Importance

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Abstract

A split bag making machine includes a first primary split draw roller and a second primary split draw roller, each having first and second web contacting sections which are independently rotatable, the first section of the first primary split draw roller being in rolling engagement with the first section of the second primary split draw roller at a first nip, the second section of the first primary split draw roller being in rolling engagement with the second section of the second primary split draw roller at a second nip. A first servo motor is coupled to the first web contacting section of the first primary split draw roller, and a second servo motor is coupled to the second web contacting section of the first primary split draw roller. The respective rotational speeds of the first and second servo motors are controlled by a controller. The split bag making machine also includes a secondary split draw roller positioned upstream of the primary split draw rollers, the secondary split draw roller having a first web contacting section corresponding to the first web contacting sections of the primary split draw rollers and having a second web contacting section corresponding to the second web contacting sections of the primary split draw rollers. The webs are driven by the secondary split draw roller at the upstream end of the synchronization section, and driven by the primary split draw rollers at the downstream end of the synchronization section.

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First Claim