Dispensing cartridge with storage cylinder and dispensing piston having a closure sealed vent bore
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United States of America Patent
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-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Jun 20, 1991
filing date -
Jun 21, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
The dispensing cartridge comprises a storage cylinder and a dispensing piston whose bottom surface is progressively recessed from the piston edge towards an aeration bore. An overflow chamber is disposed around said aeration bore, overflow slots being provided in the wall which forms said aeration bore. Said aeration bore is sealed by a closure whose peg portion extends into said bore and whose head is provided with a surrounding bead which snaps into a corresponding annular groove in the outer wall of said overflow chamber. Such a cartridge prevents a disturbing effect of the material flowing out when the dispensing piston is inserted, and during the aeration procedure.
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