Activation device for a path and time dependent motion of a thread cutting and lead-in stitching unit
AssigneeBERNINA International AG
InventorsSeverin Brunner, André Stucki
Life of this patent
Estimating the term…
Abstract
The activation for a path and time related motion of a thread cutting and lead-in stitching unit (7) and the thread brake (25) occurs by a cam drive driven by the primary shaft (9) and a cam drum (75) arranged on the upper shaft (17). This way, an absolute synchronization of the elements of the thread cutting and lead-in stitching unit (7), the thread brake (25), and the hook as well as the needle is ensured.
Claims11
A sewing and embroidery machine comprising an activation device for a path and time related motion of a thread cutting and lead-in stitching unit (7) driven by a coupling sled (55) as well as a thread brake (25) by a primary shaft (9) of the sewing and embroidering machine, a coupling member that is movable by a trigger signal, said coupling member depending on a rotational angle of an upper shaft of the sewing and embroidery machine inserts a switching lever (47, 51) into a link (41, 43) for cutting a thread or for lead-in stitching and thus drives the path and time related motion of the thread cutting or lead-in stitching unit (7) as well as the thread brake (25) synchronously in reference thereto.
Dependencies are inferred from the claim text.