Eraser crumb cleaner

Claim 1

An eraser crumb cleaner held in the hand like a writing pen for collecting eraser crumbs and the like, simultaneously while erasing on paper comprising: an eraser holder of a hollow cylindrical shape; a suction pipe of a cylindrical shape and of a first inner diameter, said suction pipe being open at both ends and having an axis inclined to the plane of the paper, one end of said suction pipe serving as nozzle opening and a first receiving point of the eraser crumbs, said suction pipe and said eraser holder being fused together like two barrels of a double-barrel gun with said suction pipe positioned under said eraser holder; a cleaning brush; a container of a cylindrical shape and of a second inner diameter, said container having an axis substantially perpendicular to the plane of the paper and positioned within the space formed by the palm of the hand holding the eraser crumb cleaner, the other end of said suction pipe penetrating radially into said container; a baffle fixed integrally into the inside of said container, said baffle being positioned facing said suction pipe; an inlet pipe of a third inner diameter so as to conveniently support the apparatus of this invention on the hand holding the apparatus and rest comfortably on the metacarpal bone area of the index finger adjacent to the thumb, said inlet pipe being substantially equal in diameter to said container, said inlet pipe having substantially equal inclination to the plane of the paper as said suction pipe, the bottoms of said suction pipe and said inlet pipe forming one straight line, the lower end of said inlet pipe penetrating radially into said container; a centrifugal fan having a fan rotor of a fourth diameter and of a backwardly curved-vane type positioned concentrically to said inlet pipe at the upper end of said inlet pipe; an enclosure for said centrifugal fan to provide an appropriate air-outlet area, said enclosure having a cylindrical shape and surrounding said fan rotor, said enclosure being of a fifth inner diameter marginally larger than the fourth diameter and providing sufficient clearance between said enclosure and said fan rotor, said enclosure being positioned with its axis in line with the axis of said fan rotor, said enclosure having equidistant slot openings around its periphery for the passage of the air out of the apparatus of this invention, said slot openings being in line with the fan rotor; an electric motor with its axis positioned colinear with the axis of said fan rotor; a power means for supplying power to the electric motor and a switching means for turning the electric motor on or off.