Method for manufacturing lockable thermoplastic containers
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United States of America Patent
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-
Jun 16, 1998
Grant Date -
N/A
app pub date -
Aug 7, 1996
filing date -
Aug 7, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for forming thermoplastic containers having a male locking member. The apparatus includes a cavity defining a shape of the container, a stripper movable in a longitudinal direction relative to said cavity, and a retractable lock adjacent to an edge of the cavity. The retractable lock is movable in a transverse direction relative to the cavity between a retracted position and an unretracted position and movable in a longitudinal direction between a first position and a second position. The containers are formed through a process in which the apparatus is sequentially placed in a ready mode, lift mode, disengage mode, and back to the ready mode. In the ready mode, the retractable lock is placed in the unretracted position and first position in order to receive a sheet of plastic material and form a locking member thereon. In the lift mode, the retractable lock is moved in a longitudinal direction from the first position to the second position in order to lift the container from the cavity. In the disengage mode, the retractable lock is moved in a transverse direction from the unretracted position to the retracted position in order to disengage itself from the locking member.
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