US5495801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive tacky printing roller for removing printing inks from a printing plate
Assignee: Individual
•
Filing: 1994-06-24
•
Granted: 1996-03-05
•
Expires: 2014-06-24
Abstract
Abstract A printing roller, or form roller, having sufficient pressure-sensitive tack for cleanly removing ink from non-image areas of a waterless planographic plate irrespective of the tackiness of the ink. The roller can be fabricated with the necessary pressure-sensitive tack by disposing a coated sleeve, or coating layer, upon the peripheral surface of a standard roller base. The surface of the coating is elastomeric. Elastomers that will work with this invention can be selected from a group consisting of: butyl rubber, nitrile rubber, styrene butadiene, polychoroprene, polysulfide, polyurethane, polyolefin, polyvinyl acetate, acrylics, gelatine/aldehyde, epoxies, and combinations thereof.
Inventors
- 👤 Fred Dankert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:07
CPC Classifications
B; B41; B41N; B41N7/00; B41N3/00; B41N3/006; B41N2207/00; B41N2207/02; B41N2207/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A printing roller having a pressure-sensitive tack for cleanly removing inks from non-image areas of a waterless planographic plate, said printing roller comprising a roller base having a pressure-sensitive tack for cleanly removing said ink from said non-image areas of said waterless planographic plate, irrespective of a wide range of tackiness characteristics of inks, a material for said roller base providing a pressure-sensitive tacky surface, and comprising in admixture a liquid butadiene acrylonitrile copolymer and a liquid epoxide terminated polysulfide in an approximate ratio by weight of at least 2:1 butadiene acrylonitrile copolymer to expoxide terminated polysulfide.
Claim 2
Dependent Claim
97 words
A printing roller having a pressure-sensitive tack for cleanly removing inks from non-image areas of a waterless planographic plate, said printing roller comprising a roller base having a pressure-sensitive tack for cleanly removing said ink from said non-image areas of said waterless planographic plate, irrespective of a wide range of tackiness characteristics of inks, a material for said roller base providing a pressure-sensitive tacky surface, and comprising in admixture a liquid butadiene acrylonitrile copolymer and a liquid epoxide terminated polysulfide in an approximate ratio by weight of at least 2:1 butadiene acrylonitrile copolymer to expoxide terminated polysulfide.
Claim 3
Dependent Claim
29 words
The printing roller in accordance with claim 1, wherein said material providing a pressure-sensitive tack forms part of a coating disposed on a peripheral surface of said roller base.
Claim 4
Dependent Claim
16 words
The printing roller in accordance with claim 1, wherein said admixture further comprising a filler material.
Claim 5
Dependent Claim
14 words
The printing roller accordance with claim 3, wherein said filler material comprises titanium dioxide.
Claim 6
Dependent Claim
16 words
The printing roller in accordance with claim 1, wherein said printing roller comprises a form roller.
Claim 7
Dependent Claim
36 words
The printing roller in accordance with claim 1, wherein said roller base has an uncoated peripheral surface, and said pressure-sensitive tack surface forms part of a sleeve disposed upon said peripheral surface of said roller base.
References Cited (Backward Citations)
US2088471A
Cited
US2278982A
Cited
US3387074A
Cited
US3293728A
Cited
US3724047A
Cited
US3800366A
Cited
US4038731A
Cited
US4296172A
Cited
US4403550A
Cited
JPS60231763A
Cited
US4751127A
Cited
US4829645A
Cited
US5207158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |