GB1438973A - Developdr material - Google Patents

Developdr material

Info

Publication number
GB1438973A
GB1438973A GB2511973A GB2511973A GB1438973A GB 1438973 A GB1438973 A GB 1438973A GB 2511973 A GB2511973 A GB 2511973A GB 2511973 A GB2511973 A GB 2511973A GB 1438973 A GB1438973 A GB 1438973A
Authority
GB
United Kingdom
Prior art keywords
fluoro
fluoride
vinylidene fluoride
materials
tetrafluoroethylene
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
Application number
GB2511973A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1438973A publication Critical patent/GB1438973A/en
Expired legal-status Critical Current

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
    • G03G9/1134—Macromolecular components of coatings obtained by reactions only involving carbon-to-carbon unsaturated bonds containing fluorine atoms

Abstract

1438973 Developer carriers XEROX CORP 25 May 1973 [30 May 1972] 25119/73 Heading G2H [Also in Divisions B1-B2] A coated carrier for electrostatographic developer mixtures containing finely-divided toner particles, comprises a substrate comprising a surface having a coating thereon, the coating comprising a fluoro-polymer, which has a critical surface tension of between 10 and 31 dynes per centimetre and which is between 20‹C and 25‹C, a fluorine content between 10 and 85 wt. per cent based on the weight of the fluoro-polymer, a melting point of between 80‹C and 330‹C, a Rockwell hardness in the range between R10 and R105, a compressive strength of between 1,700 p.s.i. and 8,680 p.s.i. Suitable fluoro-polymers are polyvinyl fluoride, polyvinylidene fluoride, polytrifluoro-ethylene, polytrifluorochloroethylene, polytetrafluoroethylene, polyperfluoropropylene, poly (1,1-dihyroperfluorooctylmethacrylate), mixtures of polyvinylidene fluoride and acrylic polymers, copolymers of vinylidene fluoride and acrylic monomers, vinylidenefluoride and trifluoroethylene, styrene and perfluorobutyl methacrylate, styrene and perfluoroethylmethacrylate, tetrafluoroethylene and hexafluoropropylene, vinyl fluoride and vinylidene fluoride, vinylidene fluoride and tetrafluoroethylene, vinylidene fluoride and hexafluoropropylene, fluoroalkyl silanes, fluoro terpolymers such as that of tetrafluoroethylene, vinylidene fluoride and a non-fluorinated monomer and polyfluoroethylene suspended in a matrix such as a polyimide. The fluoro-polymer carrier coating material may be conventionally employed carrier coating materials modified by addition of compatible fluorine-modified resins. Numerous suitable materials are specified. Core materials may be sodium chloride, ammonium chloride, aluminium potassium chloride, Rochelle salt, sodium nitrate, potassium chlorate, granular zircon, granular silicon, methylmethacrylate, glass, silicon dioxide, flintshot, iron, steel, ferrite, nickel, carborundum and mixtures of these. For "touchdown" donor surfaces the carrier material may be cloth, metal backed paper, regenerated cellulose, aluminium foil, polyethylene terephthalate and polyvinyl resins, cellulosic materials and protein materials
GB2511973A 1972-05-30 1973-05-25 Developdr material Expired GB1438973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25760772A 1972-05-30 1972-05-30

Publications (1)

Publication Number Publication Date
GB1438973A true GB1438973A (en) 1976-06-09

Family

ID=22976983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2511973A Expired GB1438973A (en) 1972-05-30 1973-05-25 Developdr material

Country Status (3)

Country Link
JP (1) JPS5340452B2 (en)
GB (1) GB1438973A (en)
NL (1) NL7307621A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011688A1 (en) * 1978-11-13 1980-06-11 International Business Machines Corporation Electrophotographical developer material and its use
DE3438271A1 (en) * 1983-10-19 1985-05-02 Canon K.K., Tokio/Tokyo METHOD OF APPLYING A TONER AND TREATED MAGNETIC PARTICLES FOR USE IN THIS METHOD
US4614700A (en) * 1984-11-15 1986-09-30 Konishiroku Photo Industry Co., Ltd. Image forming process with magnetic brush development
US10952965B2 (en) 2009-05-15 2021-03-23 Baxter International Inc. Compositions and methods for drug delivery

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1080534A (en) * 1976-01-23 1980-07-01 Pitney-Bowes Carrier particle with core of metal, sand or glass and coating of telomer of tetrafluoroethylene
JPS6038703B2 (en) * 1978-02-23 1985-09-02 株式会社リコー Carrier material for electrophotographic development
JPS5840557A (en) * 1981-09-03 1983-03-09 Canon Inc Electrophotographic developer
JPS638651A (en) * 1986-06-30 1988-01-14 Fujitsu Ltd Magnetic brush developer for electrophotography
JPH0210375A (en) * 1988-06-29 1990-01-16 Tomoegawa Paper Co Ltd Positively chargeable yellow developing agent
DE69231367T2 (en) * 1991-02-20 2001-02-01 Fuji Xerox Co Ltd Carriers for the development of electrostatic latent images and processes for their production
JP2625281B2 (en) * 1991-05-14 1997-07-02 富士ゼロックス株式会社 Positively chargeable carrier
JP3973730B2 (en) 1997-05-06 2007-09-12 富士ゼロックス株式会社 Charge imparting member and method for producing the same, electrostatic latent image developer using the same, image forming apparatus, and image forming method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533835A (en) * 1966-10-11 1970-10-13 Xerox Corp Electrostatographic developer mixture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011688A1 (en) * 1978-11-13 1980-06-11 International Business Machines Corporation Electrophotographical developer material and its use
DE3438271A1 (en) * 1983-10-19 1985-05-02 Canon K.K., Tokio/Tokyo METHOD OF APPLYING A TONER AND TREATED MAGNETIC PARTICLES FOR USE IN THIS METHOD
US4614700A (en) * 1984-11-15 1986-09-30 Konishiroku Photo Industry Co., Ltd. Image forming process with magnetic brush development
US10952965B2 (en) 2009-05-15 2021-03-23 Baxter International Inc. Compositions and methods for drug delivery

Also Published As

Publication number Publication date
JPS4951950A (en) 1974-05-20
NL7307621A (en) 1973-12-04
JPS5340452B2 (en) 1978-10-27

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee