US4245003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated transparent film for laser imaging
Assignee: PGI Graphics Imaging LLC
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Filing: 1979-08-17
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Granted: 1981-01-13
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Expires: 1999-08-17
Abstract
Abstract Disclosed is a laser-imagable material comprising a transparent film having thereon a dried coating comprising graphite particles and binder. Also disclosed is the method of making the laser-imagable material and the method of imaging it.
Inventors
- 👤 Raymond L. Oransky
- 👤 David G. Savage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/46; B41M5/465; B41M5/24; B41M5/382; B41M5/38207; G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/2016; G03F7/202; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10S430/165; Y10T; Y10T428/00; Y10T428/25; Y10T428/30; Y10T428/31504; Y10T428/31786; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
39 words
A laser-imageable member comprising a transparent film having thereon a dried, uniform coating comprising graphite particles and (sufficient) a non-self-oxidizing binder (to form a stable coating.) in sufficient quantity to prevent removal of the coating under normal handling conditions.
Claim 2
Dependent Claim
39 words
A laser-imageable member comprising a transparent film having thereon a dried, uniform coating comprising graphite particles and (sufficient) a non-self-oxidizing binder (to form a stable coating.) in sufficient quantity to prevent removal of the coating under normal handling conditions.
Claim 3
Dependent Claim
21 words
The member according to claim 1, wherein the coating has a light transmission density of from about 1.5 to about 3.5.
Claim 4
Dependent Claim
21 words
The member according to claim 1, wherein the particle size of the graphite is from about 0.5 to about 3.0 microns.
Claim 5
Dependent Claim
18 words
The member according to claim 1 wherein the binder comprises ethyl cellulose. (is provided by a non-self-oxidizing binder.)
Claim 6
Dependent Claim
21 words
The member according to claim 1, wherein the ratio of graphite particles to binder is from about 10:1 to about 1:1.
Claim 7
Dependent Claim
63 words
Method of making a laser-(imagable) imageable member comprising the steps of (a) applying to a transparent film a uniform coating comprising graphite particles and (sufficient) a binder (to form a stable coating) comprising ethyl cellulose in sufficient quantity to prevent removal of the coating under normal handling conditions, said graphite and binder being dispersed in an organic diluent and (b) drying the coating.
Claim 8
Dependent Claim
63 words
Method of making a laser-(imagable) imageable member comprising the steps of (a) applying to a transparent film a uniform coating comprising graphite particles and (sufficient) a binder (to form a stable coating) comprising ethyl cellulose in sufficient quantity to prevent removal of the coating under normal handling conditions, said graphite and binder being dispersed in an organic diluent and (b) drying the coating.
Claim 9
Dependent Claim
11 words
Method according to claim 6, wherein the organic diluent is isopropanol.
Claim 10
Dependent Claim
11 words
Method according to claim 7, wherein the transparent substrate is polystyrene.
Claim 11
Dependent Claim
26 words
Method according to claim 6, wherein the coating is applied to a thickness which provides a light transmission density of from about 1.5 to about 3.5.
Claim 12
Dependent Claim
20 words
Method according to claim 6, wherein the particle size of the graphite is from about 0.5 to about 3.0 microns.
Claim 13
Dependent Claim
20 words
Method according to claim 6, wherein the ratio of graphite particles to binder is from about 10:1 to about 1:1.
Claim 14
Dependent Claim
78 words
Method of making an imaged transparency comprising the steps of: (a) providing a laser-imageable member (which comprises) including a transparent film having thereon a dried uniform coating (comprising) of a liquid dispersion of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling; and (b) directing laser energy in an image pattern to the coating to selectively remove the portion of the coating to which the laser energy is directed.
Claim 15
Dependent Claim
78 words
Method of making an imaged transparency comprising the steps of: (a) providing a laser-imageable member (which comprises) including a transparent film having thereon a dried uniform coating (comprising) of a liquid dispersion of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling; and (b) directing laser energy in an image pattern to the coating to selectively remove the portion of the coating to which the laser energy is directed.
Claim 16
Dependent Claim
15 words
Method according to claim 12, wherein the laser energy is directed through the transparent film.
Claim 17
Dependent Claim
14 words
Method according to claim 12 wherein the binder in the coating is ethyl cellulose.
Claim 18
Dependent Claim
55 words
Method according to claim 12 further including the steps of: placing the coating in intimate contact with a receptor sheet onto which the portion of the coating removed from the film is transferred during laser imaging and applying a vacuum to said receptor sheet to maintain uniform surface contact between said film and receptor sheet.
Claim 19
Dependent Claim
16 words
A laser imageable member in accordance with claim 1 wherein said transparent film is polystyrene film.
Claim 20
Dependent Claim
17 words
A laser imageable member in accordance with claim 1 wherein said transparent film is a polyester film.
Claim 21
Dependent Claim
78 words
Method of producing a printing plate comprising intimately contacting with a lithographic printing surface, the coated surface of a transparent film having a uniform coating of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling conditions, and directing a laser beam image pattern through the transparent film for selectively transferring a portion of the coated surface corresponding to said image pattern from said film to said lithographic printing surface.
Claim 22
Dependent Claim
78 words
Method of producing a printing plate comprising intimately contacting with a lithographic printing surface, the coated surface of a transparent film having a uniform coating of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling conditions, and directing a laser beam image pattern through the transparent film for selectively transferring a portion of the coated surface corresponding to said image pattern from said film to said lithographic printing surface.
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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) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |