Bernina International Ag

Benina International Ag

Severin Brunner

Gunnar Schlaich

Ioannis Imionidis

Alain Capt

André Stucki

Patric Konner

Marco Bernegger

Niklaus Wacker

Hans Fluckiger

Stephan Spengler

Hans Flückiger

Markus Muller

Roland Beer

Georg Janouschek

Chrisoph Frei

Christoph Frei

Dusan Dunjic

Markus Müller

Patric Könner

A sewing machine having a device for manually changing a feed dog (), including the feed dog () and a feed-dog holder (). The feed-dog holder () is disposed in an arm bed () that is associated with the sewing machine, and the feed dog () is receivable in a clearance () of the feed-dog holder (). The feed dog () that is located in the clearance () has a support face () which may be disposed parallel with the surface of a sewn-product support which may contain a needle-hole plate () or be configured as a needle-hole plate (), the sewn-product support and/or the needle-hole plate () may at least partially be formed by the surface of the arm bed (), and the support face () may be received in an opening () of the needle-hole plate (). The feed dog () is fastenable in the clearance by a fastening element () or of a setting element () such that the support face () is alignable so as to be substantially parallel with the surface of the sewn-product support or of the needle-hole plate (). The fastening element () or the setting element () is releasably held in the feed-dog holder ().

Device and method for manually changing a feed dog

A quilting device () comprises a processing unit () which is mounted on a frame () so as to be manually displaceable in two movement directions (MM) by an operator. A detection device () having sensors () detects the guiding force which is exerted in these movement directions (MM) by the operator. A controller device () controls or regulates, respectively, auxiliary motors () which support the guiding force, so as to depend on the detected guiding force.

Quilting device

A device and the method for influencing the position of the knot () between the upper thread () and the lower thread () when sewing with a sewing machine () using a computer (), which calculates for every sewing stitch to be formed a control value for an actuator (), by which a braking force of the thread tension regulator () is controlled.

Device and method for influencing the position of knots between the upper thread and the lower thread when sewing with a sewing machine

The activation for a path and time related motion of a thread cutting and lead-in stitching unit () and the thread brake () occurs by a cam drive driven by the primary shaft () and a cam drum () arranged on the upper shaft (). This way, an absolute synchronization of the elements of the thread cutting and lead-in stitching unit (), the thread brake (), and the hook as well as the needle is ensured.

Activation device for a path and time dependent motion of a thread cutting and lead-in stitching unit

For the continuous drive of a hook of a sewing machine, two drive cams () alternately engage in the back of the hook. During the passing of the upper thread loop, the respective drive cam () on which the thread would get hung up is out of engagement. The hook is situated in a conical hook race guide and is held therein by magnets.

Hook system for a sewing machine

A method for cutting the lower and at least one upper thread for lead-in embroidering or lead-in sewing is performed with a device including thread catchers (-) connected with each other in a fixed manner and layered over top of each other, formed of sheet metal, as well as spring and thread tightening plates (and) arranged above and below the thread catchers, which move back and forth against a blade (), and a thread wiper unit. The device is exclusively operated by a drive moving back and forth and driving the thread cutting and lead-in stitching unit ().

Method for cutting the lower and at least one upper thread and a method for lead-in stitching as well as a device for implementing the method

A holding device () for a tool, e.g., a textile marker (), for the processing of a textile or non-textile sheet material () is attached to the presser foot bar () of a sewing machine (). The tool is supported by a tool holder () so that it can move on a base part () of the holding device () and can be changed in its position or activation through movements of the needle bar () of the sewing machine ().

Holding device for a tool for processing a textile or non-textile sheet material for a sewing machine

Growing community of inventors

Steckborn, Switzerland

Severin Brunner