US4260664A
Expired / Lapsed
US
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Transfer elements and process
Assignee: Columbia Ribbon and Carbon Manufacturing Co Inc
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Filing: 1978-11-27
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Granted: 1981-04-07
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Expires: 1998-11-27
Abstract
Abstract Pressure-sensitive transfer elements having a polyolefin film foundation carrying a solvent-applied, pressure-transferable complete-release or "correctable" imaging layer comprising a normally-hard resinous binder material, a non-hydroxylated fatty acid oil plasticizer, such as rapeseed oil, which softens or embrittles the resin, a metal salt of a C10 to C30 fatty acid, such as zinc stearate, which gels the fatty acid oil, and a quantity of coloring matter. The oil plasticizer of the transfer layer is rendered non-migratory and does not penetrate the polyolefin film foundation, even over an extended period of time, and the transfer layer has excellent cohesive properties and excellent frangibility whereby it transfers readily and completely to a copy paper from the film foundation and yet, according to one embodiment, can be removed completely and cleanly from the copy paper by means of conventional lift-off ribbons or tapes.
Inventors
- 👤 George P. Dapp
- 👤 Michael A. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/269; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
Pressure-sensitive transfer element of the complete release type comprising a thin flexible polyolefin film foundation having thereon a thin, dry, hard, pressure-transferable imaging layer comprising 1.0 part by weight of a normally-hard synthetic resinous binder material, from about 0.5 part to 1.5 parts by weight of a non-hydroxylated fatty acid oil plasticizer for said binder material which is not a strong penetrant for said polyolefin film, from about 0.005 part to 0.15 part by weight of a metal salt of a C 10 to C 30 fatty acid which is a gelling agent for said oil and solidifies said oil plasticizer within said resinous binder material to prevent said oil from migrating therefrom, and an amount of coloring matter.
Claim 2
Dependent Claim
119 words
Pressure-sensitive transfer element of the complete release type comprising a thin flexible polyolefin film foundation having thereon a thin, dry, hard, pressure-transferable imaging layer comprising 1.0 part by weight of a normally-hard synthetic resinous binder material, from about 0.5 part to 1.5 parts by weight of a non-hydroxylated fatty acid oil plasticizer for said binder material which is not a strong penetrant for said polyolefin film, from about 0.005 part to 0.15 part by weight of a metal salt of a C 10 to C 30 fatty acid which is a gelling agent for said oil and solidifies said oil plasticizer within said resinous binder material to prevent said oil from migrating therefrom, and an amount of coloring matter.
Claim 3
Dependent Claim
15 words
Transfer element according to claim 1 in which said binder material comprises a polyamide resin.
Claim 4
Dependent Claim
15 words
Transfer element according to claim 1 in which said fatty acid oil comprises rapeseed oil.
Claim 5
Dependent Claim
14 words
Transfer element according to claim 1 in which said metal salt comprises zinc stearate.
Claim 6
Dependent Claim
13 words
Transfer element according to claim 1 in which said polyolefin film comprises polypropylene.
Claim 7
Dependent Claim
179 words
Process for producing a pressure-sensitive transfer element of the complete release type comprising the steps of: (a) preparing a coating composition comprising 1.0 part by weight of a normally-hard synthetic resinous binder material, from about 0.5 part to 1.5 parts by weight of a non-hydroxylated fatty acid oil plasticizer for said binder material which is not a strong penetrant for said polyolefin film, from about 0.005 part to 0.15 part by weight of a metal salt of a C 10 to C 30 fatty acid as a gelling agent for said oil which solidifies said oil plasticizer within said resinous binder material to prevent said oil from migrating therefrom, a quantity of coloring matter and a volatile coating vehicle comprising a solvent for said binder material; (b) applying said coating composition as a uniform thin layer to the surface of a thin flexible polyolefin film foundation, and (c) evaporating said volatile coating vehicle to form a uniform thin dry, hard imaging layer which is completely releasable from said film foundation in image form under the effects of imaging pressure.
Claim 8
Dependent Claim
179 words
Process for producing a pressure-sensitive transfer element of the complete release type comprising the steps of: (a) preparing a coating composition comprising 1.0 part by weight of a normally-hard synthetic resinous binder material, from about 0.5 part to 1.5 parts by weight of a non-hydroxylated fatty acid oil plasticizer for said binder material which is not a strong penetrant for said polyolefin film, from about 0.005 part to 0.15 part by weight of a metal salt of a C 10 to C 30 fatty acid as a gelling agent for said oil which solidifies said oil plasticizer within said resinous binder material to prevent said oil from migrating therefrom, a quantity of coloring matter and a volatile coating vehicle comprising a solvent for said binder material; (b) applying said coating composition as a uniform thin layer to the surface of a thin flexible polyolefin film foundation, and (c) evaporating said volatile coating vehicle to form a uniform thin dry, hard imaging layer which is completely releasable from said film foundation in image form under the effects of imaging pressure.
Claim 9
Dependent Claim
21 words
Process according to claim 6 in which said coating composition comprises a major amount by weight of said volatile coating vehicle.
Claim 10
Dependent Claim
28 words
Process according to claim 6 in which said coating composition comprises a polyamide resin, rapeseed oil, zinc stearate, coloring matter and an alcohol solvent for said polyamide resin.
Claim 11
Dependent Claim
22 words
Process according to claim 6 in which said dry imaging layer has a thickness of between about 0.00005 inch and 0.0008 inch.
Claim 12
Dependent Claim
20 words
Process according to claim 6 in which said film foundation has a thickness between about 0.0001 inch and 0.001 inch.
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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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |