Apparatus for controlling machines for making bags or sacks

Details Apparatus for controlling machines for making bags or sacks Apparatus for controlling machines for making bags or sacks

1990-09-24

1992-08-04

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Control of operation by use of templet, tape card, or other...

493 29, 493194, 493204, B31B 2310, B31B 2398

Patent

active

051354608

ABSTRACT:
A machine for forming stacks of bags from a web of synthetic thermoplastic material has feeding rollers for feeding the web to welding jaws which form transverse welds in the web. There is a first motor for operating the feeding rollers and a second motor for operating the welding jaws. A central processing unit controls operation of the respective motors and includes a controller for the first motor for operating the first motor for an increased time and at a reduced speed during feeding of a leading bag in a stack as compared with the time and speed of operation of the first motor during feeding of remaining bags in the stack. This facilitates the removal of a previously formed stack of bags from a machine.

REFERENCES:
patent: 4070951 (1978-01-01), Bala

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