Blackboard eraser handle
OwnerStephanie A. Vlahosinventor
Life of this patent
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Abstract
A detachable handle for use on erasers having absorbent material attached to a flat, rigid backing plate such as the common blackboard eraser. A "C" shaped rigid strap contains "C" shaped notches in the ends thereof. These notches are disposed to face one another and to engage opposite edges of the eraser backing plate. The notches are sized to frictionally retain the backing plate thereby providing a handle to control the eraser during use.
Claims14
A detachable handle for an eraser having an absorbing material attached to a flat rigid rectangular backing plate having edgewalls of predetermined thickness and used to erase chalk or grease pen marks from black boards, white boards and the like, comprising a unitary, resiliently rigid structure having a predetermined transverse width and a predetermined longitudinal length related to the width and length of said backing plate, said structure including a "C" shaped strap in the longitudinal direction and having two "C" shaped notches along opposite edges thereof perpendicular to said longitudinal direction and disposed to face one another for overlying clamping engagement with opposite edgewalls of said rigid backing plate and wherein the untensioned longitudinal dimension between the interior endwalls of said notches is slightly less than the dimension of said backing plate between said engaged edgewalls thereof, said handle structure being under tension when engaged on said eraser.
A detachable handle for an eraser having an absorbing material attached to a flat, rigid generally rectangular backing plate and used to erase chalk or grease pen marks from blackboards, white boards and the like comprising a unitary structure including a rigid base plate, a "C" shaped handle grip attached to the upper side of said base plate and clamping means for clamping the lower side of said base plate to said eraser backing plate, said clamping means comprising "J" shaped sides facing each other and depending from opposite edges of said base plate, said facing sides including interior opposed notches sized and spaced to receive opposite edgewalls of said base plate in overlying frictional clamping engagement therewith.
Dependencies are inferred from the claim text.