IT1246868B - Bag of thermoplastic material that is easy to produce on a bagging machine and is adapted to be emptied of the air incorporated by the bagged product - Google Patents
Bag of thermoplastic material that is easy to produce on a bagging machine and is adapted to be emptied of the air incorporated by the bagged productInfo
- Publication number
- IT1246868B IT1246868B IT01251790A IT1251790A IT1246868B IT 1246868 B IT1246868 B IT 1246868B IT 01251790 A IT01251790 A IT 01251790A IT 1251790 A IT1251790 A IT 1251790A IT 1246868 B IT1246868 B IT 1246868B
- Authority
- IT
- Italy
- Prior art keywords
- bag
- closed
- perforations
- thermoplastic material
- microperforations
- Prior art date
Links
- 239000012815 thermoplastic material Substances 0.000 title abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000002390 adhesive tape Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
Landscapes
- Basic Packing Technique (AREA)
- Packages (AREA)
Abstract
At least one of the walls of the bag of thermoplastic material is wholly or partly a double wall, i.e. is formed from at least two superimposed sheets A-B. The inner sheet A has microperforations 1 on the part covered by the outer sheet, while the outer sheet B has one or more perforations 2 which are offset from the microperforations below in such a way as to be closed by the inner sheet. After the bag has been filled and closed, it is exposed to an external vacuum of an appropriate degree to remove the air from the bag through the labyrinth formed by the inner microperforations and outer perforations. When the bag leaves the air extractor, its walls collapse around the product and the said perforations 1, 2 are closed by the intimate and mutual contact of the sheets which form the double wall. The outer perforations are preferably then closed by heat- sealing or other methods, for example an adhesive, or else adhesive tapes 6. It is possible to interpose at least one insert acting as a filter between the two sheets of the double wall. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT01251790A IT1246868B (en) | 1990-09-14 | 1990-09-14 | Bag of thermoplastic material that is easy to produce on a bagging machine and is adapted to be emptied of the air incorporated by the bagged product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT01251790A IT1246868B (en) | 1990-09-14 | 1990-09-14 | Bag of thermoplastic material that is easy to produce on a bagging machine and is adapted to be emptied of the air incorporated by the bagged product |
Publications (3)
Publication Number | Publication Date |
---|---|
IT9012517A0 IT9012517A0 (en) | 1990-09-14 |
IT9012517A1 IT9012517A1 (en) | 1992-03-14 |
IT1246868B true IT1246868B (en) | 1994-11-28 |
Family
ID=11141102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT01251790A IT1246868B (en) | 1990-09-14 | 1990-09-14 | Bag of thermoplastic material that is easy to produce on a bagging machine and is adapted to be emptied of the air incorporated by the bagged product |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1246868B (en) |
-
1990
- 1990-09-14 IT IT01251790A patent/IT1246868B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
IT9012517A0 (en) | 1990-09-14 |
IT9012517A1 (en) | 1992-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted |