Flexible bags – Bag having means to facilitate opening it by severing bag... – Including a separate tearing element which is gripped and...
Reexamination Certificate
1999-08-12
2001-04-10
Pascua, Jes F. (Department: 3727)
Flexible bags
Bag having means to facilitate opening it by severing bag...
Including a separate tearing element which is gripped and...
C383S066000, C383S109000, C383S125000
Reexamination Certificate
active
06213644
ABSTRACT:
FIELD OF THE INVENTION
The present invention is generally directed to a multiply bag typically formed of multiple layers of a bag construction material such as strong, pliable paper materials alone or in conjunction with plastic materials. The bag is constructed so as to store a variety of products including dry cement, fertilizers, seed and the like. In accordance with the present invention, the multiply bag is provided with at least one readily accessible tear strip assembly which enables the bag to be easily opened in the longitudinal direction of the bag.
BACKGROUND OF THE INVENTION
Multiply bags for storing a variety of products including cement, fertilizer, seed and the like are known. Such bags are typically made of multiple plies including an inner ply and an outer ply and one or more optional middle plies. The inner ply and the outer ply typically have opposed ends with a non-linear but generally complimentary profile to enable proper formation of the bag including the sealing of the opposed ends. In a typical construction, the multiply bag has a closed end and a sealable open end which is capable of receiving a storable product such as cement, as for example through a sleeve having a product-receiving opening or spout. Once the storable product is inserted into the open end of the bag, the bag is sealed. Access to the storable product contained within the bag is typically performed by ripping one of the ends of the bag or the body of the bag.
At times it is difficult for the user to open the bag by ripping and thus resort may be had to a sharp object such as a knife, the end of a shovel or the like. Opening a bag in this manner often leads to spilling of the stored product, in part due to the pressure applied to the bag and the contents therein by the user. In addition, when a bag is opened in this manner, the stored product will spill over into a relatively large area which can result in time consuming cleanup and loss of product. Still further, the use of sharp instruments such as a knife can lead to serious injury.
It would therefore be an advantage in the art if a multiply bag could be opened with minimum strain and without risk of injury to the user. It would also be beneficial to provide a bag which can be opened in a user friendly manner without loss of product typical of conventional methods of opening a multiply bag. It would be a further advance in the art if a system of opening the bag could be inexpensively adapted to existing multiply bags which is readily accessible to the user.
SUMMARY OF THE INVENTION
The present invention is generally directed to a multiply bag which employs a system for opening a bag in the longitudinal direction thereof which is easy to perform and minimizes the loss of product because little if any pressure is exerted on the bag itself. Methods of manufacturing the multiply bag also constitute a part of the present invention.
In a particular aspect of the present invention there is provided a multiply bag and method of manufacturing the same comprising:
a) at least two layers of a bag construction material which are secured together to form a closed end and a sealable open end for receiving a storable product within the bag, said at least two layers comprising an inner ply layer and an outer ply layer;
b) said inner and outer ply layers having opposed ends, the opposed ends having a profile enabling the opposed ends of the inner and outer plies to be secured to form said closed end and sealable open ends of the bag;
c) one of said opposed ends of the inner ply layer having a projection and the other of said opposed ends having a notch aligned with said projection; and
d) at least one tearable strip of material extending from the projection to the notch, said strip being accessible so that when the bag is filled with said product the projection having a portion of the tearable strip attached thereto may be pulled thereby opening the bag from the projection to the notch.
REFERENCES:
patent: 2998911 (1961-09-01), Hahn et al.
patent: 3090541 (1963-05-01), Janda
patent: 3291377 (1966-12-01), Eggen
patent: 3515336 (1970-06-01), Kobza
patent: 3554437 (1971-01-01), Kimsey
patent: 3566752 (1971-03-01), Dreher
patent: 4480752 (1984-11-01), Jacobs
patent: 139692 (1934-12-01), None
patent: 610580 (1960-12-01), None
patent: 1292332 (1962-03-01), None
patent: 701731 (1953-12-01), None
Allen John R.
Henderson Tony
Oliphant Steven G.
International Paper Company
Pascua Jes F.
Watov & Kipnes P.C.
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