Back up pad with drive adapter and offset passageways

Details Back up pad with drive adapter and offset passageways Back up pad with drive adapter and offset passageways

1988-10-14

1989-07-04

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

156 78, 156 79, 156245, 156250, 156500, 156513, 156514, 264 464, 264154, 428 64, 428 65, 4283044, B32B 326, B32B 520, B32B 3100

Patent

active

048449679

ABSTRACT:
A coated abrasive back up pad is disclosed that may be attached to different types of drive motor assemblies by a simple rearrangement of an adapter included in the back up pad. The back up pad may have passageways with offset portions in a foam layer of the pad positioned to communicate between openings in an abrasive disk attached to the back up pad and vacuum systems in various drive motor assemblies to which it may be attached. A novel method is disclosed for molding the back up pad to form such passageways which includes molding dies into the pad that can later be removed by compressing the foam layer so that the dies cut outlet openings through which they are then removed.

REFERENCES:
patent: 4447484 (1984-05-01), Slosberg et al.
patent: 4474635 (1984-10-01), Adams
patent: 4520061 (1985-05-01), Stoll
patent: 4792475 (1988-12-01), Bien et al.

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