Eraser for blackboard

Details Eraser for blackboard Eraser for blackboard

2011-04-12

2011-04-12

Chin, Randall (Department: 3723)

Brushing, scrubbing, and general cleaning

Implements

Fabric

C015S210100

Reexamination Certificate

active

07921501

ABSTRACT:
An eraser includes a housing (20) having a receiving chamber (21), a collection zone (23) and a plurality of reinforcing ribs (26), a mounting board (30) mounted on the housing, a cleaning member (40) mounted on the mounting board, a support bracket (50) mounted on the housing, a door (60) removably mounted on the housing to cover the collection zone, a hollow separation member (70) mounted in the housing to separate the receiving chamber from the collection zone, and a control valve (80) movable to open the separation member so as to connect the receiving chamber with the collection zone or to close the separation member so as to interrupt a connection between the receiving chamber and the collection zone, and two decorative covers mounted on the housing and each abutting the reinforcing ribs.

REFERENCES:
patent: 511812 (1894-01-01), Spence
patent: 647013 (1900-04-01), Mecredy
patent: 4007509 (1977-02-01), Odhner
patent: 6895627 (2005-05-01), Lin

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