Electrostatic abrasive particle coating apparatus and method
Assignee3M Innovative Properties Company
InventorsLouis S. Moren, Brian G. Koethe, John T. Boden
Life of this patent
Estimating the term…
Abstract
A method of applying particles to a backing having a make layer on one of the backing's opposed major surfaces. The method including the steps of: supporting the particles on a feeding member having a feeding surface such that the particles settle into one or more layers on the feeding surface; the feeding surface and the backing being arranged in a non-parallel manner; and translating the particles from the feeding surface to the backing and attaching the particles to the make layer by an electrostatic force.
Claims3
A method of erectly applying abrasive particles to a make layer of a backing comprising:
- selecting abrasive particles having an ANSI grit size less than 20 or a FEPA grit size less than P20;
- supplying the selected abrasive particles onto a feeding surface;
- guiding a backing having a make layer on one of the backings opposed major surfaces along a web path between the feeding surface and a conductive member such that the make layer faces the feeding surface;
- creating an electrostatic field between the feeding surface and the conductive member;
- translating the selected abrasive particles in a non-vertical direction from the feeding surface onto the make layer to erectly apply the selected abrasive particles to the make layer.
Dependencies are inferred from the claim text.