US4440827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing recording paper for ink jet recording and optical bar code printing
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1983-02-09
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Granted: 1984-04-03
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Expires: 2003-02-09
Abstract
Abstract In producing a recording paper having, on the surface of a support, a coating layer comprising inorganic pigment and aqueous polymeric binder, a recording paper giving a high color density of image, a clear color tone of image and a high resolution and suitable for multi-color recording was obtained by preparing said coating layer by twice or more repeating a step which comprises coating a coating color prepared by mixing 100 parts by weight of said inorganic pigment containing 50-100 parts by weight of synthetic silica with 2-18 parts by weight of said aqueous polymeric binder in an amount of 2-9 g solid/m2 per one side of the support by one run of coating procedure and then drying the coating color.
Inventors
- 👤 Shigehiko Miyamoto
- 👤 Yoshinobu Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:52
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/822; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A process for producing a recording paper for ink jet recording and optical bar code printing having, on the surface of a support, a coating layer comprising an inorganic pigment and an aqueous polymeric binder characterized by obtaining said coating layer by twice or more repeating a coating step with the same coating color which comprises coating a coating color prepared by mixing 100 parts by weight of said inorganic pigment containing 50-100 parts by weight of synthetic silica with 5-18 parts by weight of said aqueous polymeric binder in an amount of 2-9 g solid/m 2 per one side of the support by one run of coating procedure and then drying the coating color.
Claim 2
Dependent Claim
115 words
A process for producing a recording paper for ink jet recording and optical bar code printing having, on the surface of a support, a coating layer comprising an inorganic pigment and an aqueous polymeric binder characterized by obtaining said coating layer by twice or more repeating a coating step with the same coating color which comprises coating a coating color prepared by mixing 100 parts by weight of said inorganic pigment containing 50-100 parts by weight of synthetic silica with 5-18 parts by weight of said aqueous polymeric binder in an amount of 2-9 g solid/m 2 per one side of the support by one run of coating procedure and then drying the coating color.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the content of synthetic silica in 100 parts by weight of inorganic pigment is 65-100 parts by weight.
Claim 4
Dependent Claim
17 words
A process according to claim 1, wherein said aqueous polymeric binder is polyvinyl alcohol or oxidized starch.
Claim 5
Dependent Claim
32 words
A process according to claim 1, wherein the total amount of coating is made 10-25 g solid/m 2 per one side by twice or more repeating the step of coating and drying.
Claim 6
Dependent Claim
41 words
A process according to claim 1, wherein the content of at least one writing property-improver selected from inorganic fine powders having a refractive index of 1.44-1.55 in 100 parts by weight of said inorganic pigment is made 20-50 parts by weight.
Claim 7
Dependent Claim
25 words
A process according to claim 5, wherein said inorganic fine powder is selected from the group consisting of glass powder, powdered silica and colloidal silica.
Claim 8
Dependent Claim
35 words
A process according to claim 1, wherein said coating color contains 15-30 parts by weight of non-film-forming plastic particle having a particle size of 0.02-0.8 micron per 100 parts by weight of said inorganic pigment.
Claim 9
Dependent Claim
15 words
A process according to claim 7, wherein said non-film-forming plastic particle is polystyrene plastic pigment.
Claim 10
Dependent Claim
32 words
A process according to claim 1, wherein, after twice or more repeating the step of coating and drying, the sheet having a coating layer is treated with super calender or gloss calender.
Claim 11
Dependent Claim
11 words
A recording paper obtained by the process defined by claim 1.
Claim 12
Dependent Claim
14 words
A recording paper according to claim 10 which is an ink jet recording paper.
Claim 13
Dependent Claim
15 words
A recording paper according to claim 10 which is an optical bar code printing paper.
Claim 14
Dependent Claim
36 words
A process according to claim 1 wherein the synthetic silica is prepared by (a) thermal decomposition of silicon tetrachloride, (b) formation of a precipitate from sodium silicate and an acidic material, or (c) an aerogel process.
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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |