Abrading – Machine – Rotary tool
Reexamination Certificate
2005-08-23
2005-08-23
Hail, III, Joseph J. (Department: 3723)
Abrading
Machine
Rotary tool
C451S045000, C451S265000, C451S367000, C451S372000, C451S392000, C451S393000, C451S443000, C451S444000
Reexamination Certificate
active
06932684
ABSTRACT:
A reciprocal blade lapping machine (20) is taught that is used for sharpening cutting and shearing blades. The lapping machine consists a convex lap plate (32) mounted on an enclosure (22) rotated by an electric motor (34) connected to a speed reducer (36). A lapping compound distribution system is positioned directly above the lap plate and disperses lapping compound (64) onto the convex upper surface (48) of the lap plate providing an abrasive media for removing parent material from a set of blades placed on the lap plate. A conditioning ring (66), including dead weigh within, is rotatably disposed on the lap plate impacting directly upon the rotating lap plate maintaining the convex contour. A pair of reciprocating work piece holders (74) slideably rest on the lap plate, and alternately slide work pieces (76) backward and forward in a straight line on the rotating lap plate upper surface. Matched set of work pieces (76) are retained by the work piece hold downs (98) located within the work piece holders against the convex surface of the rotating lap plate, for sharpening by honing the mating cutting faces of the work pieces.
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Anderson Gordon K.
Hail III Joseph J.
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