Title: Method of hermetically sealing soft-drink bottles and like containers

Abstract: A container such as a soft-drink bottle, provided with a narrower upper neck portion threaded in one direction and a wider lower neck portion threaded in the opposite direction, is hermetically sealed with a cap divided by a frangible zone into top and bottom parts having threads complementary to those of the corresponding neck portions. The cap is placed on the container neck with a rotary screw motion which matingly interfits the upper threads while the lower threads are interengaged with a snap fit as the bottom part of the cap elastically expands.

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Inventors: Peraboni, Antonio (Monza, IT)

Application Number: 842352
Filing Date: 1977-10-14
Publication_date: 1979-05-29
Assignee: Prot S.r.l. (Milan, IT)
Primary Class(es): 215/252 53/490, 215/354, 264/238, 264/242, 264/274
Other Classes:
US Patent Ref:

3001657	Sep, 1961	Gamble	215/252.
3310191	Mar, 1967	Kern et al.	215/252.
3787547	Jan, 1974	Stephan	264/249.
3907146	Sep, 1975	Fields	215/317.
3910443	Oct, 1975	Hadley	215/252.
3937348	Feb, 1976	Girala	215/252.
3955696	May, 1976	Finke	215/252.

Other Refs: 195788712444362101

Feb, 1958	AT.
Jun, 1965	CA
Dec, 1931	GB

Primary Examiner: Lowe, James B.
Assistant Examiner:
Attorney: Ross; Karl F.