System having a dosing dispenser for dispensing pasty or viscous material

A system having a dosing dispenser for dispensing of pasty or viscous material, such as cosmetic creams, adhesives and the like, with an elongated, pin-like housing, a cartridge longitudinally displaceably accommodated therein for material accommodation, an applicator disposed at one end of the housing for material discharge, a pump unit disposed between the cartridge and the applicator, an actuator disposed at the housing particularly in the shape of a slide laterally disposed at the housing or of a push button disposed at the end of the housing, by which the cartridge can be displaced against the pump unit for the purpose of executing a pump stroke, with a shutter button closing the housing end opposite the applicator, and with a piston insertable into the cartridge, wherein the piston abuts with its front face at the end opposite the pump unit of the material column accommodated in the cartridge and lags the column end, wherein:

• the shutter button and the piston are formed as a pre-assembled assembly unit for the introduction of the piston into the cartridge, in which the piston is displaceably guided against or with respect to the shutter button and axially projects in an insertion position into the cartridge from the shutter button, such that from abutment and stop of the piston at the material column during insertion of the assembly unit in the cartridge the shutter button is pushed further onto the piston up to its rest position at the cartridge, in which a locking ball disposed between the front face of the piston and the shutter button sits in sealing position.