US4682191A
Expired / Lapsed
US
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Heat-sensitive recording paper
Assignee: Fujifilm Holdings Corp
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Filing: 1986-02-05
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Granted: 1987-07-21
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Expires: 2006-02-05
Abstract
Abstract A heat-sensitive recording paper is described, comprising a paper support having thereon a heat-sensitive color forming layer, wherein said paper support contains at least 10% by weight of a pigment and has an internal bonding strength as defined by Tappi-RC-308 of from 0.5 to 2.5 kg.cm.
Inventors
- 👤 Shigehisa Tamagawa
- 👤 Tetsuro Fuchizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/41; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
44 words
A heat-sensitive recording paper comprising a paper support having thereon a heat-sensitive color forming layer, wherein said paper support contains at least 10% by weight of a pigment and has an internal bonding strength as defined by Tappi-RC-308 of from 0.5 to 2.5 kg.cm.
Claim 2
Dependent Claim
44 words
A heat-sensitive recording paper comprising a paper support having thereon a heat-sensitive color forming layer, wherein said paper support contains at least 10% by weight of a pigment and has an internal bonding strength as defined by Tappi-RC-308 of from 0.5 to 2.5 kg.cm.
Claim 3
Dependent Claim
22 words
A heat-sensitive recording paper as in claim 1, wherein the paper support has a density of at least 0.80 g/cm 3 .
Claim 4
Dependent Claim
21 words
A heat-sensitive recording paper as in claim 1, wherein the pigment is a white inorganic pigment or a white organic pigment.
Claim 5
Dependent Claim
60 words
A heat-sensitive recording paper as in claim 3, wherein the pigment is a white inorganic pigment selected from the group consisting of talc, clay, kaolin, baked kaolin, natural silica, synthetic silica, barium sulfate, and titanium oxide, or a white organic pigment selected from the goup consisting of a ureaformaldehyde resin, a polystyrene resin, a polyethylene resin, and an acrylic resin.
Claim 6
Dependent Claim
22 words
A heat-sensitive recording paper as in claim 1, wherein the pigment has an average particle size of from 0.1 to 10 μm.
Claim 7
Dependent Claim
21 words
A heat-sensitive recording paper as in claim 1, wherein the paper support has a density of 0.83 g/cm 3 or more.
Claim 8
Dependent Claim
23 words
A heat-sensitive recording paper as in claim 1, wherein the internal bonding strength as defined by Tappi-RC-308 is from 1.0 to 2.0 kg.cm.
Claim 9
Dependent Claim
22 words
A heat-sensitive recording paper as in claim 7, wherein the paper support has a density of at least 0.80 g/cm 3 .
Claim 10
Dependent Claim
21 words
A heat-sensitive recording paper as in claim 7, wherein the pigment is a white inorganic pigment or a white organic pigment.
Claim 11
Dependent Claim
60 words
A heat-sensitive recording paper as in claim 9, wherein the pigment is a white inorganic pigment selected from the group consisting of talc, clay, kaolin, baked kaolin, natural silica, synthetic silica, barium sulfate, and titanium oxide, or a white organic pigment selected from the group consisting of a urea-formaldehyde resin, a polystyrene resin, a polyethylene resin, and an acrylic resin.
Claim 12
Dependent Claim
22 words
A heat-sensitive recording paper as in claim 7, wherein the pigment has an average particle size of from 0.1 to 10 μm.
Claim 13
Dependent Claim
21 words
A heat-sensitive recording paper as in claim 7, wherein the paper support has a density of 0.83 g/cm 3 or more.
Claim 14
Dependent Claim
28 words
A heat-sensitive recording paper as in claim 1, wherein the paper support is formed from pulp which as a Canadian Standard Freeness of from 200 to 500 C.C.
Claim 15
Dependent Claim
28 words
A heat-sensitive recording paper as in claim 1, wherein the paper support is formed from pulp which has a Canadian Standard Freeness of from 300 to 400 C.C.
References Cited (Backward Citations)
JPS5651385A
Cited
US4333984A
Cited
JPS56115292A
Cited
JPS572794A
Cited
JPS5791296A
Cited
JPS5869091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |