PACKAGING AND FILLING DEVICE, PAPER CONTAINER AND BLANK

摘要

A packaging and filling device, a paper container, and a blank is disclosed, in which the container is substantially protected from permeation leakage from an end surface. The blank for the paper container comprises an upper part, a bottom part, and a cylindrical main body having four side walls and a square cross-section, and is formed by a packaging and filling device. The packaging and filling device comprises a loading unit for retrieving the blank and loading a cylindrical blank, a bottom-part-molding unit for molding the bottom part of the cylindrical blank and obtaining a container, a filling unit for filling the container with a liquid food item from an upper opening, and an upper-part-sealing unit for heat-sealing the upper opening.

主权项

1. A packaging and filling device for forming a paper container, the paper container including a cylindrical body having four sidewalls and a substantially square cross section, a top and a bottom,
wherein the paper container is formed of a blank prepared by cutting a band-shaped packaging material including an outermost thermoplastic layer, a paper layer and an innermost thermoplastic layer, and wherein the blank further includes:
a first bottom panel and a third bottom panel extended from the respective lower sides of a first panel and a third panel, which are one pair of two container sidewalls opposed to each other,a second bottom panel and a fourth bottom panel extended from the respective lower sides of a second panel and a fourth panel, which are the other pair of two container sidewalls opposed to each other, anda plurality of top panels corresponding to the top of the paper containerwherein the third bottom panel has a sixth panel partially extended from the center of the lower side of the third bottom panel, andwherein the sixth panel has a width which is 15-65% of a total length of the lower side of the third bottom panel, and a length configured to delay permeation leakage from the side surface;wherein the bottom of the paper container is formed by:
extending the sixth panel from the lower side of the third bottom panel;bending the second bottom panel and the fourth panel into triangular flaps with the lower side surfaces of the second and the fourth bottom panels faced outward and bending the flaps inward;laying the first bottom panel and the third bottom panel on the outsides of the second bottom panel and the fourth bottom panel with the first bottom panel positioned outside of the third bottom panel, andpressing from the inside and the outside, and heat-sealing; wherein the packaging and filling device comprises:
a loading unit configured to take out a selected blank from a bundle of a plurality of vertically sealed and flattened blanks;a bottom forming unit configured to form the bottom of the cylindrical blank to form the container having the top opening and the bottom;a filling unit configured to fill liquid food through the top opening; anda top sealing unit configured to heat-seal the top opening;wherein the loading unit further includes:
a taking-out unit which takes out the blank;an erecting unit configured to erect the flattened blank into the cylindrical blank; andan infeeder which inserts a mandrel of the bottom forming unit into the cylindrical blank,wherein the bottom forming unit includes a press station, the press station including a triangular emboss which presses the container bottom from the outside and the inside by the forward side surface of the mandrel and a press surface, and is provided on the forward edge surface of the mandrel at a position where the third bottom panel is exposed on the inside surface of the container.