US3784133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seam for woven paper making fabrics
Assignee: Lindsay Wire Weaving Co
•
Filing: 1972-01-19
•
Granted: 1974-01-08
•
Expires: 1992-01-19
Abstract
Abstract A seam for joining opposite ends of a woven fabric to form a loop or belt suitable for various uses in connection with paper making machines. The seam is formed by using weft strands from the woven fabric for seam wefts. Weft strands on each end of the woven fabric are removed to leave warp pickets which are then interwoven with the seam wefts to form the seam, whereby the pattern of the weave across the seam is the same as that in the body of the fabric. The ends of successive warp strands are terminated over different seam wefts in a pattern which includes at least a six-warp sequence. The ends of adjacent warp strands terminate in spaced rows of seam wefts in a repeated sequence with a plurality of seam wefts between adjacent rows. The spacing and direction of the respective warp terminations are such as to achieve suitable seam strength and a reduced tendency to mark the paper sheet formed on the belt.
Inventors
- 👤 J Mcdowell
- 👤 V Hill
- 👤 E Southam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:24
CPC Classifications
B; B21; B21F; B21F33/00; B21F33/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
434 words
In a length of woven fabric having its ends joined by a seam to form a loop, said length of fabric comprising spaced warp strands interwoven with spaced weft strands (hereinafter referred to as woven-wefts) in a selected repeated pattern and said woven wefts being crimped during the weaving of the fabric to have knuckles, in which fabric the warps and woven-Wefts are metal or plastic, the combination wherein: the seam comprises a plurality of seam-wefts which have been removed from the length of fabric after it has been woven and which have been interwoven with warp-ends projecting from each end of the fabric so as to maintain across the seam the same weave pattern as that of the woven fabric, said seam having a first edge portion adjacent one end of the fabric and having a second edge portion adjacent the other end of the fabric, said warp-ends being arranged in a six-warp sequence wherein the ends of the adjacent warp strands terminate in spaced rows of seam-wefts designated as first to sixth row respectively, in a repeated sequence, and there being a plurality of seam-wefts between adjacent rows, both of the warp ends of the first warp strand in each sequence terminating in the first row adjacent one edge portion of the seam, both of the warp ends of the last warp strand in each sequence terminating in the sixth row adjacent the other edge portion of the seam, all of the intermediate warp ends in each sequence terminating in rows two to five, the distance between the warp ends on adjacent warp strands comprising at least two of said rows throughout the sequence, the spacing of the warp ends on adjacent warp strands progressively throughout the sequence being as follows: the warp ends on the second warp strand are spaced two rows from said first row and in the direction of the sixth row, the warp ends on the third warp strand are spaced two rows from the warp ends on the second warp strand and in the direction of the sixth row, the warp ends on the fourth warp strand are spaced three rows from the warp ends on the third warp strand and in the direction of the first row, the warp ends on the fifth warp strand are spaced two rows from the warp ends on the fourth warp strand and in the direction of the sixth row, and the warp ends on the sixth warp strand are spaced two rows from the warp ends on the fifth warp strand and in the direction of the sixth row.
Claim 2
Dependent Claim
434 words
In a length of woven fabric having its ends joined by a seam to form a loop, said length of fabric comprising spaced warp strands interwoven with spaced weft strands (hereinafter referred to as woven-wefts) in a selected repeated pattern and said woven wefts being crimped during the weaving of the fabric to have knuckles, in which fabric the warps and woven-Wefts are metal or plastic, the combination wherein: the seam comprises a plurality of seam-wefts which have been removed from the length of fabric after it has been woven and which have been interwoven with warp-ends projecting from each end of the fabric so as to maintain across the seam the same weave pattern as that of the woven fabric, said seam having a first edge portion adjacent one end of the fabric and having a second edge portion adjacent the other end of the fabric, said warp-ends being arranged in a six-warp sequence wherein the ends of the adjacent warp strands terminate in spaced rows of seam-wefts designated as first to sixth row respectively, in a repeated sequence, and there being a plurality of seam-wefts between adjacent rows, both of the warp ends of the first warp strand in each sequence terminating in the first row adjacent one edge portion of the seam, both of the warp ends of the last warp strand in each sequence terminating in the sixth row adjacent the other edge portion of the seam, all of the intermediate warp ends in each sequence terminating in rows two to five, the distance between the warp ends on adjacent warp strands comprising at least two of said rows throughout the sequence, the spacing of the warp ends on adjacent warp strands progressively throughout the sequence being as follows: the warp ends on the second warp strand are spaced two rows from said first row and in the direction of the sixth row, the warp ends on the third warp strand are spaced two rows from the warp ends on the second warp strand and in the direction of the sixth row, the warp ends on the fourth warp strand are spaced three rows from the warp ends on the third warp strand and in the direction of the first row, the warp ends on the fifth warp strand are spaced two rows from the warp ends on the fourth warp strand and in the direction of the sixth row, and the warp ends on the sixth warp strand are spaced two rows from the warp ends on the fifth warp strand and in the direction of the sixth row.
Claim 3
Dependent Claim
493 words
In a length of woven fabric having its ends joined by a seam to form a loop, said length of fabric comprising spaced warps interwoven with spaced wefts (hereinafter referred to as woven-wefts) in a selected repeated pattern and said woven-wefts being crimped during the weaving of the fabric to have knuckles in which fabric the warps and woven-wefts are metal or plastic, the combination wherein: the seam comprises a plurality of seam-wefts which have been removed from the length of fabric after it has been woven, and which have been interwoven with warp ends projecting from each end of the fabric, so as to maintain across the seam the same weave pattern as that of the woven fabric, said seam having a first edge portion adjacent one end of the fabric and having a second edge portion adjacent the other end of the fabric, said warp ends being arranged in an eight-warp sequence wherein the ends of the adjacent warp strands terminate in spaced rows of seam-wefts designated as first to eighth row respectively in a repeated sequence, and there being a plurality of seam wefts between adjacent rows, both of the warp ends on the first warp strand in each sequence terminating in the first row adjacent one edge portion of the seam, both of the warp ends on the last warp strand in each sequence terminating in the eighth row adjacent the other edge portion of the seam, all of the intermediate warp ends in each sequence terminating in rows two to seven, the distance between the warp ends on adjacent warp strands comprising at least two of said rows throughout the sequence, and the spacing of the warp ends on adjacent warp strands progressively throughout the sequence being as follows: the warp ends on the second warp strand are spaced two rows from said first row and in the direction of the eighth row, the warp ends on the third warp strand are spaced two rows from the Warp ends on the second warp strand and in the direction of the eighth row, the warp ends on the fourth warp strand are spaced two rows from the warp ends on the third warp strand and in the direction of the eighth row, the warp ends on the fifth warp strand are spaced five rows from the warp ends on the fourth warp strand and in the direction of the first row, the warp ends on the sixth warp strand are spaced two rows from the warp ends on the fifth warp strand and in the direction of the eighth row, the warp ends on the seventh warp strand are spaced two rows from the warp ends on the sixth warp strand and in the direction of the eighth row, and the warp ends on the eighth warp strand are spaced two rows from the warp ends on the seventh warp strand and in the direction of the eighth row.
Claim 4
Dependent Claim
493 words
In a length of woven fabric having its ends joined by a seam to form a loop, said length of fabric comprising spaced warps interwoven with spaced wefts (hereinafter referred to as woven-wefts) in a selected repeated pattern and said woven-wefts being crimped during the weaving of the fabric to have knuckles in which fabric the warps and woven-wefts are metal or plastic, the combination wherein: the seam comprises a plurality of seam-wefts which have been removed from the length of fabric after it has been woven, and which have been interwoven with warp ends projecting from each end of the fabric, so as to maintain across the seam the same weave pattern as that of the woven fabric, said seam having a first edge portion adjacent one end of the fabric and having a second edge portion adjacent the other end of the fabric, said warp ends being arranged in an eight-warp sequence wherein the ends of the adjacent warp strands terminate in spaced rows of seam-wefts designated as first to eighth row respectively in a repeated sequence, and there being a plurality of seam wefts between adjacent rows, both of the warp ends on the first warp strand in each sequence terminating in the first row adjacent one edge portion of the seam, both of the warp ends on the last warp strand in each sequence terminating in the eighth row adjacent the other edge portion of the seam, all of the intermediate warp ends in each sequence terminating in rows two to seven, the distance between the warp ends on adjacent warp strands comprising at least two of said rows throughout the sequence, and the spacing of the warp ends on adjacent warp strands progressively throughout the sequence being as follows: the warp ends on the second warp strand are spaced two rows from said first row and in the direction of the eighth row, the warp ends on the third warp strand are spaced two rows from the Warp ends on the second warp strand and in the direction of the eighth row, the warp ends on the fourth warp strand are spaced two rows from the warp ends on the third warp strand and in the direction of the eighth row, the warp ends on the fifth warp strand are spaced five rows from the warp ends on the fourth warp strand and in the direction of the first row, the warp ends on the sixth warp strand are spaced two rows from the warp ends on the fifth warp strand and in the direction of the eighth row, the warp ends on the seventh warp strand are spaced two rows from the warp ends on the sixth warp strand and in the direction of the eighth row, and the warp ends on the eighth warp strand are spaced two rows from the warp ends on the seventh warp strand and in the direction of the eighth row.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |