Title:
VARIABLE ELECTROSTATIC SPRAY COATING APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO2002085538
Kind Code:
A3
Abstract:
A liquid coating is formed by spraying drops of liquid onto a substrate or a transfer surface from an electrostatic spray head that produces a mist of drops and a wet coating in response to an electrostatic field. During spraying, the electrostatic field is repeatedly altered to change the pattern deposited by the drops. The wet coating can be contacted with two or more pick-and-place devices that improve the uniformity of the coating.
Inventors:
SEAVER ALBERT E
LEONARD WILLIAM K
LEONARD WILLIAM K
Application Number:
PCT/US2002/005434
Publication Date:
May 22, 2003
Filing Date:
February 22, 2002
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
B05B5/025; B05B5/14; B05D1/04; B05D1/28; B05D1/40; B05D1/42; B05D7/00; D21H23/50; (IPC1-7): B05D1/04; B05D1/28; B05C1/08
Domestic Patent References:
| WO1994018011A1 | 1994-08-18 | |||
| WO2000064592A1 | 2000-11-02 |
Foreign References:
| US6227465B1 | 2001-05-08 | |||
| EP0516462A1 | 1992-12-02 | |||
| US4011991A | 1977-03-15 |
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