EP0096740A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Laminated transfer medium for thermal printing and lift-off correction
Assignee: JP Morgan Delaware
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Filing: 1983-05-02
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Granted: —
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Expires: 2003-05-02
Abstract
Abstract A thermal transfer medium particularly suited to be used once for printing at one temperature and for lift-off correction at a lower temperature. The bottom, resistive layer is a blend of an aliphatic polyurethane and a urethane acrylic copolymer with conductive carbon black. The next layer is 1000 angstroms thick aluminum. The next layer is the release layer, of an ethylene organic acid copolymer, a low-melting material. The top layer is an ink layer containing ethylene vinyl acetate and polyethyacrylate. The resistive layer has a light dusting of graphite. Low print currents for both printing and lift-off correction are achieved.
Inventors
- 👤 Hugh Thomas Findlay
- 👤 Keith Alan Jones
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:57
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
100 words
A laminated transfer medium for thermal printing, of the type comprising a layer of marking material which is non-tacky and cohesive at ordinary room temperatures and which forms a bond for lift-off correction of thermal printing made from said transfer medium after having been raised to temperatures above ordinary room temperatures and below temperatures at which thermal printing by said transfer medium normally is effected, and a support layer upon which said marking material is supported, said transfer medium being characterized in that it includes a release layer comprising a low-melting material between said marking material and said support layer.
Claim 2
Dependent Claim
100 words
A laminated transfer medium for thermal printing, of the type comprising a layer of marking material which is non-tacky and cohesive at ordinary room temperatures and which forms a bond for lift-off correction of thermal printing made from said transfer medium after having been raised to temperatures above ordinary room temperatures and below temperatures at which thermal printing by said transfer medium normally is effected, and a support layer upon which said marking material is supported, said transfer medium being characterized in that it includes a release layer comprising a low-melting material between said marking material and said support layer.
Claim 3
Dependent Claim
16 words
The transfer medium as in claim 1 in which said release layer is predominantly an alkane.
Claim 4
Dependent Claim
19 words
The transfer medium as in claim 1 in which said release layer has a softening point of about 108°C.
Claim 5
Dependent Claim
30 words
The transfer medium as in claim 1, 2 or 3 in which said marking material is a blend comprising ethylene vinyl acetate copolymer, a compatible acrylic polymer, and carbon black.
Claim 6
Dependent Claim
47 words
The transfer medium as in claim 4 in which said support layer comprises a solid polymer with conductive particles dispersed in said polymer and in which said release layer and said support layer are separated by an aluminum layer the thickness of which is about 1000 angstroms.
Claim 7
Dependent Claim
45 words
The transfer medium as in claim 4 or 5 in which said marking material is a blend of about 74 parts by weight ethylene vinyl acetate copolymer, about 15 parts by weight of a compatible acrylic polymer, and about 11 part by weight carbon black.
Claim 8
Dependent Claim
31 words
The transfer medium as in any one of claims 1, 3, 4 or appended to 1, 5 and 6 in which said release layer consists essentially of a linear crystalline polyethylene.
Claim 9
Dependent Claim
25 words
The transfer medium as in any one of claims 1 to 8, in which said support layer comprises a polymeric urethane and a polymeric acrylate.
Claim 10
Dependent Claim
28 words
The transfer medium as in claim 9 in which said polymeric urethane and said polymeric acrylate comprise a blend of an aliphatic polyurethane and a urethane-ethyl acrylate copolymer.
Claim 11
Dependent Claim
37 words
The transfer medium as in claim 10 in which said aliphatic polyurethane and 'said copolymer are in about equal part by weight and said copolymer is about equal part by molecular weight in urethane and ethyl acrylate.
Claim 12
Dependent Claim
20 words
The transfer medium as in any one of claims 5, 10, 11 in which said conductive particles are carbon black.
Claim 13
Dependent Claim
24 words
The transfer medium as in any one of claims 1 to 12 in which the thickness of said support layer is about 17 microns.
References Cited (Backward Citations)
US3301697A
Cited
US4269892A
Cited
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