| 摘要 |
A dispenser for paste-like products consists of a dispensing head (1) and a cartridge (2) containing the paste-like product. The cartridge has its lower end closed by a follower piston slideable along the interior wall surface of the cartridge under action of the exterior atmosphere. In the dispensing head, a pumping device with a pump chamber is provided. An inlet-check valve is provided for prevention of backflow of paste-like material entering the pump chamber through a passage from the interior of the cartridge. At least one part of the inlet-check valve, for instance, a valve seat thereof or, for instance, all parts of the inlet-check valve, namely, a valve seat and a closure member, are provided on an upper cover wall of the cartridge as part of the cartridge. The cartridge is releasably connectable to the dispensing head. After exhaustion of its contents, the cartridge may be detached from the dispensing head and replaced by a filled cartridge. The dispensing head may be optionally provided with a dummy envelope adapted to surroundingly receive cartridges of different shape and/or volume connected to the dispensing head.
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