Fmc Corporation

Danford C Anderson

Peter J Hatchell

Emiel Y Lambrecht

Ronald L Lotto

Sean Kevin Lemerand

Wim Verbeiren

Eric DeSmedt

Paul W Staab

There is provided a torque control assembly for use on a continuous motion bag machine comprising torque driven means and a drive for driving a motor wherein the torque driven means is operatively connected to the motor for lowering a tension in a web prior to the web entering a sealing assembly on the bag machine. There is also provided a continuous motion bag machine comprising the torque control assembly.

Torque control for continuous motion bag machine

There is provided a blanket sealing bag machine having a variable diameter sealing drum comprising a plurality of spindles disposed at a first end of an axle and a like plurality of spindles disposed at an opposing end of the axle, the plurality of spindles being greater than sixteen spindles, the spindles extending radially from the axle. There is further provided a blanket sealing bag machine that maximizes the angle of blanket wrap.

Blanket sealing bag machine

In an apparatus for making plastic bags or the like from a continuous film of material comprising a sealing drum having at least one seal bar for imparting transverse seals to the film at regularly spaced intervals and a perforator having a rotatable perforator blade for imparting transverse perforations to the film at regularly spaced intervals, the film comprising print marks appearing thereon at regularly spaced intervals, an apparatus and method are disclosed for tracking the positions of each print mark and each perforation and comparing the difference between these positions to a desired difference and thereafter adjusting the angular position of the perforator blade until the difference between the positions of each print mark and each perforation is equal to the desired difference to thereby maintain a desired spacing between each print mark and each perforation.

Maintaining perforation phasing

In an apparatus for making plastic bags or the like from a continuous film of material comprising a sealing drum having at least one seal bar for imparting transverse seals to the film at regularly spaced intervals and a perforator having a rotatable perforator blade for imparting transverse perforations to the film at regularly spaced intervals, an apparatus and method are disclosed for tracking the positions of each seal and each perforation and comparing the difference between these positions to a desired difference and thereafter adjusting the rate of rotation of the perforator blade until the difference between the positions of each seal and each perforation is equal to the desired difference to thereby maintain a desired spacing between each seal and each perforation.

Method and apparatus for maintaining proper perforation phasing

An apparatus for use in a system for making bags or the like from a continuous web or sheet of film material, the system including a perforator for imparting series of transverse perforations onto the web at regularly spaced intervals, which comprises a spreader roll having a reduced diameter portion between two enlarged diameter portions; a switch device located adjacent the reduced diameter portion; wherein the large diameter portions cause each series of perforation to pull apart and form a gap as the web is drawn over the spreader roll; and wherein the switch device is capable of being activated each time a gap passes in close proximity to the switch device.

Growing community of inventors

Green Bay, WI, United States of America

Danford C Anderson