Fragment auto-cleaned eraser

Details Fragment auto-cleaned eraser Fragment auto-cleaned eraser

B - Operations, Transporting

43

L

120/56

B43L 19/00 (2006.01)

Patent

CA 2002684

ABSTRACT A fragment self-cleaned eraser comprises a hollow cylindrical eraser, two check valves, an elastic ball and a sponge, hereby fragments of eraser may be drawn into the elastic ball through hollow cylindrical eraser and stuck on the sponge by means of drawing force of the elastic ball.

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