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US 9,845,559 B2Granted
Sewing machine
AssigneeJanome Sewing Machine Co., Ltd.
InventorsMikio Koike, Jun Mafune
Life of this patent
Estimating the term…
Abstract
A sewing machine translates a stitchwork frame with which a cloth is fastened along a direction of a plane where the cloth is fastened based on stitchwork data to form a stitchwork pattern. A presser foot located above the cloth has a height changed by an actuator like a stepping motor in accordance with the advancement of a stitchwork formation. Hence, a predetermined clearance between the cloth and the presser foot is maintained.
Claims4
A sewing machine forming a stitchwork pattern on a cloth, the sewing machine comprising:
- a stitchwork data memory storing stitchwork data, the stitchwork data being to form the stitchwork pattern;
- a stitchwork frame fastening the cloth;
- a frame driving mechanism translating the stitchwork frame horizontally along a direction of a plane where the cloth is fastened based on the stitchwork data;
- a presser foot located above the cloth;
- an actuator changing a height of the presser foot in accordance with an advancement of a stitchwork formation, and maintaining a predetermined clearance below the presser foot with the cloth, wherein the actuator changes the height of the presser foot in accordance with a thickness of the stitchwork pattern, the thickness of the stitchwork pattern changing in accordance with the advancement of the stitchwork formation;
- and
- a detecting unit detecting the thickness of the stitchwork pattern within a range overlapping with the presser foot in accordance with the advancement of the stitchwork formation, wherein the detecting unit calculates the thickness of the stitchwork pattern within the range overlapping with the presser foot based on the stitchwork data.
4 more elements
Dependencies are inferred from the claim text.