Abstract: A method of producing a zipper pack includes the steps of: (a) providing a container having a front sheet member and a back sheet member, and a synthetic resin zipper with first and second wings extending substantially asymmetrically from the synthetic zipper; (b) inserting the synthetic resin zipper at a slanted angle to an interior surface of an opening part of the front and back sheet members of the container in such a manner that the substantially asymmetrically extending wings are arranged towards a corner area of the opening part of the container; (c) inserting an adhering prevention member between the first and second wings; (d) thermally adhering the first and second wings to the front and back sheet members of the container while having the adhering prevention member inserted between the first and second wings so as to prevent a thermal adhesion between the first and second wings; and (e) sealing outer edge portions of the front and back sheet members of the container.

Abstract: An improved zipper pack (1) is disclosed, in which wings (23a, 24a) are formed at both sides of each of the female zipper (21) and the male zipper (22), and the wings (23a, 24a) of one side of each of the female (21) and male zippers (22) are separated and formed in the direction of a corner of the zipper pack (1) and are thermally bonded with the inner surface (12, 13) of both sides of the pack (1), and the ends of the wings (23b, 24b) of the other side of each of the female and male zippers (21, 22) which are not thermally bonded with the inner surface 812, 13) of both sides of the pack (1) and are formed in the inner direction of the pack (1), are thermally bonded so that the stuff filled in the zipper pack (1) does not contact with the female and male zippers.

Abstract: The present invention relates to a corner open type zipper pack (1) capable of achieving an automatic fabrication in which an opening part formed of a synthetic resin zipper (2) is formed at a corner of a pack formed of a synthetic resin seat source material. The synthetic resin zipper is thermally adhered only at one side of each of the female zipper and the male zipper with a thermal adhering wing, wherein the female and male zippers are arranged in an inner direction of the zipper pack, and the thermal adhering wing is arranged in a direction of the corner portion of the opening part for thereby achieving a thermal adhering structure, so that an automatic fabrication is obtained.