Special receptacle or package – Evacuated
Reexamination Certificate
2001-07-18
2003-08-12
Mohandesi, J. (Department: 3728)
Special receptacle or package
Evacuated
C206S522000, C383S003000, C383S103000
Reexamination Certificate
active
06604634
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a receiving bag, and particularly to a receiving bag having an airtight valve.
BACKGROUND OF THE INVENTION
Currently, vacuum packaging is used to package objects for preventing the object from wetness, or being eaten by borers, etc. For packaging in a vacuum state, vacuum receiving bags are developed. The vacuum. receiving bag has an airtight valve and sealing strips. The related prior arts are:
3. U.S. Pat. No. 5,480,030, “Reusable Evacuable Enclosure for Storage of Clothing and the Like”
4. U.S. Pat. No. 5,931,189, “One Way Valve For Use With Vacuum Attachment”
FIG. 3
shows that before absorbing air by vacuuming, the airtight valve of a receiving bag must be opened, and then an envelope must be taken out. Then, an absorbing tube
14
is inserted into an opening of the valve for absorbing air. At this time, an edge of a soft valve piece
26
will curl upwards. Then, air flows out from a hole
24
a.
After air has been absorbed, the edge of the valve piece
26
will restore to the original position to seal the hole
24
a.
Moreover, a hat
32
presses the peripheral edge of the valve
26
. Then the airtight cover
20
covers the valve so as to have a preferred sealing effect. However, the prior art airtight valve structure has some defects in operation and storage.
4. When the absorbing tube is removed, the hat
32
and the airtight cover
20
must cover the opening immediately. In this short time period, air will flow into the bag from the hole
27
of a piston rod
26
.
5. Although there are several holes
24
a,
the diameters of the holes are small, thus, air absorption rate will be affected.
6. The airtight cover
20
seals the top end of the valve opening
21
, but the airtight effect is not good.
Furthermore, the prior art vacuum bag is designed with a sealing edge, the sealing edge is formed by a male sealing strip and a matched female sealing strip. By the engagement of the male and female sealing strips, the opening the bag is sealed. But in this design, only one tenon and one groove are used, the airtight function is not preferred.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a vacuum receiving bag formed by a bag body, a sealing edge installed at an opening of the bag body and an airtight valve at a selected position of the bag body. When a user presses the plug cover of the airtight valve through an air absorbing tube, the airtight valve will conduct, so that the air in the bag body will be absorbed. On the contrary, after the air absorbing tube is taken away, the airtight valve can close automatically so that air can not flow into the bag. Next, the airtight valve can be used with an air tap, thereby, an operator may operate a pump manually to achieve the object of absorbing air. Moreover, the seal edge at the opening of the bag body is formed by two matched seal strips. By the sealing edge, a preferred air seal effect is achieved. The sealing edge is formed by two long sealing strips on inner walls of the upper and lower bag surface. One sealing strip is installed with two long convex tracks, and another sealing strip is installed with two long concave tracks. Each of the convex tracks is formed by a left hook, a right hook and a middle trench. The two hooks are opened slightly outwards; each of the concave tracks is formed by a left and a right cambered grooves and a middle tenon. The two convex tracks and two concave tracks are engaged by applying a force thereto. The two hooks of the convex tracks are embedded into said grooves of the concave tracks, thereby, the trench exactly receiving the tenon; thus a preferred airtight sealing effect is achieved.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
REFERENCES:
patent: 4841603 (1989-06-01), Ragni
patent: 5240112 (1993-08-01), Newburger
patent: 5332095 (1994-07-01), Wu
patent: 5450963 (1995-09-01), Carson
patent: 5480030 (1996-01-01), Sweeney et al.
patent: 5931189 (1999-08-01), Sweeney et al.
patent: 6059457 (2000-05-01), Sprehe et al.
patent: 6408872 (2002-06-01), Skeens et al.
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