Bottles and jars – Closures – Closure expands responsive to internal receptacle pressure
Patent
1994-06-03
1995-10-17
Shoap, Allan N.
Bottles and jars
Closures
Closure expands responsive to internal receptacle pressure
215331, 220240, B65D 3904, B65D 3912, B65D 4104
Patent
active
054582520
ABSTRACT:
A sealing cap and container combination primarily intended for use in medical applications. The sealing cap of the preferred embodiment includes a central dome-shaped portion, annular portion, and sealing portion. In use, these portions are initially received in the mouth of the container and assume an initial concave shape with the sealing portion of the cap abutting and sealing against the inner surface of the container mouth. Thereafter, as the pressure within the container increases, the concave dome first moves toward a flattened shape and then inverts to a convex shape. As the pressure further increases, the annular portion of the cap then moves to a flattened position substantially perpendicular to the axis of the cap. During all this controlled movement, the sealing force of the cap progressively increases from an initial force to a maximum sealing force. An audible signal arrangement is also included in the design to clearly signal the user when the cap is sufficiently tightened on the container to effect an initial seal.
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American Precision Plastics Corporation
Carson W. Scott
Newhouse Nathan J.
Shoap Allan N.
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