Alignment device for a sewing machine
AssigneeUnion Special Corporation
InventorGunter Rohr
Life of this patent
Estimating the term…
Abstract
An alignment device for the automatic adjustment of the edge of a tubular workpiece to be sewn on a sewing machine having, a presser foot, a feed dog operating on the presser foot, a sensing device for detecting the edge of the workpiece, and a guide member disposed on a side of the feed dog. The alignment device has a device for rotatably driving the guide member, and a device responsive to the sensing device for controlling the equatorial or peripheral speed of the guide member relative to the sewing speed of the sewing machine.
Claims7
An alignment device for the automatic alignment of the edge of a tubular workpiece to be sewn on a sewing machine, having at least one feed dog operating against a presser foot, comprising a sensing device for detecting the edge of the workpiece and only one rotatably driven workpiece guide member which is disposed to the side of the feed dog and whose equatorial or peripheral speed relative to the sewing speed is controlled by the sensing device, in which the guide member acts laterally on the side of the workpiece facing the feed dog and is secured at its axis of rotation to the sewing machine housing.
An alignment device for the automatic alignment of the edge of a tubular workpiece to be sewn on a sewing machine, comprising:
- a presser foot;
- a feed dog operating on the presser foot;
- a sensing device for detecting the edge of the workpiece;
- a guide member disposed on a side of the feed dog;
- means for rotatably driving the guide member;
- and
- means responsive to the sensing device for controlling the equatorial or peripheral speed of the guide member relative to the sewing speed of the sewing machine, wherein the guide member acts on a side of the workpiece facing the feed dog and causes lateral alignment of the workpiece solely by the equatorial speed of the guide member, and including means for securing the guide member about its axis of rotation to a housing of the sewing machine.
Dependencies are inferred from the claim text.