Patent ID: 6598255
Filing Date: 2003-07-29
Classification: A46B,B08B,H01L

Abstract:
A cleaning rotary brush comprising a hard base having a rotating working surface opposite an object to be cleaned while mounted to a rotary shaft, and one or more cleaning members projecting from the working surface, the tops of said cleaning members being in contact with said object to be cleaned while rotating in substantially the same plane, wherein:said cleaning members are made of a polyvinyl acetal porous elastomer and are formed as ridged projections positioned continually from inner reference points on the side of the center of rotation of the working surface to outer reference points on the side of the outer periphery of the working surface on each of a plurality of phantom setting lines extending from said inner reference points to said outer reference points, wherein a length in a longitudinal direction of said ridged projections along said phantom setting lines is formed longer than a length in a widthwise direction of the ridged projections, wherein said inner reference points are adjacent to an innermost edge of the working surface, wherein said outer reference points are adjacent to an outermost edge of the working surface, wherein a total area occupied by all of said cleaning surfaces accounts for 20 to 60% of a total area of said working surface, wherein said phantom setting lines are generally straight and extend at an angle to a first reference line passing through said center of rotation of said working surface and extending toward the outermost edge of said working surface in a reverse direction of the rotation of said working surface, and wherein a second reference line extending from said first reference line bisects said phantom setting lines to define a crossing angle of at most 45 degrees between said second reference line and said phantom setting lines such that said phantom setting lines extend in relation to said crossing angle.