Title: Linerless plastic closure

Abstract: A plastic closure is disclosed which has an integral sealing means formed by an annular resiliently deflectable V-shaped wall section with a downwardly and outwardly projecting corner on it for sealing against an upwardly facing sealing surface on a container. The closure also has a stop member projecting downwardly and inwardly from near the top of the closure skirt for engagement against the container mouth during application of the closure on a container to arrest the axial travel of the closure on the container. The closure may have paraffin or wax lubricant either in the plastic material of the closure or on the inside surface to reduce the torque required to seal the closure on a container.

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Inventors: Dunn, Lloyd G. (Richmond, IN, US)
Willis, Wilburn C. (Hagerstown, IN, US)

Application Number: 935573
Filing Date: 1978-08-21
Publication_date: 1980-06-24
Assignee: Aluminum Company of America (Pittsburgh, PA)
Primary Class(es): 215/329 215/341, 215/344, 215/DIG1, 220/288
Other Classes:
US Patent Ref:

2914206	Nov, 1959	Lowen	215/344.
3160303	Dec, 1964	Healy	215/DIG.
3281000	Oct, 1966	Lowen	215/344.
3360149	Dec, 1967	Roth	215/DIG.
3414151	Dec, 1968	Morrison	215/344.
3568871	Mar, 1971	Livingstone	215/344.

Other Refs:
Primary Examiner: Moy, Joseph Man-Fu
Assistant Examiner:
Attorney: Brownlee; David W.