US4588674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser imaging materials comprising carbon black in overlayer
Assignee: MacDermid Autotype Ltd
•
Filing: 1983-10-13
•
Granted: 1986-05-13
•
Expires: 2003-10-13
Abstract
Abstract The laser imaging material comprises a laser-transparent support layer of, for example, polyester. A first overlying layer is laser-transparent and formed from a binder that is instantaneously thermally-chemically-decomposable with the production of a gas, for example, an acrylic or methacrylic homopolymer or copolymer, a cellulosic polymer, or a homopolymer or copolymer of stryene. A second overlying layer is formed from such a material, the same as or different from that of the first overlying layer, pigmented with carbon black. Upon laser irradiation through the support layer 10, selected portions of the carbon black are transferred to a suitable receptor surface such as paper or a lithographic plate.
Inventors
- 👤 Malcolm J. Stewart
- 👤 Andrew Hudson
- 👤 Peter W. Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/392; B41M5/395; G; G03; G03F; G03F1/00; G03F1/68; Y; Y10; Y10S; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A laser imaging material comprising a thermally-stable transparent support, a first overlying layer which is transparent and is instantaneously thermally-chemically-decomposable with the production of a gas and is carried on a surface of the support, and a second overlying layer which comprises a material that is instantaneously thermally-chemically-decomposable with the production of a gas and that is pigmented with carbon black and which extends over and is adhered to the first overlying layer.
Claim 2
Dependent Claim
73 words
A laser imaging material comprising a thermally-stable transparent support, a first overlying layer which is transparent and is instantaneously thermally-chemically-decomposable with the production of a gas and is carried on a surface of the support, and a second overlying layer which comprises a material that is instantaneously thermally-chemically-decomposable with the production of a gas and that is pigmented with carbon black and which extends over and is adhered to the first overlying layer.
Claim 3
Dependent Claim
16 words
A laser imaging material according to claim 1, in which the support is a polyester film.
Claim 4
Dependent Claim
16 words
A laser imaging material according to claim 2, in which the support is biaxially-orientated polyethylene terephthalate.
Claim 5
Dependent Claim
24 words
A laser imaging material according to claim 1, in which at least one of the first and second overlying layers comprises a cellulosic polymer.
Claim 6
Dependent Claim
16 words
A laser imaging material according to claim 4, in which the polymer is nitrocellulose or ethylcellulose.
Claim 7
Dependent Claim
42 words
A laser imaging material according to claim 1, in which at least one of the first and second overlying layers comprises at least one polymeric material selected from acrylic homopolymers and copolymers, methacrylic homopolymers and copolymers, and homopolymers and copolymers of styrene.
Claim 8
Dependent Claim
41 words
A laser imaging material according to claim 1, in which at least one of the first and second overlying layers comprises at least one polymeric material selected from acrylic and methacrylic copolymers containing at least two of styrene, butadiene and acrylonitrile.
Claim 9
Dependent Claim
35 words
A laser imaging material according to claim 1, in which the weight ratio of carbon black to thermally-decomposable material in the second overlying layer is in the range of from about 8:1 to about 1:8.
Claim 10
Dependent Claim
24 words
A laser imaging material according to claim 8, in which the weight ratio is in the range of from about 4:1 to about 1:4.
Claim 11
Dependent Claim
23 words
A laser imaging material according to claim 1, in which the first overlying layer is between about 0.1μ and about 1.0μ in thickness.
Claim 12
Dependent Claim
23 words
A laser imaging material according to claim 1, in which the second overlying layer is between about 0.5μ and about 0.2μ in thickness.
Claim 13
Dependent Claim
32 words
A laser imaging material according to claim 1, in which at least one of the first and second overlying layers comprises at least one polymeric material selected from vinyl homopolymers and copolymers.
Claim 14
Dependent Claim
27 words
A laser imaging material according to claim 6, in which at least one of the first and second overlying layers comprises a copolymer of methylmethacrylate and styrene.
Claim 15
Dependent Claim
53 words
A laser imaging material according to claim 1, in which one of the first and second overlying layers comprises a cellulosic polymer and the other of the first and second layers comprises at least one polymeric material selected from acrylic homopolymers and copolymers, methacrylic homopolymers and copolymers, and homopolymers and copolymers of styrene.
References Cited (Backward Citations)
US2964867A
Cited
GB1316398A
Cited
US3787210A
Cited
US3964389A
Cited
US3962513A
Cited
US4064205A
Cited
US4245003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |