Abstract

The present invention comprises: a conveying part for conveying paperboard; a paper compressing part having a plurality of compression rollers provided above the conveying part, a supporting frame for supporting the ends of shafts of the compression rollers, a connecting frame for connecting the supporting frame as one, and an upper frame extending upwards from one end of the upper part of the connecting frame; a curl-shaping part having a lower mould formed with a curl-shaping recess where the paperboard is taken in, and an upper mould which is joined corresponding to the upper part of the lower mould; and a natural cooling and shaping part which is provided extending from the curl-shaping recess on the side towards a discharging part such that the curled part of the paperboard that has passed through the curl-shaping recess can be maintained unaltered in the shaped state while being naturally cooled, and which is formed with a curl cooling recess that is formed matched with the curled part such that the curled part can pass through.

IPC Classes  ?

• B31B 1/26 - Folding sheets, blanks, or webs
• B31B 1/64 - Uniting opposed surfaces or edges; Taping by applying heat or pressure
• B31B 1/02 - Feeding or positioning sheets, blanks, or webs
• B65D 5/00 - Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper