John H Schultz

US Patent:

41051092, Aug 8, 1978

Filed:

Mar 4, 1977

Appl. No.:

5/774418

Inventors:

John J. Schultz - Palos Park IL

International Classification:

B65G 4500

US Classification:

198499

Abstract:

A scraper apparatus for cleaning the operating surface of an endless conveyor belt is disclosed as mounted in scraping engagement with the belt's operating surface for limited pivotal swinging movement from a belt engaging position to a safety and maintenance position. The apparatus has a biasing portion formed as a pressurized bladder carried by a support member mounted transversely of the belt which individually biases each member of an aligned series of scraper blades into continuous scraping engagement with the belt so as to locally compensate for worn belt areas and worn scraper blades or for obstructions on the belt occurring at one scraper blade without preventing or disturbing continued scraping action of the next adjacent scraper blades. Such localized biasing maintains a constant scraping pressure at each scraper blade and allows the series of scraper blades to float with the belt as it rises and sags with tension variations. The separate scraper blades are readily replaceable without removal of associated fasteners.