydrophilic roll, first actuator means connected to said first mounting means for selectively pivoting said first mounting means to and from said first mounting means first and second positions, and second actuator means connected to said second mounting means for selectively pivoting said second mounting means to and from said second mounting means first and second positions, said intermediate roll simultaneously contacting said applicator roll and said hydrophilic roll when said first mounting means is pivoted to said first mounting mEans first position and said second mounting means is pivoted to said second mounting means second position and simultaneously contacting said applicator roll and the press ink form roll when said first mounting means is pivoted to said first mounting means second position and said second mounting means is pivoted to said second mounting means first position.
Claim 2
Dependent Claim
313 words
In combination with a lithographic printing press having a frame, a rotatable cylindrical printing surface supported by the frame, and an ink form roll contacting and applying ink to the printing surface, a dampener comprising a resilient applicator roll for applying dampening fluid to the press printing surface, a hard, smooth surfaced, hydrophilic roll for supplying dampening fluid for the applicator roll, a resilient intermediate roll for transferring dampening fluid from said hydrophilic roll to said applicator roll, first mounting means rotatably supporting said applicator roll and pivotally movable relative to the press frame to and from a first position and a second position for selectively engaging and disengaging said applicator roll in and from rolling contact with the press printing surface, second mounting means rotatably supporting said intermediate roll and pivotally movable relative to said first mounting means to and from a first position and a second position for selectively engaging and disengaging said intermediate roll in and from rolling contact with the ink form roll and alternately in and from rolling contact with said hydrophilic roll, first actuator means connected to said first mounting means for selectively pivoting said first mounting means to and from said first mounting means first and second positions, and second actuator means connected to said second mounting means for selectively pivoting said second mounting means to and from said second mounting means first and second positions, said intermediate roll simultaneously contacting said applicator roll and said hydrophilic roll when said first mounting means is pivoted to said first mounting mEans first position and said second mounting means is pivoted to said second mounting means second position and simultaneously contacting said applicator roll and the press ink form roll when said first mounting means is pivoted to said first mounting means second position and said second mounting means is pivoted to said second mounting means first position.
Claim 3
Dependent Claim
47 words
The invention defined by claim 1 wherein said second mounting means is supported on said first mounting means pivotally at the rotational axis of said applicator roll, said intermediate roll being maintained in constant contacting relation to said applicator roll whenever said second actuator means is actuated.
Claim 4
Dependent Claim
107 words
The invention defined by claim 2 wherein said second actuator means is provided with a pair of pivot connections, one of said pivot connections coupling said second actuator means to the press frame and the other of said pivot connections coupling said second actuator means to said second mounting means, said second actuator means pivot connections being located in a manner whereby actuation of said first actuator means to move said first mounting means to said first mounting means second position causes said applicator roll to be disengaged from contacting the press printing surface and subsequently said intermediate roll to be disengaged from contacting said hydrophilic roll.
Claim 5
Dependent Claim
345 words
In combination with a lithographic printing press having a frame, a rotatable cylindrical printing surface supported by the frame, and an ink form roll contacting and applying ink to the printing surface, a dampener comprising a resilient applicator roll for applying dampening fluid to the press printing surface, a distributor roll for evenly distributing any ink film retained on the surface of said applicator roll, a hard, smooth surface, hydrophilic roll for supplying dampening fluid for the applicator roll, a resilient intermediate roll for transferring dampening fluid from said hydrophilic roll to said applicator roll, first mounting means rotatably supporting said applicator roll and pivotally movable relative to the press frame to and from a first position and a second position for selectively engaging and disengaging said applicator roll in and from rolling contact with the press printing surface, second mounting means rotatably supporting said distributor roll and said intermediate roll spaced from said distributor roll and pivotally movable relative to said first mounting means to and from a first position and a second position for selectively engaging and disengaging said distributor roll in and from rolling contact with the ink form roll and alternately said intermediate roll in and from rolling contact with said hydrophilic roll, first actuator means connected to said first mounting means for selectively pivoting said first mounting means to and from said first mounting means first and second positions, and second actuator means connected to said second mounting means for selectively pivoting said second mounting means to and from said second mounting means first and second positions, said intermediate roll simultaneously contacting said applicator roll and said hydrophilic roll when said first mounting means is pivoted to said first mounting means first position and said second mounting means is pivoted to said second mounting means second position, and said distributor roll simultaneously contacting said applicator roll and the press ink form roll when said first mounting means is pivoted to said first mounting means second position and said second mounting means is pivoted to said second mounting means first position.
Claim 6
Dependent Claim
345 words
In combination with a lithographic printing press having a frame, a rotatable cylindrical printing surface supported by the frame, and an ink form roll contacting and applying ink to the printing surface, a dampener comprising a resilient applicator roll for applying dampening fluid to the press printing surface, a distributor roll for evenly distributing any ink film retained on the surface of said applicator roll, a hard, smooth surface, hydrophilic roll for supplying dampening fluid for the applicator roll, a resilient intermediate roll for transferring dampening fluid from said hydrophilic roll to said applicator roll, first mounting means rotatably supporting said applicator roll and pivotally movable relative to the press frame to and from a first position and a second position for selectively engaging and disengaging said applicator roll in and from rolling contact with the press printing surface, second mounting means rotatably supporting said distributor roll and said intermediate roll spaced from said distributor roll and pivotally movable relative to said first mounting means to and from a first position and a second position for selectively engaging and disengaging said distributor roll in and from rolling contact with the ink form roll and alternately said intermediate roll in and from rolling contact with said hydrophilic roll, first actuator means connected to said first mounting means for selectively pivoting said first mounting means to and from said first mounting means first and second positions, and second actuator means connected to said second mounting means for selectively pivoting said second mounting means to and from said second mounting means first and second positions, said intermediate roll simultaneously contacting said applicator roll and said hydrophilic roll when said first mounting means is pivoted to said first mounting means first position and said second mounting means is pivoted to said second mounting means second position, and said distributor roll simultaneously contacting said applicator roll and the press ink form roll when said first mounting means is pivoted to said first mounting means second position and said second mounting means is pivoted to said second mounting means first position.
Claim 7
Dependent Claim
51 words
The invention defined by claim 4 wherein said second mounting means is supported on said first mounting means pivotally at the rotational axis of said applicator roll, said distributor roll and said intermediate roll being maintained in constant contacting relation to said applicator roll whenever said second actuator means is actuated.
Claim 8
Dependent Claim
107 words
The invention defined by claim 5 wherein said second actuator means is provided with a pair of pivot connections, one of said pivot connections coupling said second actuator means to the press frame and the other of said pivot connections coupling said second actuator means to said second mounting means, said second actuator means pivot connections being located in a manner whereby actuation of said first actuator means to move said first mounting means to said first mounting means second position causes said applicator roll to be disengaged from contacting the press printing surface and subsequently said intermediate roll to be disengaged from contacting said hydrophilic roll.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |