Patent ID: 6681957
Filing Date: 2004-01-27
Classification: A61C,B05C,B65D

Abstract:
In a dispenser for viscous materials which should be kept separate until the time of application, the improvement wherein the dispenser comprises:a) a cartridge having i) a side wall having an inner surface and an outer surface, ii) a rearward end, iii) a forward end, the forward end having a closed periphery and an open central nozzle, iv) an open rearward end for receiving a piston of a dispensing gun, and v) a rear thrust wall which drives the contents of the dispenser forward as the thrust wall is forced forward by the piston, the thrust wall having a rearward surface, an outer side surface which fits flush with the inner surface of the cartridge, and a forward surface having at least one recess; and b) at least one container having i) a forward end having a neck which fits into the open central nozzle of the cartridge and a closed periphery; ii) a side wall having an inner surface, an outer surface, a rearward end, and a forward end, the container comprising multiple telescopic sections, the rearward end of the at least one container being in slidable contact with the at least one recess of the forward surface of the thrust wall such that the at least one recess captures the sectional wall of the at least one container as the thrust wall moves forward.