US4421839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive and photofixing recording sheet with diazosulfonate and acidic coupling agent therefore
Assignee: Toshiba Corp
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Filing: 1982-03-03
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Granted: 1983-12-20
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Expires: 2002-03-03
Abstract
Abstract A heat-sensitive recording sheet is proposed which has a heat-sensitive recording layer laminated on one surface of a support body and containing a diasosulfonate; a acid coupling agent comprising a compound having aromatic ring, hetroaromatic ring or substituted aromatic ring bonded thereto OH group and COOH group; and a thermoplastic resin having a glass transition point of 70°-150° C. or a photocuring resin.
Inventors
- 👤 Ryohei Takiguchi
- 👤 Masayoshi Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/56; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A heat-sensitive recording sheet adapted for use in a recording process consisting in sequence of optical activation with a wavelength of more than 400 nm, heat-sensitive recording with a thermal energy of 0.4-10 w/1-3 msec per dot (260μ×130μ) and photofixing at a wavelength of 300-450 nm, wherein on at least one major surface of a sheet-like support body is formed a heat-sensitive recording layer consisting of: a diazosulfonate; an acidic coupling agent comprising an aromatic compound in which one or more --OH groups and one --COOH group are bonded to an aromatic ring; and a member selected from the group consisting of thermosetting or thermoplastic resins having a glass transition point of 70°-150° C.
Claim 2
Dependent Claim
114 words
A heat-sensitive recording sheet adapted for use in a recording process consisting in sequence of optical activation with a wavelength of more than 400 nm, heat-sensitive recording with a thermal energy of 0.4-10 w/1-3 msec per dot (260μ×130μ) and photofixing at a wavelength of 300-450 nm, wherein on at least one major surface of a sheet-like support body is formed a heat-sensitive recording layer consisting of: a diazosulfonate; an acidic coupling agent comprising an aromatic compound in which one or more --OH groups and one --COOH group are bonded to an aromatic ring; and a member selected from the group consisting of thermosetting or thermoplastic resins having a glass transition point of 70°-150° C.
Claim 3
Dependent Claim
20 words
A heat-sensitive recording sheet according to claim 1, wherein the aromatic ring is a benzene ring or a naphthalene ring.
Claim 4
Dependent Claim
22 words
A heat-sensitive recording sheet according to claim 1, wherein said sheet-like support body is made of a plastic or a paper sheet.
Claim 5
Dependent Claim
32 words
A heat-sensitive recording sheet according to claim 1, wherein said sheet-like support body has a magnetic recording layer on the surface opposite the surface on which the heat-sensitive recording layer is formed.
Claim 6
Dependent Claim
18 words
A heat-sensitive recording sheet according to claim 1, wherein said heat-sensitive recording layer further consists of a lubricant.
Claim 7
Dependent Claim
24 words
A heat-sensitive recording sheet according to claim 1, 2, 3, 4 or 5, wherein said sheet-like support body is for preparing a transportation ticket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |