GB1328025A - Method and apparatus for discharging insulating materials - Google Patents

Method and apparatus for discharging insulating materials

Info

Publication number
GB1328025A
GB1328025A GB4441671A GB4441671A GB1328025A GB 1328025 A GB1328025 A GB 1328025A GB 4441671 A GB4441671 A GB 4441671A GB 4441671 A GB4441671 A GB 4441671A GB 1328025 A GB1328025 A GB 1328025A
Authority
GB
United Kingdom
Prior art keywords
ambient medium
transformer
film
ionize
sept
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
GB4441671A
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.)
Cellophane SA France
Original Assignee
Cellophane SA France
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 Cellophane SA France filed Critical Cellophane SA France
Publication of GB1328025A publication Critical patent/GB1328025A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices

Abstract

1328025 Discharging static electricity LA CELLOPHANE 23 Sept 1971 [24 Sept 1970 18 June 1971] 44416/71 Heading H1X A method of discharging insulating material in an ambient medium comprises producing positive and negative ions in the vicinity of the insulating material by corona discharge from an electrode E1, E2 supplied with a first alternating waveform of steep energy gradient whose amplitude is high enough to ionize the ambient medium, followed by a second damped alternating waveform whose amplitude is insufficient to ionize the ambient medium. The second waveform prevents the ions from recombining but does not prevent their migration to the material to be discharged. The ambient medium may be air or nitrogen. Apparatus for carrying out the method comprises a thyristor bridge Th 1 , Th 2 supplied with D.C. by an auto-transformer A and full-wave rectifier P and triggered by a multi-vibrator V. The bridge is connected through an RC circuit to the primary winding of a transformer B the secondary winding of which is connected to two wires E1 and E2 connected in parallel in an earthed casing M adjacent the material to be discharged, e.g. a moving plastics film. Corona wires may be located on both sides of the film. The auto-transformer A provides a means of controlling the rate of charge removal for a given film velocity.
GB4441671A 1970-09-24 1971-09-23 Method and apparatus for discharging insulating materials Expired GB1328025A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7034560A FR2106779A5 (en) 1970-09-24 1970-09-24
FR7122161A FR2142242A6 (en) 1970-09-24 1971-06-18

Publications (1)

Publication Number Publication Date
GB1328025A true GB1328025A (en) 1973-08-22

Family

ID=26215965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4441671A Expired GB1328025A (en) 1970-09-24 1971-09-23 Method and apparatus for discharging insulating materials

Country Status (13)

Country Link
US (1) US3716754A (en)
JP (1) JPS5226439B1 (en)
AU (1) AU462575B2 (en)
BE (1) BE772930A (en)
CA (1) CA935506A (en)
CH (1) CH543217A (en)
DE (2) DE2146796C3 (en)
ES (1) ES395409A1 (en)
FR (2) FR2106779A5 (en)
GB (1) GB1328025A (en)
LU (1) LU63951A1 (en)
NL (1) NL7112970A (en)
SE (1) SE392382B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124434A (en) * 1982-07-21 1984-02-15 Simco Co Inc Controlled emission static eliminator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186237A (en) * 1975-03-17 1980-01-29 Vereinigte Flugtechnische Werke-Fokker Gmbh Multi-component protective covering for construction parts designed to protect against the effects of lightning
US4271451A (en) * 1976-07-20 1981-06-02 Hercules Incorporated Method and apparatus for controlling static charges
JPS5349988A (en) * 1976-10-18 1978-05-06 Canon Inc Electricity reduction method and its device
US4423461A (en) * 1981-10-01 1983-12-27 Enercon Industries Corporation Power supply for corona discharge treatment system
US4486808A (en) * 1982-12-03 1984-12-04 Polaroid Corporation Apparatus for controlling random charges on a moving web
JPH10149892A (en) * 1996-11-20 1998-06-02 Shinko:Kk Power supply unit for de-electrification

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1589781A1 (en) * 1967-04-06 1970-05-14 Bayer Ag Method and circuit arrangement for discharging electrostatically charged objects

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2124434A (en) * 1982-07-21 1984-02-15 Simco Co Inc Controlled emission static eliminator

Also Published As

Publication number Publication date
FR2142242A6 (en) 1973-01-26
DE2146796A1 (en) 1972-03-30
DE2146796B2 (en) 1975-03-27
DE2227678C3 (en) 1981-09-17
US3716754A (en) 1973-02-13
LU63951A1 (en) 1972-03-01
AU462575B2 (en) 1975-06-26
DE2227678A1 (en) 1972-12-21
JPS5226439B1 (en) 1977-07-14
DE2227678B2 (en) 1981-01-15
ES395409A1 (en) 1974-10-01
CH543217A (en) 1973-10-15
FR2106779A5 (en) 1972-05-05
BE772930A (en) 1972-01-17
CA935506A (en) 1973-10-16
AU3378271A (en) 1973-03-29
SE392382B (en) 1977-03-21
NL7112970A (en) 1972-03-28
DE2146796C3 (en) 1975-11-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee