Patent ID: 8225453

Claim:
A cleaning sheet comprising: a base sheet; a plurality of sets of plural fiber bound materials, each set having a bound portion formed by bundling a plurality of fibers; and a substrate sheet interposed between the base sheet and at least one of the sets of plural fiber bound materials to constitute a cleaning portion together with the at least one of the sets of plural fiber bound materials; wherein: the sets of plural fiber bound materials are disposed side-by-side and each set is joined at its bound portion on at least one surface of the base sheet to form a joining portion; a length of a movable portion extending from the bound portion to a free end of one of the sets of plural fiber bound materials is different from a length of a movable portion extending from the bound portion to a free end of another of the sets of plural fiber bound materials disposed adjacently to the one of the sets of plural fiber bound materials; and the free ends of the movable portions of the adjacently disposed sets of fiber bound materials partially overlap each other to constitute the cleaning portion.