Receptacles – Closures – Removable closure retained by ductile in situ deformation
Patent
1973-12-26
1976-06-22
Lowrance, George E.
Receptacles
Closures
Removable closure retained by ductile in situ deformation
B65D 4310
Patent
active
039646351
ABSTRACT:
A recessed, rim-locking closure for attachment to a wide-mouth container of the type having an externally projecting curled rim or bead surrounding the open mouth thereof, such as the well-known one-piece nestable container produced from thermoplastic sheet material by a thermoforming process, the peripheral vertical wall surrounding the recessed central portion of the closure having a series of radially outwardly projecting lugs spaced apart therearound, each lug having a lower portion which is tapered upwardly and outwardly to facilitate centering of the closure on the container by mechanical closure-applicating equipment, the lugs also having a substantially vertical upper section to frictionally engage the inside of the mouth of the associated container to improve the resistance of the closure to turning relative to the container. Such a closure may be made of one-piece thermoplastic material by thermoforming a thermoplastic sheet material of a suitable composition, preferably in a female mold.
REFERENCES:
patent: 3173571 (1965-03-01), Cserny et al.
patent: 3302822 (1967-02-01), Edwards
patent: 3409123 (1968-11-01), McCormick
patent: 3583596 (1971-06-01), Brewer
patent: 3643830 (1972-02-01), Kinney
patent: 3773207 (1973-11-01), Dokoupil et al.
patent: 3883036 (1975-05-01), Mahaffy et al.
Farrow Douglas B.
Holler Edward J.
Lowrance George E.
Meehan Thomas A.
Owens--Illinois, Inc.
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