Thermal welding and pre-cutting mechanism for use in garbage bag making machine, has two resistors arranged in parallel with each other, and laser sensor for measuring distance between laser sensor and plastic strip

摘要

The mechanism has a rolling stone (2) fixed at bottom of a bed (1), and a plastic strip (3) arranged in a middle part of the rolling stone. A voltage regulating device includes an input voltage compensator (4) that is arranged on a top part of the rolling stone. Two resistors (8a, 8b) are arranged in parallel with each other, and a laser sensor (9) measures a distance between the laser sensor and the plastic strip. A band is arranged on an output roller (10), where the band includes two movable rollers (6a, 6b).