The blackboard eraser and the choke which the powder does not fly

摘要

(57) Abstract Objective The former choke and the blackboard eraser turn off the black sheetThe time the powder of the choke whirls in the air, in those near the black sheet chiThe powder of yoku comes in contact, with respect to health is desirable and entering the breathing apparatus of the personThe ku it was not, but the powder of the choke whirls this device in the air, it is denseWith you lose, the powder of the choke comes in contact with those near the black sheetThe powder which also preventing thing and entering into the breathing apparatus of the person preventsIt is something which offers the blackboard eraser and the choke which it does not fly. Constitution In the material of the existing choke, to magnetize,chiyo where it was and the small quantity made the particulate of the paramagnetic material material mix and madeInside ku and existing blackboard eraser permanent magnet or electromagnet equipmentThe position it does and it uses combining the choke and the blackboard eraser or, the maIt is in the material of the existing choke, the paramagnetic material which magnetizesThe small quantity making the particulate of the material mix, the choke and the existing which it madeInside the blackboard eraser the permanent magnet or the normal magnetism which does not magnetizeThe Characteristic body material or the electromagnet the device is done, uniting the choke and the blackboard eraserYou use together.