Automatic blackboard eraser apparatus

Details Automatic blackboard eraser apparatus Automatic blackboard eraser apparatus

1992-01-27

1993-06-08

Hornsby, Harvey C.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15 98, 15 77, 15 491, 15319, 153403, A47L 1138, A43L 2100

Patent

active

052167763

ABSTRACT:
An eraser includes a track structure to permit reciprocation of an eraser housing laterally of an elongate blackboard plate. The eraser housing includes a drive motor to effect rotation of a drive brush positioned above the blackboard plate, including a dust collection housing and tension roller positioned below the brush housing.

REFERENCES:
patent: 1561320 (1925-11-01), Glidric et al.
patent: 2167296 (1939-07-01), Farmer
patent: 2944276 (1960-07-01), Presser
patent: 3163943 (1965-01-01), Bell
patent: 3731335 (1973-05-01), Chrisp
patent: 3858265 (1975-01-01), Schlick

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