Caulking tube plunger and enclosure assembly

Details Caulking tube plunger and enclosure assembly Caulking tube plunger and enclosure assembly

1980-08-15

1982-05-25

Spar, Robert J.

Dispensing

With lock or fastening seal

Plural

222327, 222326, B65D 4704, B65D 8300

Patent

active

043312675

ABSTRACT:
A combined caulking tube plunger and enclosure assembly is disclosed which includes a single piece of drawn metal in generally a cup-shaped configuration including a bottom wall, a circular or annular side wall which forms a close fit with the inside diameter of a caulking tube and which provides guidance of the plunger portion through the caulking tube, and an outer rim which is adapted to be rolled over the outer end of a caulking tube to form a closure and seal therewith. A circumferential break-away score or dart is formed in the side wall axially inwardly of the rim which causes the major portion of the side wall and the bottom wall, forming a plunger, to be broken away from the rim upon the application of force by the ram of a caulking gun thus to separate the plunger portion from the rim portion.

REFERENCES:
patent: 2649999 (1953-08-01), Burcit
patent: 2941699 (1960-06-01), Schmidt et al.
patent: 3162337 (1964-12-01), Sabaka
patent: 3211347 (1965-10-01), Phillips
patent: 3319841 (1967-05-01), Berg
patent: 3815791 (1974-06-01), Clark
patent: 3880331 (1975-04-01), Perkins
patent: 4027810 (1977-06-01), Van Manen

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