US3926701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and covering fabric for a damping form roller of an offset printing machine
Assignee: Unitika Ltd
•
Filing: 1973-09-26
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Granted: 1975-12-16
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Expires: 1993-09-26
Abstract
Abstract A cylindrical fabric covering of a larger diameter than a form roller of an offset printing machine contains a water shrinkable ground yarn and a hydrophilic pile yarn. The pile yarn can be cut to the desired size and the cylindrical fabric is securely fastened to the form roller by submerging the cylindrical fabric and roller in water until the fabric shrinks firmly on the roller. The resulting firmly fixed fabric covering largely eliminates the generation of lint or fluff with its resulting effects on the prints.
Inventors
- 👤 Hiroshi Nishiwaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:22
CPC Classifications
D; D04; D04B; D04B1/00; D04B1/14; D04B1/16; B; B41; B41L; B41L25/00; B41L25/18; B41N; B41N7/00; B41N7/04; B41N2207/00; B41N2207/02; B41N2207/14; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1348; Y10T428/1352; Y10T428/1372; Y10T428/23907; Y10T428/23979
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
FORMING A CYLINDRICAL COVER FROM A FABRIC COMPRISING: A. PILE YARNS COMPOSED OF HYDROPHILIC VEGETABLE OR REGENERATED FIBERS AND B. GROUND YARNS COMPOSED OF LIGHTLY HEAT-TREATED AND NONACETALIZED MULTIFILAMENT POLYVINYL ALCOHOL FIBERS, SAID MULTIFILAMENT POLYVINYL ALCOHOL FIBERS BEING CAPABLE OF SHRINKING BY 27-40% IN THE DIRECTION OF THE LENGTH THEREOF WHEN MOISTENED WITH WATER IN THE ABSENCE OF PREVIOUS STRETCHING;
Claim 2
Dependent Claim
60 words
FORMING A CYLINDRICAL COVER FROM A FABRIC COMPRISING: A. PILE YARNS COMPOSED OF HYDROPHILIC VEGETABLE OR REGENERATED FIBERS AND B. GROUND YARNS COMPOSED OF LIGHTLY HEAT-TREATED AND NONACETALIZED MULTIFILAMENT POLYVINYL ALCOHOL FIBERS, SAID MULTIFILAMENT POLYVINYL ALCOHOL FIBERS BEING CAPABLE OF SHRINKING BY 27-40% IN THE DIRECTION OF THE LENGTH THEREOF WHEN MOISTENED WITH WATER IN THE ABSENCE OF PREVIOUS STRETCHING;
Claim 3
Dependent Claim
127 words
IN CYLINDRICAL DAMPING FORM COVERS WHICH ARE WATERSHRINDABLE OVER DAMPING FORM ROLLERS, THE IMPROVEMENT WHEREIN A DAMPING FORM COVER COMPRISES PILE YARNS COMPOSED OF HYDROPHILIC VEGETABLE OR REGENERATED FIBERS AND GROUND YARNS COMPOSED OF LIGHTLY HEAT-TREATED AND NONACETALIZED MULTIFILAMENT POLYVINYL ALCOHOL FIBERS, SAID MULTIFILAMENT POLYVINYL ALCOHOL FIBERS BEING CAPABLE OF SHRINKING BY 27-40% IN THE DIRECTION OF THE LENGTH THEREOF WHEN MOISTENED WITH WATER IN THE ABSENCE OF PREVIOUS STRECHING, WHEREBY SAID DAMPING FORM COVER MAY BE FIXED FIRMLY ON A DAMPING FORM ROLLER 5% OR LESS SMALLER IN DIAMETER THAN SAID DAMPING FORM COVER DUE TO THE SHRINKAGE OF THE GROUND YARNS WHEN THE ROLLER IS INSERTED THEREIN, BOTH ENDS OF THE DAMPING FORM COVER ARE FIXED WITH FIBERS, AND THE ROLLER AND COVER ARE MOISTENED.
Claim 4
Dependent Claim
127 words
IN CYLINDRICAL DAMPING FORM COVERS WHICH ARE WATERSHRINDABLE OVER DAMPING FORM ROLLERS, THE IMPROVEMENT WHEREIN A DAMPING FORM COVER COMPRISES PILE YARNS COMPOSED OF HYDROPHILIC VEGETABLE OR REGENERATED FIBERS AND GROUND YARNS COMPOSED OF LIGHTLY HEAT-TREATED AND NONACETALIZED MULTIFILAMENT POLYVINYL ALCOHOL FIBERS, SAID MULTIFILAMENT POLYVINYL ALCOHOL FIBERS BEING CAPABLE OF SHRINKING BY 27-40% IN THE DIRECTION OF THE LENGTH THEREOF WHEN MOISTENED WITH WATER IN THE ABSENCE OF PREVIOUS STRECHING, WHEREBY SAID DAMPING FORM COVER MAY BE FIXED FIRMLY ON A DAMPING FORM ROLLER 5% OR LESS SMALLER IN DIAMETER THAN SAID DAMPING FORM COVER DUE TO THE SHRINKAGE OF THE GROUND YARNS WHEN THE ROLLER IS INSERTED THEREIN, BOTH ENDS OF THE DAMPING FORM COVER ARE FIXED WITH FIBERS, AND THE ROLLER AND COVER ARE MOISTENED.
Claim 5
Independent Claim
17 words
A METHOD OF COVERING A DAMPING FORM ROLLER FOR AN OFFSET PRINTING MACHINE COMPRISING THE STEPS OF:
Claim 6
Independent Claim
17 words
A METHOD OF COVERING A DAMPING FORM ROLLER FOR AN OFFSET PRINTING MACHINE COMPRISING THE STEPS OF:
Claim 7
Dependent Claim
8 words
INSERTING THE ROLLER INTO THE CYLINDRICAL COVER; AND
Claim 8
Dependent Claim
8 words
INSERTING THE ROLLER INTO THE CYLINDRICAL COVER; AND
Claim 9
Dependent Claim
24 words
WETTING THE ROLLER AND CYLINDRICAL FABRIC WITH WATER UNTIL THE CYLINDRICAL FABRIC HAS SHRUNK SUFFICIENTLY TO FIRMLY POSITION THE CYLINDRICAL FABRIC ON THE ROLLER.
Claim 10
Dependent Claim
24 words
WETTING THE ROLLER AND CYLINDRICAL FABRIC WITH WATER UNTIL THE CYLINDRICAL FABRIC HAS SHRUNK SUFFICIENTLY TO FIRMLY POSITION THE CYLINDRICAL FABRIC ON THE ROLLER.
Claim 11
Dependent Claim
24 words
wetting the roller and cylindrical fabric with water until the cylindrical fabric has shrunk sufficiently to firmly position the cylindrical fabric on the roller.
Claim 12
Dependent Claim
24 words
wetting the roller and cylindrical fabric with water until the cylindrical fabric has shrunk sufficiently to firmly position the cylindrical fabric on the roller.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |