METHOD OF MANUFACTURING AN OUTER VACUUM CLEANER BAG FOR AN UPRIGHT CLEANER

摘要

A method of manufacturing the outer cloth bag for an upright vacuum cleaner in which the bag material of a predetermined width is unwound from a reel an fed through guides, material folders and a double headed sewing machine. At the same time zipper chains are fed from rolls on the right and left side of the moving bag material. The zippers are sewn on opposite side edges of the bag, the bag material is cut into predetermined sized panels, and thereafter the side edges of the panels are folded and the zipper halves zipped up to form a tube. At least one open end is closed to form a bag.