Method for detecting incipient position of meshing engagement between thread of vessel and thread of cap
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United States of America Patent
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Sep 27, 2005
Issued Date -
N/A
app pub date -
Aug 31, 2004
filing date -
Mar 6, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A capping apparatus 1 includes torque sensor 12 which detects an output torque when a chuck 7 is driven for rotation by a motor 9. Initially, a cap 5 is held by the chuck 7. The cap 5 is fitted over a mouth of a vessel 2, and then the chuck 7 is rotated through one revolution in a clamping direction. A resulting output torque is detected by the torque sensor 12, and the output torque rapidly increases at the position where the threads on the cap 5 and the vessel 2 abut against each other (an incipient position of meshing engagement P). The cap 5 is rotated through a given angle of rotation as referenced to the incipient position of meshing engagement P, thus threadably engaging the cap 5 with the vessel 2. The invention allows a uniform clamping of cap 5 at the completion of the capping operation.
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