Fluid handling – Inflatable article
Reexamination Certificate
1998-12-22
2001-06-19
Rivell, John (Department: 3753)
Fluid handling
Inflatable article
C137S846000, C446S224000
Reexamination Certificate
active
06247488
ABSTRACT:
The present invention relates to a non return valve system for air or liquid filled containers designed from flexible plastic or rubber film material and which executes its non return valve function when the container, which for example may be a mattress, a pillow or a package, has been filled with air or liquid, and which valve system comprises an opening channel.
STATE OF THE ART AND PROBLEM
There are many kinds of non return valves on the market. All of them are more or less complicated. In all cases, there are separate units that should be mounted on the containers manually or by means of automatic systems and or requires extra sealing means like plugs, clamps or welding.
The above pointed out quality problems and irrational production methods makes the products considerably more expensive.
SOLUTION AND ADVANTAGES
A first object of the present invention is to provide industrial engineering advantages with lower and more competitive prices and increasing quality for the containers by means of the more simple and more safe non return valve system which is provided.
Said object is achieved according to the present invention, the characteristics of which appears from the accompanying claim
1
, namely that the opening channel is formed between two sections of the film material superimposed one on another, which sections extend from the outside of the container into the same and are joined together right up to the opening channel.
The invention also relates to a method for forming a non return valve system with an opening channel for filling and draining, for an air or liquid filled container such as for example a mattress, a pillow or a package of flexible plastic or rubber film material and which executes its non return valve function when the container has been filled with air/liquid, according to the system.
Said method is substantially characterized in that two sections of the film material are joined together at each side of the opening channel,
that the joined together sections of the film material are folded so that they end up inside the container, and
that the outer edges of the container then are joined together except where the opening channel has been provided.
REFERENCES:
patent: 4674532 (1987-06-01), Koyanagi
patent: 4842007 (1989-06-01), Kurtz
patent: 4917646 (1990-04-01), Kieves
patent: 4983138 (1991-01-01), McGrath
patent: 5209264 (1993-05-01), Koyanagi
patent: 5248275 (1993-09-01), McGrath et al.
patent: 5564143 (1996-10-01), Pekar et al.
patent: 5830780 (1998-11-01), Dennison et al.
patent: 5860441 (1999-01-01), Garcia
patent: 5878768 (1999-03-01), Carrasco
patent: 5934310 (1999-08-01), Littlehorn
Orum & Roth
Rivell John
Schoenfeld Meredith H
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