US3726240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sewing machine
Assignee: Swirl Inc
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Filing: 1971-02-12
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Granted: 1973-04-10
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Expires: 1991-02-12
Abstract
Abstract A sewing machine for producing sash belts is provided with a timer-operated control means which, following manual initiation by an operator, produces an initially slow operation of the machine to allow proper operation of an automatic thread cutter; effects formation of a gap for turning the sash belt at a midpoint between first and second aligned seams; and finally stacks the completed product by means of an air blast.
Inventors
- 👤 W Emich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
D; D05; D05B; D05B23/00; D05D; D05D2207/00; D05D2207/02; D05D2207/04; D05D2305/00; D05D2305/02; D05D2305/04; D05D2305/08; D05D2305/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
A sewing machine having a reciprocating needle, means cooperating with said needle and means for moving two layers of fabric past said needle and said cooperating means, to produce a seam for securing together said two layers of fabric, control means for effecting simultaneous operation of said needle and said cooperating means to produce a first seam, having a predetermined length, thereafter effecting movement of said layers of fabric without stitching by said needle and its cooperating means for producing a gap of predetermined length, and thereafter effecting continued stitching by said needle and cooperating means to produce a seam on the other side of said gap, and tension means for producing a tension in a length of thread approaching the location of the needle, and means responsive to said control means for producing a slack in the thread between said tension means and the location of said needle following the completion of said first seam and prior to the production of said gap.
Claim 2
Dependent Claim
164 words
A sewing machine having a reciprocating needle, means cooperating with said needle and means for moving two layers of fabric past said needle and said cooperating means, to produce a seam for securing together said two layers of fabric, control means for effecting simultaneous operation of said needle and said cooperating means to produce a first seam, having a predetermined length, thereafter effecting movement of said layers of fabric without stitching by said needle and its cooperating means for producing a gap of predetermined length, and thereafter effecting continued stitching by said needle and cooperating means to produce a seam on the other side of said gap, and tension means for producing a tension in a length of thread approaching the location of the needle, and means responsive to said control means for producing a slack in the thread between said tension means and the location of said needle following the completion of said first seam and prior to the production of said gap.
Claim 3
Dependent Claim
162 words
A sewing machine having a reciprocating needle, means cooperating with said needle to produce stitching for securing together two layers of fabric, a presser foot, feeding means normally cooperating with said presser foot to move said layers of fabric past said needle and said cooperating means, timer-operated control means for effecting simultaneous operation of said needle, said means cooperating with said needle and said feeding means for a first predetermined interval to produce a first seam, thereafter discontinuing cooperation between said presser foot and said feeding means for a second predetermined interval to allow said fabric layers to be moved past said needle and Its cooperating means to produce a gap, and thereafter effecting continued simultaneous operations of said needle, said cooperating means and said feeding means to produce a seam on the other side of said gap, and means responsive to said control means for moving said fabric layers past said needle and its cooperating means during the second predetermined interval.
Claim 4
Dependent Claim
162 words
A sewing machine having a reciprocating needle, means cooperating with said needle to produce stitching for securing together two layers of fabric, a presser foot, feeding means normally cooperating with said presser foot to move said layers of fabric past said needle and said cooperating means, timer-operated control means for effecting simultaneous operation of said needle, said means cooperating with said needle and said feeding means for a first predetermined interval to produce a first seam, thereafter discontinuing cooperation between said presser foot and said feeding means for a second predetermined interval to allow said fabric layers to be moved past said needle and Its cooperating means to produce a gap, and thereafter effecting continued simultaneous operations of said needle, said cooperating means and said feeding means to produce a seam on the other side of said gap, and means responsive to said control means for moving said fabric layers past said needle and its cooperating means during the second predetermined interval.
Claim 5
Dependent Claim
89 words
A sewing machine according to claim 2 in which the means responsive to said control means for moving said fabric layers during the second predetermined interval comprises roller means positioned to receive said fabric layers after they pass said feeding means and normally exerting a pressure against the fabric sufficient to take up slack between said feeding means and said roller means but allowing some slippage at said roller means, and means causing said roller means to exert a greater pressure on the fabric during the second predetermined interval.
Claim 6
Dependent Claim
157 words
A sewing machine having a reciprocating needle, means cooperating with said needle to produce stitching for securing together two layers of fabric, a presser foot, feeding means normally cooperating with said presser foot to move said layers of fabric past said needle and said cooperating means, control means for effecting simultaneous operation of said needle, said means cooperating with said needle and said feeding means to produce a first seam having a predetermined length, thereafter discontinuing cooperation between said presser foot and said feeding means to allow said fabric layers to be moved past said needle and its cooperating means to produce a gap of predetermined length, and thereafter effecting continued simultaneous operation of said needle, said cooperating means and said feeding means to produce a seam on the other side of said gap, and means responsive to said control means for moving said fabric layers past said needle and its cooperating means to produce said gap.
Claim 7
Dependent Claim
157 words
A sewing machine having a reciprocating needle, means cooperating with said needle to produce stitching for securing together two layers of fabric, a presser foot, feeding means normally cooperating with said presser foot to move said layers of fabric past said needle and said cooperating means, control means for effecting simultaneous operation of said needle, said means cooperating with said needle and said feeding means to produce a first seam having a predetermined length, thereafter discontinuing cooperation between said presser foot and said feeding means to allow said fabric layers to be moved past said needle and its cooperating means to produce a gap of predetermined length, and thereafter effecting continued simultaneous operation of said needle, said cooperating means and said feeding means to produce a seam on the other side of said gap, and means responsive to said control means for moving said fabric layers past said needle and its cooperating means to produce said gap.
Claim 8
Dependent Claim
85 words
A sewing machine according to claim 4 in which said means responsive to said control means for moving said fabric layers includes roller means positioned to receive said fabric layers after they pass said feeding means and normally exerting a pressure against the fabric sufficient to take up slack between said feeding means and said roller means but allowing some slippage at said roller means, and means causing said roller means to exert a greater pressure on said fabric during the production of the gap.
Claim 9
Dependent Claim
101 words
A sewing machine according to claim 4 including a first motor for operating said reciprocating needle and said means cooperating with said needle, a second motor, roller means positioned to receive said fabric layers after they pass said feeding means and exerting a pressure against said fabric sufficient to take up slace between said feeding means and said roller means, means responsive to said control means connecting said roller means to said first motor for rotation thereby during the production of said seams, and for connecting said roller to said second motor for rotation thereby during the production of said gap.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |