US4287827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined inking and moistening roller
Assignee: Warner Autolitho Corp
•
Filing: 1979-05-17
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Granted: 1981-09-08
•
Expires: 1999-05-17
Abstract
Abstract In a lithographic printing apparatus, the rollers that supply ink and/or water to form rollers have a surface with minutely intermixed hydrophilic and oleophilic areas. The amount of water retained by a roller is dependent upon the total of the hydrophilic areas, and the amount of oil-based ink retained by the roller is dependent upon the total of the oleophilic areas. A preselected ratio of oil to water is obtained by selecting the ratio of hydrophilic areas to oleophilic areas.
Inventors
- 👤 Gordon R. Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:02
CPC Classifications
B; B41; B41N; B41N10/00; B41F; B41F7/00; B41F7/20; B41F7/24; B41F7/36; B41M; B41M1/00; B41M1/06; B41N7/00; B41N7/04; B41N2207/00; B41N2207/02; B41P; B41P2231/00; B41P2231/20; B41P2231/21
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
In a lithographic printing press, the combination of: (a) a printing press fountain having a blended mixture of water and oil-based ink; (b) a fountain roller contacting the water and ink mixture; (c) and a squeegee roller contacting the fountain roller to limit the amount of water and ink mixture carried by the fountain roller; (d) a lithographic printing plate separate from the fountain roller; (e) and means to transport the particles of water and ink from the fountain roller to the lithographic printing plate, characterized by said fountain roller having a lithographic surface of intermixed hydrophilic and oleophilic areas, whereby the fine particles of ink and water are selectively taken from the fountain and transported in measured proportions to properly ink and dampen the plate cylinder.
Claim 2
Dependent Claim
127 words
In a lithographic printing press, the combination of: (a) a printing press fountain having a blended mixture of water and oil-based ink; (b) a fountain roller contacting the water and ink mixture; (c) and a squeegee roller contacting the fountain roller to limit the amount of water and ink mixture carried by the fountain roller; (d) a lithographic printing plate separate from the fountain roller; (e) and means to transport the particles of water and ink from the fountain roller to the lithographic printing plate, characterized by said fountain roller having a lithographic surface of intermixed hydrophilic and oleophilic areas, whereby the fine particles of ink and water are selectively taken from the fountain and transported in measured proportions to properly ink and dampen the plate cylinder.
Claim 3
Dependent Claim
20 words
The combination of claim 1 wherein the fountain roller hydrophilic areas and oleophilic areas are formed in generally parallel lines.
Claim 4
Dependent Claim
21 words
The combination of claim 1 wherein means are provided for adjusting the pressure between the squeegee roller and the fountain roller.
Claim 5
Dependent Claim
22 words
The combination of claim 1 wherein part of the squeegee roller is immersed in the blended fountain mixture of water and ink.
Claim 6
Dependent Claim
48 words
The combination of claim 1 wherein the fountain mixture of water amd oil-based ink has a surface, part of the squeegee roller is immersed in the fountain mixture, and the nip between the fountain roller and the squeegee roller is substantially at said surface of the fountain mixture.
References Cited (Backward Citations)
US2090704A
Cited
US2016085A
Cited
US2406057A
Cited
US2690119A
Cited
US3213787A
Cited
GB903724A
Cited
US3285169A
Cited
US3422759A
Cited
US3645202A
Cited
US3902417A
Cited
US4176605A
Cited
US4211167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |