GB1347568A - Method of forming substantially spherical particles - Google Patents

Method of forming substantially spherical particles

Info

Publication number
GB1347568A
GB1347568A GB2497571*A GB2497571A GB1347568A GB 1347568 A GB1347568 A GB 1347568A GB 2497571 A GB2497571 A GB 2497571A GB 1347568 A GB1347568 A GB 1347568A
Authority
GB
United Kingdom
Prior art keywords
rods
cut
particles
spherical particles
mills
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
GB2497571*A
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 GB1347568A publication Critical patent/GB1347568A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/18—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/065—Spherical particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49712—Ball making

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1347568 Making spherical particles XEROX CORP 19 April 1971 [23 March 1970] 24975/71 Heading B3A [Also in Divisions B5 and G2] A method of making spherical particles of substantially uniform size comprises cutting rods of a malleable metal into lengths substantially equal to the rod diameter and continuously impingeing the cut rods against a rigid surface. The particles are used in a developer for latent electrostatic images. The rods are of steel, copper, nickel, aluminium, brass and the like and are drawn down to a diameter of 50-1000 microns. Stainless steel wire when cut is fed to a vibrating mill containing ceramic balls of large diameter relative to the particles and occupying about 80% of the mill volume. Alternatively cut aluminium, brass or low carbon steel wire is impinged against hardened steel targets by a centrifugal throwing wheel and is recirculated via a bucket conveyer. The rods may be cut either individually or in sheaths and the cut rods may also be worked in ball mills, tumbling mills, blast mills and the like. The particles may be coated by conventional techniques to alter their triboelectric properties.
GB2497571*A 1970-03-23 1971-04-19 Method of forming substantially spherical particles Expired GB1347568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2208670A 1970-03-23 1970-03-23

Publications (1)

Publication Number Publication Date
GB1347568A true GB1347568A (en) 1974-02-27

Family

ID=21807744

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2497571*A Expired GB1347568A (en) 1970-03-23 1971-04-19 Method of forming substantially spherical particles

Country Status (7)

Country Link
US (1) US3685113A (en)
BE (1) BE764635A (en)
CA (1) CA941211A (en)
DE (1) DE2114016A1 (en)
FR (1) FR2087879A5 (en)
GB (1) GB1347568A (en)
NL (1) NL7103785A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310611A (en) 1979-06-29 1982-01-12 Eastman Kodak Company Electrographic magnetic carrier particles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781958A (en) * 1972-08-14 1974-01-01 Nasa Method of making rolling element bearings
US4215193A (en) * 1978-11-22 1980-07-29 E. I. Du Pont De Nemours And Company Dry toner process with improved toning uniformity for color developing an imaged tacky and nontacky surface
US4421701A (en) * 1980-11-24 1983-12-20 Phillips Petroleum Company Process for preparing iron-containing refractory balls for retorting oil shale
US4438161A (en) 1980-11-24 1984-03-20 Phillips Petroleum Company Iron-containing refractory balls for retorting oil shale

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310611A (en) 1979-06-29 1982-01-12 Eastman Kodak Company Electrographic magnetic carrier particles

Also Published As

Publication number Publication date
US3685113A (en) 1972-08-22
CA941211A (en) 1974-02-05
BE764635A (en) 1971-09-22
DE2114016A1 (en) 1971-10-14
NL7103785A (en) 1971-09-27
FR2087879A5 (en) 1971-12-31

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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