Bottom seal bag making machine

Details Bottom seal bag making machine Bottom seal bag making machine

B - Operations, Transporting

31

B

93/3

B31B 1/64 (2006.01) B26D 1/10 (2006.01) B31B 19/16 (2006.01) B31B 23/26 (2006.01)

Patent

CA 1269557

ABSTRACT OF THE DISCLOSURE A device for use in cutting a sheath of thermoplastic material during the manufacture of bags, pouches and the like is positioned on a bag manufacturing apparatus downstream of the two welding jaws. The cutting device is of reduced mass which has to be accelerated and braked in the course of a cutting cycle. Hence the cutter can obtain very high cutting frequencies. The drive and return tooth timing pulleys of the cutting machine are mounted in a fixed manner on the frame of the bag making machine so that a horizontal plane tangent to the bottom of the two driving and return timing pulleys remains permanently located parallel and above the horizontal sheath cutting plane. An endless belt with a belt displacement device runs over the timing pulleys. The belt displacement device is able to move from a raised position to a lowered position in which the lower middle run portion of the belt is in proximity of the counter blade of the cutter and is in the trajectory path of the sheath to ensure the cooperation between the sheath and the knife which moves along the lower middle run portion to sever the sheath. It is now possible for the knife fixed to the belt to enter into the cutting plane and cut the sheath.

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