Topic
Feed dogs
About: Feed dogs is a research topic. Over the lifetime, 443 publications have been published within this topic receiving 2181 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
23 Mar 1998
TL;DR: In this paper, a sewing system which can properly arrange stitch loops in a sewn section by automatically stitching knitted pieces with each other without requiring the exchange of a main sewing machine body in accordance with the coarseness and fineness of the stitches and is also suitable for stitching a knitted piece with a fabric.
Abstract: A sewing system which can properly arrange stitch loops in a sewn section by automatically stitching knitted pieces with each other without requiring the exchange of a main sewing machine body in accordance with the coarseness and fineness of the stitches and is also suitable for stitching a knitted piece with a fabric. The sewing system (10) is provided with the main sewing machine body (14) equipped with a setting table (15) for fixing objects (21a and 21b) to be sewn, a sewing needle (18), a sewing machine bed (12), and a first servo motor (29) which moves the needle (18) upward and downward, an X-Y table (44) equipped with first and second servo motors (45c and 46c) for moving the main body (14) forward and backward in the X-Y direction, a CCD camera (22) which fetches the picture data on the surface of the object (21b), a memory (56) which stores the picture data of the pattern of marks arranged on the surface of the object (21b), and a controller (55) which calculates the coordinates of stitches ( alpha ) to be sewn and the needle (18) by comparing both picture data and commands the main body (14) to sew the stitches ( alpha ) by moving the main body (14).
61 citations
Patent•
3 Jul 1981
TL;DR: In this paper, a semiautomatic sewing system consisting of a sewing machine, a drive unit, and a variable speed motor and encoder for counting stitches is used to determine seam lengths and end points.
Abstract: A semiautomatic sewing system (10) comprises a sewing machine (12), a drive unit (42) including a variable speed motor and encoder for counting stitches sewn, material edge sensors (40) mounted in spaced relationship in front of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the sewing machine controls. Accurate control of seam lengths and end points is achieved by initiating countdown of a variable preprogrammed number of final stitches responsive to material edges detected by the sensors (40) only when the stitch count falls within a predetermined window of values so that inaccuracies from stitch counting are limited to a small portion of the overall seam length. If the sensors (40) do not detect a material edge within the window of stitch values, the sewing system (10) reverts to pure stitch counting to determine seam length.
39 citations
Patent•
15 May 2007
TL;DR: In this article, an individual motor is provided for each of a plurality of machine heads for individually driving respective mechanical components, such as a needle bar driving mechanism, thread take-up lever and presser foot mechanism.
Abstract: Individual motors in a sewing machine of the invention are provided, for each of a plurality of machine heads, for individually driving respective mechanical components, such as a needle bar driving mechanism, thread take-up lever and presser foot mechanism. A plurality of rotary hooks are driven by a common motor. Even in a case where embroidering workpieces set on the individual machine heads differ in material between the heads and upper threads used for the machine heads differ in characteristic between the heads, the sewing machine can make, in a concurrent, parallel fashion, embroidery products of different texture suited for the respective materials, characteristics, etc., by setting independent stitch formation per machine head.
32 citations
Patent•
20 May 1982
TL;DR: In this article, an adaptive semiautomatic sewing system (10) comprises a sewing machine (12), a drive unit (42), including a variable speed motor and encoder for counting stitches sewn and for sensing the rotation of the motor, at least one material edge sensor (40) mounted ahead of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the machine controls.
Abstract: An adaptive semiautomatic sewing system (10) comprises a sewing machine (12), a drive unit (42) including a variable speed motor and encoder for counting stitches sewn and for sensing the rotation of the motor, at least one material edge sensor (40) mounted ahead of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the sewing machine controls. The system (10) has manual, teach and auto modes of operation. In the teach mode, control parameters for each seam are stored as the operator sews the initial piece. Accurate control of seam lengths and end points is achieved by initiating countdown of a variable number of final stitches responsive to detection of the material edges by the sensors (40). In dependence upon the amount of the stitch which has been sewn upon edge detection, the reverse lever (17) is moved against stop member (13) in order to reduce the length of the last stitch sewn in order to improve the accuracy of the seam end point.
29 citations
Patent•
10 Apr 1990
TL;DR: In this article, the quilting machine comprises a supporting frame with vertical uprights (3-6) which support, at the top, two horizontal parallel guides (15,16) and a truck (2) which bears the sewing devices (25,26) is slidably suspended on the guides.
Abstract: The quilting machine comprises a supporting frame (1) with vertical uprights (3-6) which support, at the top, two horizontal parallel guides (15,16). A truck (2) which bears the sewing devices (25,26) is slidably suspended on the guides. The truck (2) is composed of two side plates (17,18) connected to one another by two beams (19,20) which extend above and respectively below the plane of the cloth-holder frame (12) and act as a guide for the sewing head (25) of the sewing devices and for the "crochet" device (26).
27 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2019 | 4 |
| 2018 | 1 |
| 2017 | 1 |
| 2016 | 4 |
| 2015 | 3 |