US4030416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterless printing masters
Assignee: Xerox Corp
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Filing: 1976-07-30
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Granted: 1977-06-21
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Expires: 1996-07-30
Abstract
Abstract Improved waterless lithographic plates are provided. The master which comprises a copolymer of siloxane blocks crosslinked to an elastomeric ink releasing condition and organic thermoplastic blocks which are ink accepting is imaged with a particulate material, preferably an ink accepting thermoplastic polymer, and the thermoplastic blocks heated and cooled to bond the particulate imaging material thereto.
Inventors
- 👤 Richard L. Schank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:53
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/003; G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G13/286
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A printing master having image areas of ink receptivity and nonimage areas of ink releasability comprising a substrate and an overlying layer of a copolymer of 50-99 percent by weight of siloxane groups crosslinked to an elastromeric ink releasing condition and substantially uncrosslinked organic ink-accepting thermoplastic blocks.
Claim 2
Dependent Claim
47 words
A printing master having image areas of ink receptivity and nonimage areas of ink releasability comprising a substrate and an overlying layer of a copolymer of 50-99 percent by weight of siloxane groups crosslinked to an elastromeric ink releasing condition and substantially uncrosslinked organic ink-accepting thermoplastic blocks.
Claim 3
Independent Claim
67 words
A method of printing comprising selectively inking a printing master having image areas of ink receptivity and nonimage areas of ink releasability formed of a substrate, an overlying layer of a copolymer of 50-99 percent by weight of siloxane blocks cured to an ink releasable condition and organic ink receptive thermoplastic blocks, and contacting the resultant inked master with an image receiving surface to transfer said image.
Claim 4
Independent Claim
67 words
A method of printing comprising selectively inking a printing master having image areas of ink receptivity and nonimage areas of ink releasability formed of a substrate, an overlying layer of a copolymer of 50-99 percent by weight of siloxane blocks cured to an ink releasable condition and organic ink receptive thermoplastic blocks, and contacting the resultant inked master with an image receiving surface to transfer said image.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |