US Patent 7404227 Cleaning sheet

A cleaning sheet adapted to be attached to the head (20) of a cleaning tool (2). The cleaning sheet has a wiping portion (1A) that is disposed on the bottom of the head (20) when the cleaning sheet is attached to the head (20). The cleaning sheet has projecting parts (10) and (11) in the wiping portion (1A) which stick out of the forward and backward edges of the head (20) by a projecting length M when the cleaning sheet is attached to the head (20). The projecting parts (10) and (11) have a repulsive force of 0.1 to 100 N/cm when deformed by a length M/3 in the direction opposite the projecting direction. The projection (10) preferably has pointed tips.