CA1103214A - Plastic bag for receiving blood - Google Patents
Plastic bag for receiving bloodInfo
- Publication number
- CA1103214A CA1103214A CA330,514A CA330514A CA1103214A CA 1103214 A CA1103214 A CA 1103214A CA 330514 A CA330514 A CA 330514A CA 1103214 A CA1103214 A CA 1103214A
- Authority
- CA
- Canada
- Prior art keywords
- bag
- top portion
- aperture
- heat sealed
- edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/06—Handles
- B65D33/08—Hand holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A bag that is suitable for receiving blood from animals being exsanguinated is made by folding a sheet of liquid impermeable thermoplastic film back upon itself and folding down the top edges to form a top portion four sheet layers thick. An aperture is cut out of the top portion using a hot die which fuses the four layers together at the perimeter of the aperture. The handle provided by the aperture is strong enough to support the bag when filled with blood, and it also partially closes the bag to reduce the potential for contamination and spillage.
A bag that is suitable for receiving blood from animals being exsanguinated is made by folding a sheet of liquid impermeable thermoplastic film back upon itself and folding down the top edges to form a top portion four sheet layers thick. An aperture is cut out of the top portion using a hot die which fuses the four layers together at the perimeter of the aperture. The handle provided by the aperture is strong enough to support the bag when filled with blood, and it also partially closes the bag to reduce the potential for contamination and spillage.
Description
~ ~ ~ h ~
This invention relates to a plastic bag specially suitable for receiving blood from animals being exsanguinated.
The bag comprises a sheet of water impermeable thermoplastic film folded back upon itself to form front and back panels having a common seamle,ss bottom, two marginal edges, and two top edges. The top edges are folded down to define a top portion. An aperture suitable for gripping the bag is formed in the top portion by means of a hot die, which heat seals the layers of the top portion together at the perimeter of the aperture. The marginal edges are also heat sealed together. The top portion defines a mouth which is open except for the closure effected by the heat sealed perimeter of the grip aperture.
The invention has generally been described and will now be referred to more specifically by reference to the accompanying drawings, illustrating a preferred embodi ment, and in which:
Figure 1 is a front view of the bag of this invention.
Figure 2 is a sectional view ~f the bag of Figure 1 taken along line 2-2.
Figure 3 is a sectional view of the bag of Figure 1 taken along line 3-3.
The bag has a front panel 10 and a back panel 12 having a common seamless bottom 14. The top edges 16, 18 of the panels are folded down to define a top portion 20. An aperture 22 is made by cutting out part of the top portion 20 with a hot die. The temperature of the die is such that, as it cuts through the top portion 20, it heat seals the layers of the top portion 20 together at the perimeter 24 of ,' ~
-~3~
the aperture 22. The top edges 16r 18 are shown as folded to the inside, but they could just as well be folded to the outside.
To improve the strength of the bag, the number of layers comprising the top portion 20 can be increased from four to five by inserting a reinforcing strip of film in the fold of the front panel 10. Alternatively, instead of inserting the strip of film, the number of layers of the top portion 20 can be increased from four to five by increasing the length of the front panel 10 by the height of the top ; portion 20 and creating another fold so that the top edge 16 extends to the top of the bag, with the result that the section of the front panel 10 forming the top portion 20 is three layers thick. To further improve the strength of the ~ ;
bag, the number of layers can be increased to six by doing the same with respect to the back panel 12.
The front panel 10 and back panel 12 are joined together at marginal edge 26 and marginal edge 28 by heat seals.
The front panel 10 is heat sealed to itself along a band 30 which is generally parallel to top edge 16 and which extends across the aperture 22 near the lower section of the perimeter 24. The back panel 12 is similarly heat sealed to itself. The width of the heat seal band 30 and the corresponding heat seal band on the back panel is pre-ferably between one-quarter and three-quarters of an inch.
; The bag is specially suitable for receiving blood from animals being exsanguinated. Blood is drained into the ;:
~ ,. .
~Q3~4 bag through a tube inserted in the opening between aperture 22 and either marginal edge 26 or marginal edge 2g. As the bag receives the bloodl it is suspended from a support passing through the aperture 22. An important feature of the bag is that when it is filled -to capacity with blood, it may be suspended and carried solely by the handle provided by the aperture 20 without spillage. The top portion 20 of the bag provides adequate support and stability, and the partial closure effected by the perimeter 24 of the aperture 22 reduces the potential for contamination of the blood.
Typical dimensions of a polyethylene bag used for this purpose are width 18 inches, height 20 inchès, and nominal aperture dimensions 1.25 by 3.25 inches. The thickness of the film is preferably 3 mils when the top portion has five or more layers, and is more than 3 mils, up to about 4.5 mils, when the top portion is only four layers thick.
` '
This invention relates to a plastic bag specially suitable for receiving blood from animals being exsanguinated.
The bag comprises a sheet of water impermeable thermoplastic film folded back upon itself to form front and back panels having a common seamle,ss bottom, two marginal edges, and two top edges. The top edges are folded down to define a top portion. An aperture suitable for gripping the bag is formed in the top portion by means of a hot die, which heat seals the layers of the top portion together at the perimeter of the aperture. The marginal edges are also heat sealed together. The top portion defines a mouth which is open except for the closure effected by the heat sealed perimeter of the grip aperture.
The invention has generally been described and will now be referred to more specifically by reference to the accompanying drawings, illustrating a preferred embodi ment, and in which:
Figure 1 is a front view of the bag of this invention.
Figure 2 is a sectional view ~f the bag of Figure 1 taken along line 2-2.
Figure 3 is a sectional view of the bag of Figure 1 taken along line 3-3.
The bag has a front panel 10 and a back panel 12 having a common seamless bottom 14. The top edges 16, 18 of the panels are folded down to define a top portion 20. An aperture 22 is made by cutting out part of the top portion 20 with a hot die. The temperature of the die is such that, as it cuts through the top portion 20, it heat seals the layers of the top portion 20 together at the perimeter 24 of ,' ~
-~3~
the aperture 22. The top edges 16r 18 are shown as folded to the inside, but they could just as well be folded to the outside.
To improve the strength of the bag, the number of layers comprising the top portion 20 can be increased from four to five by inserting a reinforcing strip of film in the fold of the front panel 10. Alternatively, instead of inserting the strip of film, the number of layers of the top portion 20 can be increased from four to five by increasing the length of the front panel 10 by the height of the top ; portion 20 and creating another fold so that the top edge 16 extends to the top of the bag, with the result that the section of the front panel 10 forming the top portion 20 is three layers thick. To further improve the strength of the ~ ;
bag, the number of layers can be increased to six by doing the same with respect to the back panel 12.
The front panel 10 and back panel 12 are joined together at marginal edge 26 and marginal edge 28 by heat seals.
The front panel 10 is heat sealed to itself along a band 30 which is generally parallel to top edge 16 and which extends across the aperture 22 near the lower section of the perimeter 24. The back panel 12 is similarly heat sealed to itself. The width of the heat seal band 30 and the corresponding heat seal band on the back panel is pre-ferably between one-quarter and three-quarters of an inch.
; The bag is specially suitable for receiving blood from animals being exsanguinated. Blood is drained into the ;:
~ ,. .
~Q3~4 bag through a tube inserted in the opening between aperture 22 and either marginal edge 26 or marginal edge 2g. As the bag receives the bloodl it is suspended from a support passing through the aperture 22. An important feature of the bag is that when it is filled -to capacity with blood, it may be suspended and carried solely by the handle provided by the aperture 20 without spillage. The top portion 20 of the bag provides adequate support and stability, and the partial closure effected by the perimeter 24 of the aperture 22 reduces the potential for contamination of the blood.
Typical dimensions of a polyethylene bag used for this purpose are width 18 inches, height 20 inchès, and nominal aperture dimensions 1.25 by 3.25 inches. The thickness of the film is preferably 3 mils when the top portion has five or more layers, and is more than 3 mils, up to about 4.5 mils, when the top portion is only four layers thick.
` '
Claims (5)
1. A bag comprising a sheet of plastic film folded back upon itself to form front and back panels and a common seamless bottom, two marginal edges, and two top edges, with the top edges being folded down to define a top portion, the top portion having a grip aperture with all layers of the top portion being heat sealed together at the perimeter of the aperture, the marginal edges being heat sealed, and the upper portion defining a mouth open except for the closure effected by the heat sealed perimeter of the grip aperture.
2. The bag of claim 1, wherein the front panel is heat sealed to itself along a band generally parallel to the top edges, and the back panel is heat sealed to itself along a band generally parallel to the top edges.
3. The bag of claim 2 wherein the width of each heat seal band is from one-quarter of an inch to three-quarters of an inch.
4. The bag of claim 2 wherein the top portion includes a strip of reinforcing film present in the fold of at least one of the panels.
5. The bag of claim 2 wherein the section of at least one of the panels forming the top portion is at least three layers thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA330,514A CA1103214A (en) | 1979-06-25 | 1979-06-25 | Plastic bag for receiving blood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA330,514A CA1103214A (en) | 1979-06-25 | 1979-06-25 | Plastic bag for receiving blood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1103214A true CA1103214A (en) | 1981-06-16 |
Family
ID=4114543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA330,514A Expired CA1103214A (en) | 1979-06-25 | 1979-06-25 | Plastic bag for receiving blood |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1103214A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4931033A (en) * | 1989-02-01 | 1990-06-05 | Equitable Bag Co., Inc. | Plastic bag construction |
| JP2020503217A (en) * | 2016-12-30 | 2020-01-30 | デイリー テク，インコーポレイテッド | Storage bag with attached central part |
-
1979
- 1979-06-25 CA CA330,514A patent/CA1103214A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4931033A (en) * | 1989-02-01 | 1990-06-05 | Equitable Bag Co., Inc. | Plastic bag construction |
| JP2020503217A (en) * | 2016-12-30 | 2020-01-30 | デイリー テク，インコーポレイテッド | Storage bag with attached central part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |