Patent ID: 7685672
Filing Date: 2010-03-30
Classification: A47L,B43L

Abstract:
1. A vacuum eraser for blackboards comprising: an eraser container consisting of an eraser compartment positioned at a front of the eraser container, a vacuum compartment positioned at a rear of the eraser container, and a collector compartment positioned above the eraser compartment; an eraser bracket assembly secured in the eraser compartment including cylindrical rollers, a fabric eraser belt wound around the cylinder rollers, and an eraser bracket; a brush mounted in the eraser compartment next to an inlet door way which is in communication with the collector compartment, the brush contacting the fabric eraser belt for cleaning vacuum chalk powder from the eraser belt; a vacuum fan mounted to the vacuum compartment and a fan motor coupled to the vacuum fan for driving the vacuum fan; a collector box attached to the collector compartment and slidingly attached to the eraser compartment for storing vacuum chalk powder from the eraser compartment.