Bottles and jars – Closures – Cap type
Patent
1977-07-07
1978-10-31
Price, William
Bottles and jars
Closures
Cap type
215345, 215DIG1, B65D 5300
Patent
active
041229657
ABSTRACT:
A closure for glass containers is formed with a top end wall and a depending annular skirt wall. A base ring depends downwardly from the top end wall and supports a small sealing fin which projects downwardly from base ring to engage the finish of a glass container neck in sealing relation when the closure is applied to the container. The preferred base ring is tapered downwardly and outwardly and facilitates the flow of plastic into the sealing fin during molding of the closure. The closure is threaded onto the container neck and the sealing fin comes into contact with the finish. The application of additional closure torque causes the sealing fin to deform and be crushed. Polypropylene has the desired structural properties of flexural stiffness, hardness and compressive strength to be used for the closure.
REFERENCES:
patent: 2768762 (1956-10-01), Gurnet
patent: 2886198 (1959-05-01), Herter
patent: 3053406 (1962-09-01), Wandell
patent: 3074579 (1963-01-01), Miller
patent: 3151757 (1964-10-01), Martin
patent: 3215297 (1965-11-01), Acton et al.
patent: 3232470 (1966-02-01), Gibson
patent: 3255909 (1966-06-01), Miller et al.
patent: 3370732 (1968-02-01), LaVange
patent: 3586196 (1971-06-01), Barton
patent: 3844439 (1974-10-01), Demers et al.
Kerr Glass Manufacturing Corporation
Price William
Shoap Allan N.
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