Welding device for welding plastic strips
AssigneeSarna Kunststoff AG
InventorWolfgang Neidhart
Life of this patent
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Abstract
A welding device is provided for welding plastic strips or the like to one another which includes a mounting frame carrying an upper welding shoe with rollers engageable with an upper strip of plastic as well as a lower welding shoe with rollers engaged against a lower strip to be welded. The upper and lower shoes are rigidly connected by the frame so that the complete welding device is supported exclusively at the welding strips with no requirement for further backing for the strips being welded other than the lower welding shoe.
Claims38
Welding device for the continuous welding together of overlapping edges of plastic strips or the like, said device comprising:
- a mounting frame;
- upper welding shoe means carried by said mounting frame and engageable in one direction with the edge of an upper strip to be welded;
- lower welding shoe means carried by said mounting frame and engageable in the opposite direction with the edge of a lower strip to be welded, said lower welding shoe means serving as a backing for said strips;
- connection means carried by said mounting frame for fixedly connecting said upper and lower welding shoe means, said connection means being configured to extend between said strips at a position upstream of the position of the welding together of said strips, whereby said device can be supported exclusively by the strips being welded and further whereby said device can continuously weld together overlapping edges of said plastic strips, irrespective of the length and width of said plastic strips;
- and
- a heating means carried by said mounting frame for heating the strips to be welded, said heating means being configured to produce a double weld with a weld test channel located therebetween.
Device for welding plastic strips or the like to one another;
- said device comprising:
- a mounting frame;
- upper welding shoe means carried by said mounting frame and engageable with an upper strip to be welded;
- lower welding shoe means carried by said mounting frame and engageable with a lower strip to be welded;
- and a heating means carried by said mounting frame for heating the strips to be welded, wherein said heating means is configured to produce a double weld with a weld test channel located therebetween and further wherein said heating means is wedge-shaped and includes two spaced raised portions separated by a reduced portion, said raised portions heating the strips to be welded and said reduced portion aligning with the weld test channel during welding operations;
- and connection means for connecting said upper and lower welding shoe means, whereby said device can be supported exclusively by the strips being welded without requiring backing for said lower strip other than said lower welding shoe means.
Welding device for the continuous welding together of plastic strips or the like, said device comprising:
- a mounting frame;
- a heating means carried by said mounting frame for the heating of the strips to be welded at a position upstream of the position of the welding together of said strips;
- an upper welding shoe means carried by said mounting frame and engageable with at least one strip to be welded;
- lower welding shoe means carried by said mounting frame and engageable with at least another strip to be welded, said lower welding shoe means serving as an exclusive backing for the strips to be welded during the welding step;
- wherein the heating means has a contact heating element formed in a wedge shape;
- and
- further wherein the welding shoe means are made in the form of roller carriages which are connected with each other via a bent swan-neck shaped arm or the like.
Welding device for the continuous welding together of plastic strips or the like, said device comprising:
- a mounting frame;
- a heating means carried by said mounting frame for the heating of the strips to be welded at a position upstream of the position of the welding together of said strips;
- an upper welding shoe means carried by said mounting frame and engageable with at least one strip to be welded;
- lower welding shoe means carried by said mounting frame and engageable with at least another strip to be welded;
- said lower welding shoe means serving as an exclusive backing for the strips to be welded during the welding step;
- wherein said upper and lower welding shoe means both have welding rollers and are arranged in direct opposition to each other for holding together the heated strips to be welded;
- and
- wherein the heating means is swivelably mounted about an axis transverse to the travel direction of the welding device.
Dependencies are inferred from the claim text.