Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1984-07-19
1986-10-21
Olszewski, Robert P.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51140, 51141, 51148, 51285, 51102, B24B 2100
Patent
active
046177639
ABSTRACT:
A knife sharpener includes a pair of grinding belts, each supported on at least two rollers. In an area where a knife is sharpened, support rollers of the two belts are spaced apart by a few inches, each including a resilient rubber sleeve over the roller and immediately under the belt to provide a resilient belt cushioning support where the belt is engaged by the knife. A guide roller is positioned between the two support rollers and belts, closely spaced to each of the belts but out of contact therefrom, with the support roller also including a resilient rubber sleeve. A knife to be sharpened is positioned between the guide roller and one of the grinding belts, perpendicular to the axes of the guide roller and the support roller, and twisted in order to force the cutting edge of the knife against the grinding belt while bracing the non-cutting edge of the knife against the rotatable guide roller, for stability and accuracy in grinding the knife edge. When one side of the knife's cutting edge has been ground, the knife is moved over to the other side of the guide roller for engaging its opposite side against the other grinding belt. Both belts move away from the user.
REFERENCES:
patent: 1170898 (1916-02-01), Hancock
patent: 2124592 (1938-07-01), Schaefer
patent: 2124593 (1938-07-01), Schaefer
patent: 2461690 (1949-02-01), Leong
patent: 2601749 (1952-07-01), Johnson
patent: 2624158 (1953-01-01), Hendrickson
patent: 2640303 (1953-06-01), Johnson
patent: 2706367 (1955-04-01), MacCarthy
patent: 2780033 (1957-02-01), Albright
patent: 3526061 (1970-09-01), Battocchi
Freiburger Thomas M.
Olszewski Robert P.
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