Patent US3900216A successfully refreshed from Google Patents.
US3900216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing clay coated paper for pressure sensitive copying paper
Assignee: Fujifilm Holdings Corp
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Filing: 1973-02-02
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Granted: 1975-08-19
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Expires: 1993-02-02
Abstract
Abstract A method for preparing a clay-coated paper for pressuresensitive copying which comprises, applying to a paper support having a layer of microcapsules containing at least one color former, a slurry comprising an alkali dispersing agent an anionic high molecular weight electrolyte, an electron-acceptive adsorbent clay, and a binder, and product so obtained.
Inventors
- 👤 Takao Hayashi
- 👤 Hiroharu Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:22
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; B41M5/1555
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
138 words
A METHOD FOR PREPARING A CLAY-COATED PAPER FOR PRESSURESENSITIVE COPYING WHICH COMPRISES APPLYING TO A PAPER SUPPORT A SLURRY COMPRISING AN ALKALI DISPERSING AGENT, AN ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE,AN ELECTRON-ACCEPTIVE ADSORVBENT CLAY, AND A BINDER, SAID CLAY BEING REACTIVE WITH A COLOR-FORMER TO FORM A DISTINCT COLOR, THE CONCENTRATION OF SAID ELECTROLYTE BEING IN THE RANGE OF FROM 0.2 TO 5.0% BY WEIGT, BASE ON THE CLAY, AND, SAID ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF AN ALKYLI METAL SALT OF POLACRYLATE, ALGINATE, A STYRENE-MALECICANYDRIDE COPOLYMER, POLACRYLATE, POLYASPARAGINATE, METHYLVINYLETHER-MALEIC ANHYDRIDE COPOLYMER A BUTADIENE-METHACRYLATE COPOLYMER, A POLETHENE-MALECI ANHYDRIDE ANHYDRIDE COPOLYMER, A POLYVINLBENZENZENE SULFONATE, CARBOXYMETHYL CELLUOSE, CARBOXETYL CELLOSE, GUM ARABIC, PENCTIN ACID, CARBOXYMETHYL STARCH, STARCH SULFATE, STARCH PHOSPHATE, THE CARBOXYMETHYL-ETHER OF HYDROXYL CELLOSE, AND THE SULFATE ESTER OR PHOSPHATE ESTER OF A HYDROXYETHYL CELLOSE.
Claim 2
Independent Claim
138 words
A METHOD FOR PREPARING A CLAY-COATED PAPER FOR PRESSURESENSITIVE COPYING WHICH COMPRISES APPLYING TO A PAPER SUPPORT A SLURRY COMPRISING AN ALKALI DISPERSING AGENT, AN ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE,AN ELECTRON-ACCEPTIVE ADSORVBENT CLAY, AND A BINDER, SAID CLAY BEING REACTIVE WITH A COLOR-FORMER TO FORM A DISTINCT COLOR, THE CONCENTRATION OF SAID ELECTROLYTE BEING IN THE RANGE OF FROM 0.2 TO 5.0% BY WEIGT, BASE ON THE CLAY, AND, SAID ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF AN ALKYLI METAL SALT OF POLACRYLATE, ALGINATE, A STYRENE-MALECICANYDRIDE COPOLYMER, POLACRYLATE, POLYASPARAGINATE, METHYLVINYLETHER-MALEIC ANHYDRIDE COPOLYMER A BUTADIENE-METHACRYLATE COPOLYMER, A POLETHENE-MALECI ANHYDRIDE ANHYDRIDE COPOLYMER, A POLYVINLBENZENZENE SULFONATE, CARBOXYMETHYL CELLUOSE, CARBOXETYL CELLOSE, GUM ARABIC, PENCTIN ACID, CARBOXYMETHYL STARCH, STARCH SULFATE, STARCH PHOSPHATE, THE CARBOXYMETHYL-ETHER OF HYDROXYL CELLOSE, AND THE SULFATE ESTER OR PHOSPHATE ESTER OF A HYDROXYETHYL CELLOSE.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said electrolyte is a sodium or potassium salt.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the concentration of said electrolyte ranges from 0.5 to 5.0% by weight, based on the clay.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein the concentration of said binder is 10.0-20.0% by weight, based upon the clay.
Claim 6
Dependent Claim
126 words
A PRESSURE-SENSTIVE COPYING PAPER COMPRISING ASUPPORT PAPER HAVING COATED THEREON A LAYER COMPRISING AN ALKLU DISPERSING AGENT, A CLAY, A BINDER, AND AN ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE, SAID CLAY BEING REACTIVE WIT ACOLORFORMER TO FORM A DISTINCT COLOR, SAID ELECTROLYTE BEING PRESENT IN A RANGE OF FROM 0.2 TO 5.0% BY WEIGHT, BASED ON THE CLAY, AND SAID ANIONIC MOLECULAR WEIGHT ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL SALT OF POLYACRYLATE, ALGINATE, A STYRENE-MALEICANYDRIDE COPOLYMER, POLYGLUTAMATE, POLYASPARAGINATE, POLYMETHACRYLATE, METHYLVINYLETHER-MALECANHYDRIDE COPOLYMERS, A BUTADINE-METHA CRYLATE COPOLYMER, A POLYETHYLENE-MALEIC ANHYDRIC COPOLYMER, A POLYVINY-BENZENE SULFONATE, CARBOXYMETHYL CELLOSE, CARBOXYETHYL CELLOSE, GUM ARABIC, PENTIN ACID, CARBOXYMETHYL STARCH, STARCH SULFATE, STARCH PHOSPHATE, THE CARBOXYTHYL-ETHER OF HYDROXYETHYL CELLOSE, AND THE SULFATE ESTER OR PHOSPHATE ESTER OF A HYDROXYETHYL CELLOSE.
Claim 7
Dependent Claim
126 words
A PRESSURE-SENSTIVE COPYING PAPER COMPRISING ASUPPORT PAPER HAVING COATED THEREON A LAYER COMPRISING AN ALKLU DISPERSING AGENT, A CLAY, A BINDER, AND AN ANIONIC HIGH MOLECULAR WEIGHT ELECTROLYTE, SAID CLAY BEING REACTIVE WIT ACOLORFORMER TO FORM A DISTINCT COLOR, SAID ELECTROLYTE BEING PRESENT IN A RANGE OF FROM 0.2 TO 5.0% BY WEIGHT, BASED ON THE CLAY, AND SAID ANIONIC MOLECULAR WEIGHT ELECTROLYTE BEING SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL SALT OF POLYACRYLATE, ALGINATE, A STYRENE-MALEICANYDRIDE COPOLYMER, POLYGLUTAMATE, POLYASPARAGINATE, POLYMETHACRYLATE, METHYLVINYLETHER-MALECANHYDRIDE COPOLYMERS, A BUTADINE-METHA CRYLATE COPOLYMER, A POLYETHYLENE-MALEIC ANHYDRIC COPOLYMER, A POLYVINY-BENZENE SULFONATE, CARBOXYMETHYL CELLOSE, CARBOXYETHYL CELLOSE, GUM ARABIC, PENTIN ACID, CARBOXYMETHYL STARCH, STARCH SULFATE, STARCH PHOSPHATE, THE CARBOXYTHYL-ETHER OF HYDROXYETHYL CELLOSE, AND THE SULFATE ESTER OR PHOSPHATE ESTER OF A HYDROXYETHYL CELLOSE.
Claim 8
Dependent Claim
16 words
The pressure-sensitive copying paper of claim 5 wherein said electrolyte is a sodium or potassium salt.
Claim 9
Dependent Claim
24 words
The pressure-sensitive copying paper of claim 5 wherein the concentration of said electrolyte ranges from 0.5 to 5.0% by weight, based on the clay.
Claim 10
Dependent Claim
17 words
The pressure-sensitive copying paper of claim 5 wherein the amount of binder employed is 10.0-20.0% by weight.
Claim 11
Dependent Claim
21 words
The pressure-sensitive copying paper of claim 5 wherein a layer of microcapsules containing a color-former is present on the clay-coated paper.
Claim 12
Dependent Claim
112 words
The pressure-sensitive copying paper assembly wherein said paper comprises a capsule coated paper containing at least one color-former and a clay-coated paper containing a binder and an anionic high molecular weight electrolyte, said clay contacted with said color former to form a distinct color, wherein said electrolyte is a member selected from the group consisting of a sodium or potassium salt of polyacrylate, alginate, carboxymethyl cellulose, carboxyethyl cellulose, gum arabic, a styrene-maleicanhydride copolymer, polyglutamate, polyasparaginate, polymethacrylate, methylvinylether-maleicanhydride copolymers, a butadiene-methacrylate copolymer, a polyethylene-maleic anhydride copolymer, pectin, pectinic acid, carboxymethyl starch, starch sulfate, starch phosphate, polyvinylbenzene sulfonate, the carboxymethyl-ether of hydroxyethyl cellulose, and the sulfate ester or phosphate ester of a hydroxyethyl cellulose.
Claim 13
Dependent Claim
112 words
The pressure-sensitive copying paper assembly wherein said paper comprises a capsule coated paper containing at least one color-former and a clay-coated paper containing a binder and an anionic high molecular weight electrolyte, said clay contacted with said color former to form a distinct color, wherein said electrolyte is a member selected from the group consisting of a sodium or potassium salt of polyacrylate, alginate, carboxymethyl cellulose, carboxyethyl cellulose, gum arabic, a styrene-maleicanhydride copolymer, polyglutamate, polyasparaginate, polymethacrylate, methylvinylether-maleicanhydride copolymers, a butadiene-methacrylate copolymer, a polyethylene-maleic anhydride copolymer, pectin, pectinic acid, carboxymethyl starch, starch sulfate, starch phosphate, polyvinylbenzene sulfonate, the carboxymethyl-ether of hydroxyethyl cellulose, and the sulfate ester or phosphate ester of a hydroxyethyl cellulose.
Claim 14
Dependent Claim
24 words
The pressure-sensitive copying paper assembly of claim 10 wherein the concentration of said electrolyte ranges from 0.2 to 5.0%, by weight, of the clay.
Claim 15
Dependent Claim
24 words
The pressure-sensitive copying paper assembly of claim 10 wherein the concentration of said electrolyte ranges from 0.5 to 5.0%, by weight, of the clay.
Claim 16
Dependent Claim
22 words
The pressure-sensitive coPying paper assembly of claim 10 wherein the concentration of binder employed is 10.0-20.0% by weight, based upon the clay.
References Cited (Backward Citations)
US3293060A
Cited
US3226252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |