Patent ID: 9169595
Filing Date: 2015-10-27
Classification: B29C,D06H,Y10T

Abstract:
1. A method of welding a fold at an edge of a piece of fabric with a welding machine, the method comprising: lowering a fabric pre-fold bar so that the fabric pre-fold bar is above the piece of fabric; pushing a portion of the fabric so that the portion of fabric is on top of the pre-fold bar so that the pre-fold bar is between the portion of fabric on top of the fabric pre-fold bar and other fabric below the pre-fold bar, wherein the portion of the fabric on top of the fabric pre-fold bar is folded edge fabric and fabric not on top of the fabric pre-fold bar is not folded edge fabric, and wherein a folded end is formed where the folded edge fabric and the not folded edge fabric are folded; moving the folded edge fabric off of the fabric pre-fold bar; and welding at least some of the folded edge fabric to the not folded edge fabric.