GB1443122A - Electrographic recording process and apparatus - Google Patents

Electrographic recording process and apparatus

Info

Publication number
GB1443122A
GB1443122A GB1733274A GB1733274A GB1443122A GB 1443122 A GB1443122 A GB 1443122A GB 1733274 A GB1733274 A GB 1733274A GB 1733274 A GB1733274 A GB 1733274A GB 1443122 A GB1443122 A GB 1443122A
Authority
GB
United Kingdom
Prior art keywords
electrode
force
toner
recording medium
forming
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
GB1733274A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1443122A publication Critical patent/GB1443122A/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
    • 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
    • G03G15/0914—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with a one-component toner
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/34—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner
    • G03G15/344—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array
    • G03G15/348—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array using a stylus or a multi-styli array

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

1443122 Electrographic printing MINNESOTA MINING & MFG CO 19 April 1974 [20 April 1973] 17332/74 Headings B6F B6C A process for electrographic recording comprises providing a first electrode 1, a second electrode 3, dielectric recording medium 17 in contact with electrode 3 and toner 13 between the first electrode 1 and the recording medium 17 forming an electronic circuit connection between the electrodes, establishing a first force 21 attracting the toner to the first electrode, and applying an electrical potential V to the electrodes, the electrical potential V establishing a second force 29 opposed to the first force 21, the force 29 being dependent on (a) the potential difference between the portion 15 of toner contacting the recording medium 17 and the second electrode 3, (b) the capacitance between the portion 15 and the second electrode 3, and (c) the time during which the portion 15 has the opposing forces applied to it. One of the parameters affecting the second force 29 can be varied such that when force 29 exceeds force 21, toner portion 15 remains deposited on the recording medium, whereas when force 29 is less than force 21, the portion 15 remains attracted to the first electrode 1. The first force 21 is magnetic, the toner being magnetically attractable. Embodiments described include: replacing both electrodes 1, 3, by a plurality of switchable electrodes (Fig. 7, not shown); providing each electrode with portions 9, 11 of varying resistivity (Fig. 8, not shown); forming electrode 1 as a cylinder and electrode 3 as a shaped electrode either as alpha-numeric characters or styli (Figs. 9, 10, not shown); forming electrode 3 as a cylinder and electrode 1 as styli, the recording medium being either a separate web, or a temporary surface from which a viewed image can be erased or a temporary image can be transferred to a permanent record medium as by removal on transparent adhesive tape which is laminated to paper (Fig. 15, not shown); forming electrode 1 as a cylinder and electrode 3 as a flat plate having a portion 11 of varying dielectric constant such as photoconductive material image-wise exposed (Fig. 16, not shown); or forming electrode 1 as a cylinder with a coating equivalent to portion 9 of varying resistance thereby varying the potential between toner portion 15 and electrode 3 (Fig. 17, not shown).
GB1733274A 1973-04-20 1974-04-19 Electrographic recording process and apparatus Expired GB1443122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00353139A US3816840A (en) 1973-04-20 1973-04-20 Electrographic recording process and apparatus using conductive toner subject to a capacitive force

Publications (1)

Publication Number Publication Date
GB1443122A true GB1443122A (en) 1976-07-21

Family

ID=23387929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1733274A Expired GB1443122A (en) 1973-04-20 1974-04-19 Electrographic recording process and apparatus

Country Status (10)

Country Link
US (1) US3816840A (en)
JP (1) JPS5530228B2 (en)
BR (1) BR7403184D0 (en)
CA (1) CA1033229A (en)
DE (1) DE2419595C2 (en)
FR (1) FR2226695B1 (en)
GB (1) GB1443122A (en)
IT (1) IT1004260B (en)
PH (1) PH11899A (en)
SE (1) SE404254B (en)

Families Citing this family (61)

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Publication number Priority date Publication date Assignee Title
US3879737A (en) * 1974-04-08 1975-04-22 Minnesota Mining & Mfg Integrated electrographic recording and developing stylus assembly
US3946402A (en) * 1974-05-28 1976-03-23 Minnesota Mining & Manufacturing Company Toner applicator for electrographic recording system
US4191961A (en) * 1976-03-31 1980-03-04 E. I. Du Pont De Nemours And Company Magnetic printing process and apparatus
US4121931A (en) * 1976-06-30 1978-10-24 Minnesota Mining And Manufacturing Company Electrographic development process
JPS5310435A (en) * 1976-07-16 1978-01-30 Nippon Telegr & Teleph Corp <Ntt> Image recording method
US4103306A (en) * 1976-07-30 1978-07-25 Epp Corp. Non-impact printer with magnetic ink reorientation
US4101909A (en) * 1976-07-30 1978-07-18 Epp Corp. Magnetic inking apparatus for pulsed electrical printing
US4102305A (en) * 1977-07-01 1978-07-25 Xerox Corporation Development system with electrical field generating means
JPS5414740A (en) * 1977-07-06 1979-02-03 Hitachi Metals Ltd Reverse developing method and apparatus
US4155330A (en) * 1977-07-25 1979-05-22 Eastman Kodak Company Electrographic development apparatus for use with conductive toner
USRE31238E (en) * 1977-11-11 1983-05-10 Tektronix, Inc. Electrographic copier with one-piece belt and styli
JPS55126266A (en) * 1979-03-23 1980-09-29 Hitachi Metals Ltd Electrophotographic method
JPS5846019B2 (en) * 1978-03-23 1983-10-13 日立金属株式会社 magnetic toner
CA1142996A (en) * 1979-03-22 1983-03-15 George W. Fabel Electrographic recording method and apparatus
US4402000A (en) * 1979-03-22 1983-08-30 Minnesota Mining And Manufacturing Company Electrographic recording method and apparatus with control of toner quantity at recording region
US4389478A (en) * 1980-01-07 1983-06-21 Bell & Howell Company Apparatus for and methods of making bimodal electrophotographic copies
US4496232A (en) * 1980-01-07 1985-01-29 Bell & Howell Apparatus for and methods of making bimodal electrophotographic copies
US4316198A (en) * 1980-05-23 1982-02-16 Honeywell Inc. Electrographic recording
JPS5713457A (en) * 1980-06-26 1982-01-23 Canon Inc Image recording method
JPS5754957A (en) * 1980-09-18 1982-04-01 Canon Inc Picture forming method
US4369242A (en) * 1980-09-25 1983-01-18 Minnesota Mining And Manufacturing Company Non-porous and porous Al2 O3 barrier zones in layered electrophotographic device
JPS57124367A (en) * 1981-01-26 1982-08-03 Canon Inc Image forming method and its device
US4371251A (en) * 1981-02-27 1983-02-01 Eastman Kodak Company Electrographic method and apparatus providing improved transfer of non-insulative toner
US4433041A (en) * 1981-03-04 1984-02-21 Hitachi Metals, Ltd. Recording method
US4649094A (en) * 1981-12-08 1987-03-10 Canon Kabushiki Kaisha Image formation method and apparatus in which imaging light and conductive toner are applied to opposite surfaces of a photosensitive member
JPS58108174A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Recorder
US4390607A (en) * 1982-02-03 1983-06-28 Minnesota Mining And Manufacturing Company Charge transfer imaging process
US4460907A (en) * 1982-06-15 1984-07-17 Minnesota Mining And Manufacturing Company Electrographic imaging apparatus
US4454520A (en) * 1982-06-24 1984-06-12 Honeywell Inc. Electrographic recorder with enhanced writing speed
US4442790A (en) * 1982-09-29 1984-04-17 Eastman Kodak Company Magnetic brush development apparatus
US4493882A (en) * 1982-11-29 1985-01-15 Canon Kabushiki Kaisha Image formation method and apparatus
US4496644A (en) * 1983-02-28 1985-01-29 Eastman Kodak Company Electric field adjustment for magnetic brushes
JPS59224369A (en) * 1983-06-03 1984-12-17 Fuji Xerox Co Ltd Image-recording method
JPS59228256A (en) * 1983-06-09 1984-12-21 Canon Inc Display device
US4658275A (en) * 1984-03-23 1987-04-14 Canon Kabushiki Kaisha Image forming apparatus
JPS6150177A (en) * 1984-08-20 1986-03-12 Tohoku Richo Kk Electrode for electrographic recording and its production
NL8500319A (en) * 1985-02-06 1986-09-01 Oce Nederland B V Patents And DEVICE FOR DISPLAYING INFORMATION.
JPS621552A (en) * 1985-06-28 1987-01-07 Toshiba Corp Preparation of recording head
US4666780A (en) * 1985-08-08 1987-05-19 Minnesota Mining And Manufacturing Company Dielectric coating for recording member
DE3689887T2 (en) * 1985-09-17 1994-09-22 Canon Kk Development process and device.
US4739348A (en) * 1985-10-01 1988-04-19 Canon Kabushiki Kaisha Recording head assembly using magnetic toner and image forming apparatus using the same
US4733255A (en) * 1986-05-01 1988-03-22 Minnesota Mining And Manufacturing Company Dielectric coating for recording member
JPS62297865A (en) * 1986-06-18 1987-12-25 Hitachi Ltd Image recorder
US4788564A (en) * 1986-07-10 1988-11-29 Canon Kabushiki Kaisha Board recording apparatus with reduced smudge
JPS63141065A (en) * 1986-11-12 1988-06-13 ミネソタ　マイニング　アンド　マニユフアクチユアリング　カンパニー Insulation cover for recording element
US5064715A (en) * 1986-11-12 1991-11-12 Minnesota Mining And Manufacturing Company Dielectric coating for recording member containing hydrophobic silica
JPS6414050A (en) * 1987-07-08 1989-01-18 Hitachi Ltd Image recording apparatus and method
JPH0193759A (en) * 1987-10-05 1989-04-12 Canon Inc Method and device for color image forming
US4833056A (en) * 1988-02-11 1989-05-23 Minnesota Mining And Manufacturing Company Monocomponent toner powder having strong preference for charging positively
JPH06104368B2 (en) * 1988-04-23 1994-12-21 キヤノン株式会社 Electrostatic image forming device
JPH04211279A (en) * 1990-03-08 1992-08-03 Hitachi Metals Ltd Image recording method
JPH0416866A (en) * 1990-05-10 1992-01-21 Canon Inc Image forming device
US5148204A (en) * 1991-02-28 1992-09-15 Xerox Corporation Apertureless direct electronic printing
EP0501793B1 (en) * 1991-02-28 1997-06-18 Canon Kabushiki Kaisha Tone image forming apparatus
US5374978A (en) * 1992-07-15 1994-12-20 Hitachi Metals, Ltd. Developing method
JPH06289689A (en) * 1993-04-01 1994-10-18 Hitachi Metals Ltd Image forming method
JPH0830078A (en) * 1994-07-13 1996-02-02 Hitachi Metals Ltd Image forming method
US5883656A (en) * 1994-12-15 1999-03-16 Moore Business Forms, Inc. Field effect toning method/apparatus
EP0809158A3 (en) * 1996-05-21 1997-12-10 Agfa-Gevaert N.V. A device for direct electrostatic printing (DEP) comprising a toner composition with good conductivity
US6561628B1 (en) * 1997-01-08 2003-05-13 Hewlett-Packard Company Toner projection system
US20060017799A1 (en) * 2004-07-23 2006-01-26 Manish Sharma Flexible media magnetic laser printer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
US2930351A (en) * 1956-09-04 1960-03-29 Rca Corp Apparatus for developing electrostatic image
US3182591A (en) * 1963-05-22 1965-05-11 Xerox Corp Image forming apparatus and method
US3563734A (en) * 1964-10-14 1971-02-16 Minnesota Mining & Mfg Electrographic process
US3721553A (en) * 1971-04-16 1973-03-20 Rca Corp Method of transferring magnetic toner particles in an image configuration and apparatus therefor

Also Published As

Publication number Publication date
BR7403184D0 (en) 1974-12-24
DE2419595A1 (en) 1974-11-14
IT1004260B (en) 1976-07-10
JPS5530228B2 (en) 1980-08-09
PH11899A (en) 1978-08-29
SE404254B (en) 1978-09-25
AU6809374A (en) 1975-10-23
DE2419595C2 (en) 1985-04-25
US3816840A (en) 1974-06-11
CA1033229A (en) 1978-06-20
FR2226695A1 (en) 1974-11-15
JPS5031827A (en) 1975-03-28
FR2226695B1 (en) 1978-01-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee