Patent ID: 8950627
Filing Date: 2015-02-10
Classification: B05C,B65D,G01F

Abstract:
1. A method of dispensing material from a material dispensing gun comprising; loading a sausage bag comprising dispensing material into a tube removably attached to a dispensing gun, the tube having an exit end from which the dispensing material is dispensed during operation; locating said sausage bag between the exit end and a single piece piston in said tube, said single piece piston comprising a substantially square-shaped receptacle and first and second ends, the first end having a dome profile with an annular taper extending outwardly toward said second end and a circular seal lip integral with and extending from said annular taper about the perimeter of the piston, the circular seal lip comprising a plurality of substantially equal segments located about the perimeter of the seal lip, the annular taper comprising first and second tapered annular surfaces with the second tapered annular surface extending from the circular seal lip; engaging the sausage bag with the domed first end of the single piece piston located in said tube; advancing said single piece piston against said sausage bag with a rack fixedly attached to said single piece piston such that material located in said sausage bag engaged by said domed first end is dispensed from the exit end of said tube and unadvanced material not engaged by said domed first end extends over said first and second tapered annular surfaces; engaging the unadvanced material in said sausage bag with the circular seal lip; and advancing the unadvanced material with the plurality of substantially equal segments of said single piece piston such that the unadvanced material located in the sausage bag engaged by the plurality of segments is dispensed from the exit end of said tube, dispensing of the unadvanced material being facilitated by a front taper angle and edge angle of a rear edge on each of said plurality of segments.