Screw-capping device
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United States of America Patent
Stats
-
Sep 16, 1980
Grant Date -
N/A
app pub date -
Mar 23, 1979
filing date -
Apr 7, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for screw-tightening caps on containers such as bottles has a cap chuck head for grasping and holding each cap with holding pawls, a driving shaft, and a friction clutch mechanism constructed separately from the chuck head but mechanically coupling the driving shaft and the chuck head to transmit rotational power to the chuck head at torques below a predetermined maximum torque, at which the cap is screw tightened, friction plates of the clutch mechanism slipping at any higher torque to prevent excessive tightening. The separate construction of the clutch mechanism and the chuck head prevents subsequent engagement of the clutch plates due to reaction forces arising during the screw-tightening operation, thereby preventing excessive tightening.
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