US3881446A - Magnetic brush developing apparatus - Google Patents

Magnetic brush developing apparatus Download PDF

Info

Publication number
US3881446A
US3881446A US434114A US43411474A US3881446A US 3881446 A US3881446 A US 3881446A US 434114 A US434114 A US 434114A US 43411474 A US43411474 A US 43411474A US 3881446 A US3881446 A US 3881446A
Authority
US
United States
Prior art keywords
developer material
developing roller
magnetic brush
sump
developing
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 - Lifetime
Application number
US434114A
Other languages
English (en)
Inventor
Takaji Kurita
Takao Fujiwara
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Application granted granted Critical
Publication of US3881446A publication Critical patent/US3881446A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Definitions

  • developer material is stored in the bottom of the apparatus, while an adjusting plate for adjusting the tips of magnetic brush bristles, a cleaning plate for cleaning the used developer material, a toner supplying means, a developer material stirrer, etc. are arranged near a developer material storing portion.
  • the magnetic brush developing apparatus comprises a housing with an opening adjacent to a conventional photoreceptor surface, a magnetic brush developing roller provided at the lower part of the housing close to the opening of the housing and adjacent to the photoreceptor surface bearing an electrostatic latent image to be developed, a magnetic brush bristle tip adjusting plate provided under and close to the developing roller between the developing roller and the photoreceptor surface, a developer material sump provided under the developing roller, a toner powder dispenser provided above the developing roller to supply the toner, a vaned cylinder having a plurality of vanes forming buckets for conveying developer material rotatably provided above and close to the surface of the developing roller, a used developer material sump provided under the vaned cylinder'and a slit adjusting plate movably attached to the underside of the used developer material sump close to the surface of the developing roller so as to adjust the width of a slit between the developing roller and the used developer material sump, the magnetic brush developing roller further comprising
  • a sump portion 17 for the used developer material is provided in the housing H immediately below and close to the vaned cylinder 14, and a slit adjusting plate 18 is movably attached to the underside of the sump portion 17 close to the developing roller 1 so as to adjust the width of a slit A between the developing roller 1 and the edge of the sump portion 1'7, thus making the amount of developer material to be fed to a developing position B by the developing roller 1 equal to that to be applied to the developing roller 1 through the slit A by the rotation of the vaned cylinder 14.
  • the developing rollers 1 and l comprise outer cylinders 8 and 8' respectively within which three elongated bar magnets 3, 5 and 7 for the roller l and two elongated bar magnets and 21 for the roller ll are secured on the fixed metallic fixtures 2 and 2, the outer cylinder 8 being adapted to rotate counter-clockwise and the outer cylinder 8 clockwise in relation to the fixtures 2 and 2 respectively.
  • vaned cylinder having a plurality of outwardly extending vanes which form buckets for transporting developer material rotatably provided close to the surface of said developing roller and a used developer material sump provided under said vaned cylinder, the majority of developer material on said developer roller being scraped off by vane tips of said vaned cylinder, carried upward in said buckets, and subsequently emptied into said used developer sump for mixing and diffusing of said developer material as said vaned cylinder rotates.
  • a magnetic brush developing apparatus for developing an electrostatic latent image which comprises a housing structure with an opening adjacent to a photoreceptor surface, an upper developing roller and a lower developing roller in said housing structure in parallel to each other and close to said photoreceptor surface, a vaned cylinder having a plurality of outwardly extending vanes which form buckets for transporting developer material rotatably provided above said lower developing roller and also close to said upper developing roller, a toner supplying means provided over said vaned cylinder, and a used developer material sump provided under said vaned cylinder, the majority of developer material on said lower developing roller being scraped off by vane tips of said vaned cylinder and carried upward in said buckets being subsequently emptied into said used developer sump for mixing and diffusion with the remaining part of said developer material in said buckets being supplied onto said upper developing roller as said vaned cylinder rotates.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
US434114A 1973-01-25 1974-01-17 Magnetic brush developing apparatus Expired - Lifetime US3881446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48010756A JPS4998638A (zh) 1973-01-25 1973-01-25

Publications (1)

Publication Number Publication Date
US3881446A true US3881446A (en) 1975-05-06

Family

ID=11759152

Family Applications (1)

Application Number Title Priority Date Filing Date
US434114A Expired - Lifetime US3881446A (en) 1973-01-25 1974-01-17 Magnetic brush developing apparatus

Country Status (4)

Country Link
US (1) US3881446A (zh)
JP (1) JPS4998638A (zh)
DE (1) DE2403128A1 (zh)
GB (1) GB1442532A (zh)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943887A (en) * 1975-02-27 1976-03-16 Xerox Corporation Hybrid crossmixer
US3973518A (en) * 1975-04-28 1976-08-10 Xerox Corporation Cross mixing blending chamber for electrostatic processors and the like
US3977361A (en) * 1975-05-13 1976-08-31 Fuji Xerox Co., Ltd. Magnetic brush developing device
US3995590A (en) * 1975-04-28 1976-12-07 Xerox Corporation Blending chamber for electrostatic processors
US4003335A (en) * 1974-05-21 1977-01-18 Minolta Camera Kabushiki Kaisha Developing material applicator
DE2654280A1 (de) * 1975-12-01 1977-06-08 Hoffmann La Roche Elektronisch abgetastete ultraschall-abbildung
US4048957A (en) * 1974-10-18 1977-09-20 Ricoh Company, Ltd. Magnetic brush developing apparatus for electrophotography
DE2718319A1 (de) * 1976-04-26 1977-11-03 Oce Van Der Grinten Nv Entwicklungseinrichtung fuer elektrostatische ladungsbilder
FR2360920A1 (fr) * 1976-08-02 1978-03-03 Ibm Procede et dispositif a brosses magnetiques multiples pour appliquer un melange de developpement sur une surface photoconductrice portant une image latente
US4127084A (en) * 1975-07-07 1978-11-28 La Cellophane Image support for dry development device
US4143961A (en) * 1974-04-15 1979-03-13 Hiroo Nakamoto Electrophotographic duplication apparatus
US4144839A (en) * 1976-09-24 1979-03-20 Fa. Lumoprint Zindler Kg (Gmbh & Co.) Feeding device for supplying developer powder to a magnetic drum
US4149488A (en) * 1977-02-17 1979-04-17 Siemens Aktiengesellschaft Deflecting guide for developer mixture
US4170195A (en) * 1976-12-24 1979-10-09 Hoechst Aktiengesellschaft Developing apparatus for developing latent electrostatic images
US4492321A (en) * 1982-11-22 1985-01-08 Xerox Corporation Apparatus for dispensing toner particles and sealing the storage chamber thereof
FR2594566A1 (fr) * 1986-02-20 1987-08-21 Ricoh Kk Procede et appareil de developpement d'une image electrostatique latente
WO1988002506A1 (en) * 1986-09-24 1988-04-07 Siemens Aktiengesellschaft Co- and counter-rotating development system for an electro-photographic installation
US4777904A (en) * 1986-12-22 1988-10-18 Xerox Corporation Touchdown development apparatus
US4887132A (en) * 1984-04-06 1989-12-12 Eastman Kodak Company Electrographic development apparatus having a ribbon blender
US5012285A (en) * 1987-05-08 1991-04-30 Minolta Camera Kabushiki Kaisha Developing apparatus including a partitioning arrangement for partitioning the toner accommodating tank
US5890048A (en) * 1997-03-21 1999-03-30 Minolta Co., Ltd. Cleaning device
US20070165095A1 (en) * 2006-01-17 2007-07-19 Fuji Xerox Co., Ltd Image forming apparatus and image density controlling method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5445559U (zh) * 1977-09-05 1979-03-29
JPS5446350U (zh) * 1977-09-06 1979-03-30
DE2831805C2 (de) * 1978-07-19 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Vorratsbehälter für pulverförmigen Toner
JPS5649555U (zh) * 1979-09-21 1981-05-01
US4334760A (en) * 1980-06-18 1982-06-15 Litton Systems, Inc. Toner mechanism for electrophotographic recorder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543720A (en) * 1968-02-29 1970-12-01 Eastman Kodak Co Apparatus for development of electrostatic images
US3638614A (en) * 1969-09-03 1972-02-01 Xerox Corp Electrostatic latent image development apparatus
US3671119A (en) * 1969-12-10 1972-06-20 Agfa Gevaert Ag Electrostatic copying apparatus
US3721209A (en) * 1970-10-09 1973-03-20 Agfa Gevaert Ag Developing unit for electrostatic copying apparatus
US3770345A (en) * 1969-03-21 1973-11-06 Canon Kk Electrophotographic copying apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543720A (en) * 1968-02-29 1970-12-01 Eastman Kodak Co Apparatus for development of electrostatic images
US3770345A (en) * 1969-03-21 1973-11-06 Canon Kk Electrophotographic copying apparatus
US3638614A (en) * 1969-09-03 1972-02-01 Xerox Corp Electrostatic latent image development apparatus
US3671119A (en) * 1969-12-10 1972-06-20 Agfa Gevaert Ag Electrostatic copying apparatus
US3721209A (en) * 1970-10-09 1973-03-20 Agfa Gevaert Ag Developing unit for electrostatic copying apparatus

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143961A (en) * 1974-04-15 1979-03-13 Hiroo Nakamoto Electrophotographic duplication apparatus
US4003335A (en) * 1974-05-21 1977-01-18 Minolta Camera Kabushiki Kaisha Developing material applicator
US4048957A (en) * 1974-10-18 1977-09-20 Ricoh Company, Ltd. Magnetic brush developing apparatus for electrophotography
US3943887A (en) * 1975-02-27 1976-03-16 Xerox Corporation Hybrid crossmixer
US3995590A (en) * 1975-04-28 1976-12-07 Xerox Corporation Blending chamber for electrostatic processors
US3973518A (en) * 1975-04-28 1976-08-10 Xerox Corporation Cross mixing blending chamber for electrostatic processors and the like
US3977361A (en) * 1975-05-13 1976-08-31 Fuji Xerox Co., Ltd. Magnetic brush developing device
US4127084A (en) * 1975-07-07 1978-11-28 La Cellophane Image support for dry development device
DE2654280A1 (de) * 1975-12-01 1977-06-08 Hoffmann La Roche Elektronisch abgetastete ultraschall-abbildung
DE2660888C3 (de) * 1975-12-01 1985-11-14 F. Hoffmann-La Roche & Co Ag, Basel Elektronisch abgetastete Ultraschall-Abbildung
DE2660882C3 (de) * 1975-12-01 1986-02-13 F. Hoffmann-La Roche & Co Ag, Basel Ultraschall-Bildgerät
DE2718319A1 (de) * 1976-04-26 1977-11-03 Oce Van Der Grinten Nv Entwicklungseinrichtung fuer elektrostatische ladungsbilder
FR2360920A1 (fr) * 1976-08-02 1978-03-03 Ibm Procede et dispositif a brosses magnetiques multiples pour appliquer un melange de developpement sur une surface photoconductrice portant une image latente
US4144839A (en) * 1976-09-24 1979-03-20 Fa. Lumoprint Zindler Kg (Gmbh & Co.) Feeding device for supplying developer powder to a magnetic drum
US4170195A (en) * 1976-12-24 1979-10-09 Hoechst Aktiengesellschaft Developing apparatus for developing latent electrostatic images
US4149488A (en) * 1977-02-17 1979-04-17 Siemens Aktiengesellschaft Deflecting guide for developer mixture
US4492321A (en) * 1982-11-22 1985-01-08 Xerox Corporation Apparatus for dispensing toner particles and sealing the storage chamber thereof
US4887132A (en) * 1984-04-06 1989-12-12 Eastman Kodak Company Electrographic development apparatus having a ribbon blender
FR2594566A1 (fr) * 1986-02-20 1987-08-21 Ricoh Kk Procede et appareil de developpement d'une image electrostatique latente
WO1988002506A1 (en) * 1986-09-24 1988-04-07 Siemens Aktiengesellschaft Co- and counter-rotating development system for an electro-photographic installation
US4952979A (en) * 1986-09-24 1990-08-28 Siemens Aktiengesellschaft Isorunning-counterrunning developer station for an electrophotographic means
US4777904A (en) * 1986-12-22 1988-10-18 Xerox Corporation Touchdown development apparatus
US5012285A (en) * 1987-05-08 1991-04-30 Minolta Camera Kabushiki Kaisha Developing apparatus including a partitioning arrangement for partitioning the toner accommodating tank
US5890048A (en) * 1997-03-21 1999-03-30 Minolta Co., Ltd. Cleaning device
US20070165095A1 (en) * 2006-01-17 2007-07-19 Fuji Xerox Co., Ltd Image forming apparatus and image density controlling method
US7586512B2 (en) * 2006-01-17 2009-09-08 Fuji Xerox Co., Ltd. Image forming apparatus and image density controlling method
CN101004577B (zh) * 2006-01-17 2010-07-28 富士施乐株式会社 图像形成设备和图像浓度控制方法

Also Published As

Publication number Publication date
JPS4998638A (zh) 1974-09-18
DE2403128A1 (de) 1974-08-01
GB1442532A (en) 1976-07-14

Similar Documents

Publication Publication Date Title
US3881446A (en) Magnetic brush developing apparatus
US4026241A (en) Magnetic brush developing device for use in electrophotographic copying apparatus
US4194830A (en) Development apparatus
US3703395A (en) Method for development of electrostatic images
US3939801A (en) Magnetic brush developing apparatus
US4155329A (en) Magnetic brush developing device
US4572631A (en) Double sleeve developing device
US3333572A (en) Electrostatic printing
US4080054A (en) Device for replenishing toner particles
US3855969A (en) Quality control of electrostatic image developer mix
US4050413A (en) Magnetic brush crossmixing system
US5519470A (en) Cross mixing paddle wheel
US4614420A (en) Magnetically agitated development system
US3835811A (en) Development apparatus for electrophotographic printing machine
US3865081A (en) Magnetic brush developing apparatus
US3900255A (en) Paddle-wheel development system
US3968773A (en) Magnetic brush developing apparatus
JPH0234695Y2 (zh)
US3888578A (en) Development apparatus for electrophotographic printing machine
US4926790A (en) Auger unit
US4335159A (en) Method for developing latent electrostatic images
US3741372A (en) Conveyor for developer apparatus
US3690912A (en) Method for magnetic development of latent electrostatic images
US3949704A (en) Magnetic brush developing apparatus
JPS5945149B2 (ja) 静電潜像の現像方法