Blackboard eraser

Details Blackboard eraser Blackboard eraser

1975-03-03

1977-02-15

Feldman, Peter

Brushing, scrubbing, and general cleaning

Implements

Brush or broom

15192, 15221, A46B 302, A46B 902

Patent

active

040075095

ABSTRACT:
Blackboard eraser having a handle made of foamed plastic. Discreet rows of fiberglass filaments for cleaning off the chalk are secured to the bottom of the handle. Channels between the rows collect dust during the erasing operation so that the fibers don't clog. Preferably, the channels are closed off to prevent dust from falling away during erasing. The channels are self-cleaning in that the dust falls away when the eraser is placed on the sill.

REFERENCES:
patent: 522469 (1894-07-01), Kious
patent: 957078 (1910-05-01), Miller
patent: 1020373 (1912-03-01), Seaboyer
patent: 1359104 (1920-11-01), Rheinberger
patent: 1685328 (1928-09-01), Kogler et al.
patent: 3072945 (1963-01-01), Peterson
patent: 3577839 (1971-05-01), Charvat et al.

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