US4597993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially pressure-sensitized recording paper and process for preparing the same
Assignee: Kureha Corp
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Filing: 1984-10-15
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Granted: 1986-07-01
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Expires: 2004-10-15
Abstract
Abstract Disclosed herein are a recording paper which is partially pressure-sensitized, comprising microcapsules containing a solution of a colorless color former, sheet material and binder, the microcapsules being fixed to a specified part of a surface of the sheet material via the binder painted on the specified part and majority of the fixed microcapsules having at least a part of the microcapsule exposed to outside of the binder, and a process for producing the recording paper which is partially specified.
Inventors
- 👤 Yoshio Okada
- 👤 Yuriko Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:54
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A process for preparing a recording paper which is partially pressure-sensitized, comprising painting a specified part of a surface of a sheet material with a not-yet hardened binder, adhering microcapsules containing a color former therewithin to the not-yet hardened binder painted on the specified part of the surface of the sheet material and then fixing the microcapsules to the surface of the sheet material using the binder while hardening the not-yet hardened binder painted on the specified part of the surface of the sheet material so as to expose at least a part of a microcapsule to the outside of the space occupied by the binder.
Claim 2
Dependent Claim
106 words
A process for preparing a recording paper which is partially pressure-sensitized, comprising painting a specified part of a surface of a sheet material with a not-yet hardened binder, adhering microcapsules containing a color former therewithin to the not-yet hardened binder painted on the specified part of the surface of the sheet material and then fixing the microcapsules to the surface of the sheet material using the binder while hardening the not-yet hardened binder painted on the specified part of the surface of the sheet material so as to expose at least a part of a microcapsule to the outside of the space occupied by the binder.
Claim 3
Dependent Claim
13 words
The process according to claim 1, wherein the binder is a photosetting resin.
Claim 4
Dependent Claim
27 words
The process according to claim 2, wherein said photosetting resin solidifies when exposed to a strong ultraviolet light having a wavelength in the range of 200-400 nm.
Claim 5
Dependent Claim
68 words
The process according to claim 3, wherein said photosetting resin contains as a major component an acrylic ester comprising a polyol acrylate selected from the group consisting of dimethylolpropane triacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate and dipentaerythritol hexaacrylate; or an epoxyacrylate selected from the group consisting of bisphenol A glycidylether acrylate, modified bisphenol A epoxyacrylate, epoxy diacrylate or acrylates of epoxidized drying oil; and a polyacrylate carbamide.
Claim 6
Dependent Claim
70 words
The process according to claim 4, wherein said photosetting resin further contains as a fluidity-adjusting agent, one or more substances selected from the group consisting of cyclohexyl acrylate, benzyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, styrene, N-methylolacrylamide, vinyl acetate, N-vinylpyrrolidone, ethyleneglycol diacrylate, diethyleneglycol diacrylate, butyleneglycol acrylate and 1,4-butanediol diacrylate; and one or more polymerization assistants selected from the group consisting of methyl o-benzoyl benzoate, thioxanthone, 2-chlorothioxanthone, p-dimethylaminobenzaldehyde, dimethylaminoethane, benzophenone and diethoxyacetophenone.
Claim 7
Dependent Claim
13 words
The process according to claim 1, wherein the microcapsules are dry and powdery.
References Cited (Backward Citations)
US4091122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |