GB1327942A - Method and apparatus for electrostatically classifying particles - Google Patents

Method and apparatus for electrostatically classifying particles

Info

Publication number
GB1327942A
GB1327942A GB4878870A GB4878870A GB1327942A GB 1327942 A GB1327942 A GB 1327942A GB 4878870 A GB4878870 A GB 4878870A GB 4878870 A GB4878870 A GB 4878870A GB 1327942 A GB1327942 A GB 1327942A
Authority
GB
United Kingdom
Prior art keywords
particles
drum
charge
variable
resp
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
GB4878870A
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 GB1327942A publication Critical patent/GB1327942A/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
    • G03G9/09—Colouring agents for toner particles
    • G03G9/0906—Organic dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/08—Sorting according to size measured electrically or electronically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0266—Investigating particle size or size distribution with electrical classification
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electrostatic Separation (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

1327942 Classifying toner particles XEROX CORP 14 Oct 1970 [20 Oct 1969] 48788/70 Heading B2J Large particles are removed from small particles by selective transfer from a first surface to a second conductive surface by a process involving applying a variable charge to the particles on. the first surface, placing the second surface of variable distance from the first surface and applying a variable bias potential of opposite polarity to the second surface. Successive transfer to one or more further conductive surfaces may be made. As shown, after particles have been deposited on a charged xerographic drum 20, the charge removed by exposure to light and a charge applied to the deposited particles, small particles are retained on drum 20, medium particles are transferred to an electrically biased aluminium drum 30, and large particles are transferred first to drum 30 and then to an electricaly biased aluminium drum 40. Drums 20 and 30 have charging corotrons 24 and 32 resp. Drums 20, 30 and 40 have particle removal means, 26, 33 and 42/44 resp.
GB4878870A 1969-10-20 1970-10-14 Method and apparatus for electrostatically classifying particles Expired GB1327942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86773969A 1969-10-20 1969-10-20

Publications (1)

Publication Number Publication Date
GB1327942A true GB1327942A (en) 1973-08-22

Family

ID=25350380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4878870A Expired GB1327942A (en) 1969-10-20 1970-10-14 Method and apparatus for electrostatically classifying particles

Country Status (5)

Country Link
US (1) US3662884A (en)
JP (1) JPS512250B1 (en)
CA (1) CA949928A (en)
DE (1) DE2051501A1 (en)
GB (1) GB1327942A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938178B1 (en) * 1970-12-02 1974-10-16
US3960738A (en) * 1975-01-02 1976-06-01 Eastman Kodak Company Method for producing improved electrographic developer
US4351604A (en) * 1979-04-26 1982-09-28 Ricoh Company, Ltd. Multi-color electrostatic copying apparatus
US4799452A (en) * 1987-07-23 1989-01-24 Precision Image Corporation Liquid toner recycling system and method
US5578771A (en) * 1993-02-12 1996-11-26 Outokumpu Mintec Oy Method for measuring particle size distribution
JP2008216688A (en) * 2007-03-05 2008-09-18 Casio Electronics Co Ltd Manufacturing method of electrophotographic toner and manufacturing apparatus thereof
JP4893768B2 (en) * 2009-03-25 2012-03-07 ブラザー工業株式会社 Developer supply device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1551397A (en) * 1925-08-25 A corpora
US476991A (en) * 1892-06-14 Thomas a
US263416A (en) * 1882-08-29 lister
US1355477A (en) * 1918-11-04 1920-10-12 United Chemical & Organic Prod Means for separating mixtures
US2428224A (en) * 1943-06-18 1947-09-30 Ritter Products Corp Wiper for rotary electrodes

Also Published As

Publication number Publication date
JPS512250B1 (en) 1976-01-24
US3662884A (en) 1972-05-16
DE2051501A1 (en) 1971-04-29
CA949928A (en) 1974-06-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees