CA2047853A1 - Electrostatic spraying device and method - Google Patents

Electrostatic spraying device and method

Info

Publication number
CA2047853A1
CA2047853A1 CA002047853A CA2047853A CA2047853A1 CA 2047853 A1 CA2047853 A1 CA 2047853A1 CA 002047853 A CA002047853 A CA 002047853A CA 2047853 A CA2047853 A CA 2047853A CA 2047853 A1 CA2047853 A1 CA 2047853A1
Authority
CA
Canada
Prior art keywords
targets
particles
target
outlet
electrostatic spraying
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.)
Granted
Application number
CA002047853A
Other languages
French (fr)
Other versions
CA2047853C (en
Inventor
Timothy J. Noakes
Brian Reed
John J. Chambers
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.)
Procter and Gamble Co
Original Assignee
Timothy J. Noakes
Brian Reed
John J. Chambers
Imperial Chemical Industries Plc
The Procter & Gamble Company
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
Priority claimed from GB909016346A external-priority patent/GB9016346D0/en
Priority claimed from GB919114343A external-priority patent/GB9114343D0/en
Application filed by Timothy J. Noakes, Brian Reed, John J. Chambers, Imperial Chemical Industries Plc, The Procter & Gamble Company filed Critical Timothy J. Noakes
Publication of CA2047853A1 publication Critical patent/CA2047853A1/en
Application granted granted Critical
Publication of CA2047853C publication Critical patent/CA2047853C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/002—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules
    • B05B5/003—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means comprising means for neutralising the spray of charged droplets or particules by mixing two sprays of opposite polarity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/0255—Discharge apparatus, e.g. electrostatic spray guns spraying and depositing by electrostatic forces only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/10—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
    • H02M7/103—Containing passive elements (capacitively coupled) which are ordered in cascade on one source

Abstract

An electrostatic spraying device in which liquid emerging from an outlet of the device nozzle (12) is subjected to an electrical field sufficiently high for the liquid to be drawn from the outlet as one or more ligaments which break up into charged droplets to form the spray. The device is adapted for the spraying of targets which are conventionally difficult to coat electrostatically, eg. targets of insulating material.
This is achieved by the use of circuitry (18, 20, 22, 24) which generates a bi-polar high voltage output having a frequency such that successive clouds of particles are charged with opposite polarity but do not discharge each other in flight. In this way, the charge applied to the particles is effective to assist seeking of the target without leading to build-up of charge on the target.
CA002047853A 1990-07-25 1991-07-25 Electrostatic spraying device and method Expired - Fee Related CA2047853C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB909016346A GB9016346D0 (en) 1990-07-25 1990-07-25 Electrostatic spraying device and method
GB9016346.0 1990-07-25
GB919114343A GB9114343D0 (en) 1991-07-03 1991-07-03 Electrostatic liquid spraying devices
GB9114343.8 1991-07-03

Publications (2)

Publication Number Publication Date
CA2047853A1 true CA2047853A1 (en) 1992-01-26
CA2047853C CA2047853C (en) 2002-11-19

Family

ID=26297385

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002047853A Expired - Fee Related CA2047853C (en) 1990-07-25 1991-07-25 Electrostatic spraying device and method

Country Status (9)

Country Link
US (1) US5222663A (en)
EP (1) EP0468735B1 (en)
JP (1) JP3255433B2 (en)
AT (1) ATE121970T1 (en)
CA (1) CA2047853C (en)
DE (1) DE69109391T2 (en)
DK (1) DK0468735T3 (en)
ES (1) ES2071927T3 (en)
HK (1) HK1006817A1 (en)

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US7078046B1 (en) 1999-08-18 2006-07-18 The Procter & Gamble Company Electrostatically-sprayable topical compositions having insulating external phase and conductive internal phase
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US6531142B1 (en) 1999-08-18 2003-03-11 The Procter & Gamble Company Stable, electrostatically sprayable topical compositions
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CA2409093C (en) 2000-05-16 2009-07-21 Regents Of The University Of Minnesota High mass throughput particle generation using multiple nozzle spraying
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KR100394371B1 (en) * 2000-09-22 2003-08-09 주식회사 에이스랩 Appratus for controlling static eletricity using ultra-fine particles
DE10049204A1 (en) * 2000-10-05 2002-04-11 Alstom Switzerland Ltd Device and method for the electrostatic atomization of a liquid medium
US20020192360A1 (en) * 2001-04-24 2002-12-19 3M Innovative Properties Company Electrostatic spray coating apparatus and method
US6579574B2 (en) * 2001-04-24 2003-06-17 3M Innovative Properties Company Variable electrostatic spray coating apparatus and method
US7247338B2 (en) * 2001-05-16 2007-07-24 Regents Of The University Of Minnesota Coating medical devices
US7579442B2 (en) * 2002-04-16 2009-08-25 Ocugenics, LLC Method for stromal corneal repair and refractive alteration
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DE10228280A1 (en) * 2002-06-25 2004-01-29 Institut für Chemo- und Biosensorik Münster e.V. i.Ins. Device for coating three-dimensional surfaces of substrate e.g. for coating semiconductors with a photoresist comprises spray sources each having a capillary provided with an electrode and arranged in a spray head
US7563396B2 (en) * 2002-12-13 2009-07-21 Ocugenics, LLC Fabrication of improved contact lens utilizing polymer electrospinning
US7849850B2 (en) * 2003-02-28 2010-12-14 Battelle Memorial Institute Nozzle for handheld pulmonary aerosol delivery device
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Also Published As

Publication number Publication date
HK1006817A1 (en) 1999-03-19
JPH0699109A (en) 1994-04-12
US5222663A (en) 1993-06-29
DE69109391T2 (en) 1995-09-07
DK0468735T3 (en) 1995-07-17
CA2047853C (en) 2002-11-19
DE69109391D1 (en) 1995-06-08
JP3255433B2 (en) 2002-02-12
EP0468735B1 (en) 1995-05-03
ES2071927T3 (en) 1995-07-01
ATE121970T1 (en) 1995-05-15
EP0468735A1 (en) 1992-01-29

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Legal Events

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