Method for making tamper-evident container closure

Details Method for making tamper-evident container closure Method for making tamper-evident container closure

1987-12-29

1990-02-27

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264268, 425809, B29C 5302

Patent

active

049044354

ABSTRACT:
A method of making a tamper-evident closure cap including the steps of forming a one piece closure cap from a plastic material having a top, a skirt depending from the top and a tamper-evident band depending from the skirt. The band has a radially inward directed rib and an annular portion between the skirt and the tamper-evident band. The annular portion is engaged with a cutting blade which has a cutting edge and series of spaced notches. The blade and the cap are rotated to form a plurality of circumferentially spaced bridges with a series of angularly inwardly disposed tabs.

REFERENCES:
patent: 3348718 (1967-10-01), Musy
patent: 4398875 (1983-08-01), Kawashima
patent: 4497765 (1985-02-01), Wilde
patent: 4565295 (1986-01-01), Mori
patent: 4588100 (1986-05-01), Itsubo
patent: 4595547 (1986-06-01), Herr
patent: 4613052 (1986-09-01), Gregory

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