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:
May. 21, 1991
Filed:
Oct. 23, 1989
Oliver Putz, Ostfildern, DE;
Herbert Konig, Ebersbach/Fils, DE;
Zinser Textilmaschinen GmbH, , DE;
Abstract
A method and apparatus for monitoring the proper grasping and release of yarn tubes by an automatic bobbin changer in removing fully-wound yarn tubes from, and placing empty replacement yarn tubes onto, the spindles of an associated ring spinning machine or ring twisting machine. After an operation of the bobbin changer for either grasping or releasing yarn tubes, a light beam is directed through an area previously occupied by the tubes, a determination is made whether the light beam is interrupted by any tube which the bobbin changer failed to grasp or release, and if so, a failure signal is generated to interrupt continued operation of the bobbin changer.