The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1998
Filed:
Apr. 17, 1997
Kurt Arnold, Kaiserslautern, DE;
G.M. Pfaff Aktiengesellschaft, Kaiserslautern, DE;
Abstract
A sewing or embroidering machine is provided with a thread-cutting device and a signal transmitter representing the angular position of the arm shaft. The drive of the catch thread device is acted upon as a function of the signals generated by the signal transmitter according to a movement program stored in a memory. The path data of this movement program are in a defined relation to the rotary movement or the current angular position of the hook. The drive of the catch thread device is part of a regulating device operating as a cascade control or of a control device operating as a path plan control. Due to the exact agreement in time between the movement process of the catch thread device and the course of the rotary movement of the hook, the thread-cutting process can now also be carried out during the phase of deceleration of the sewing machine, so that an inexpensive, uncontrolled motor can now be used to drive the sewing machine.