Bottles and jars – Closures – Frangible member or portion
Reissue Patent
1996-03-22
2001-06-26
Moy, Joseph M. (Department: 3727)
Bottles and jars
Closures
Frangible member or portion
C215S318000, C220S296000
Reissue Patent
active
RE037243
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
This invention relates to containers such as blow molded plastic jugs which are widely used in the dairy industry and others for the expendible packaging of dairy products and other liquids and tamper indicating caps for engagement thereon.
2. Description of the Prior Art
Prior neck finishes on containers of this type may be seen in U.S. Pat. Nos. 2,162,711 of June, 1939; 2,162,712 of June, 1939; 3,650,248 of March, 1972; 3,980,195 of September, 1976; 4,354,609 of October, 1982; 4,402,415 of September, 1983, 4,418,828 of December, 1984; 4,497,765 of February, 1985, 4,534,480 of August, 1985; and 4,561,553 of December, 1985.
In each of the above U.S. Patents there are individual neck spiral thread configurations which require a cap with a matching single spiral thread configuration for engagement thereon and have the common fault of requiring selective testing rotation of the cap on the threaded neck of the container before the single thread patterns engage.
Additionally, partial semi-annular thread patterns comprising ribs are disclosed in U.S. Pat. Nos. 4,589,461 of May, 1986 and 4,666,053 of May, 1987.
In the '561 patent, several short angular ribs are circumferentially spaced on the inner surface of the depending annular wall of a cap and in the '053 patent a pair of vertically spaced short annularly disposed ribs are disclosed on the neck finish of the container.
Additional segmented semi-annular thread patterns are disclosed in U.S. Pat. Nos. 3,885,696, 4,298,129 and 5,213,224.
In U.S. Patent '696, a closure for a container with a lid is disclosed in which a series of separate partial multiple thread patterns are formed on a neck finish. Each of the threads extend only a partial way on the neck finish arc limited to an effective two vertical threads.
In U.S. Patent '129, a child-proof snap on twist off safety cap and container is disclosed in which an annular barrier flange is positioned on the bottom edge of the cap which requires a quarter turn twist to disengage for removal of the cap.
In U.S. Patent '224, a snap on screw off cap and container neck is disclosed having non-vertical fastening configuration ratchet teeth and a number of lead-in thread configurations.
The present invention provides an improved novel neck finish for a container such as a blow molded plastic jug on which a multiple spiral thread pattern configuration of continuous spiral threads are engaged in vertical and circumferentially spaced relation to one another with a thin wall plastic cap that may be pushed onto the container, snapping over three threads of the multiple spiral thread pattern, the cap having a top and a depending annular wall with multiple annular spiral thread patterns circumferentially and vertically spaced formed on the inner surface of said depending wall of the improved cap. The combination of the improved cap and improved neck finish of the container results in a rapid and positive engagement of three of the multiple continuous thread patterns on the respective neck finish with those on the inner surface of the depending wall of the cap requiring a final partial turn of the cap after sealing the closure.
SUMMARY OF THE INVENTION
A novel neck finish on a container such as a blow molded plastic jug forms multiple spiral thread patterns as the neck finish, the thread patterns being circumferentially spaced with respect to beginning and end and presenting multiple lead-in thread configurations adjacent the top of the blow molded container and its neck finish such as seven lead-in points circumferentially spaced with respect to one another and each point comprising the upper lead-in end of a continuous spiral thread formed on the neck finish and terminating on the lowermost portion of the cylindrical portion of the blow molded jug or container. The matching cap has registering multiple thread patterns spaced vertically and horizontally so that as for example seven lead-in ends of seven spiral threads on the neck finish of the container will readily and quickly engage multiple circumferentially spaced areas between the ends of seven circumferentially spaced continuous spiral thread patterns extending from adjacent the inner surface of the top of the cap to spaced positions near the bottom of the depending annular wall of the cap. Substantially improved application of the caps to the neck finishes of the containers is achieved as well as very substantially increased liquid sealing engagement between the multiple spiral thread patterns on the container neck finish and on the inner surface of the depending wall of the improved cap.
REFERENCES:
patent: 2162711 (1939-06-01), Hamberger
patent: 2162712 (1939-06-01), Hamberger
patent: 3650428 (1972-03-01), Miller
patent: 3885696 (1975-05-01), Eberhardt
patent: 3980195 (1976-09-01), Filmore
patent: 4298129 (1981-11-01), Stull
patent: 4354609 (1982-10-01), Hidding
patent: 4402415 (1983-09-01), Hopley
patent: 4418828 (1983-12-01), Wilde et al.
patent: 4497765 (1985-02-01), Wilde et al.
patent: 4534480 (1985-08-01), Santostasi et al.
patent: 4561553 (1985-12-01), Crisci
patent: 4589561 (1986-05-01), Crisci
patent: 4660053 (1987-04-01), Concoran et al.
patent: 5213224 (1993-05-01), Luch
patent: 2114553 (1983-08-01), None
Crisci Harry E.
Crisci Robert E.
Molinaro Luca
Flehr Hohbach Test Albritton & Herbert LLP
Moy Joseph M.
Portola Packaging, Inc.
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