Claims
- 1. A method of producing a low bulk, stitchless pin-type seam in a multi-ply fabric for use with paper making equipment, comprising the steps of:
- (a) providing a length of fabric to be seamed comprising a plurality of longitudinal warp yarns interwoven with at least two ply-forming layers of transverse pick yarns, said layers defining at least front and back plys, said length of fabric being of a length which is longer than the desired seamed fabric length;
- (b) removing preselected pick yarns to create apertures in said fabric and define a fold line which corresponds to the fabric end of one of the sides of the seam to be formed, said fold line further defining adjacent fabric body and fabric overlap regions on said fabric;
- (c) installing a seaming coil through said apertures;
- (d) removing preselected pick yarns from said back ply of said fabric in said fabric body and fabric overlap regions adjacent said coil;
- (e) applying a bead of adhesive along said fold line;
- (f) folding at least a portion of said overlap region at said fold line to overlap said fabric body region to form a seaming edge defined by said coil;
- (g) creating a warp yarn fringe on a portion of said fabric overlap region which is remote to said seam overlap area;
- (h) drawing at least portions of said warp yarn fringe between yarns in said fabric body region to complete a first half of said coil seam; and
- (i) performing at least steps (b) through (h) with respect to a different fabric position whereby a second half of said coil seam is formed to matingly receive said first half to define a pin receiving channel.
- 2. The invention of claim 1 wherein step (b) further comprises the step of removing a preselected number of said pick yarns from each layer of said fabric to create said apertures.
- 3. The invention of claim 1 wherein step (a) comprises removing at least 2 pick yarns from each of said ply-forming layers.
- 4. The invention of claim 1 comprising the additional step of threading a bolt thread between portions of said seaming coil and the back surface of said fabric, before applying the adhesive of step (e).
- 5. The invention of claim 1 wherein a retaining wire is temporarily threaded between portions of said seaming coil and said front ply of said fabric.
- 6. The invention of claim 1 wherein step (d) further comprises removing at least 3 of said pick yarns in each of said fabric body and fabric overlap regions.
- 7. The invention of claim 6 wherein said pick yarns to be removed are those which are most adjacent to said seaming coil within said back ply of said fabric in said fabric body and fabric overlap regions.
- 8. The invention of claim 1 wherein step (d) further comprises removing at least 5 of said pick yarns in each of said fabric body and fabric overlap regions.
- 9. The invention of claim 8 wherein said pick yarns to be removed are those which are most adjacent to said seaming coil within said back ply of said fabric in said fabric body and fabric overlap regions.
- 10. The invention of claim 1 wherein step (c) further comprises the step of threading at least a portion of said seaming coil ends back between the back surface of said fabric and within other portions of said seaming coil.
- 11. The invention of claim 10 comprising the additional step of threading a bolt thread between said back surface of said fabric and portions of the loops of said seaming coil, portions of said bolt thread overlapping at least portions of said seaming coil.
- 12. The invention of claim 1 further comprising the step of stapling said overlapping regions to each other following the performance of step (f).
- 13. The invention of claim 12 wherein said staples are spaced by 2-3 inches across said fabric width.
- 14. The invention of claim 13 wherein said staples are applied between the third and fourth picks away from said fold line.
- 15. The invention of claim 13 wherein said staples are applied between the second and third picks away from said fold line.
- 16. The invention of claim 1 wherein step (g) further comprises the step of tacking the fabric end face down to a work surface prior to creating said warp yarn fringe.
- 17. The invention of claim 1 wherein step (g) further comprises the step of cutting a preselected number of back warp yarns along a preselected transverse axis.
- 18. The invention of claim 17 wherein said step of creating said warp yarn fringe comprises the steps of removing pick yarns in the vicinity where said fringe is to be formed, and unraveling said warp yarns to create said fringe.
- 19. The invention of claim 1 wherein step (h) comprises drawing a plurality of the yarns of said warp yarn fringe along the same path between yarns in said fabric body region.
- 20. The invention of claim 19 wherein step (h) comprises the drawing of at least 2 warp yarn fringe yarns along the same path within said fabric body region.
- 21. The invention of claim 1 comprising the additional step of resin treating at least a portion of said seam to improve at least the dimension stability of said seaming coils.
- 22. The product produced in accordance with the method of claim 1.
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a continuation-in-part of my prior co-pending patent application Ser. No. 100,946, filed Dec. 6, 1979 entitled, "Low Bulk, Pin-Type Seam For Use In Paper Making Equipment Fabrics, Such As Dryer Felts," which application is specifically incorporated by reference as if fully set forth herein.
US Referenced Citations (9)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
100946 |
Dec 1979 |
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