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| Issue 1299-1 |
| US 6,951,177 B2 |
| Buttonhole sewing machine |
| Jochen Fischer, Detmold (Germany); and Thomas Nöltge, Bielefeld (Germany) |
| Assigned to Dürkopp Adler Aktiengesellschaft, Bielefeld (Germany) |
| Appl. No. 10/510,010 PCT Filed Dec. 19, 2003, PCT No. PCT/EP03/14627 § 371(c)(1), (2), (4) Date Sep. 29, 2004, PCT Pub. No. WO2004/070100, PCT Pub. Date Aug. 19, 2004. |
| Claims priority of application No. 103 04 821 (DE), filed on Feb. 06, 2003. |
| Prior Publication US 2005/0103245 A1, May 19, 2005 |
| Int. Cl.7D05B 3/08 |
| U.S. Cl. 112—68 [112/70] | 12 Claims |
| 1. 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.
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