Dispensing – Resilient wall – With flow controllers or closures
Patent
1978-10-10
1981-02-24
Tollberg, Stanley H.
Dispensing
Resilient wall
With flow controllers or closures
222491, B65D 572
Patent
active
042522579
ABSTRACT:
An automatic closure for collapsible tubes, squeeze bottles, and the like containers of the type formed from resilient plastic material. The container typically is tubelike, provided with a tapered or frusto-conical neck portion terminating in a flattened mouth defining end lips forming an openable closure. Pressure applied to the body of the container remote from the lips to forms a transverse pinch-off across the end portions wherein the lips are deflected or bent along a line of curvature to one side or the other and at an angle to the axis of the container, and wherein the lips are also bowed, having a curved contour. Such pinch-off forms a closure across the neck portion. The pinch-off opens in response to pressure on the walls of the container proximate thereto in a manner to relive the pinch-off and permit the fluid contents to flow. Specifically, the pinch-off is in the following form: the end lips of the neck have a bowed contour about the lengthwise dimension. The neck is deflected or bent laterally at an angle. The pinch-off is at the line of deflection of the bowed end lips. Along this line (pinch-off) the lips are held together in sealing relationship but they will respond to open and release fluid upon exertion of pressure at a predetermined key area adjacent to the pinch-off line.
REFERENCES:
patent: 2143661 (1939-01-01), Schrader
patent: 2663461 (1953-12-01), Brown
patent: 2815150 (1957-12-01), Herzig
patent: 3009498 (1961-11-01), Fohr
patent: 3815794 (1974-06-01), Carlisle
patent: 3878977 (1975-04-01), Carlisle
Silverberg Fred A.
Tollberg Stanley H.
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