Package making – Methods – Plural covers
Patent
1992-09-08
1993-04-06
Culver, Horace M.
Package making
Methods
Plural covers
53457, 53459, 53175, 533841, 53141, 1562731, 493100, B31B 700, B65B 4326, B65B 6100
Patent
active
051992469
ABSTRACT:
Electrostatic method and apparatus for opening liners within containers and maintaining such liners in spread apart disposition preparatory to filling comprises (1) A.C. electrostatic ionizing means for directing a stream of bipolar air ions toward the outer walls of the containers substantially symmetrical therewith, and (2) D.C. electrostatic charging means for directing an ion wind of a single polarity toward the interior of liners within the containers whereby the liners and the containers will be charged to opposite polarities to cause electrostatic pinning of the liners to the interior of the containers and effect opening thereof while the net charge on the package is substantially neutral. Subsequent to opening, the spread apart liners in the containers may be easily filled with the appropriate material.
REFERENCES:
patent: 2328798 (1943-09-01), Gardner
patent: 2815621 (1957-12-01), Carter
patent: 3448000 (1969-06-01), Paquin et al.
patent: 3462909 (1941-08-01), Anderson
patent: 4089255 (1978-05-01), Akoh et al.
patent: 4419855 (1983-12-01), Shanklin
patent: 4824425 (1989-04-01), Stock
patent: 4945709 (1990-08-01), Cerf
patent: 5116444 (1992-05-01), Fox
Bilker Stanley
Culver Horace M.
Illinois Tool Works Inc.
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