Process and apparatus for processing easy-opening bag

Details Process and apparatus for processing easy-opening bag Process and apparatus for processing easy-opening bag

1990-06-01

1991-11-26

Sipos, John

Package making

Methods

Forming a cover adjunct or application of a cover adjunct to...

53451, 531338, 53551, 533893, 533894, 83660, B65B 6118

Patent

active

050673068

ABSTRACT:
A process for providing easy-opening of a sealed and packed bag by means of an automatic bag-making packer involves pressing on a side margin of an outermost turn of a roll of film a cylindrical surface of a cutting roller mounted in the automatic bag-making packer, the cylindrical surface of the cutting roller having multiple edged projections for forming microcuts in the side margin, so that a resulting sealed and packed bag is easily opened from a side margin of the sealed and packed bag without reducing the mechanical strength of a film constituting the sealed and packed bag. An automatic bag-making packer embodying the process includes a cutting roller, an outer cylindrical surface of which has edged projections, the cutting roller being in close contact with a point on a top surface of an outermost turn of a roll of film mounted on a hollow cylindrical roll core made of paper, the cutting roller rotating and pressing on a side margin of the outermost turn as the film is fed from the roll of film, and a positioning roller adjacent the cutting roller to prevent transverse movement of the roll of film while the cutting roller presses on the side margin of the outermost turn thereof.

REFERENCES:
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patent: 3212381 (1965-10-01), Heyer
patent: 3390507 (1968-07-01), Repko
patent: 3399760 (1968-09-01), Hechler
patent: 3642126 (1972-02-01), Kurtz et al.
patent: 4543279 (1985-09-01), Kai
patent: 4567986 (1986-02-01), Eastwood
patent: 4778058 (1988-10-01), Yamazaki et al.
patent: 4919272 (1990-04-01), Kai et al.

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