GB1389744A - Electrophotographic developer - Google Patents
Electrophotographic developerInfo
- Publication number
- GB1389744A GB1389744A GB2730272A GB2730272A GB1389744A GB 1389744 A GB1389744 A GB 1389744A GB 2730272 A GB2730272 A GB 2730272A GB 2730272 A GB2730272 A GB 2730272A GB 1389744 A GB1389744 A GB 1389744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- core material
- electrophotographic developer
- june
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/10—Developers with toner particles characterised by carrier particles
- G03G9/113—Developers with toner particles characterised by carrier particles having coatings applied thereto
- G03G9/1132—Macromolecular components of coatings
- G03G9/1133—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
1389744 Coated particles for electrophotographic developer INTERNATIONAL BUSINESS MACHINES CORP 12 June 1972 [23 June 1971] 27302/72 Heading B2E An electrophotographic developer includes carrier particles and toner particles, the carrier particles each having an interior core portion and a surface layer which comprises at least a major portion of carboxylated polyethylene ionomer. The core may be of sand, glass, metal e.g. iron or steel, magnetic oxides and alloys, e.g. copper-nickel-iron. The coating may be applied to the particulate core material by dipping, spraying, tumbling the core material with a coating solution in a barrel, or by using a fluidised bed. The core material may be pre-treated with a primer, e.g. polyvinyl butyral resin, vinyl chloride terpolymer, polymethyl methacrylate. Other pre-treatments include cleaning, pickling and etching. Pigments and other polymers may be added to the ionomer coating to modify the triboelectric behaviour of the coating.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15606071A | 1971-06-23 | 1971-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1389744A true GB1389744A (en) | 1975-04-09 |
Family
ID=22557934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2730272A Expired GB1389744A (en) | 1971-06-23 | 1972-06-12 | Electrophotographic developer |
Country Status (11)
Country | Link |
---|---|
US (1) | US3725118A (en) |
JP (1) | JPS5037546B1 (en) |
AR (1) | AR207312A1 (en) |
BE (1) | BE784671A (en) |
BR (1) | BR7204133D0 (en) |
CA (1) | CA1082025A (en) |
CH (1) | CH561919A5 (en) |
FR (1) | FR2143691B1 (en) |
GB (1) | GB1389744A (en) |
IT (1) | IT950713B (en) |
NL (1) | NL169375C (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3873356A (en) * | 1971-01-28 | 1975-03-25 | Ibm | Method of manufacturing electrophotographic carriers |
US3873355A (en) * | 1971-01-28 | 1975-03-25 | Ibm | Coated carrier particles |
US3898170A (en) * | 1972-03-21 | 1975-08-05 | Eastman Kodak Co | Electrographic carrier vehicle and developer composition |
US4055684A (en) * | 1974-12-02 | 1977-10-25 | Addressograph Multigraph Corporation | Coated carrier particles for use in electrophotographic process |
US3970571A (en) * | 1974-12-20 | 1976-07-20 | Eastman Kodak Company | Method for producing improved electrographic developer |
US4287287A (en) * | 1980-01-28 | 1981-09-01 | Xerox Corporation | Electrostatographic carrier coated with thixotropic compositions |
JPS5840557A (en) * | 1981-09-03 | 1983-03-09 | Canon Inc | Electrophotographic developer |
JPH0820764B2 (en) * | 1987-01-16 | 1996-03-04 | 東洋インキ製造株式会社 | Electrophotographic toner |
WO1993004408A1 (en) * | 1991-08-16 | 1993-03-04 | Eastman Kodak Company | Ferrite green beads and method of producing carrier particles |
-
1971
- 1971-06-23 US US00156060A patent/US3725118A/en not_active Expired - Lifetime
-
1972
- 1972-01-01 AR AR242617A patent/AR207312A1/en active
- 1972-03-24 IT IT22325/72A patent/IT950713B/en active
- 1972-05-30 NL NLAANVRAGE7207277,A patent/NL169375C/en not_active IP Right Cessation
- 1972-06-01 FR FR7220522A patent/FR2143691B1/fr not_active Expired
- 1972-06-06 JP JP47055698A patent/JPS5037546B1/ja active Pending
- 1972-06-09 BE BE784671A patent/BE784671A/en not_active IP Right Cessation
- 1972-06-12 GB GB2730272A patent/GB1389744A/en not_active Expired
- 1972-06-14 CH CH887972A patent/CH561919A5/xx not_active IP Right Cessation
- 1972-06-20 CA CA145,129A patent/CA1082025A/en not_active Expired
- 1972-06-23 BR BR4133/72A patent/BR7204133D0/en unknown
Also Published As
Publication number | Publication date |
---|---|
AR207312A1 (en) | 1976-09-30 |
BE784671A (en) | 1972-10-02 |
NL7207277A (en) | 1972-12-28 |
JPS5037546B1 (en) | 1975-12-03 |
DE2226478B2 (en) | 1975-07-10 |
US3725118A (en) | 1973-04-03 |
BR7204133D0 (en) | 1973-05-31 |
CH561919A5 (en) | 1975-05-15 |
DE2226478A1 (en) | 1972-12-28 |
CA1082025A (en) | 1980-07-22 |
NL169375C (en) | 1982-07-01 |
FR2143691A1 (en) | 1973-02-09 |
FR2143691B1 (en) | 1975-03-28 |
NL169375B (en) | 1982-02-01 |
IT950713B (en) | 1973-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |