Flexible bags – With closure – Self-closing type
Reexamination Certificate
2005-04-26
2005-04-26
Merek, Joseph C. (Department: 3727)
Flexible bags
With closure
Self-closing type
C383S101000, C383S103000, C383S109000
Reexamination Certificate
active
06883964
ABSTRACT:
A multiwall paper bag for bulk material, especially particulate or powdered material, has an inner ply of a high performance kraft paper, an intermediate layer or ply of a thin polyethylene secured to the outer surface of the inner ply, and an outer ply of high performance kraft paper that is secured to the intermediate ply. At least one end of the bag is closed during initial formation of the bag. The other end can be left open for filling and subsequent closing, or it can be initially closed and provided with a filling valve. At least the intermediate ply, and preferably the inner ply as well, is microperforated for venting of air during filling. The intermediate ply is secured to the inner ply either by a plurality of longitudinally extending transversely space apart lines of adhesive or the securing adhesive is spread completely over the mating surfaces of the two plies.
REFERENCES:
patent: 1752370 (1930-04-01), Cornell
patent: 2593328 (1952-04-01), Meaker
patent: 3085608 (1963-04-01), Mathues
patent: 3784085 (1974-01-01), Kilgore
patent: 3989182 (1976-11-01), Stearley
patent: 4008850 (1977-02-01), Goodrich
patent: 4382538 (1983-05-01), Wilharm
patent: 4470153 (1984-09-01), Kenan
patent: 5405561 (1995-04-01), Dais et al.
patent: 5493844 (1996-02-01), Combrink
patent: 5988881 (1999-11-01), Sutherland
patent: 6375603 (2002-04-01), Yuasa et al.
patent: 454045 (1949-01-01), None
Hodgson & Russ LLP
Hood Packaging Corporation/Emballage Hood Corporation
Merek Joseph C.
LandOfFree
Multiwall paper bag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiwall paper bag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwall paper bag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3414252