US4895828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosensitive recording material
Assignee: Ricoh Co Ltd
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Filing: 1989-05-11
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Granted: 1990-01-23
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Expires: 2009-05-11
Abstract
Abstract A thermosensitive recording material is disclosed, which comprises a support, an intermediate layer comprising an expanded plastic filler, formed on the support, and a thermosensitive coloring layer formed on the intermediate layer, in which an electroconductive agent is contained in an effective amount in at least one of the intermediate layer or the thermosensitive coloring layer.
Inventors
- 👤 Hiroshi Yaguchi
- 👤 Hisashi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/423; B41M5/426; B41M5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
45 words
A thermosensitive recording material comprising a support, an intermediate layer comprising an expanded plastic filler, formed on said support, and a thermosensitive coloring layer formed on said intermediate layer, with an electroconductive agent being contained in an effective amount in at least said intermediate layer.
Claim 2
Dependent Claim
45 words
A thermosensitive recording material comprising a support, an intermediate layer comprising an expanded plastic filler, formed on said support, and a thermosensitive coloring layer formed on said intermediate layer, with an electroconductive agent being contained in an effective amount in at least said intermediate layer.
Claim 3
Dependent Claim
21 words
The thermosensitive recording material as claimed in claim 1, wherein said electroconductive agent is also contained in said thermosensitive coloring layer.
Claim 4
Dependent Claim
80 words
The thermosensitive recording material as claimed in claim 1, wherein said intermediate layer comprises a first intermediate layer comprising said expanded plastic filler formed on said support, and a second intermediate layer comprising an organic and/or inorganic filler and a resin capable of forming and emulsion with water and/or a water-based emulsion type resin, formed on said second intermediate layer wherein said electroconductive agent is contained in at least one of said first intermediate layer and said second intermediate layer.
Claim 5
Dependent Claim
21 words
The thermosensitive recording material as claimed in claim 3, wherein said electroconductive agent is also contained in said thermosensitive coloring layer.
Claim 6
Dependent Claim
27 words
The thermosensitive recording material as claimed in claim 3, wherein said electroconductive agent is contained in both of said first intermediate layer and said second intermediate layer.
Claim 7
Dependent Claim
36 words
The thermosensitive recording material as claimed in claim 3, wherein the amount of said electroconductive agent is 10 wt. % or less of the entire solid components contained in each layer which contains said electroconductive agent.
Claim 8
Dependent Claim
28 words
The thermosensitive recording material as claimed in claim 3, wherein said second intermediate layer is subjected to calendering prior to the formation of said thermosensitive coloring layer thereon.
Claim 9
Dependent Claim
36 words
The thermosensitive recording material as claimed in claim 1, wherein the amount of said electroconductive agent is 10 wt. % or less of the entire solid components contained in each layer which contains said electroconductive agent.
Claim 10
Dependent Claim
43 words
The thermosensitive recording material as claimed in claim 1, wherein said electroconductive agent is selected from the group consisting of inorganic salts, organic salts, electroconductive metallic oxides, nonionic antistatic agents, anionic antistatic agents, cationic antistatic agents, amphoteric antistatic agents, and polymeric antistatic agents.
Claim 11
Dependent Claim
46 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is an inorganic salt selected from the group consisting of sodium chloride, potassium chloride, magnesium chloride, ammonium chloride, lithium chloride, aluminum chloride, zinc chloride, potassium bromide, zinc bromide, zinc phosphate, and zinc acetate.
Claim 12
Dependent Claim
28 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is an organic salt selected from the group consisting of potassium formate and sodium oxalate.
Claim 13
Dependent Claim
29 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is an electroconductive metallic oxide selected from the group consisting of zinc oxide and tin oxide.
Claim 14
Dependent Claim
44 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is a nonionic antistatic agent selected from the group consisting of polyoxyethylene alkylamine, polyoxyethylene alkylamide, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, glycerol fatty acid ester, and sorbitan fatty acid ester.
Claim 15
Dependent Claim
37 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is an anionic antistatic agent selected from the group consisting of alkylsulfonate, alkylbenzenesulfonate alkylsulfate, alkyl phosphate, polyacrylic acid salt, polymethacrylate salt, and polystyrene sulfonate.
Claim 16
Dependent Claim
36 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is a cationic antistatic agent selected from the group consisting of quaternary ammonium chloride, quaternary ammonium sulfate, quaternary ammonium nitrate and methylpyridinium salt.
Claim 17
Dependent Claim
31 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is an amphoteric antistatic agent selected from the group consisting of alkyl betaine, alkyl imidazoline and alkyl alanine.
Claim 18
Dependent Claim
34 words
The thermosensitive recording material as claimed in claim 9, wherein said electroconductive agent is a polymeric antistatic agent selected from the group consisting of polyvinyl benzyl cation, polyacrylic acid type cation and polystyrene cation.
Claim 19
Dependent Claim
27 words
The thermosensitive recording material as claimed in claim 1, wherein said intermediate layer is subjected to calendering prior to the formation of said thermosensitive coloring layer thereon.
References Cited (Backward Citations)
US4132436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |