GB1042498A - Reversal developer mix - Google Patents

Reversal developer mix

Info

Publication number
GB1042498A
GB1042498A GB29198/63A GB2919863A GB1042498A GB 1042498 A GB1042498 A GB 1042498A GB 29198/63 A GB29198/63 A GB 29198/63A GB 2919863 A GB2919863 A GB 2919863A GB 1042498 A GB1042498 A GB 1042498A
Authority
GB
United Kingdom
Prior art keywords
particles
parts
stearate
mixture
particle size
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
GB29198/63A
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.)
Bruning Charles Co Inc
Original Assignee
Bruning Charles Co Inc
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 Bruning Charles Co Inc filed Critical Bruning Charles Co Inc
Publication of GB1042498A publication Critical patent/GB1042498A/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
    • G03G9/097—Plasticisers; Charge controlling agents
    • G03G9/09783—Organo-metallic compounds
    • G03G9/09791—Metallic soaps of higher carboxylic acids
    • 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
    • G03G13/09—Developing using a solid developer, e.g. powder developer using magnetic brush
    • 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
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/108—Ferrite carrier, e.g. magnetite
    • 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
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/1087—Specified elemental magnetic metal or alloy, e.g. alnico comprising iron, nickel, cobalt, and aluminum, or permalloy comprising iron and nickel

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1,042,498. Electrophotographic processes. CHARLES BRUNING CO. Inc. July 23, 1963 [Sept. 6, 1962], No. 29198/63. Heading G2H. A reversal developer powder for use in developing latent electrostatic images by applying the powder by means of a magnetic brush, comprises magnetic carrier particles and toner particles of a smaller particle size than the particle size of the magnetic particles, the toner particles consisting of a mixture of pigmented resin particles and particles of one or more metal salts of an aliphatic carboxylic acid having from 12 to 18 carbon atoms per molecule, the metal of the metal salt being one of the metals calcium, barium, lead, magnesium, or zinc. The aliphatic acid may be stearic, palmitic or oleic acids. The magnetic particles maybe iron, ferrites, nickel or cobalt. The magnetic particles and resin particles are chosen to have a triboelectric relation such as to produce a negative charge on the resin particles. Suitable resins are polystyrene, acrylic resins, rosin, asphalt, gilsonite, polyvinyl resins. In one example (Example 1) the following parts by weight of toner constituents are mixed to form a homogeneous mixture:- 5. 7 parts polystyrene, melting point 100‹C. Œ 3‹C., 3. 8 parts polystyrene, melting point 125‹C.Œ 3‹C., 0. 3 parts carbon black, 0.2 parts green pigment. The mixture was cooled and then ground to a particle size from 10 to 20 microns. The pigmented resin then added to the 0.2 parts calcium stearate and 500 parts of powdered iron and the mixture agitated. In other examples, the calcium stearate is replaced by barium stearate, lead stearate, magnesium stearate or zinc palmitate.
GB29198/63A 1962-09-06 1963-07-23 Reversal developer mix Expired GB1042498A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22188862A 1962-09-06 1962-09-06
US387218A US3320169A (en) 1962-09-06 1964-08-03 Developer mixes

Publications (1)

Publication Number Publication Date
GB1042498A true GB1042498A (en) 1966-09-14

Family

ID=26916250

Family Applications (2)

Application Number Title Priority Date Filing Date
GB29198/63A Expired GB1042498A (en) 1962-09-06 1963-07-23 Reversal developer mix
GB13905/65A Expired GB1102411A (en) 1962-09-06 1965-04-01 Developer mixes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB13905/65A Expired GB1102411A (en) 1962-09-06 1965-04-01 Developer mixes

Country Status (6)

Country Link
US (1) US3320169A (en)
BE (2) BE741008A (en)
DE (2) DE1299527B (en)
FR (1) FR1365651A (en)
GB (2) GB1042498A (en)
NL (1) NL297491A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2001147A1 (en) * 1968-02-01 1969-09-26 Rank Xerox Ltd
DE2515665A1 (en) * 1974-04-10 1975-10-30 Konishiroku Photo Ind TONER FOR DEVELOPING LATENT ELECTROSTATIC IMAGES

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411936A (en) * 1965-03-01 1968-11-19 Interchem Corp Developing electrostatic images with a liquid developer containing tetraphenyl tin or zirconyl 2-ethylhexoate
US3411937A (en) * 1965-03-01 1968-11-19 Interchem Corp Method of liquid electrostatic developing
US3793048A (en) * 1968-04-18 1974-02-19 S Nagashima Developing process using toners at a reactor product between a dye having an amino group and organic halide
US4018601A (en) * 1969-06-19 1977-04-19 Xerox Corporation Electrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickel
BE789988A (en) * 1971-10-12 1973-04-12 Xerox Corp COMPOSITION OF DEVELOPER AND METHOD FOR ITS USE
GB1391661A (en) * 1972-02-20 1975-04-23 Oce Van Der Grinten Nv Toner powder and its use in electrophotographic copying processes
US3893935A (en) * 1972-05-30 1975-07-08 Eastman Kodak Co Electrographic toner and developer composition
US4115289A (en) * 1973-08-02 1978-09-19 A. B. Dick Company Dry powdered or liquid developer compositions
CA1041344A (en) * 1974-05-30 1978-10-31 Lewis O. Jones High surface area carrier
US4126454A (en) * 1974-05-30 1978-11-21 Xerox Corporation Imaging process utilizing classified high surface area carrier materials
US3970571A (en) * 1974-12-20 1976-07-20 Eastman Kodak Company Method for producing improved electrographic developer
CH611438A5 (en) * 1976-07-01 1979-05-31 Sublistatic Holding Sa
US4391936A (en) * 1980-11-20 1983-07-05 E. I. Du Pont De Nemours And Company Molding blends
JPS5841508B2 (en) * 1980-12-22 1983-09-12 オリヱント化学工業株式会社 Toner for developing electrostatic images
JPS60186856A (en) * 1984-03-06 1985-09-24 Fuji Xerox Co Ltd Developer
US4621039A (en) * 1984-12-18 1986-11-04 Xerox Corporation Developer compositions with fast admixing characteristics
JPH0774910B2 (en) * 1987-01-14 1995-08-09 富士ゼロックス株式会社 Dry toner
US4985328A (en) * 1988-09-22 1991-01-15 Hitachi Chemical Co., Ltd. Dry toner, dry developer and process for forming electrophotographic images
EP0658821B1 (en) * 1993-11-30 1999-01-13 Konica Corporation Two-component type developer and image forming process
EP1806626A4 (en) * 2004-09-27 2012-08-15 Dainippon Ink & Chemicals Modified nigrosine and process for producing the same, and electrostatic charge image developing toner using said modified nigrosine
JP2013047781A (en) * 2011-07-26 2013-03-07 Kyocera Document Solutions Inc Positively chargeable developer for electrostatic latent image development, and image forming method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3041169A (en) * 1958-03-28 1962-06-26 Rca Corp Reversal type electrostatic developer powder
US2986521A (en) * 1958-03-28 1961-05-30 Rca Corp Reversal type electroscopic developer powder
US2979403A (en) * 1958-10-24 1961-04-11 Rca Corp Electrostatic printing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2001147A1 (en) * 1968-02-01 1969-09-26 Rank Xerox Ltd
DE2515665A1 (en) * 1974-04-10 1975-10-30 Konishiroku Photo Ind TONER FOR DEVELOPING LATENT ELECTROSTATIC IMAGES
US4386147A (en) 1974-04-10 1983-05-31 Konishiroku Photo Industry Co., Ltd. Toner for developing electrostatic latent images

Also Published As

Publication number Publication date
DE1497122A1 (en) 1970-02-19
NL297491A (en) 1900-01-01
BE636477A (en) 1900-01-01
BE741008A (en) 1970-04-01
DE1299527B (en) 1969-07-17
US3320169A (en) 1967-05-16
FR1365651A (en) 1964-07-03
GB1102411A (en) 1968-02-07

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