US3653347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic apparatus for sewing a seam of a predetermined configuration
Assignee: Necchi SpA
•
Filing: 1970-07-16
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Granted: 1972-04-04
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Expires: 1990-07-16
Abstract
Abstract A sewing machine including means for automatically sewing a seam of a particular configuration. Fabric clamp means are guided past the sewing needle by a guide means which simultaneously imparts a rectilinear and a rotative motion to the clamp means.
Inventors
- 👤 Nereo Bianchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:38
CPC Classifications
D; D05; D05B; D05B23/00; D05B39/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
Automatic apparatus for producing seams of a given profile comprising: a sewing machine having a sewing needle, a needle plate having an opening therein, a carriage slidable on rectilinear guides, a fabric-holding clamp mounted on said carriage and actuating means for same, means for guiding said clamp below the needle of said sewing machine in accordance with a pre-determined law of motion, characterized by the fact that the said actuating means comprises a driving cylinder and piston which actuates said carriage along said guides, said clamp having a groove of the shape of the seam to be made, a boss fastened on the base of the sewing machine and engaged with said groove at said opening of the needle plate, means pivotally connecting said clamp at its one end to a point of said carriage, the resultant motion of the clamp during the operation of the apparatus being thus composed of a linear translation and a rotation around a point thereof.
Claim 2
Dependent Claim
161 words
Automatic apparatus for producing seams of a given profile comprising: a sewing machine having a sewing needle, a needle plate having an opening therein, a carriage slidable on rectilinear guides, a fabric-holding clamp mounted on said carriage and actuating means for same, means for guiding said clamp below the needle of said sewing machine in accordance with a pre-determined law of motion, characterized by the fact that the said actuating means comprises a driving cylinder and piston which actuates said carriage along said guides, said clamp having a groove of the shape of the seam to be made, a boss fastened on the base of the sewing machine and engaged with said groove at said opening of the needle plate, means pivotally connecting said clamp at its one end to a point of said carriage, the resultant motion of the clamp during the operation of the apparatus being thus composed of a linear translation and a rotation around a point thereof.
Claim 3
Dependent Claim
57 words
Apparatus according to claim 1, characterized by the fact that the said actuating means comprises a hydropneumatic unit and a movable shaft controlled thereby which is co-operatively engaged with said carriage, composed of a pneumatic actuating cylinder for driving said shaft and a pneumatic oil control cylinder for adjustably controlling the speed of displacement of said shaft.
Claim 4
Dependent Claim
145 words
Apparatus according to claim 1, including means for regulating the movements of said clamp which means comprise valves for controlling the air flow to said pneumatic cylinder and opposing parts carried along by the movement of the carriage only in the end portions of its strokes and further including abutting suitable feelers which actuate the valves at the end points of the darts, said valves being arranged to effect a reversal of motion of the clamp upon the commencement of the sewing of the dart and to effect the reversal of the movement of the clamp and the stopping thereof with a small delay, retarding members located at positions corresponding to the end of the sewing of the dart for effecting said delay, said valveS also being adapted to determine the direction of movement of the next dart in the direction opposite the preceding direction.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |