US4603079A
Expired / Lapsed
US
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Overcoated sheet
Assignee: Ricoh Co Ltd
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Filing: 1984-07-30
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Granted: 1986-07-29
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Expires: 2004-07-30
Abstract
Abstract The present invention provides an overcoated sheet which comprises forming, on at least one surface of a substrate, an overcoat layer consisting essentially of styrene/butylmethacrylate/unsaturated organic acid system copolymer, and is used as a transfer sheet for use in a plain-paper copier, a drafting film, a diazo second original film and the like.
Inventors
- 👤 Toshinobu Nishizaki
- 👤 Shuhei Shiraishi
- 👤 Toshiyuki Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:26
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; B; B41; B41M; B41M1/00; B41M1/26; B41M1/30; B41M1/36; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/25; Y10T428/27; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/31587; Y10T428/31678; Y10T428/31681; Y10T428/31688; Y10T428/31692; Y10T428/31696; Y10T428/31699; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
31 words
An overcoated sheet comprising a sheet substrate and an overcoat layer formed on at least one surface of said substrate, which overcoat layer consists essentially of a styrene/butylmethacrylate/unsaturated organic acid-containing copolymer.
Claim 2
Dependent Claim
31 words
An overcoated sheet comprising a sheet substrate and an overcoat layer formed on at least one surface of said substrate, which overcoat layer consists essentially of a styrene/butylmethacrylate/unsaturated organic acid-containing copolymer.
Claim 3
Dependent Claim
23 words
An overcoated sheet according to claim 1 wherein the weight ratio of styrene/butylmethacrylate/unsaturated organic acid in the copolymer is about 1-3/about 1-3/about 1-3.
Claim 4
Dependent Claim
34 words
An overcoated sheet according to claim 1 wherein the unsaturated organic acid component in the copolymer is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, crotonic acid and itaconic acid.
Claim 5
Dependent Claim
18 words
An overcoated sheet according to claim 1 wherein the unsaturated organic acid is acrylic acid or methacrylic acid.
Claim 6
Dependent Claim
31 words
An overcoated sheet according to claim 1 wherein a matted layer consisting essentially of a resinous binder and a matting agent is further provided between the substrate and the overcoat layer.
Claim 7
Dependent Claim
26 words
An overcoated sheet according to claim 1 in which said substrate is selected from the group consisting of paper, plastic films, synthetic paper and metal films.
Claim 8
Dependent Claim
53 words
An overcoated sheet comprising: a plastic film substrate; a matted layer consisting essentially of a resinous binder and a matting agent, said matted layer being formed on at least one surface of said substrate; and an overcoat layer on said matted layer, said overcoat layer consisting essentially of a styrene/butyl-methacrylate/unsaturated organic acid-containing copolymer.
Claim 9
Dependent Claim
53 words
An overcoated sheet comprising: a plastic film substrate; a matted layer consisting essentially of a resinous binder and a matting agent, said matted layer being formed on at least one surface of said substrate; and an overcoat layer on said matted layer, said overcoat layer consisting essentially of a styrene/butyl-methacrylate/unsaturated organic acid-containing copolymer.
Claim 10
Dependent Claim
69 words
An overcoated sheet according to claim 7 wherein the binder is a thermoplastic resin selected from the group consisting of an acrylic resin, a polyester resin, a vinyl chloride resin, a vinyl acetate resin, a vinylidene chloride resin, a styrene resin and copolymers thereof, or a crosslinking-type resin selected from the group consisting of a melamine resin, a urea resin, an epoxy resin, an alkyd resin and mixture thereof.
Claim 11
Dependent Claim
15 words
An overcoated sheet according to claim 8 wherein the binder is a curing-type polyurethane resin.
Claim 12
Dependent Claim
33 words
An overcoated sheet according to claim 9 wherein the unsaturated organic acid in the copolymer is selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, crotonic acid and itaconic acid.
Claim 13
Dependent Claim
18 words
An overcoated sheet according to claim 10 wherein the unsaturated organic acid is acrylic acid or methacrylic acid.
Claim 14
Dependent Claim
21 words
An overcoated sheet according to claim 7 wherein the weight ratio of the matting agent to the binder is about 1/0.5-1/20.
Claim 15
Dependent Claim
126 words
An overcoated sheet comprising a polyester film, a matted layer coating one surface of said film and an overcoat layer coating said matted layer, said matted layer consisting essentially of a mixture of a resinous binder and particles of a matting agent having a particle size in the range of 1 to 10 microns, said overcoat layer consisting essentially of a copolymer of styrene, butyl methacrylate and polymerizable unsaturated organic acid wherein the weight ratio of styrene/butyl methacrylate/unsaturated organic acid in said copolymer is 1-3/1-3/1-3, said unsaturated acid being selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, crotonic acid, itaconic acid and salts thereof, the weight of said overcoat layer per unit area of said film being 5 g/m 2 or less.
Claim 16
Dependent Claim
126 words
An overcoated sheet comprising a polyester film, a matted layer coating one surface of said film and an overcoat layer coating said matted layer, said matted layer consisting essentially of a mixture of a resinous binder and particles of a matting agent having a particle size in the range of 1 to 10 microns, said overcoat layer consisting essentially of a copolymer of styrene, butyl methacrylate and polymerizable unsaturated organic acid wherein the weight ratio of styrene/butyl methacrylate/unsaturated organic acid in said copolymer is 1-3/1-3/1-3, said unsaturated acid being selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, crotonic acid, itaconic acid and salts thereof, the weight of said overcoat layer per unit area of said film being 5 g/m 2 or less.
Claim 17
Dependent Claim
21 words
An overcoated sheet in which said resinous binder comprises a cured polyurethane obtained by reacting a polyol resin with a polyisocyanate.
Claim 18
Dependent Claim
21 words
An overcoated sheet in which said resinous binder comprises a cured polyurethane obtained by reacting a polyol resin with a polyisocyanate.
References Cited (Backward Citations)
US4100329A
Cited
US4202923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |