Patent ID: 7211035
Filing Date: 2007-05-01
Classification: B29C,B29L,B31B,B65D,Y10T

Abstract:
1. A method for manufacturing a reclosable packaging bag, which comprises the steps of: providing at least two sheets of film material, each sheet of film material having opposing upper and lower edges and opposing side edges; placing said at least two sheets of film material one upon another to prepare a non-joined main bag body, wherein said upper and lower opposing edges and said opposing side edges of each sheet of film material have not as yet been joined with any opposing edge; folding upper portions of said at least two sheets of film material so as to separate the upper portions of said at least two sheets of film material to form a first and second bent portions, thereby exposing inner surfaces of said at least two sheets of film material; placing said first and second bent portions in a linear-fastener molding machine; continuously forming a first linear fastening member on the inner surface of one of said first and second bent portions and forming a second linear fastening member on the inner surface of the other of said first and second bent portions of said non-joined main bag body by an insert injection molding, respectively, excluding opposite side edges of each bent portion thereof; and heat-sealing said lower edge and said left-hand and right-hand side edges of said at least two sheets of film material over their entirety to form a joined main bag body.