US4082902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark-recording type printing method and spark-recording material for use thereof
Assignee: Ricoh Co Ltd
•
Filing: 1974-09-10
•
Granted: 1978-04-04
•
Expires: 1994-09-10
Abstract
Abstract The present invention provides a spark-recording type printing method and a spark-recording material for use in the method, which printing method comprises the processes of: forming an image on a spark-recording material by the spark-recording method, said spark-recording material comprising a support and a layer of metal deposited thereon by vacuum evaporation, and, if necessary, being provided with a colored layer interposed between said support and metal layer, and if further necessary, being provided with a protective layer which is easy to desensitize and/or a desensitized layer which requires no desensitization treatment as formed on said metal layer; and conducting offset printing by employing said spark-recording material having an image formed thereon as a master either after subjecting it to desensitization treatment when it is not provided with said desensitized layer or directly when it is provided with said desensitized layer.
Inventors
- 👤 Akira Suzuki
- 👤 Keiji Kubo
- 👤 Suguru Kunitake
- 👤 Fumiaki Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:57
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1033; B41M; B41M1/00; B41M1/06; B41M1/08; B41N; B41N3/00; B41N3/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A spark-recording material for use in offset printing, which comprises a support, a colored layer based on oleophilic resin and colorant, a layer of metal deposited by vacuum evaporation, a protective layer based on either (a) hydrophilic polymer or (b) polymer and acid-soluble polyvalent metal compond, and a desensitized layer based on desensitizing substance.
Claim 2
Dependent Claim
54 words
A spark-recording material for use in offset printing, which comprises a support, a colored layer based on oleophilic resin and colorant, a layer of metal deposited by vacuum evaporation, a protective layer based on either (a) hydrophilic polymer or (b) polymer and acid-soluble polyvalent metal compond, and a desensitized layer based on desensitizing substance.
Claim 3
Dependent Claim
44 words
A spark-recording material according to claim 1, wherein said desensitizing substance is either (a) at least one member of the group of oil-repellent substances consisting of silicone elastomers, silicone varnishes, silicone oils and carbon fluoride compounds or (b) selected from the group of phosphates.
Claim 4
Dependent Claim
62 words
A spark-recording material according to claim 1, wherein said hydrophilic polymer is selected from the group consisting of gum arabic, polyvinyl alcohol, casein, gelatin, starch derivatives, carboxymethyl cellulose and Na salt thereof, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cellulose acetate, sodium alginate, vinyl acetate˜maleic acid copolymers, styrene˜maleic acid copolymers, polyacrylic acids and Na salts thereof, and polymethacrylic acids and Na salt thereof.
Claim 5
Dependent Claim
26 words
A spark-recording material according to claim 3, wherein said hydrophilic polymer is selected from the group consisting of gum arabic and Na salt of carboxymethyl cellulose.
Claim 6
Dependent Claim
17 words
A spark-recording material according to claim 4 wherein said hydrophilic polymer is Na salt of carboxymethyl cellulose.
Claim 7
Dependent Claim
121 words
A spark-recording material according to claim 1, wherein said hydrophilic polymer is selected from the group consisting of gum arabic, polyvinyl alcohol, casein, gelatin, starch derivatives, carboxymethyl cellulose and Na salt thereof, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cellulose acetate, sodium alginate, vinyl acetate˜maleic acid copolymers, styrene˜maleic acid copolymers, polyacrylic acids and Na salts thereof, polymethacrylic acids and Na salts thereof, polyethylene, polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic ester, polymethacrylic ester, polyester, polyvinyl formal, polyvinyl butyral, polyamide and copolymers thereof, and said polyvalent metal compound is selected from the group consisting of the oxides, sulfides, hydroxides, halogenides, carbonates, phosphates, sulfates, nitrates and organic acid salts of metals belonging to Groups II - VIII of the Table of Periodic Law.
Claim 8
Dependent Claim
26 words
A spark-recording material according to claim 1, wherein the ratio by weight of said polymer to said polyvalent metal compound is from about 1:5 to 3:1.
Claim 9
Dependent Claim
12 words
A spark-recording material according to claim 6, wherein said polymer is oleophilic.
Claim 10
Dependent Claim
12 words
A spark-recording material according to claim 6, wherein said polymer is hydrophilic.
Claim 11
Dependent Claim
14 words
A spark-recording material according to claim 6, wherein said polymer is hydrophilic and oleophilic.
Claim 12
Dependent Claim
16 words
A spark-recording material according to claim 6, wherein said polyvalent metal compound is a white pigment.
Claim 13
Dependent Claim
22 words
A spark-recording material according to claim 1, wherein the ratio by weight of said oleophilic resin to said colorant is about 10:1.
Claim 14
Dependent Claim
40 words
A spark-recording material according to claim 1, wherein said oleophilic resin is selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic ester, polymethacrylic ester, polyester, polyvinyl formal, polyvinyl butyral, polyamide and copolymers thereof.
Claim 15
Dependent Claim
75 words
A spark-recording material for use in offset printing comprising a first support layer of paper and the following layers in successive superimposed relationship: a. A colored layer which is a vinyl chloride-vinyl acetate copolymer containing carbon black, b. A metallic layer of aluminum which has been deposited by vacuum evaporation, c. A protective layer which is polyacrylic acid polymer containing zinc oxide, and d. A top desensitized layer of ammonium dihydrogen phosphate and gum arabic.
Claim 16
Dependent Claim
75 words
A spark-recording material for use in offset printing comprising a first support layer of paper and the following layers in successive superimposed relationship: a. A colored layer which is a vinyl chloride-vinyl acetate copolymer containing carbon black, b. A metallic layer of aluminum which has been deposited by vacuum evaporation, c. A protective layer which is polyacrylic acid polymer containing zinc oxide, and d. A top desensitized layer of ammonium dihydrogen phosphate and gum arabic.
References Cited (Backward Citations)
US1245120A
Cited
US2713822A
Cited
US3113512A
Cited
US2826511A
Cited
US2983220A
Cited
US2951441A
Cited
US3151549A
Cited
US3113511A
Cited
US3376162A
Cited
US3861952A
Cited
DE2256580A1
Cited
US3875023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |