Vertical form, fill and seal machine having constant film pull l

Details Vertical form, fill and seal machine having constant film pull l Vertical form, fill and seal machine having constant film pull l

1999-02-18

2000-10-17

Sipos, John

Package making

Methods

Enclosing contents within progressively formed web means

53 64, B65B 920, B65B 5704

Patent

active

061313734

ABSTRACT:
A method and apparatus for a vertical form, fill and seal machine to produce a constant pull length of the film and therefore packages of consistent length, whatever the velocity of the machine. When the film is pulled, and the pulling ceases, there is always a finite overrun of pulled film. The method according to the invention determines the velocity for operation of the machine while accounting for the overrun in order to produce packages of constant length. The apparatus includes a motion controller for calculating the velocity and operating the machine at the calculated velocity during the time that the film is being advanced in the vertical form, fill and seal machine.

REFERENCES:
patent: 4288965 (1981-09-01), James
patent: 5318815 (1994-06-01), Groschen, Jr.
patent: 5377474 (1995-01-01), Kovacs et al.
patent: 5533322 (1996-07-01), Bacon et al.

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