Patent ID: 7452265
Filing Date: 2008-11-18
Classification: B24B,B24D

Abstract:
1. An abrasive article comprising: a porous abrasive layer having an abrasive surface, the porous abrasive layer comprising a substrate having a first surface, a second surface opposite the first surface, a plurality of abrasive particles affixed to the first surface with at least one binder, and a plurality of openings extending from the abrasive surface to the second surface of the porous abrasive layer; a first filter media having a first surface and a second surface opposite the first surface, the first surface of the first filter media proximate the second surface of the porous abrasive layer, the first filter media comprising a plurality of discrete channels formed by a plurality of channel sidewalls, the channels extending from the first surface of the first filter media to the second surface of the first filter media, the first filter media having a height in the range of 0.5 to 10 millimeters; a second filter media having a first surface and a second surface opposite the first surface, the first surface of the second filter media proximate the second surface of the first filter media; a third filter media having a first surface and a second surface opposite the first surface, the first surface of the third filter media proximate the second surface of the second filter media, the third filter media comprising a plurality of discrete channels formed by a plurality of channel sidewalls, the channels extending from the first surface of the third filter media to the second surface of the third filter media, the third filter media having a height in the range of 0.5 to 10 millimeters; and a fourth filter media having a first surface and a second surface opposite the first surface, the first surface of the fourth filter media proximate the second surface of the third filter media.