B - Operations – Transporting – 43 – L
Patent
B - Operations, Transporting
43
L
B43L 21/02 (2006.01) A47L 5/36 (2006.01) B08B 5/04 (2006.01) B43L 19/00 (2006.01)
Patent
CA 2346602
The invention provides a dust collecting device for an eraser or the like dust reducing device, which comprises a first box, an inside box being fixed inside the first box, wherein an outer space is defined between the first box and the inside box, wherein the first box has an air outlet connected with the outer space and a pass, and wherein the inside box has a trough or opening connecting the outer and inner spaces in which an inhaler component is arranged, a door leaf, which sheathes the pass of the inside box and contacts the inside box to become substantially airtight, wherein a dust bag, which can be ventilated but through which the dust cannot pass can be arranged in the inner space of the inside box, wherein a dust guide pipework, one end of which is pivotably provided with a connection and the other end of which is connectable with an eraser or the like dust producing device, wherein the connection can pierce through the door leaf and a bonding component is provided on one or more portions of the connection so that it can attach tightly with the dust bag. Moreover, the invention provides an eraser for blackboards provided with such dust collecting device.
Liu Te-Hsi
Smart & Biggar
LandOfFree
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