PLANE-SCREW DUST-SUCTION ERASER

The utility model discloses a plane-screw dust-suction eraser, which is a tool used to clean the dust on plane in teaching work and life. The utility model is characterized in that a plane-screw-shaped erasing surface is adopted to form a ventilation path, and the path is communicated with a suction...

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Bibliographic Details
Main Author TANG DAZHONG
Format Patent
LanguageEnglish
Published 05.04.1989
Edition4
Subjects
ACCESSORIES FOR WRITING OR DRAWING
ARTICLES FOR WRITING OR DRAWING UPON
BUREAU ACCESSORIES
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Summary:The utility model discloses a plane-screw dust-suction eraser, which is a tool used to clean the dust on plane in teaching work and life. The utility model is characterized in that a plane-screw-shaped erasing surface is adopted to form a ventilation path, and the path is communicated with a suction hole of the eraser. Therefore, when erasing the plane, dust falls into a spiral groove; air flows into a centre hole along the path from outside under the negative pressure generated form an air pump to carry the dust falling in the spiral groove to the eraser. The utility model can clean the dust on plane efficiently.
Bibliography:Application Number: CN1988218397U