Abrading – Machine – Endless band tool
Reexamination Certificate
2006-09-26
2006-09-26
Rose, Robert A. (Department: 3723)
Abrading
Machine
Endless band tool
C451S489000
Reexamination Certificate
active
07112126
ABSTRACT:
A belt sander includes a sand belt unit including an upper roller, a lower roller located under the upper roller and rotated by a propeller shaft of a drive motor, and two auxiliary rollers located at two sides of the lower roller. Each of the two auxiliary rollers and the lower roller are rotated synchronously in the opposite direction. Thus, the workpiece is pressed by the two auxiliary rollers so that the workpiece is moved forward at a constant speed without acceleration during the grinding process of the sand belt, thereby enhancing the grinding effect of the sand belt on the workpiece.
REFERENCES:
patent: 207717 (1878-09-01), Creager
patent: 592992 (1897-11-01), Lowry et al.
patent: 6146254 (2000-11-01), Wang
patent: 611762 (1978-06-01), None
Bacon & Thomas PLLC
Rose Robert A.
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