US4315049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stitchless low bulk, pin-type seam for use in paper making equipment fabrics, such as dryer felts
Assignee: Asten Inc
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Filing: 1980-04-28
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Granted: 1982-02-09
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Expires: 2000-04-28
Abstract
Abstract A novel low bulk seam is disclosed for use in paper making machine fabrics, such as dryer felts. The seam is particularly adapted for use with multi-filament yarns which comprise multi-ply fabrics. A novel method for producing this seam is disclosed which comprises the insertion and adhesion of a seaming coil, the removal of picks in adjacent fabric areas, the folding and overlapping of such areas, the creation of a warp fringe, and the pulling of portions of that fringe into and through portions of the fabric body fasteners to create a stitchless seam providing substantially uniform thickness and air permeability across the full fabric width. A durable, reliable, non-marking seam is accordingly provided for use with spun, mono-filament and/or multi-filament fabrics.
Inventors
- 👤 Gisela Fickers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:57
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/0027; D21F1/0054; D21F7/00; D21F7/08; D21F7/10; Y; Y10; Y10T; Y10T24/00; Y10T24/16; Y10T24/1664; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24264; Y10T428/249921; Y10T428/249923
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
281 words
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.
Claim 2
Independent Claim
281 words
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.
Claim 3
Dependent Claim
31 words
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.
Claim 4
Dependent Claim
21 words
The invention of claim 1 wherein step (a) comprises removing at least 2 pick yarns from each of said ply-forming layers.
Claim 5
Dependent Claim
34 words
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).
Claim 6
Dependent Claim
25 words
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.
Claim 7
Dependent Claim
28 words
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.
Claim 8
Dependent Claim
37 words
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.
Claim 9
Dependent Claim
28 words
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.
Claim 10
Dependent Claim
37 words
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.
Claim 11
Dependent Claim
39 words
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.
Claim 12
Dependent Claim
43 words
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.
Claim 13
Dependent Claim
23 words
The invention of claim 1 further comprising the step of stapling said overlapping regions to each other following the performance of step (f).
Claim 14
Dependent Claim
17 words
The invention of claim 12 wherein said staples are spaced by 2-3 inches across said fabric width.
Claim 15
Dependent Claim
21 words
The invention of claim 13 wherein said staples are applied between the third and fourth picks away from said fold line.
Claim 16
Dependent Claim
21 words
The invention of claim 13 wherein said staples are applied between the second and third picks away from said fold line.
Claim 17
Dependent Claim
30 words
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.
Claim 18
Dependent Claim
26 words
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.
Claim 19
Dependent Claim
40 words
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.
Claim 20
Dependent Claim
31 words
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.
Claim 21
Dependent Claim
28 words
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.
Claim 22
Dependent Claim
30 words
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.
Claim 23
Dependent Claim
11 words
The product produced in accordance with the method of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |