Bottles and jars – Closures – Cap type
Patent
1985-10-21
1987-06-02
Norton, Donald F.
Bottles and jars
Closures
Cap type
B65D 4104
Patent
active
046696245
ABSTRACT:
A container with an externally threaded neck portion is adapted to be closed with a closure having an internally threaded sidewall engaging the threads of the neck portion. The threads of the neck portion have at least a lower stop disposed at the inner end of the thread. The threads on the container neck are divided; the threads have a maximum pitch of 8 degrees. The stop on the thread on the neck portion and a stop on one part of the divided thread on the closure insure that the closure is stopped at a predetermined position relative to the container after full-threaded rotation of the closure onto the threaded neck portion has been carried out. The threads on the closure are divided by symmetrically disposed gaps. An anti-rotational stop is provided forcibly to retain the closure in its final, fully applied position while permitting the closure to be removed by the application of an initial relatively high torque. The anti-rotational stop is formed in part by a ramp in the root of the thread on the container neck, and in part by the leading end of a land of a part of the divided thread on the closure.
REFERENCES:
patent: 3620400 (1971-11-01), Braun
patent: 4519518 (1985-05-01), Wiles et al.
Page, III Frank C.
Wiles Laurence E.
Norton Donald F.
Specialty Packaging Products, Inc.
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