Receptacles – Closures – Removable closure retained by ductile in situ deformation
Patent
1996-03-21
1997-11-11
Shoap, Allan N.
Receptacles
Closures
Removable closure retained by ductile in situ deformation
220609, 220622, 220624, B65D 4112
Patent
active
056854498
ABSTRACT:
A lug lid (10) which closes an open head pail (12) has lugs (31) that overlap the annular rim (19) of the pail and which are crimped thereabout to attach the lid to the pail. An annular expansion bead (38) is formed in the lid to enable the lid to expand to relieve some of the increases in internal pressure which might occur in the container. Sacrificial depressions (46) are formed in the lid (10) adjacent the expansion bead (38) with each sacrificial depression radially aligned with a lid lug (31). The sacrificial depressions selectively weaken the lid to control the formation of wrinkles (47) in the lid in response to increased pressure within the materials container, with such wrinkles being formed in radial alignment with the lugs of the lid, where the connection between the lid (10) and the pail (12) is strongest.
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Brockway Standard, Inc.
Newhouse Nathan
Shoap Allan N.
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