US4219220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording material for use in a pressure sensitive copying system
Assignee: New Oji Paper Co Ltd
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Filing: 1979-05-11
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Granted: 1980-08-26
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Expires: 1999-05-11
Abstract
Abstract A recording material for use in a pressure sensitive copying system has an undercoating layer which is formed on a surface of a base sheet and on which a color former coating layer including microcapsules each encapsulating an oil droplet containing a color former material dissolved or dispersed therein. The undercoating layer comprises finely divided inorganic pigment particles and a binder and is substantially unreactive with the color former material included in the color former layer.
Inventors
- 👤 Shinichi Oda
- 👤 Shoji Aoyagi
- 👤 Takio Kuroda
- 👤 Eishun Tozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/1243; B41M5/165; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/259
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A recording material for use in a pressure sensitive copying system comprising a base sheet, an undercoating layer formed on a surface of said base sheet and a color former coating layer formed on said undercoating layer, said color former layer including microcapsules each encapsulating an oil droplet containing a color former material dissolved or dispersed therein, and said undercoating layer comprising finely divided inorganic pigment particles and a binder said undercoating layer being substantially unreactive with said color former material included in said color former layer, said pigment particles being selected from the group consisting of polyvalent metal carbonates, polyvalent metal oxides, polyvalent metal hydroxides, polyvalent metal silicates and clay minerals.
Claim 2
Dependent Claim
112 words
A recording material for use in a pressure sensitive copying system comprising a base sheet, an undercoating layer formed on a surface of said base sheet and a color former coating layer formed on said undercoating layer, said color former layer including microcapsules each encapsulating an oil droplet containing a color former material dissolved or dispersed therein, and said undercoating layer comprising finely divided inorganic pigment particles and a binder said undercoating layer being substantially unreactive with said color former material included in said color former layer, said pigment particles being selected from the group consisting of polyvalent metal carbonates, polyvalent metal oxides, polyvalent metal hydroxides, polyvalent metal silicates and clay minerals.
Claim 3
Dependent Claim
35 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are clay minerals, said clay minerals being selected from the group consisting of kaolin, talc, zeolite, calcined kaolin and pumice.
Claim 4
Dependent Claim
35 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are pivalent metal carbonates, said polyvalent metal carbonates being selected from the group consisting of calcium carbonate and magnesium carbonate.
Claim 5
Dependent Claim
37 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are pivalent metal oxides, said polyvalent metal oxides being selected from the group consisting of zinc oxide, titanium oxide and magnesium oxide.
Claim 6
Dependent Claim
35 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are polyvalent metal hydroxides, said polyvalent metal hydroxides being selected from the group consisting of aluminum hydroxide and zinc hydroxide.
Claim 7
Dependent Claim
34 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are polyvalent metal silicates, said polyvalent metal silicates selected from the group consisting of magnesium silicates and aluminum silicates.
Claim 8
Dependent Claim
34 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are clay minerals, said clay minerals being physically or chemically deactivated products from attapulgite, acid clay and activated clay.
Claim 9
Dependent Claim
23 words
A recording material according to claim 1 in which said finely divided inorganic pigment particles are substantially unreactive with said color former material.
Claim 10
Dependent Claim
44 words
A recording material according to claim 1, in which said undercoating layer is formed by coating on a surface of said base sheet a coating composition including inorganic pigment particles and binder in an amount of at least 0.1 g/m 2 on dry basis.
Claim 11
Dependent Claim
33 words
A recording material according to claim 9 in which said coating composition is coated on the surface of said base sheet in an amount of 0.2 to 5 g/m 2 on dry basis.
Claim 12
Dependent Claim
40 words
A recording material according to claim 9 in which the amount of said binder included in said coating composition is within the range of 1 to 100 parts by weight per 100 parts by weight of said inorganic pigment particles.
Claim 13
Dependent Claim
40 words
A recording material according to claim 11 in which the amount of said binder included in said coating composition is within the range of 5 to 50 parts by weight per 100 parts by weight of said inorganic pigment particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |