The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2003
Filed:
Apr. 24, 2001
Applicant:
Inventors:
Albert E. Seaver, Woodbury, MN (US);
William K. Leonard, River Falls, WI (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D 1/04 ; B05D 3/12 ; B05B 5/025 ;
U.S. Cl.
CPC ...
B05D 1/04 ; B05D 3/12 ; B05B 5/025 ;
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.