Process and apparatus for manufacturing an electret article
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United States of America Patent
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Dec 14, 1999
Issued Date -
N/A
app pub date -
Aug 13, 1997
filing date -
Feb 21, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for electret treatment is described, involving (1) placing the dielectric article between a combination of a first ion-repulsive electrode and a first ion-attractive electrode and between a combination of a second ion-repulsive electrode and a second ion-attractive electrode, under a specified arrangement; (2) supplying a first positive ion and a first negative ion from a first ion generating means between the dielectric article and the first ion-repulsive electrode, the first ion generating means being selected from an alternating current surface discharge element and an alternating current corona-type ion generating element; (3) applying a direct current voltage between the first ion-repulsive electrode and the first ion-attractive electrode to produce a first potential difference therebetween, whereby only one of the first positive and negative ions is moved in a specified direction, and is transferred on the dielectric article; (4) supplying a second positive ion and a second negative ion from a second ion generating means between the dielectric article and a second ion-repulsive electrode, the second ion generating means being selected from specified elements; and (5) applying a direct current voltage between the second ion-repulsive electrode and the second ion-attractive electrode to produce a second potential difference therebetween, whereby only the second ion having polarity opposite to polarity of the first ion transferred on the dielectric article is moved in a specified direction, and is transferred on the dielectric article.

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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
JAPAN VILENE COMPANY LTD | 5-6-4 TSUKIJI CHUO-KU TOKYO 104-8423 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Ito, Daisuke | Ibaraki, JP | 466 | 2877 |
Kawabe, Masaaki | Ibaraki, JP | 19 | 204 |
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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