Motor powered paste dispenser

Claim 1

In a device for dispensing a fluent paste confined in a flexible tube sealed shut at one end, through a nipple provided at its opposite end, the combination of: electromotive means for applying torque to said shut end of said tube about a transverse axis to wind up said tube and to extrude paste from said nipple; a solid state electronic circuitry for controlling said electromotive means; a single on-and-off push button switch means which, when actuated, to turn it on, functions through said circuity to cause said electromotive means to wind-up on said tube to extrude paste from said nipple, said switch being turned off immediately when released whereupon said circuity automatically functions to reverse said electromotive means to relax said rotary winding on said tube for a brief period, to draw back into said nipple, paste left hanging therefrom when said switch is released, said electromotive means including a battery powered reversible DC motor having a gear driven shaft; split shaft means co-axially fixed on and driven by said motor shaft and engaging said shut end of said paste filled tube so as to wind said tube on said shaft while said nipple is uncovered and said motor is positively energized, thereby dispensing paste from said nipple; cabinet means for immobilizing said nipple while guiding said motor for free movement directly towards and away from said nipple during the operation of said device; said cabinet means having an end wall, side walls, and a pair of guide tracks formed in parallel opposing relation on the inner faces of said side walls; means for mounting said nipple of a dentifrice paste confining tube in said end wall to extend outwardly through said wall and be fixed therein with said tube disposed in parallelism with and equidistant from said tracks; and platform means slideably interlocking with said tracks and having said motor mounted thereon to guide said motor with said tube winding shaft of said motor intersecting the lengthwise axis of said tube and winding said tube on said shaft to extrude paste from said nozzle while said switch is being actuated.