Mandrel for forming a bottom in a packaging container

Details Mandrel for forming a bottom in a packaging container Mandrel for forming a bottom in a packaging container

B - Operations, Transporting

31

B

93/48

B31B 1/28 (2006.01) B31B 3/28 (2006.01)

Patent

CA 1290183

ABSTRACT OF THE DISCLOSURE A mandrel used in a packaging machine being in a tubular shape and provided with a cooling chamber at one end so as to cool a plain plate which is positioned at the top of the mandrel and contacts the heated, infolded and compressed bottom of a tubular package carton blank. Four projections are formed on the outer surface of the mandrel so as to contact each corner of the tubular package carton blank to leave it open. A pair of water cooling pipes are provided in the tubular mandrel with a space left between the internal wall of the tubular mandrel and connected to the cooling chamber so that only the bottom of the heat-sealed container made of a tubular package carton blank with thermoplastic coatings thereon is cooled and the side walls of the container are free from moisture condensation. 14

536303

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