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:
Apr. 07, 1998
Filed:
May. 30, 1997
Ferdinand-Josef Hermanns, Erkelenz, DE;
Ralf Hoffmann, Monchengladbach, DE;
W. Schlafhorst AG & Co., Moenchengladbach, DE;
Abstract
A method for avoiding ribbon windings in the winding of a cross-wound bobbin or cheese includes driving the cheese with a drive drum having reversing thread grooves for yarn guidance. A circumferential speed of the drive drum is continuously varied. The cheese is accelerated with the drive drum so that the cheese follows a course of motion of the drive drum with slip. A rotary speed of a drive motor is monitored with a winding station computer. The drive drum is driven with the motor acting as a moment adjuster in terms of control technology. A command value specification of a current is fed to a current regulator through the winding station computer for accelerating the drive drum with a constant preselectable moment and for braking the drive drum with another constant preselectable moment, for generating the slip between the cheese and the drive drum being varied for preventing a match in a rotary speed ratio between the drive drum and the cheese that causes ribbon windings. An apparatus for winding cross-wound bobbins or cheeses includes a drive drum acting as a drive mechanism for cheeses and having reversing thread grooves for yarn guidance and for laying a yarn. A drive motor drives the drive drum and acts as a moment adjuster in terms of regulating technology. A winding station computer is connected to the drive motor for monitoring a rotary speed of the drive motor.