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US 6,951,177 B2Granted
Buttonhole sewing machine
AssigneeDurkopp Adler Aktiengesellschaft
InventorsJochen Fischer, Thomas Nöltge
Life of this patent
Estimating the term…
Abstract
A buttonhole sewing machine comprises a top arm (1) with a needle (6) movable in up and down reciprocation and a base plate (2). A buttonhole cutting device (13) is provided, having a knife (36) which is disposed on the base plate (2) and comprises a straight cutting edge (37) that extends in the y direction and an eye cutting edge (38). A cutting block (15) cooperates with the knife (36). The knife (36) and the cutting block (15) are motor-adjustable one in relation to the other in the y direction.
Claims12
A buttonhole sewing machine, comprising
- a base plate (2), a top arm (1) and a standard (3) uniting the arm (1) and the base plate (2);
- a needle (6) movable in up and down reciprocation;
- at least one work piece clamp (9a, 9b) displaceable in a y direction;
- a buttonhole cutting device (13),
- which is disposed downstream of the work piece clamp (9a, 9b) seem from the needle (6) in the y direction,
- which has a knife (36) that is disposed on the base plate (2), having a straight cutting edge (37) that extends in the y direction and an eye cutting edge (38) on one end,
- a cutting block (15) which cooperates with the knife (36), and
- a cutting drive (16) for displacement of the cutting block (15) in a vertical z direction towards the knife (36);
- characterized
- in that the knife (36) and the cutting block (15) are motor-adjustable one relative to the other in the y direction.
7 more elements
Dependencies are inferred from the claim text.