Abstract

The invention relates to a sewing machine, comprising a contact area (1) for two superimposed material webs, which have edges and which are to be sewn together by means of the sewing machine, wherein, in order to align the edges of the material webs to each other, there is a bottom guide element (2) under the contact area (1) for the bottom material web and a top guide element (3) for the top material web above the contact area (1), wherein the guide elements (2, 3) are each rotatably mounted about a rotation axis (2.1, 3.1). According to the invention, the rotation axes (2.1, 3.1) of the guide elements (2, 3) are arranged extending perpendicular to the contact area (1).

IPC Classes  ?

• D05B 27/00 - Work-feeding means for sewing machines
• D05B 35/10 - Edge guides

Abstract

The invention relates to an upper thread tensioner, comprising two thread tension disks (1, 2), a spring element (3) for pressing the thread tension disks (1, 2) together and a step motor (4) for setting the distance between the two thread tension disks (1, 2) being provided. According to the invention, the spring element (3) is produced of an elastomer.

IPC Classes  ?

• D05B 47/04 - Automatically-controlled tensioning devices
• D05B 69/10 - Electrical or electromagnetic drives

Abstract

The invention relates to a sewing machine, comprising a drive lever (5) having a first coupling point (1) for a press foot (11), a second coupling point (2) for a slider foot (12), a third coupling point (3) for a deflection lever (13), and a fourth coupling point (4) for a force introduction element (14), wherein the first, second and third coupling points (1, 2, 3) are each arranged at mutually spaced points of the drive lever (5), and wherein the force introduction element (14) comprises a first fastening point (7, 8) connected to the housing (6) of the sewing machine and a second fastening point (7, 8) connected to the fourth coupling point (4). According to the invention, the first fastening point (7) is designed as a joint and the fourth coupling point (4) is arranged on a perpendicular bisector between the first and second coupling points (1, 2).

IPC Classes  ?

• D05B 27/04 - Work-feeding means for sewing machines with feed dogs having horizontal and vertical movements arranged above the workpieces
• D05B 27/24 - Feed-dog lifting and lowering devices
• D05B 29/02 - Presser-control devices

Abstract

The invention relates to a sewing machine, comprising a presser foot (2), which is pivotably supported about a horizontally oriented axis (1) and which interacts with an underneath transport device arranged on a resting area (3) for a material to be sewn, said underneath transport device having two feed dogs (4, 5) movably supported relative to each other for continuously transporting the material in an advancing direction. According to the invention, both feed dogs (4, 5) extend horizontally as viewed in the advancing direction, both in an area before and in an area after the axis (1) of the presser foot (2).

IPC Classes  ?

• D05B 27/02 - Work-feeding means for sewing machines with feed dogs having horizontal and vertical movements