US3785286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wiping cylinder of steel engraving printing machine and method of making it
Assignee: KBA Notasys SA
•
Filing: 1971-08-26
•
Granted: 1974-01-15
•
Expires: 1991-08-26
Abstract
Abstract The wiping cylinder of a steel engraving printing machine is coated with a plurality of thin plastic layers over a rubber base layer. When the wiping cylinder is to be cleaned with an organic solvent, the plastic coatings are of a thermoplastic synthetic resin that is soluble in water but not in organic solvents, for example polyvinyl alcohol that is partially saponified and contains acetyl groups. When the wiping cylinder is to be cleaned by an aqueous solution, the coatings are of a synthetic resin such as polyvinyl chloride that is not soluble in water. The thin plastic layers are applied successively by means of a doctor blade assuring smoothness, uniformity and exact thickness of the layers, and each layer is hardened before the next is applied.
Inventors
- 👤 G Giori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:50
CPC Classifications
B; B41; B41N; B41N10/00; B41N10/005; Y; Y10; Y10S; Y10S428/00; Y10S428/909
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
A wiping cylinder according to claim 1, in which said under layer has a Shore hardness of about A 65 and said cover layer has a Shore hardness of about A 90.
Claim 2
Dependent Claim
22 words
A wiping cylinder according to claim 1, in which said rubber layer has a Shore hardness between A 40 and A 90.
Claim 3
Dependent Claim
22 words
A wiping cylinder according to claim 1, in which gauze is embedded in the plastic layer immediately superposed on said rubber layer.
Claim 4
Dependent Claim
30 words
A wiping cylinder according to claim 1, in which said rubber layer is a mixture of nitrile and vinyl polymers having a Shore hardness of A 70 to A 75.
Claim 5
Dependent Claim
270 words
In a steel engraving printing machine, in combination with a plate cylinder carrying an engraved plate and means for applying ink to said plate, a wiping cylinder engaging said plate to press the ink in the engravings of the plate and to remove the ink from plenum areas of said plate, said wiping cylinder comprising a cylindrical base, a rubber layer surrounding said base and a plurality of superposed thin plastic seamless layers overlying said rubber layer, said layers comprising an inner layer having a uniform thickness of 0.1 to 0.2 mm and formed of a first homogeneous mixture having the following composition: Parts by weight Emulsion polymerized PVC 1000 Trioctyle-phosphate (TOP) 240 Dioctyle-sebacate (DOS) 120 Graphite 15 tc Calcium carbonate 15 PVC Stabilizer 10 said first mixture being heat hardened to a hardness of approximately Shore A 60 to 70, an outer layer having a uniform thickness of 0.1 to 1.0 mm and formed of a homogeneous mixture having the following composition: Parts by weight Emulsion polymerized PVC 1500 Trioctyle-phosphate (TOP) 360 Dioctyle-sebacate (SOS) 180 High molecular weight polymer plasticizer and tackifier based on dibasic fatty alcohols and acids 150 Graphite 45 Calcium carbonate 45 PVC Stabilizer 15 said second mixture being heat hardened to a hardness of approximately Shore A 80 to 95, and a plurality of intermediate layers formed of one of said compositions, each of said intermediate layers having a uniform thickness of 0.1 to 1.0 mm and the total thickness of said inner layer and intermediate layers being 1 to 4 mm, each of said plastic layers being individually heat set on the underlying layer.
References Cited (Backward Citations)
US1058040A
Cited
US2164270A
Cited
US2312853A
Cited
GB646159A
Cited
US2631358A
Cited
US2625735A
Cited
US2741297A
Cited
US2689395A
Cited
US2792321A
Cited
US2792322A
Cited
US3235772A
Cited
US3152387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |