US4517273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure fixable capsule toner
Assignee: Canon Inc
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Filing: 1983-12-29
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Granted: 1985-05-14
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Expires: 2003-12-29
Abstract
Abstract A pressure fixable capsule toner is composed of a pressure fixable core material covered with a coating material in which the main particle size of the capsule toner, a (microns), the main particle size of the core material, b (microns), and the hardness of the core material, y (dmm, by JIS-K2530) satisfy the formula: 0.01 exp (a-b)≦y≦5 exp (a-b)
Inventors
- 👤 Sukejiro Inoue
- 👤 Tetsuo Hasegawa
- 👤 Yoshihiro Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/093; G03G9/09307; G03G9/09314; G03G9/09321; G03G9/0935; G03G9/09357; G03G9/09364; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A pressure fixable capsule toner comprising a pressure fixable core material encapsulated with a coating material in which the main particle size of the capsule toner, a in microns, the main particle size of the core material, b in microns, and the hardness of the core material, y in dmm, by Japanese Industrial Standard-K2530 satisfy the formula: 0.01 exp (a-b)≦y≦5 exp (a-b), wherein y is from 0.1-100 dmm and wherein 70% or more of the capsule toner particles are within (∓)3 microns of the main particle size, a.
Claim 2
Dependent Claim
88 words
A pressure fixable capsule toner comprising a pressure fixable core material encapsulated with a coating material in which the main particle size of the capsule toner, a in microns, the main particle size of the core material, b in microns, and the hardness of the core material, y in dmm, by Japanese Industrial Standard-K2530 satisfy the formula: 0.01 exp (a-b)≦y≦5 exp (a-b), wherein y is from 0.1-100 dmm and wherein 70% or more of the capsule toner particles are within (∓)3 microns of the main particle size, a.
Claim 3
Dependent Claim
16 words
A pressure fixable capsule toner according to claim 1 in which the core material contains polyolefin.
Claim 4
Dependent Claim
15 words
A pressure fixable capsule toner according to claim 2 in which the polyolefin is polyethylene.
Claim 5
Dependent Claim
21 words
A pressure fixable capsule toner according to claim 1 in which the coating material is 0.01 micron or more in thickness.
Claim 6
Dependent Claim
19 words
A pressure fixable capsule toner according to claim 1 in which the coating material is a styrene series polymer.
Claim 7
Dependent Claim
61 words
A pressure fixable capsule toner according to claim 1, in which the core material is a member selected from the group consisting of higher fatty acids, polyolefins, low molecular weight polystyrene, epoxy resins, polyester resins, styrene-butadiene copolymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-vinyl acetate copolymers, polyvinylpyrrolidone, methyl vinyl ether maleic anhydride copolymers, maleic acid-modified phenolic resins, and phenol-modified terpene resins.
Claim 8
Dependent Claim
17 words
A pressure fixable capsule toner according to claim 1, in which the coating material is a resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |