PRE-FOLDED MEDICAL SELF SEALING POUCH WITH A PRESSING MARK
A pre-folded medical self sealing pouch closes accurately with a concave pressing mark formed between two counter rotating cams. A top cam has an annular protrusion mating with an annular recess on the lower cam. The medical self sealing pouch comprises a bag body which is formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and at least one adhesive layer is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body. The folding pressing mark is close to one edge of the adhesive close to the mouth of the bag body so that the adhesive is pasted to the first and second surface layers after the seal lip is folded along the folding pressing mark.
The present invention relates to a sterilized packing material used in medical institutions, especially to a medial self sealing pouch.
BACKGROUND OF THE INVENTIONLarge parts of product in medical institutes are sterilized when packed in single paper plastic package instead of original wrapping cloth. The paper plastic package comprises a transparent plastic film and a medical grade paper; as the paper plastic package has good visibility and strong resistance of bacteria, the validity period of the package is greatly lengthened, and therefore it becomes very popular among the users.
However, ordinary paper plastic bag shall be heat-sealed with a sealing machine after it is packed. In this way, on the one hand, a sealing machine is required; on the other hand, a skilled sealing operator is also required. As a result, it is tedious to use this ordinary paper plastic bag compared with wrapping cloth package. For this reason, a medical self sealing pouch is invented to replace this paper plastic bag.
The medical self sealing pouch provides a seal lip which is similar to an envelope seal to an ordinary paper plastic bag. A dedicated double-faced adhesive tape is pasted to the seal lip. When the bag is used, the release paper on the double-faced adhesive tape shall be removed. And then, fold it to stick one second of the double-faced adhesive tape in width to the surface of the plastic film and stick the remaining double-faced adhesive tape to the surface of the medical grade paper to stick the bag mouth.
However, when this traditional medical self sealing pouch is used, especially when the envelope seal is pasted with a double-faced adhesive tape, there exists a problem of improper folding position and poor firmness after the stickup, which brings a risk of air leakage or bursting due to improper sealing during the sterilization process.
SUMMARY OF THE INVENTIONIn order to solve the existing technical problems, this invention aims at providing a pre-folded medical self sealing pouch with a pressing mark to accurately continuously and effectively seal the bag mouth.
This invention model describes a pre-folded medical self sealing pouch with a pressing mark, which comprises;
a bag body which is formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body; and
a double-faced adhesive tape which is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body;
wherein the surface of the double-faced adhesive tape directing at the first surface layer is provided with a folding pressing mark and the folding pressing mark is close to one edge of the double-faced adhesive tape which is close to the mouth of the bag body so that half part of the double-faced adhesive tape in width is pasted to the first surface layer and other half part of the double-faced adhesive tape in width is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.
In the above mentioned medial self sealing pouch, the distance between the folding pressing mark and the edge of the double-faced adhesive tape is about 2 mm.
In the above mentioned medical self sealing pouch, the first surface layer is a transparent plastic composite film.
In the above mentioned medical self sealing pouch, the second surface layer is medical grade paper.
In the above mentioned medical self sealing pouch, the double-faced adhesive tape comprises a tape body, stickup layers provided on two opposite surfaces of the tape body and release paper covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip.
As the above mentioned technical solution is adopted, a folding pressing mark is provided at a specific position of the double-faced adhesive tape on the seal lip in this invention. In this way, the seal lip provides a positioning function when the seal lip is folded. At the moment when the seal lip is folded along the folding pressing mark, the bag mouth can be accurately sealed with the double-faced adhesive tape as per the specified requirements to make sure that the sealing is continuous and effective. Moreover, the sealing effect is better and firmer so that there are less exploded bags.
In a preferred embodiment, the folding pressing mark forming the pre-folded medical self sealing pouch has an improvement in making the pre-fold impression line (whereby the self sealing pouch is already partially folded) by advancing the self sealing pouch material between the two counter-rotating cam rods. The top rotating cam rod has a protruding annular ring with a circumference protrusion which mates against the second surface layer of the pouch material, squeezing it down into the concavity formed by the annular recess indented into the lower rotating cam rod to form the tiny concave linear depression. That linear pressing mark gives the pre-fold pouch flap sufficient stiffness to stay obliquely upward pivotable along small concave linearly extending pressing market indentation. After the concave pressing mark indentation is formed, formed flap is pushed and lightly pivoted, whereby it has an innate ability to stay partially folded obliquely in a pre-folded configuration.
In an alternate embodiment, instead of a double-faced adhesive tape, the inside portion of the flap is covered with a single surface layer of adhesive, which is then covered with a removable release liner layer. Upon removal of the release liner layer, by peeling the release liner off of the inside surface of the flap, the pre-folded flap is manually or mechanically pivoted from its springy, pre-folded configuration, extending at an angle off of the rear paper layer of the self sealing pouch material, until the flap fully covers the opening of the pouch at the top mouth opening formed by the top of the front transparent pouch and the rear paper back layer of the self sealing pouch. The single adhesive layer extends from the top of the flap down to the bottom portion of the flap adjacent to the pre-folded pressing mark. The pre-folded pressing mark is the small concave indentation in the front facing portion of the rear paper layer and its concave linearly extending indentation provides the springy pivot line of the pre-folded flap.
Preferred embodiments of the present invention will now be described in detail with reference to the drawings.
As shown in drawings 1-4, the present invention, a medical self sealing pouch, comprises:
a bag body formed by first heat-sealing the first surface layer 1 and the second surface layer, wherein the first surface layer 1 is a transparent plastic composite film and the second surface layer 2 is medical grade paper, and a seal lip 3 is provided on the second surface layer 2, extending outwards from the mouth of the bag body; and
a double-faced adhesive tape 4 is provided on the surface of the seal lip 3 directing at the first surface layer 1, separated with the mouth of the bag body; the double-faced adhesive tape 4 further comprises: a tape body 41, stickup layers (not shown in the figures) provided on two opposite surfaces of the tape body and release paper 42 covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip 3.
In this invention, a folding pressing mark 5 is provided on the surface of the double-faced adhesive tape 4 directing at the first surface layer 1 (the folding pressing mark 5 pre-folds the seal lip 3). Moreover, the folding pressing mark is close to one edge of the double-faced adhesive tape which is adjacent to the mouth of bag body (in the present embodiment, the distance between the folding pressing mark 5 and the edge of the double-faced adhesive tape 4 is 2 mm) so that half part of the double-faced adhesive tape 4 in width is pasted to the first surface layer 1 and other half part of the double-faced adhesive tape in width is pasted to the second surface layer 2 after the seal lip 3 is folded along the folding pressing mark 5 (as shown in
When this invention is sealed, the pouch is pre-folded along the seal lip 3 along the folding pressing mark and then removed from the release paper 42 of the double-faced adhesive tape 4, and finally pressed into the seal lip 3 on the bag body tightly. As the position of the folding pressing mark 5 is specified and at least part 6 of the double-faced adhesive tape 4 is folded, the bag mouth can be correctly sealed as per the specified requirements with the double-faced adhesive tape 4 on the seal lip 3 and the stickiness is increased.
As shown in
As shown in
Also in the alternate embodiment of
The alternate embodiments of
As shown in drawings 6-8, in the alternate embodiment, the medical self sealing pouch comprises:
a bag body formed by heat-sealing the first surface layer and the second surface layer, wherein the first surface layer 1 is a transparent plastic composite film and the second surface layer 2 is medical grade paper, and a seal lip flap 24 is provided on the second surface layer 2, extending outwards form the mouth of the bag body; and
a single adhesive layer 27 is provided on the surface of the seal lip flap 24 directing at the first layer 1, separated with the mouth of the bag body; the single adhesive layer 27 further comprises a release liner 22 provided on one surface of the seal lip flap 24covering the adhesive layer 27.
In this alternate embodiment of
When this pouch of
It is further noted that in the above mentioned medical self sealing pouch, the first surface layer is a transparent plastic composite film, known to those skilled in the art of sterile medical pouches.
It is further noted that in the above mentioned medical self sealing pouch, the second surface layer is medical grade paper, or a medical grade combination of paper pulp and plastic fibers, as known to those skilled in the art of sterile medical pouches.
In conclusion, the invention has the following advantages:
(1) The seal is smooth and beautiful; the sealing appearance will not be affected as the sealing position is inappropriate due to improper folding position;
(2) The sealing position is specified, safe and reliable. As part of the double-faced adhesive tape is also folded, the firmness of the seal is therefore enhanced; there will be no risk of air leakage or exploded bag due to improper sealing during the sterilization process;
(3) The bag mouth can be sealed more conveniently and quickly: the bag mouth can be sealed easily by removing the anti-adhesive tape on the double-faced adhesive tape and fold it along the folding pressing mark.
(4) In the alternate embodiment where a single adhesive layer is used, the sealing position is also reliable, because of the accurate formation of the linear concave pressing mark indentation, about which the lip flap pivots, between the counter rotating upper rod cam with a circumferential annular protrusion pushing down the pouch sealing material into the annular recess of the counter rotating lower rod cam,
To sum up, as a preferred unbodiment of this invention, it is not aimed to restrict the scope of this invention. There might be many variations from the above mentioned embodiment of the invention. Any simple and equivalent change and modification as per the claims and content of the description of this invention all fall to the protection scope for the claims of the invention. Content that is not described in detail in this invention is conventional technology.
Claims
1. A medical self sealing pouch, comprising:
- a bag body formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body;
- and a double-faced adhesive tape which is provided on the surface of the seal lip directing at the first surface layer, separated with the mouth of the bag body;
- wherein the surface of the double-faced adhesive tape directing at the first surface layer is provided with a folding pressing mark and the folding pressing mark is close to one edge of the double-faced adhesive tape which is adjacent to the mouth of the bag body so that half part of the double-faced adhesive tape in width is pasted to the first surface layer and the other half part of the double-faced adhesive tape in width is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.
2. The medical self sealing pouch according to claim 1, wherein the distance between the folding pressing mark and the edge of the double-faced adhesive tape is about 2 mm.
3. The medical self sealing pouch according to claim 1, wherein the first surface layer is made of a transparent plastic composite film.
4. The medical self sealing pouch according to claim 1 or 3, wherein the second surface layer is made of medical grade paper.
5. The medical self sealing pouch according to claim 1, wherein the double-faced adhesive tape comprises a tape body, stickup layers provided on two opposite surfaces of the tape body and release paper covering on one of the stickup layer, wherein another stickup layer is pasted on the seal lip.
6. The medical self sealing pouch as in claim 1, wherein said pre-fold pressing mark is a concave linearly extending indentation formed by inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess.
7. A medical self sealing pouch, comprising:
- a bag body formed by heat-sealing a first surface layer and a second surface layer, wherein a seal lip on the second surface layer extends outwards from the bag mouth of the bag body;
- and a single adhesive layer which is provided on the surface of the seal lip flap directing at the first surface layer, separated with the mouth of the bag body;
- wherein the first surface layer is provided with a folding pressing mark and the folding pressing mark is adjacent to one edge of the single adhesive layer which is adjacent to the mouth of the bag body so that half part of the single adhesive layer in width is pasted to the first surface layer and the other half part of the single adhesive layer is pasted to the second surface layer after the seal lip is folded along the folding pressing mark.
8. The medical self sealing pouch according to claim 7, wherein the first surface layer is made of a transparent plastic composite film.
9. The medical self sealing pouch according to claim 8, wherein the second surface layer is made of medical grade paper.
10. The medical self sealing pouch according to claim 7, wherein that the single adhesive tape comprises a tape body, a stickup layers provided on a surface of the tape body and a release paper liner covering on one inside surface of the seal lip flap.
11. The medical self sealing pouch as in claim 7, wherein said pre-fold pressing mark is a concave linearly extending indentation formed by inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess..
12. A method of making a pre-fold medical self sealing pouch with a pre-fold closure end, comprising the steps of:
- making a bag body formed by heat-sealing a first surface layer of a transparent plastic composite film and a second surface layer of medical grade paper,
- providing a seal lip on said second surface layer, said seal lip extending outwards from the bag mouth of the bag body;
- providing at least one adhesive layer on the surface of the seal lip flap directing at the first surface layer, separated with the mouth of the bag body;
- providing a folding pressing mark on the second surface layer adjacent to one edge of the single adhesive layer, which is adjacent to the mouth of the bag body so that half part of the single adhesive layer in width is pasted to the first surface layer and the other half part of the single adhesive layer is pasted to the second surface layer after the seal lip is folded along the folding pressing mark;
- wherein said pre-fold pressing mark is a concave linearly extending indentation formed by the steps of inserting the self sealing pouch material between a pair of counter rotating cams, wherein a top cam has a rotating part extension with a circumferential protrusion pressing against said second layer of said self sealing pouch material and into the counter-rotating lower cam having an annular recess to form said concave folding pressing mark.
13. The method as in claim 12 further comprising the step of providing a second adhesive layer opposite to the first adhesive layer, and contacting said first adhesive layer with said second adhesive layer, when said seal lip closes to seal said pre-fold closure end of said pre-fold self sealing pouch.
14. A pre-fold medical self sealing pouch formed by the process of the claim 12.
Type: Application
Filed: Feb 22, 2017
Publication Date: Dec 7, 2017
Inventor: Longfu Song (Shanghai)
Application Number: 15/439,802