Method and apparatus for obtaining transverse mutual joining of superimposed continuous webs
Abstract
Abstract The present invention relates to a method and an apparatus for obtaining transverse mutual joining of superimposed continuous webs. The method is mainly characterized in that a thermoplastic web is inserted between two superimposed continuous running webs. All the webs are then subjected to heat and pressure in an area where the actual joining is effected, the additional, thermoplastic web being inserted at a speed lower than the speed of the webs which are to be joined together. The apparatus is basically characterized by feeding means for the webs to be joined together and for the additional thermoplastics web. It is further characterized by means for applying heat and pressure on all the webs in the area where the joining is to be effected. The feeding means for the thermoplastic web have a lower speed than the feeding means for the webs to be united and are arranged, as seen in the direction of movement of the webs, in front of the heat and pressure applying means and at one side edge of the webs in order to feed the additional, thermoplastic web between the superimposed webs and at an angle to said side edge.
Inventors
- 👤 L Andersson
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
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