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US3570433A
Expired / Lapsed
US
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Method of sewing parallel rows of zig-zag stitches
Assignee: Singer Co
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Filing: 1969-03-26
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Granted: 1971-03-16
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Expires: 1989-03-26
Abstract
Abstract A method of sewing parallel rows of zigzag stitches for the formation of a buttonhole so that each row is formed in a like manner. Each row of zigzag stitches is formed using the same direction of feed. By means of a skip-stitching technique, a line of exceedingly long stitches is formed in the opposite direction of feed within the bight of the zigzag stitches of one row in order to return a work fabric to a common starting point for the formation of the rows. The process may start with a line of stitches formed in the opposite direction of feed in order to position the work fabric at the common starting point so that the rows are uniform, each having zigzag stitches which overlie the line of stitches formed in the opposite direction of feed.
Inventors
- 👤 William Weisz
- 👤 Charles R Odermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:00
CPC Classifications
D; D05; D05B; D05B19/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
286 words
A method of producing a buttonhole on a piece of material by sewing two spaced-apart rows of zigzag stitches, each row having a width less than one half the total width of the two parallel rows side by side, and using a zigzag sewing machine having means for reversing the direction of feed of the material, means to control the width of the zigzag stitches, and means to control the width of the zigzag stitches, and means to provide for skipstitching, the method comprising the sequential steps of: a. sewing a first row of zigzag stitches on the material in a predetermined direction; b. increasing the width of the zigzag stitch to a width equal to the total width of the two parallel rows of stitches side by side; c. sewing one, or any other odd number of zigzag barring stitches; d. operating the means for reversing the direction of feed of the material; e. shifting laterally the zigzag stitching position; f. decreasing the width of the zigzag stitch to a width equal to the width of the first parallel row of zigzag stitches; g. operating said means for skip-stitching while remaining in the zigzag mode to form a row of long zigzag stitches parallel to the first row of zigzag stitches and spaced apart therefrom, and having a length equal to the length of the first row of zigzag stitches; h. operating the means for reversing the direction of feed, thereby returning to the first predetermined direction of feed; and i. sewing a second row of parallel zigzag stitches, to overlie the long zigzag stitches sewn in the row of skip stitches, and equal to the length of the first parallel row of zigzag stitches.
Claim 2
Independent Claim
286 words
A method of producing a buttonhole on a piece of material by sewing two spaced-apart rows of zigzag stitches, each row having a width less than one half the total width of the two parallel rows side by side, and using a zigzag sewing machine having means for reversing the direction of feed of the material, means to control the width of the zigzag stitches, and means to control the width of the zigzag stitches, and means to provide for skipstitching, the method comprising the sequential steps of: a. sewing a first row of zigzag stitches on the material in a predetermined direction; b. increasing the width of the zigzag stitch to a width equal to the total width of the two parallel rows of stitches side by side; c. sewing one, or any other odd number of zigzag barring stitches; d. operating the means for reversing the direction of feed of the material; e. shifting laterally the zigzag stitching position; f. decreasing the width of the zigzag stitch to a width equal to the width of the first parallel row of zigzag stitches; g. operating said means for skip-stitching while remaining in the zigzag mode to form a row of long zigzag stitches parallel to the first row of zigzag stitches and spaced apart therefrom, and having a length equal to the length of the first row of zigzag stitches; h. operating the means for reversing the direction of feed, thereby returning to the first predetermined direction of feed; and i. sewing a second row of parallel zigzag stitches, to overlie the long zigzag stitches sewn in the row of skip stitches, and equal to the length of the first parallel row of zigzag stitches.
Claim 3
Dependent Claim
35 words
The method as recited in claim 1 wherein the length of the skip-stitch row may be increased so that any even number of zigzag barring stitches may be formed above the parallel rows of stitches.
References Cited (Backward Citations)
US1483184A
Cited
US2977913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |