Sewing machine
AssigneeJuki Corporation
InventorsAtsushi Shiraishi, Daishi Kuramashi
Life of this patent
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Abstract
A sewing machine includes an upper feed mechanism, a presser foot mechanism and a control device. The upper feed mechanism feeds a workpiece on a throat plate from above by an upper feed dog. The presser foot mechanism includes a presser foot for pressing the workpiece on the throat plate from above. The control device controls a driving source of the presser foot mechanism. The upper feed mechanism supports the upper feed dog to be vertically movable between an upper retreat position and a lower feed position. The upper feed mechanism includes a detection unit that detects a downward movement of the upper feed dog from the retreat position. The control device controls the driving source to pull the presser foot upward by a detection of the detection unit.
Claims6
A sewing machine comprising:
- an upper feed mechanism configured to feed a workpiece on a throat plate from above by an upper feed dog;
- a presser foot mechanism including a presser foot for pressing the workpiece on the throat plate from above;
- and
- a control device configured to control a driving source of the presser foot mechanism,
- wherein the upper feed mechanism supports the upper feed dog to be vertically movable between an upper retreat position and a lower feed position,
- wherein the upper feed mechanism includes a detection unit configured to detect a downward movement of the upper feed dog from the retreat position, and
- wherein the control device is configured to control the driving source to pull the presser foot upward in response to a detection of the downward movement of the upper feed dog by the detection unit.
Dependencies are inferred from the claim text.