Anticocking high torque removal closure assembly

Details Anticocking high torque removal closure assembly Anticocking high torque removal closure assembly

1986-09-02

1987-10-06

Norton, Donald F.

Bottles and jars

Closures

Cap type

B65D 4104

Patent

active

046977155

ABSTRACT:
The anticocking high torque removal closure assembly comprises a container having a neck, a cap threadingly received on the neck, a first thread on the neck, a second thread in the cap, and a rib in the cap spaced from a revolution of the second thread and having a sharp outer edge. The first thread has an upper surface, a side surface and a lower surface, the second thread has an upper surface, a side surface and a lower surface.
A first "allowable cock dimension" (ACD) is defined between a horizontal line through the junction of the side surface and the lower surface of the second thread and a horizontal line through the junction of the neck with the upper surface of the first thread when the cap is received on the neck. A second "minimum cock dimension" (MCD) is defined between a horizontal line through the sharp outer edge of the rib and a horizontal line through the junction between the side surface and the lower surface of the first thread when the cap is received on the neck.
The "minimum cock dimension " MCD is designed to be greater than the "allowable cock dimension" for extremes of tolerances of the cap and the neck, such as neck high/cap low or neck low/cap high, to prevent cocking of the first thread above the rib when the cap is received on the neck.

REFERENCES:
patent: 4125201 (1978-11-01), Birch
patent: 4349116 (1982-09-01), Luenser

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