GB944394A - Developer for electrophotographic purposes - Google Patents

Developer for electrophotographic purposes

Info

Publication number
GB944394A
GB944394A GB27695/60A GB2769560A GB944394A GB 944394 A GB944394 A GB 944394A GB 27695/60 A GB27695/60 A GB 27695/60A GB 2769560 A GB2769560 A GB 2769560A GB 944394 A GB944394 A GB 944394A
Authority
GB
United Kingdom
Prior art keywords
toner
resins
toners
carrier
positive
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
GB27695/60A
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.)
Kalle GmbH and Co KG
Original Assignee
Kalle GmbH and Co KG
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 Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
Publication of GB944394A publication Critical patent/GB944394A/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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G03G13/08—Developing using a solid developer, e.g. powder developer
    • 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
    • G03G9/103—Glass particles

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

944,394. Electrophotographic developers. KALLE A. G. Aug. 10, 1960 [Aug. 17,1959], No. 27695/60. Heading G2H. An electrophotographic developer comprises a mixture of a finely divided carrier and two distinguishable toners, one of which has a positive charge and the other of which has a negative charge relative to the carrier. The carrier may be of glass quartz, metal, potassium or copper sulphate, potassium or sodium chloride, polystyrene, carboxymethyl cellulose, or glass balls covered with an organic resin or crystals of oxalic acid, adipic acid or phthalic anhydride, the carrier particles being between 100 and 600 Á. For carriers of glass or iron, the positive toner may be one or more of the following: colophony, copal resins, dammar resin, asphalt, colophonymodified phenol resins, ketone resins, maleic resins, coumarone resins, polyacrylic acid resins, and polystyrenes; and may contain inorganic or organic pigments or dyestuffs. The positive toner may include animal, vegetable, or synthetic waxes and/or a low-melting point organic compound such as α- or #-naphthol, acenaphthene, acetanilide, #-dibromobenzene, 2:4-diaminotoluene o-phenylenediamine, resorcinol, or diphenylamine or derivatives thereof. In Example 5 a photoconductive oxadiazole is also included in the positive toner. The negative toner may be a metal resinate, a vinyl chloride copolymer containing carboxyl groups as in Specification 944, 393, or a combination of these with at least half as the resinate, and the negative toners may also include wax and low melting organic compounds and dyestuffs and pigments as described for the positive toners. The toner particle zones should be within the range 1 to 100 Á, and should comprise by weight 0.1 to 10% of the weight of the carrier. The ratio between the toners may be between 1 : 1 and 10 : 1. Mixtures of toners of the same charge may be used and in an example the positive toner is red and the negative toner is a mixture of green and blue particles.
GB27695/60A 1959-08-17 1960-08-10 Developer for electrophotographic purposes Expired GB944394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK38460A DE1206306B (en) 1959-08-17 1959-08-17 Developer for electrophotographic purposes

Publications (1)

Publication Number Publication Date
GB944394A true GB944394A (en) 1963-12-11

Family

ID=7221388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27695/60A Expired GB944394A (en) 1959-08-17 1960-08-10 Developer for electrophotographic purposes

Country Status (8)

Country Link
US (1) US3236776A (en)
BE (1) BE594137A (en)
CH (1) CH381983A (en)
DE (1) DE1206306B (en)
GB (1) GB944394A (en)
LU (1) LU39008A1 (en)
NL (1) NL254973A (en)
SE (1) SE306667B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542681A (en) * 1968-07-10 1970-11-24 Gaf Corp Negative working electrostatic toners
US4302201A (en) * 1976-06-02 1981-11-24 Canon Kabushiki Kaisha Method for developing electrical latent images

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417019A (en) * 1962-12-27 1968-12-17 Eastman Kodak Co Xerographic development
US3965021A (en) * 1966-01-14 1976-06-22 Xerox Corporation Electrostatographic toners using block copolymers
US4018601A (en) * 1969-06-19 1977-04-19 Xerox Corporation Electrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickel
US3725283A (en) * 1971-01-06 1973-04-03 Xerox Corp Electrostatographic developer containing uncoated glass-ceramic carrier particles
US3901698A (en) * 1971-12-10 1975-08-26 Rank Xerox Ltd Method of reversal development using two electrostatic developers
JPS5115992B2 (en) * 1971-12-17 1976-05-20
BE793098A (en) * 1971-12-30 1973-06-20 Xerox Corp ELECTROSTATOGRAPHIC DEVELOPER
US3808026A (en) * 1972-03-13 1974-04-30 Xerox Corp Liquid development of electrostatic latent image
GB1442835A (en) * 1972-10-21 1976-07-14 Konishiroku Photo Ind Toner for use in developing electrostatic images
US3925219A (en) * 1973-06-29 1975-12-09 Minnesota Mining & Mfg Pressure-fixable developing powder containing a thermoplastic resin and wax
US4122024A (en) * 1974-05-30 1978-10-24 Xerox Corporation Classified toner materials
US3969251A (en) * 1974-05-30 1976-07-13 Xerox Corporation Developer mixture
US3977871A (en) * 1975-08-15 1976-08-31 International Business Machines Corporation Electrophotographic developer with fibers of polytetrafluoroethylene
US4078930A (en) * 1975-10-28 1978-03-14 Xerox Corporation Developer compositions comprising toner and carrier
US4065305A (en) * 1976-03-01 1977-12-27 Xerox Corporation Xerographic developer
JPS5560960A (en) * 1978-10-31 1980-05-08 Agfa Gevaert Nv Composition for developing electrostatic image and method of development
US4304843A (en) * 1978-11-22 1981-12-08 E. I. Du Pont De Nemours And Company Dry toner with improved toning uniformity
US4299904A (en) * 1978-11-28 1981-11-10 Sri International Photographic image enhancement method employing photoluminescence
JPS5950061B2 (en) * 1979-04-09 1984-12-06 富士ゼロックス株式会社 Toner for developing electrostatic latent images
AU532173B2 (en) * 1979-06-13 1983-09-22 Mitsui Toatsu Chemicals Inc. Electrophotographic toner
JPS6050511A (en) * 1983-08-31 1985-03-20 Hitachi Ltd Liquid crystal display element
KR890004563B1 (en) * 1984-04-03 1989-11-15 미따코오교오가부시기가이샤 Nagatively charger for electrophotography
US4966824A (en) * 1988-06-06 1990-10-30 Spectrum Sciences Liquid toner composition containing two different charge directors
US4947201A (en) * 1988-06-06 1990-08-07 Spectrum Sciences Imaging system
US4877699A (en) * 1988-08-25 1989-10-31 Eastman Kodak Company Electrophotographic luminescent amplification process
US5080995A (en) * 1990-06-29 1992-01-14 Xerox Corporation Processes for toner pigment dispersion
US5087538A (en) * 1990-07-02 1992-02-11 Xerox Corporation Toner and imaging processes
US5142337A (en) * 1990-10-09 1992-08-25 International Business Machines, Corp. Printing grey scale images
EP0658821B1 (en) * 1993-11-30 1999-01-13 Konica Corporation Two-component type developer and image forming process
US6162573A (en) * 1994-11-30 2000-12-19 Xerox Corporation Blended custom color toners and developers
US6083654A (en) * 1998-12-21 2000-07-04 Xerox Corporation Toner compositions and processes thereof
US10705442B2 (en) 2016-08-03 2020-07-07 Xerox Corporation Toner compositions with white colorants and processes of making thereof
CN115285968A (en) * 2022-07-29 2022-11-04 东北林业大学 A kind of method and application of preparing cellulose nano carbon balls by adopting o-phenylenediamine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618551A (en) * 1948-10-20 1952-11-18 Haloid Co Developer for electrostatic images
US2735785A (en) * 1953-07-30 1956-02-21 Process of electrostatic printing
US2817767A (en) * 1953-11-23 1957-12-24 Haloid Co Xerographic development
CA565006A (en) * 1954-12-23 1958-10-21 The Battelle Development Corporation Tripartite developer for electrostatic images
US2917460A (en) * 1955-06-17 1959-12-15 Ibm Powder compositions useful as electroscopic toners
US3010842A (en) * 1955-08-29 1961-11-28 Xerox Corp Development of electrostatic images
BE553789A (en) * 1955-12-29
US2986521A (en) * 1958-03-28 1961-05-30 Rca Corp Reversal type electroscopic developer powder
US3013890A (en) * 1958-07-08 1961-12-19 Xerox Corp Process of developing electrostatic images and composition therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542681A (en) * 1968-07-10 1970-11-24 Gaf Corp Negative working electrostatic toners
US4302201A (en) * 1976-06-02 1981-11-24 Canon Kabushiki Kaisha Method for developing electrical latent images

Also Published As

Publication number Publication date
NL254973A (en)
LU39008A1 (en) 1960-09-28
DE1206306B (en) 1965-12-02
SE306667B (en) 1968-12-02
US3236776A (en) 1966-02-22
BE594137A (en)
CH381983A (en) 1964-09-15

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