Reversible belt scraper blade for cleaning high speed conveyor belts

A two-sided longitudinally extending belt scraper blade for a conveyor belt scraper which blade is reversible by rotating the blade about its longitudinal axis comprising:

• a longitudinally extending body formed of a block of rubber,
• said body having a transversely extending flat scraper surface on one side thereof and a second transversely extending flat scraper surface on an opposite side thereof and having spaced generally parallel side walls extending between said surfaces,
• each said side wall being formed with a transversely extending generally L-shaped recess,
• each said recess extending from one of said scraper surfaces to a position on said body beyond the median line thereof and each opening at one of said scraper surfaces,
• a pair of fiber resin-impregnated backing plates, one received in each of said recesses, each of said backing plates having a thickness less than the transverse depth of the associated said recess having an outer edge substantially co-planar with an associated said scraper surface, and having a longitudinal length substantially the same as said body,
• a pair of flat, spaced-apart metal frame members, one extending along each of said side walls in said recesses and in abutting relation with the associated said backing plate, each said frame member having an outer surface substantially in alignment with one of said body side walls,
• a plurality of longitudinally spaced individual slugs extending transversely through said plates and said body and having ends welded to said frame members to form an I-beam like assembly, and
• blade mounting means positioned on said frame members at each longitudinal end thereof for supporting said blade on a belt scraper with one of said scraper surfaces in running engagement with a conveyor belt.

A longitudinally extending conveyor belt scraper blade for a conveyor belt scraper which blade is reversible by rotating the blade about its longitudinal axis comprising:

• a pair of longitudinally extending spaced apart support frames, a plurality of modular scraper segments positioned in end-to-end longitudinal alignment in a space between said frames,
• each said scraper segment including a block of elastomer material, said block having first and second flat scraper surfaces extending respectively above and below said frame members,
• each said block having a pair of relatively rigid backing plates one on each opposed lateral side thereof,
• each of said blocks having embedded therein a pair of ceramic bricks, one for each of said scraper surfaces, with a surface portion of each said brick being exposed at one of said scraper surface and
• fasteners extending between said support frames and engaging said segments and side frames for retaining said segments in said space between said frames.

A longitudinally extending conveyor belt scraper blade for attachment to a belt scraper for cleaning a surface of a bulk material conveyor belt and which is reversible by rotating the blade about its longitudinal axis, comprising:

• a pair of substantially identical, longitudinally extending spaced apart metal plate-like side frames, said side frames having length sufficient to extend across a width of a belt to be scraped,
• a scraper body formed as a block of rubber having lateral sides fitted in the space between said side frames, said body having a height proportioned to extend above and below said side frames and terminating in generally flat upper and lower belt scraper surfaces, said upper surface being above said side frames and said lower surface being below said side frames,
• a pair of substantially identical resin-impregnated fiber backing plates having heights less that the said height of said body, one each of said backing plates positioned between one of said body lateral sides and the adjacent said side frame with an exposed surface thereof in co-terminus relation with one of said scraper surfaces, for supporting a portion of said body which extends above said side frames against deflection when in scraping contact with the conveyor belt,
• means at the transverse ends of said side frames for supporting said blade on the belt scraper, and
• connector means extending between said side frames and through said body and joined to said side frames for securing said side frames in said spaced relation and retaining said body in position between said side frames.

A longitudinally extending conveyor belt scraper blade for attachment to a belt scraper for cleaning the surface of a bulk material conveyor belt, said scraper blade being symmetrical and reversible by rotating the blade about its longitudinal axis, comprising a pair of spaced apart metal side frames, said side frames having a length sufficient to extend across a width of a belt to be scraped, a scraper body formed as a block of elastomer material having lateral sides fitted in a space between said side frames, said body having a height proportioned to extend above and below said side frames and terminated in generally flat upper and lower belt scraping surfaces, said upper surface being above said side frames and said lower surface being below said side frames, a pair of substantially identical relatively rigid backing plates having a wear characteristic which exceeds that of said scraper body, one each of said backing plates positioned between one of said body lateral sides and the adjacent said side frame with an exposed surface thereof in co-terminus relation with one of said scraper surfaces of said body, for supporting a portion of said body which extends above said side frames against deflection when in scraping context with the conveyor belt, means at transverse ends of said side frames for supporting said blade on the belt scraper, and connector means extending between said side frames and through said body joining said side frames to each other and securing said side frames in spaced relation and retaining said body between said side frames.