B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/21
B65B 9/08 (2006.01) B65B 9/12 (2006.01) B65B 9/20 (2006.01)
Patent
CA 1069037
VERTICAL FORM, FILL AND SEAL PACKAGING MACHINE WITH IMPROVED SIDE SEALING MEANS ABSTRACT OF THE DISCLOSURE A vertical form, fill and seal packaging machine has a tube former for receiving flexible packaging material in thin flat strip form and juxtaposing opposite longitudinal edge por- tions thereof in parallel vertically extending relationship to provide a depending tube open at the top. An end sealer provides vertically spaced horizontally extending transverse or end seals across the tube. A product dispenser discharges measured quantities of product into the tube interior through its open upper end. Tube feed means comprises first and second pairs of vertically spaced rolls respectively on opposite external sides of the tube of packaging material and first and second tube feed- ing belts respectively trained over said pairs of rolls. Inner runs of the belts engage the tube and have vertically extending perforate portions. Vacuum generating means communicate with the perforate portions to cause the belts to grip the tube and back- up means within the tube provide for frictional tube feeding action. Improved side sealing means comprises a third pair of rolls spaced vertically along the longitudinal edge portions and a belt trained thereover and in pressure engagement with the edge portions. Back-up means within the tube react the sealing belt pressure. The sealing means is driven in unison with the tube feed means and is both adjustable toward and away form the tube edge portions and movable bodily away from the edge portions to prevent overheating thereof.
311163
Groom James S.
O'brien Edward F.
Putnam Roger L. (jr.)
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