Collapsible tube compressing paste dispenser

Claim 1

A collapsible tube compressing paste dispenser, comprising, in combination: (a) two pairs of opposed walls affixed one to another and to a slotted platen, said walls also being rigidly affixed to a baseplate, thereby forming an enclosure having two ends, two sides, a top being said platen and a bottom being said baseplate; (b) a tube compressing roller, rotatably mounted between upper ends of two upright support members projected above the platen through two parallel slots so that the support members can travel longitudinally within the slots, and an internally threaded crossmember positioned below the slotted platen and having an end affixed to a lower end of one upright support member and an opposite end affixed to a lower end of the other upright support member, thereby forming a carriage for said roller; (c) a single lead screw threaded through a threaded hole through said crossmember, supported at an end by a bearing means and supported at an opposite end by an output shaft of an electric gearmotor mounted within said enclosure, with said lead screw directly connected co-axially to the shaft of said gearmotor; (d) a switch means interposed in an electric power supply wire means between an external electric power source and said gearmotor for actuation of said gear-motor and a second switch means connected to the supply wiring and to said gearmotor for reversing polarity and rotation of the gearmotor; (e) a dispenser cover having a top wall affixed to a pair of opposed cover side walls and to a pair of opposed cover end walls, a circular hole through a first of said cover end walls sized to tightly fit around a cylindrical nozzle end of a dispensing adapter piece with thread means within a hole through said adapter piece; (f) a switch actuation and dispensing adapter nozzle closure lever pivotally mounted on a spindle affixed to said first cover end wall 15a and having a return spring means mounted on said spindle in association with said lever.