Patent US3616178A successfully refreshed from Google Patents.
US3616178A
Expired / Lapsed
US
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Anchor-coated biaxially stress-oriented plastic sheet laminated to rubber-coated paper for use as letterpress and offsetprinting blanket
Assignee: Signal Applied Technologies Inc
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Filing: 1969-04-11
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Granted: 1971-10-26
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Expires: 1989-04-11
Abstract
Abstract Slippage resistant, flexible packing blankets for letterpress and printing blankets for offset are made from a high tensile strength, biaxially stress-oriented plastic sheet which is adhesively laminated to a tough, dimensionally stable, high tensile strength, tear-resistant paper, such as Kraft paper, tympan paper or elastomer impregnated paper sheet. An extensible thermosetting adhesive consisting essentially of an aliphatic copolyester ofterephthalic acid or an elastic ester-amide polymer, each reacted with a polyisocyanate curing agent, is used for laminating. The adhesive is cured at room temperature or at a temperature below that which relaxes the stress-oriented plastic sheet. Superior wear-resistance and high quality of printing have been demonstrated for the blankets of the invention. The blanket is useful as an inking member, for example in letterpress printing of the wraparound press-type, and can also be used for the packing material for the impression cylinder in gravure-type of printing.
Inventors
- 👤 Emanuel Gurin
- 👤 Antonio Vazquez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:52
CPC Classifications
B; B41; B41N; B41N10/00; B41N10/02; B41N10/04; B41N2210/00; B41N2210/02; B41N2210/04; B41N2210/06; B41N2210/14; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/28; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
An elastomeric flexible laminated blanket as claimed in claim 1 for use, vulcanized elastomer-side up, as a top packing blanket for letterpress, wherein said anchor coating is applied to the outer surface of said plastic sheet which is on the bottom of the blanket.
Claim 2
Dependent Claim
46 words
An elastomeric flexible laminated blanket as claimed in claim 1 for use, plastic-side up, as a top packing blanket for letterpress, wherein said anchor coating is applied to the outer surface of said vulcanized elastomer coated paper which is adapted to be pressed against the cylinder.
Claim 3
Dependent Claim
66 words
An elastomeric flexible laminated blanket as claimed in claim 1 for use, vulcanized elastomer-side up, as an offset printing blanket, wherein said vulcanized elastomer layer is between 0.003 and 0.025 inches in thickness, said paper is between 0.003 and 0.028 inches in thickness, and said plastic sheet has a thickness of 0.0005 to 0.016 inches and is provided on its outer side with said antislipping coating.
Claim 4
Dependent Claim
183 words
A two-piece blanket assembly comprising an underpacking and a top laminated flexible blanket consisting essentially of: a tough smooth dimensionally stable high tensile strength, tear-resistant paper selected from the group consisting of Kraft paper, tympan paper and latex-impregnated paper; said paper being coated with a solvent-resistant vulcanized elastomer having a Shore A Durometer hardness value between about 30 and about 95; said paper being adhesively laminated to a biaxially stress-oriented plastic sheet selected from the group consisting of polyethylene terephthalate and cellulose acetate; the adhesive of said laminate consisting essentially of an aliphatic copolyester of terephthalic acid reacted with a polyisocyanate curing agent or an elastic ester amide polymer reacted with a polyisocyanate curing agent, said adhesive being a thermosetting extensible elastic material having rapid recovery and being cured at a temperature below the relaxation temperature of the plastic sheet; and an antislip solvent-resistant anchor coating for the outside of said blanket on the plastic side, said anchor coating being selected from the group consisting of a nonblocking friction coating and a pressure-sensitive adhesive coating which prevent creeping of said blanket during printing.
Claim 5
Dependent Claim
29 words
A two-piece blanket assembly as claimed in claim 5, wherein said anchor coating is a solvent-resistant pressure-sensitive adhesive which comes into contact with the metal of the supporting cylinder.
Claim 6
Dependent Claim
28 words
A two-piece blanket assembly as claimed in claim 5, wherein said anchor coating is a pressure-sensitive adhesive which comes into contact with the metal of the supporting cylinDer.
Claim 7
Dependent Claim
20 words
The product of claim 1 used as the inking member of a letterpress of the type known as wraparound press.
Claim 8
Dependent Claim
18 words
The product of claim 1 used as a packing material for the impression cylinder of a gravure press.
Claim 9
Independent Claim
177 words
A method of manufacturing an elastomeric flexible laminated blanket comprising: coating and vulcanizing a tough smooth dimensionally stable high tensile strength, tear-resistant paper selected from the group consisting of Kraft paper, tympan paper and latex-impregnated paper with a solvent-resistant elastomer having a Shore A Durometer hardness value between about 30 and about 95; adhesive laminating said coated and vulcanized paper to a biaxially stress-oriented plastic sheet selected from the group consisting of polyethylene terephthalate and cellulose acetate; the adhesive of said laminate consisting essentially of an aliphatic copolyester of terephthalic acid reacted with a polyisocyanate curing agent or an elastic ester amide polymer reacted with a polyisocyanate curing agent, said adhesive being a thermosetting extensible elastic material having rapid recovery; curing the adhesive of said laminate at a temperature below the relaxation temperature of the plastic sheet; and coating the outside of the blanket with an antislip, solvent-resistant anchor coating, said anchor coating being selected from the group consisting of a nonblocking friction coating and a pressure-sensitive adhesive coating which prevents creeping of said blanket during printing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |