Prosthesis comprising knitted material layers and method of manufacturing by ultrasonic welding

摘要

The present invention relates to a prosthesis comprising at least two pieces of knitted fabric and to the method of manufacturing it using a sonotrode to perform ultrasonic welding. The prosthesis comprises at least one first piece of knitted fabric and at least one second piece of knitted fabric, which are welded together by means of a plurality of welds situated in a joining region in which at least a portion of the said first and second pieces of knitted fabric are superposed, the said first and second pieces of knitted fabric each comprising a group of yarns extending respectively in first and second directions A and B, characterized in that the said directions A and B are substantially aligned with one another in the said joining region, and each said weld in the joining region is of elongate shape with its longitudinal axis being aligned with the said directions A and B.

主权项

1. A prosthesis comprising at least one first piece of knitted fabric and at least one second piece of knitted fabric, the first and second pieces of knitted fabric welded together by means of a plurality of welds situated in a joining region in which at least a portion of the first piece of knitted fabric and at least a portion of the second piece of knitted fabric are superposed, the first piece of knitted fabric comprising a first group of yarns constituting at least one first pillar stitch weave extending in a first direction A and the second piece of knitted fabric comprising a second group of yarns constituting at least one second pillar stitch weave extending in a second direction B, characterized in that the first and second directions A and B are substantially aligned with one another in the joining region, and each weld in the joining region is of elongate shape with its longitudinal axis aligned with the first and second directions A and B, wherein pillar stitches of the first and second pillar stitch weaves are superposed and at least one pillar stitch of the first pillar stitch weave and at least one pillar stitch of the second pillar stitch weave are welded together in the joining region.