Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...
Patent
1988-03-09
1990-01-23
Spruill, Robert L.
Package making
Methods
Forming a cover adjunct or application of a cover adjunct to...
53133, 53451, 53551, B65B 6118, B65B 908
Patent
active
048949752
ABSTRACT:
A method and apparatus for forming a tube and bag from a supply of thin thermoplastic film with the film being formed into tubular shape about a filling tube with the edges of the film brought together and joined solely by a zipper strip having reclosable pressure interlocking members thereon with the zipper strip preferably heat sealed to the film and the zipper strip having a web between the pressure interlocking members which provides a tamper-evident juncture between the edges of the film so that the web must be severed for access to the interior of a bag formed from the film, and individual bags formed from the continuous tube by filling the tube through the filling tube and cross-seaming and cutting individual bags from the continuous film tube.
REFERENCES:
patent: 3172443 (1965-03-01), Ausnit
patent: 3815317 (1974-06-01), Toss
patent: 4355494 (1982-10-01), Tilman
patent: 4532754 (1985-08-01), Hokanson
patent: 4589145 (1986-05-01), Van Erden et al.
patent: 4601694 (1986-07-01), Ausnit
patent: 4709533 (1987-12-01), Ausnit
patent: 4727709 (1988-03-01), Zieke et al.
patent: 4745731 (1988-05-01), Talbott et al.
Bianca Beth
Minigrip Inc.
Spruill Robert L.
LandOfFree
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