US3797388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for printing by reverse lithography
Assignee: Olivetti SpA
•
Filing: 1971-12-07
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Granted: 1974-03-19
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Expires: 1991-12-07
Abstract
Abstract A reverse lithographic printing apparatus incorporating a combined inking and fountain roller is disclosed. A watermiscible ink is applied to the surface of an oil loaded, porous inking roller. A mixture of ink and oil is formed which is applied to the printing master. The oil selectively deposits on the oleophilic background portion of the master while the watermiscible ink selectively deposits on the image areas.
Inventors
- 👤 B Kaminstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:45
CPC Classifications
B; B41; B41F; B41F7/00; B41F7/20; B41F7/24; B41F7/36; B41F7/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
27 words
A system according to claim 1 in which said sleeve is formed of a tough, abrasion-resistant, resilient synthetic elastomer containing an interconnected network of open cellular pores.
Claim 2
Dependent Claim
22 words
A system according to claim 2 in which said elastomer is a polyurethane having a void volume between 20 and 80 percent.
Claim 3
Dependent Claim
34 words
A system according to claim 1 in which said mandrel is hollow forming a reservoir for said hydrophobic liquid and said mandrel is perforated for applying said liquid to the surrounding porous, absorbent sleeve.
Claim 4
Dependent Claim
50 words
A system according to claim 4 further including hydrophobic liquid regulating means connected between said mandrel and said reservoir, said hydrophobic liquid regulating means including valve means operable responsive to a pressure drop caused by loss of liquid from said mandrel for enabling replenishment of said liquid from said reservoir.
Claim 5
Dependent Claim
41 words
A system according to claim 5 in which said regulating means includes a rotary seal connected to an end member of said mandrel, a housing surrounding said seal, a closed member and conduit means connecting said housing to said closed member.
Claim 6
Dependent Claim
35 words
A system according to claim 4 in which said ink applying means includes an ink delivery roller having a soft, porous, ink loaded outer sleeve in contact with the absorbent sleeve of said roller means.
Claim 7
Dependent Claim
33 words
A system according to claim 7 in which said ink delivery roller includes a hollow, perforated mandrel forming a reservoir for said ink and said soft, porous sleeve is received on said mandrel.
Claim 8
Dependent Claim
47 words
A system according to claim 7 in which said ink applying means includes a hollow roller having a perforated outer cover enclosing a reservoir for said ink and said soft porous sleeve is in pressure contact with said cover and the outer sleeve of said roller means.
Claim 9
Dependent Claim
27 words
A system according to claim 1 in which said means for applying ink includes a fountain roller for applying ink to the outer surfaces of said ridges.
Claim 10
Dependent Claim
48 words
A system according to claim 1 in which said roller means includes a plurality of rollers having said grooved sleeves for contacting said master; the ridges of a sleeve of at least one roller overlapping the path of travel of the grooves of another sleeve over said master.
Claim 11
Independent Claim
121 words
A system for inking a printing master having shaped image regions which preferentially absorb water-miscible inks and background regions which do not absorb water-miscible inks, comprising: roller means including a rigid mandrel containing an outer sleeve of porous, liquid absorbent, compressible material; said sleeve outer surface containing a plurality of spaced slits, means for applying water-miscible ink directly to the surface of said outer sleeve; means for applying hydrophobic liquid to said surface of said outer sleeve from the interior of said roller means; and means for rolling said roller means to roll the surface of said sleeve over the surface of said master, whereby said ink is selectively deposited on said image regions and said liquid coats said background regions.
Claim 12
Dependent Claim
19 words
A system according to claim 12 in which said slits are disposed perpendicular to the axis of said mandrel.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |