FREMGANGSMAADE TIL FREMSTILLING AF EN PAPKASSE MED SVEJSTE SOEMME OG APPARAT TIL UDOEVELSE AF FREMGANGSMAADEN

摘要

A method and apparatus for the manufacture of folded paper boxes with a hemmed seal. One of two edges (14) to be overlapped is skived and folded into a hem (24). After the edges are locally heated, blanks move individually and successfully along a conveyor for folding and sealing. Just before sealing, the hemmed edge passes between a hem holder and the conveyor to maintain the hemmed edge. The hem holder is heated to prevent the edges from cooling. In one embodiment hot air directed onto the hem from the hem holder forms an air cushion betwen the hem and hem holder thereby to minimize any contact between the hem holder and the blank.