Bottles and jars – Closures – Cap type
Patent
1981-11-16
1982-11-23
Norton, Donald F.
Bottles and jars
Closures
Cap type
215344, 215DIG1, B65D 5300
Patent
active
043601146
ABSTRACT:
A linerless bottle cap having a plurality of resilient concentric sealing rings for abutment with the annular rim about the incipient mouth of the neck of a bottle in sealing the mouth thereof, preferably two concentric sealing rings, the concentric sealing rings being preferably of scalene cross section having a curvilineal depending vertex comprising the sealing lip thereof and in which the outer face thereof extends from the top portion of the cap at an acute angle toward the inner diameter of the skirt thereof, the outermost of the concentric sealing rings being the longer and the others being stepped progressively shorter from the outermost to the innermost thereof, the concentric sealing rings being spaced apart for abutment of the confronting faces thereof on tightening of the cap on the bottle, the confronting faces of the concentric sealing rings having a common terminus adjacent joinder thereof to the top portion of the cap.
REFERENCES:
patent: 2752059 (1956-06-01), Schneider
patent: 3053406 (1962-09-01), Wandell
patent: 3074579 (1963-01-01), Miller
patent: 3255909 (1966-06-01), Miller et al.
patent: 3568871 (1971-03-01), Livingstone
patent: 3815771 (1974-06-01), Marks
patent: 3844439 (1974-10-01), Demers et al.
Norton Donald F.
Thoroughbred Plastics Corp.
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