METHOD AND APPARATUS FOR CHANGING A STRIP OF SEALED BAG PRECURSORS IN TO OPEN BAGS

摘要

Methods for changing a strip of sealed bag precursors in to open bags are disclosed. The apparatus used in the method is referred to as a transforming machine and includes a separation station and may include a perforation station and a piercing station. The perforation station forms a plurality of end perforations in the multiple layers of a strip of sealed bag precursors. The separation station separates the plurality of end perforations in at least one film layer of the trip to form a plurality of bag openings. The plurality of end perforation are torn by the separation station, which includes manipulating the rotation of a main roller, a pressure roller and at least one separation roller.

主权项

1. A method for changing a strip of sealed bag precursors in to open bags, comprising the steps of:
providing a continuous strip of sealed bag precursors comprising first and second film layers sealingly connected together to define a plurality of consecutive sealed cavities devoid of perforations, thereby defining cavities having substantially no air therein; providing a transforming machine having a perforation station and a separation station; feeding the continuous strip of sealed bag precursors into the transforming machine; perforating, using the perforation station of the transforming machine, a plurality of end perforations in the first and second film layers of each sealed bag precursor, thereby forming a perforated bag precursor; separating, using the separation station of the transforming machine, the plurality of end perforations in only the first layer to create a bag opening, thereby forming a continuous strip of open bags; and dispensing the continuous strip of open bags into a bag filling machine in a continuous process.