US3763778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for surface maintenance of printing press blanket cylinders
Assignee: RYCO GRAPHIC Manufacturing INC US
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Filing: 1972-02-28
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Granted: 1973-10-09
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Expires: 1992-02-28
Abstract
Abstract A movable brush, preferably in the form of a rotatable brush roller, is positioned with its peripheral portions in contact with the surface of the blanket cylinder of an offset printing press during the printing operation. The speed of the brush may be controlled by various means disclosed so that the surface speed of the brush differs from the surface speed of the blanket cylinder.
Inventors
- 👤 D Sills
- 👤 H Queen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
B; B41; B41F; B41F35/00; B41F35/06; B41P; B41P2235/00; B41P2235/10; B41P2235/20; B41P2235/23
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A method of removing lint from the printing surface portions of a blanket cylinder of a web offset printing press during printing without using solvent and without removing a substantial amount of ink, said method comprising the steps of continually contacting during normal printing operation the printing surface portions of the rotating blanket cylinder of the press with a brush after those surface portions of the blanket cylinder have printed and before they have been reinked, rotating the brush in the same tangential direction as the blanket cylinder, controlling the surface speed of the brush so that it differs from the surface speed of the blanket cylinder, and controlling the pressure of the brush against the printing surface portions of the blanket cylinder so that it is sufficient to remove lint but it is insufficient to remove a substantial amount of ink from those portions of the blanket cylinder.
Claim 2
Independent Claim
149 words
A method of removing lint from the printing surface portions of a blanket cylinder of a web offset printing press during printing without using solvent and without removing a substantial amount of ink, said method comprising the steps of continually contacting during normal printing operation the printing surface portions of the rotating blanket cylinder of the press with a brush after those surface portions of the blanket cylinder have printed and before they have been reinked, rotating the brush in the same tangential direction as the blanket cylinder, controlling the surface speed of the brush so that it differs from the surface speed of the blanket cylinder, and controlling the pressure of the brush against the printing surface portions of the blanket cylinder so that it is sufficient to remove lint but it is insufficient to remove a substantial amount of ink from those portions of the blanket cylinder.
Claim 3
Dependent Claim
30 words
The method according to claim 1 wherein the controlling of the surface speed of the brush is such that it is less than the surface speed of the blanket cylinder.
Claim 4
Dependent Claim
30 words
The method according to claim 1 wherein the controlling of the surface speed of the brush is such that it is greater than the surface speed of the blanket cylinder.
Claim 5
Dependent Claim
55 words
The method according to claim 1 wherein the controlling of the surface speed of the brush and the controlling of the pressure of the brush against the surface of the blanket cylinder are such that lint will be swept from the surface of the blanket cylinder without substantially smearing the image on the blanket cylinder.
Claim 6
Independent Claim
112 words
A method of removing lint from the surface of a blanket cylinder of a web offset printing press during printing without a substantial amount of ink and without using solvent, said method comprising the steps of contacting the surface of a rotating blanket cylinder of the press with a brush moving in the same tangential direction as the blanket cylinder during normal printing operation and with pressure sufficient to remove lint but insufficient to remove a substantial amount of ink, and controlling the surface speed of the brush so that it differs from the surface speed of the blanket cylinder, whereby the lint will be swept from the surface of the cylinder.
Claim 7
Independent Claim
112 words
A method of removing lint from the surface of a blanket cylinder of a web offset printing press during printing without a substantial amount of ink and without using solvent, said method comprising the steps of contacting the surface of a rotating blanket cylinder of the press with a brush moving in the same tangential direction as the blanket cylinder during normal printing operation and with pressure sufficient to remove lint but insufficient to remove a substantial amount of ink, and controlling the surface speed of the brush so that it differs from the surface speed of the blanket cylinder, whereby the lint will be swept from the surface of the cylinder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |