US4439485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge recording materials
Assignee: Honshu Seishi KK
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Filing: 1981-10-28
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Granted: 1984-03-27
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Expires: 2001-10-28
Abstract
Abstract A discharge recording material produced by successively forming a colored layer comprising mainly carbonblack and a binder, a deposited metal layer and optionally a protective layer on a support is provided. In particular, the discharge recording material wherein said carbonblack being carbonblack aggregates obtained by pretreating carbonblack particles with a plasticizer is provided.
Inventors
- 👤 Shuji Takemura
- 👤 Yoshihiko Kawano
- 👤 Kazumi Hirakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41M5/245; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24917; Y10T428/24934; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
A discharge recording material which comprises a support, a colored layer on the support, and a metal layer deposited on the colored layer, the colored layer comprising carbonblack aggregates and a binder as main components, the carbonblack aggregates having a mean size within a range of from 0.5 to 5.0μ and being an aggregate of carbonblack particles coated with a plasticizer.
Claim 2
Dependent Claim
61 words
A discharge recording material which comprises a support, a colored layer on the support, and a metal layer deposited on the colored layer, the colored layer comprising carbonblack aggregates and a binder as main components, the carbonblack aggregates having a mean size within a range of from 0.5 to 5.0μ and being an aggregate of carbonblack particles coated with a plasticizer.
Claim 3
Dependent Claim
20 words
A discharge recording material as set forth in claim 1 which further comprises a protective layer on the metal layer.
Claim 4
Dependent Claim
58 words
A discharge recording material as set forth in claim 1 or 2 wherein the plasticizer is a member selected from the group consisting of phthalates, fatty acid esters, maleates, fumerates, trimellitates, glycerol esters, polyester type plasticizers of adipic acid, sebacic acid or phthalic acid, having a molecular weight of about 500 to 8000, or epoxylated ester type plasticizers.
Claim 5
Dependent Claim
112 words
A process for preparing a discharge recording material which comprises the steps of: (i) treating carbonblack powder with a plasticizer and sufficiently adsorbing the plasticizer on the surface of the carbonblack particles to cover the particles and to disperse them in the form of individual particles, then mixing the carbonblack particles thus pretreated with the plasticizer and with a binder and dispersing them to produce a composition for a colored layer, containing carbonblack aggregates having a mean size within a range of from 0.5 to 5.0μ; (ii) applying said composition on a support to form the colored layer; and (iii) depositing a metal onto the colored layer to form a deposited layer.
Claim 6
Dependent Claim
112 words
A process for preparing a discharge recording material which comprises the steps of: (i) treating carbonblack powder with a plasticizer and sufficiently adsorbing the plasticizer on the surface of the carbonblack particles to cover the particles and to disperse them in the form of individual particles, then mixing the carbonblack particles thus pretreated with the plasticizer and with a binder and dispersing them to produce a composition for a colored layer, containing carbonblack aggregates having a mean size within a range of from 0.5 to 5.0μ; (ii) applying said composition on a support to form the colored layer; and (iii) depositing a metal onto the colored layer to form a deposited layer.
Claim 7
Dependent Claim
35 words
A process for preparing a discharge recording material as set forth in claim 4 wherein the amount of the plasticizer used is at least 10 parts by weight per 100 parts by weight of carbonblack.
Claim 8
Dependent Claim
29 words
A process for preparing a discharge recording material as set forth in claim 4 which includes the additional step of forming a protective layer on the deposited metal layer.
Claim 9
Dependent Claim
35 words
A process for preparing a discharge recording material as set forth in claim 6 wherein the amount of the plasticizer used is at least 10 parts by weight per 100 parts by weight of carbonblack.
Claim 10
Dependent Claim
63 words
A process for preparing a discharge recording material as set forth in claim 4, 5 or 7 wherein the plasticizer is a member selected from the group consisting of phthalate, fatty acid esters, maleates, fumarates, trimellitates, glycerol esters, polyester type plasticizers of adipic acids, sebacic acids or phthalic acid, having a molecular weight of about 500 of 8,000 or epoxylated ester type plasticizers.
References Cited (Backward Citations)
US3509088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |