Plastic-canister screw closure

Details Plastic-canister screw closure Plastic-canister screw closure

B - Operations, Transporting

67

D

206/18, 210/37

B67D 3/00 (2006.01) B65D 47/12 (2006.01)

Patent

CA 1321776

A B S T R A C T According to the main application, a through airhole 50 opens into an annular channel 48. Such canisters must fulfil their task at temperatures of from -40°C to +75°C. In addition, they are mass- produced goods which, for reasons of price must not have excessively narrow tolerance limits. Furthermore, it may occur that the annular channel 48 has been completely or partially blocked. The resistance to the air flowing back is then too high and the canister does not empty without glugging. Here, the invention envisages that the end positions of the external thread and the internal thread be matched to one another and that at least two through airholes be provided, with the result that statistically one of them is always at least in the vicinity of the through hole of the pouring nozzle.

588104

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