US3685446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated plastic duplicating masters
Assignee: HAROLD J DONALD
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Filing: 1969-07-03
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Granted: 1972-08-22
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Expires: 1989-07-03
Abstract
Abstract Plastic duplicating masters comprising a film of sulfonated plastic on which is fused an imaged coating of a duplicating composition such as a lithographic or hectographic composition. The imaged coating is obtained by exposing a composite of an original document, a transfer sheet having a fusible duplicating coating, and the sulfonated film to visible radiation, infrared radiation, or a combination of these for a short time.
Inventors
- 👤 Wilhelm E Walles
- 👤 Robert J Caiola
- 👤 Harold J Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:53
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/12; B41N1/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A duplicating master having a coating thereon corresponding to the characters of an original document comprising a sulfonatable polymer base, a water receptive surface thereon comprising the polymer having a plurality of sulfonic acid groups attached thereto in an amount of from about 0.0001 to about 5 milligrams sulfur trioxide equivalents per square centimeter in which said sulfonic acid groups are treated with water-soluble metal salt, water-soluble amine, aqueous ammonia solution or gaseous ammonia to form sulfonic acid salt groups, and a patterned coating of a fusible, hydrophobic composition on said surface.
Claim 2
Dependent Claim
54 words
irradiating the original with sufficient light rays to generate heat in the imaged portions of the original document, which heat is then conducted to the coated transfer sheet and which causes the coating to melt and transfer to the sulfonated master sheet in the areas coRresponding to the imaged portions of the original document.
Claim 3
Dependent Claim
54 words
irradiating the original with sufficient light rays to generate heat in the imaged portions of the original document, which heat is then conducted to the coated transfer sheet and which causes the coating to melt and transfer to the sulfonated master sheet in the areas corresponding to the imaged portions of the original document.
Claim 4
Dependent Claim
24 words
A duplicating master as set forth in claim 2 in which said sulfonic acid groups are treated with aqueous ammonia solution or gaseous ammonia.
Claim 5
Dependent Claim
33 words
A duplicating master as set forth in claim 2 in which said sulfonic acid groups are treated with water-soluble salts of the light metals of Group IA and IIA of the Periodic Chart.
Claim 6
Dependent Claim
63 words
A duplicating master having a coating thereon corresponding to the characters of an original document comprising a sulfonatable polymer base, a surface thereon comprising the polymer having a plurality of sulfonic acid groups attached thereto in an amount of from about 0.0001 to about 5 milligrams sulfur trioxide equivalents per square centimeter and patterned coating of a fusible hectographic composition on said surface.
Claim 7
Dependent Claim
90 words
A duplicating master having a coating thereon corresponding to the characters of an original document comprising a sulfonatable polymer base, a surface thereon comprising the polymer having a plurality of sulfonic acid groups attached thereto in an amount of from about 0.0001 to about 5 milligrams sulfur trioxide equivalents per square centimeter in which said sulfonic acid groups are treated with water-soluble metal salt, water-soluble amine, aqueous ammonia solution or gaseous ammonia to form sulfonic acid salt groups, and a patterned coating of a fusible hectographic composition on said surface.
Claim 8
Dependent Claim
63 words
A process for making an imaged duplicating master from an original document having imaged portions, a surface sulfonated plastic master sheet having a water receptive surface containing a plurality of sulfonic acid groups in an amount of from about 0.0001 to about 5 milligrams of sulfur trioxide equivalents per square centimeter and a transfer sheet coated with a fusible, hydrophobic composition which comprises:
Claim 9
Dependent Claim
46 words
The process as set forth in claim 7 wherein the master sheet has, prior to placing it in contact with the original and the transfer sheet, been treated with water-soluble metal salt, water-soluble amine, aqueous ammonia solution or gaseous ammonia to form sulfonic acid salt groups.
Claim 10
Dependent Claim
61 words
A process for making an imaged duplicating master from an original document having imaged portions, a surface sulfonated plastic master sheet having a surface containing a plurality of sulfonic acid groups in an amount of from about 0.0001 to about 5 milligrams of sulfur trioxide equivalents per square centimeter and a transfer sheet coated with a fusible hectographic composition which comprises:
Claim 11
Dependent Claim
44 words
The process according to claim 9 wherein the master sheet has, prior to placing it in contact with the original and the transfer sheet, been treated with water-soluble metal salt, water-soluble amine, aqueous ammonia solution or gaseous ammonia to form sulfonic acid salt groups.
References Cited (Backward Citations)
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |