Method of forming a burst-resistant easy-open corner in a...

Details Method of forming a burst-resistant easy-open corner in a... Method of forming a burst-resistant easy-open corner in a...

2006-05-02

2006-05-02

Huynh, Louis K. (Department: 3721)

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

C493S267000, C493S227000, C493S228000, C493S229000, C493S232000, C053S133600, C053S133800, C053S412000

Reexamination Certificate

active

07037250

ABSTRACT:
A method of forming a perforated tear line in a bag to form an easy-open corner portion. The perforation blade includes a base formed to span the corner portion of the bag. The base has a first end adapted to extend to the end edge of the bag proximate a seal line, and a second end adapted to extend to one side edge of the bag. A series of closely spaced perforation teeth are formed with the base, and are adapted to penetrate the first and second walls of the bag to form a corresponding series of perforations at the corner portion of the bag. A starter tooth is formed at the first end of the base, and is adapted to cut a starter nick in a skirt of the bag between the end edge and the proximate seal line. A burst protection gap is formed between the starter tooth and a first of the series of perforation teeth. The burst protection gap is adapted for safely receiving the seal line of the bag to prevent severing the seal line when cutting the perforations.

REFERENCES:
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patent: 5482376 (1996-01-01), Moseley et al.
patent: 5636925 (1997-06-01), Smiley
patent: 5702339 (1997-12-01), Smiley
patent: 6402379 (2002-06-01), Albright

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