Easy-to-open synthetic resin bag and apparatus for the manufacture thereof

DETAILED DESCRIPTION In a conventional bag having a bag body constituted by placing two laminated films formed by laminating together several layers of synthetic resin film over each other and heat-sealing the peripheral edges thereof, when part of the bag body is opened in order to remove the contents, since the bag body is constituted by laminated films, the bag body is difficult to tear and hence the opening process is difficult.
The present invention relates to an easy-to-open synthetic resin bag comprising: a bag body constituted by a laminated film formed by laminating synthetic resin films; a tear string bonded to part of the inner surface of the bag body corresponding to the opening thereof; and a tab formed over an end of the tear string, whereby pulling the tear string by the tab enables the side surface to which the tear string is bonded to be easily and surely torn, thereby allowing the bag body to be easily and speedily opened.
The invention also pertains to a bag-manufacturing apparatus capable of continuously bonding the tear string with tabs provided at the ends thereof to the inner surfaces of the bag bodies in the bag body manufacturing process.