Web sealing method and device, and packaging container producing

Details Web sealing method and device, and packaging container producing Web sealing method and device, and packaging container producing

1998-07-08

2000-04-04

Sipos, John

Package making

Progressively seamed cover web or web folds

With closing of web between package units

53 75, B65B 906, B65B 5700

Patent

active

060446285

ABSTRACT:
Featured is a web sealing device for controlling the sealing pressure so as to carry out a sufficient sealing while monitoring the sealing pressure directly acting on the web. Also featured is a packaging container producing equipment using the aforementioned sealing device and a packaging container producing method using the same. When sealing a part of web W by engaging hooks 16a, 16b, which directly give a sealing pressure to the web W in order to seal a part of both web N by heating and melting both side surfaces of a double web while pressing the same, the strain amount of the hooks 16a, 16b is measured by a strain gauge 23. and the aforementioned sealing pressure is controlled by the controller 21 so that the waveform of the data, in which the values obtained by converting the aforementioned measured strain amount to pressure are continuously recorded in line with the elapse of time, becomes nearly identical to that of the master data, reflecting on the compressing time by the hooks 16a, 16b, compression timing, and the pressing force of the cylinder 18 for actuation of the hooks, and the adjustment of the drive amount of the drive device for the cross sealing of a pair of sealing jaws 7a, 7b.

REFERENCES:
patent: 3925139 (1975-12-01), Simmons
patent: 5147491 (1992-09-01), Thomas et al.
patent: 5653085 (1997-08-01), Suga
patent: 5678390 (1997-10-01), Pruett et al.
patent: 5836136 (1998-11-01), Highberger

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