Patent US4112178A successfully refreshed from Google Patents.
US4112178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polyurethane undercoats
Assignee: Columbia Ribbon and Carbon Manufacturing Co Inc
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Filing: 1977-07-14
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Granted: 1978-09-05
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Expires: 1997-07-14
Abstract
Abstract Pressure-sensitive transfer elements comprising water-applied resinous base coating supporting a resinous ink-releasing layer, characterized by the undercoating consisting essentially of a water-dispersible, water-insoluble hydrophilic polyurethane resin.
Inventors
- 👤 Albert E. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
Pressure-sensitive transfer element comprising a smooth, non-tacky base layer of water-applied polyurethane resin having bonded to the smooth surface thereof, a volatile-solvent-applied pressure-sensitive ink-releasing microporous resinous layer containing within the pores thereof pressure-exudable ink comprising oleaginous material and coloring matter, said base layer being impermeable and insoluble with respect to the volatile vehicle used to apply the ink layer and being inert to the penetration of the oily ink vehicle of the ink layer present thereon.
Claim 2
Dependent Claim
76 words
Pressure-sensitive transfer element comprising a smooth, non-tacky base layer of water-applied polyurethane resin having bonded to the smooth surface thereof, a volatile-solvent-applied pressure-sensitive ink-releasing microporous resinous layer containing within the pores thereof pressure-exudable ink comprising oleaginous material and coloring matter, said base layer being impermeable and insoluble with respect to the volatile vehicle used to apply the ink layer and being inert to the penetration of the oily ink vehicle of the ink layer present thereon.
Claim 3
Dependent Claim
15 words
Transfer element according to claim 1 in which said base layer comprises the support therefor.
Claim 4
Dependent Claim
26 words
Transfer element according to claim 1 in which said base layer is bonded to a preformed plastic film which forms the support for said transfer element.
Claim 5
Dependent Claim
16 words
Transfer element according to claim 3 in which said plastic film is a surface-treated polyolefin film.
Claim 6
Dependent Claim
19 words
Transfer element according to claim 1 in which said water-applied polyurethane resin comprises a cross-linking agent and is cured.
Claim 7
Dependent Claim
138 words
Method for producing pressure-sensitive transfer elements comprising the steps of applying a thin layer of an aqueous polyurethane resin composition to a surface, evaporating water from said composition to form a thin smooth dry layer of said polyurethane resin, applying over said smooth dry layer a thin coating of resinous composition comprising a resinous binder material, an oleaginous pressure-flowable material which is incompatible with said binder material, coloring matter, and a volatile liquid vehicle, said smooth dry layer being impermeable and insoluble with respect to said volatile liquid vehicle and being inert to the penetration of said oleaginous pressure-flowable material, and evaporating said volatile vehicle to form a microporous layer of said resinous binder material bonded to said smooth polyurethane resin layer and containing within the pores thereof said oleaginous material and coloring matter as a pressure-exudable ink.
Claim 8
Dependent Claim
138 words
Method for producing pressure-sensitive transfer elements comprising the steps of applying a thin layer of an aqueous polyurethane resin composition to a surface, evaporating water from said composition to form a thin smooth dry layer of said polyurethane resin, applying over said smooth dry layer a thin coating of resinous composition comprising a resinous binder material, an oleaginous pressure-flowable material which is incompatible with said binder material, coloring matter, and a volatile liquid vehicle, said smooth dry layer being impermeable and insoluble with respect to said volatile liquid vehicle and being inert to the penetration of said oleaginous pressure-flowable material, and evaporating said volatile vehicle to form a microporous layer of said resinous binder material bonded to said smooth polyurethane resin layer and containing within the pores thereof said oleaginous material and coloring matter as a pressure-exudable ink.
Claim 9
Dependent Claim
41 words
Method according to claim 6 in which said surface to which said polyurethane resin composition is applied is a casting surface, and said dry polyurethane resin layer and said bonded microporous resin layer are removed therefrom as a self-supporting transfer element.
Claim 10
Dependent Claim
39 words
Method according to claim 6 in which said surface to which said polyurethane resin composition is applied is a thin preformed film of surface-treated polyolefin, which film bonds to said polyurethane layer as a support for said transfer element.
Claim 11
Dependent Claim
28 words
Method according to claim 6 in which said polyurethane resin composition contains a cross-linking agent and said polyurethane layer is cured prior to application of said microporous layer.
Claim 12
Dependent Claim
17 words
Method according to claim 6 in which said volatile liquid vehicle of said resinous composition comprises water.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |