Method for forming fabric tubes
AssigneeMidwestco, Inc.
InventorsJames D. Moyer, Robert S. Hoffert
Life of this patent
Estimating the term…
Abstract
A web of fabric material is fed flat along a substantially horizontal table. The web is continuous and is marked and then partly cut just short of its edges while in the feeding plane. The edges of the web are then gripped, moved together, and overlapped as the web is moving, and the edges are sewn. A moving gripper pulls the web through the apparatus to an off the arm sewing machine, and a puller roll downstream of the sewing machine assists pulling of the web and maintains the seam tensioned during sewing.
Claims12
A method of forming a tubular fabric bag with ends square to the length of the bag comprising:
- feeding a flat sheet of fabric material along a predetermined path of travel,
- stopping the feeding of said sheet and cutting said sheet across a substantial portion of its width along a line that is spaced inwardly of each edge of the sheet,
- resuming feeding of the sheet along said path, then folding the edges of the sheet into a seam with the cut line precisely aligned on opposite sides of the seam so that the bag after its seam is sewn can be separated by snipping through the seam as well as any uncut material adjacent the seam to provide a bag with precisely square ends, and sewing the seam.
A method of automatically forming a fabric filter bag tube comprising:
- feeding a flat sheet of fabric material along a predetermined path;
- frictionally gripping the sheet adjacent each side edge;
- bringing said edges together while the sheet is moving;
- overlapping said edges;
- and
- stitching through said overalpped edges to form a sewn seam.
Dependencies are inferred from the claim text.