US3961947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing waterless lithographic masters
Assignee: Xerox Corp
•
Filing: 1973-10-19
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Granted: 1976-06-08
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Expires: 1993-10-19
Abstract
Abstract A novel method of preparing a waterless lithographic master and a method of printing therefrom are provided. To prepare the printing master, a suitable ink accepting substrate such as aluminum, paper or plastic, is coated with a silicone gum curing catalyst, preferably suspended in a hydrophilic binder. A barrier fusable particulate hydrophobic image pattern is then deposited on said coated substrate and fused to mask said curing catalyst in the image areas. The substrate is then coated with an uncured silicone gum, preferably as an aqueous emulsion so that the gum does not adhere to the hydrophobic image pattern. The silicone gum is then cured in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas. The method of printing comprises the additional steps of applying ink to the imaged master and contacting the inked master with an image receiving surface to thereby transfer the inked image.
Inventors
- 👤 John B. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:52
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/003; G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G13/286; B41C; B41C2210/00; B41C2210/16
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
90 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting substrate, b. coating said substrate with a silicone gum curing catalyst, c. depositing a barrier fusible hydrophobic particulate image pattern on said coated substrate to mask said curing catalyst in the image areas, d. fusing said particulate image pattern, e. coating the resultant substrate with a curable silicone gum as an aqueous emulsion; and f. curing said silicone gum in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 2
Independent Claim
90 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting substrate, b. coating said substrate with a silicone gum curing catalyst, c. depositing a barrier fusible hydrophobic particulate image pattern on said coated substrate to mask said curing catalyst in the image areas, d. fusing said particulate image pattern, e. coating the resultant substrate with a curable silicone gum as an aqueous emulsion; and f. curing said silicone gum in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 3
Independent Claim
96 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting substrate, b. coating said substrate with a silicone gum curing catalyst, c. depositing a barrier fusible particulate image pattern on said coated substrate to mask said curing catalyst in the image areas, d. fusing said particulate image pattern, e. coating the resultant substrate with a curable silicone gum; and f. curing said silicone gum in the nonimage areas and removing the uncured gum, curing catalyst and particulate image pattern to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 4
Independent Claim
96 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting substrate, b. coating said substrate with a silicone gum curing catalyst, c. depositing a barrier fusible particulate image pattern on said coated substrate to mask said curing catalyst in the image areas, d. fusing said particulate image pattern, e. coating the resultant substrate with a curable silicone gum; and f. curing said silicone gum in the nonimage areas and removing the uncured gum, curing catalyst and particulate image pattern to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein the substrate of (a) comprises an ink receptive resilient material.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the particulate image pattern is fused by solvent vapor.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein the particulate image pattern is fused by heat.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the silicone gum is cured by heat.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the particulate image pattern is deposited on a substrate and transferred to the coated substrate of step (c).
Claim 10
Independent Claim
80 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting hydrophilic substrate, b. coating said substrate with a silicone gum curing catalyst in a hydrophilic binder, c. depositing a fusible particulate hydrophobic image pattern on said coated substrate, d. fusing said particulate image pattern, e. coating the resultant substrate with an aqueous curable silicone gum emulsion, and f. curing said silicone gum emulsion to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 11
Independent Claim
80 words
A method of preparing a waterless lithographic master comprising: a. providing a suitable ink accepting hydrophilic substrate, b. coating said substrate with a silicone gum curing catalyst in a hydrophilic binder, c. depositing a fusible particulate hydrophobic image pattern on said coated substrate, d. fusing said particulate image pattern, e. coating the resultant substrate with an aqueous curable silicone gum emulsion, and f. curing said silicone gum emulsion to selectively provide ink receptive image areas and ink releasing nonimage areas.
Claim 12
Dependent Claim
16 words
The process of claim 8 wherein the substrate of (a) comprises an ink receptive resilient material.
Claim 13
Dependent Claim
15 words
The process of claim 8 wherein the particulate image pattern is fused by solvent vapor.
Claim 14
Dependent Claim
14 words
The process of claim 8 wherein the particulate image pattern is fused by heat.
Claim 15
Dependent Claim
13 words
The process of claim 8 wherein the silicone gum is cured by heat.
Claim 16
Dependent Claim
24 words
The process of claim 8 wherein the particulate image pattern is deposited on a substrate and transferred to the coated substrate of step (c).
Claim 17
Independent Claim
85 words
A method of preparing a waterless lithographic master comprising: a. coating a suitable substrate with a curable silicone gum, b. depositing a barrier fusible particulate image pattern on said coated substrate, c. fusing said particulate image pattern, d. coating the resultant substrate with a silicone gum curing catalyst, and e. curing said silicone gum in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas, and removing the uncured gum, particulate image pattern and curing catalyst in the image areas.
Claim 18
Independent Claim
85 words
A method of preparing a waterless lithographic master comprising: a. coating a suitable substrate with a curable silicone gum, b. depositing a barrier fusible particulate image pattern on said coated substrate, c. fusing said particulate image pattern, d. coating the resultant substrate with a silicone gum curing catalyst, and e. curing said silicone gum in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas, and removing the uncured gum, particulate image pattern and curing catalyst in the image areas.
Claim 19
Dependent Claim
16 words
The process of claim 14 wherein the substrate of (a) comprises an ink receptive resilient material.
Claim 20
Dependent Claim
15 words
The process of claim 14 wherein the particulate image pattern is fused by solvent vapor.
Claim 21
Dependent Claim
14 words
The process of claim 14 wherein the particulate image pattern is fused by heat.
Claim 22
Dependent Claim
13 words
The process of claim 14 wherein the silicone gum is cured by heat.
Claim 23
Dependent Claim
24 words
The process of claim 14 wherein the particulate image pattern is deposited on a substrate and transferred to the coated substrate of step (c).
Claim 24
Dependent Claim
51 words
A method of printing with the master of claim 1 wherein following curing of the silicone to selectively provide ink receptive areas and ink releasing nonimage areas, ink is applied to said ink receptive image areas and the master contacted with an image receiving surface to thereby transfer the inked image.
Claim 25
Dependent Claim
62 words
A method of printing with the master of claim 1 wherein following curing of the silicone and removal of the uncured gum, catalyst and particulate image pattern to selectively provide ink receptive areas and ink releasing nonimage areas, ink is applied to said ink receptive image areas and the master contacted with an image receiving surface to thereby transfer the inked image.
Claim 26
Dependent Claim
37 words
A method of printing with the master of claim 6 wherein following curing, ink is applied to said ink receptive image areas and the master contacted with an image receiving surface to thereby transfer the inked image.
Claim 27
Dependent Claim
51 words
A method of printing with the master of claim 11 wherein following curing of the silicone to selectively provide ink receptive areas and ink releasing nonimage areas, ink is applied to said ink receptive image areas and the master contacted with an image receiving surface to thereby transfer the inked image.
Claim 28
Dependent Claim
62 words
A method of printing with the master of claim 11 wherein following curing of the silicone and removal of the uncured gum, catalyst and particulate image pattern to selectively provide ink receptive areas and ink releasing nonimage areas, ink is applied to said ink receptive image areas and the master contacted with an image receiving surface to thereby transfer the inked image.
Claim 29
Dependent Claim
11 words
The method of claim 1 wherein the image is electrophotographically formed.
Claim 30
Dependent Claim
11 words
The method of claim 2 wherein the image is electrophotographically formed.
Claim 31
Dependent Claim
11 words
The method of claim 8 wherein the image is electrophotographically formed.
Claim 32
Dependent Claim
11 words
The method of claim 14 wherein the image is electrophotographically formed.
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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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |