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:
Sep. 04, 1990
Filed:
Jun. 09, 1988
James C Malloy, Ferndale, MI (US);
Other;
Abstract
A process for cleaning organic material from the orifices of spinnerettes is disclosed. The spinnerettes are immersed in a fuse oxidizing salt bath between 500.degree. F. and 900.degree. F. The spinnerettes are placed with the orifices at an angle of 30.degree. to 75.degree. with respect to horizontal which will allow the escape of trapped gasses but prevent the settling of particles therein. The entrances of the orifices are oriented upwardly. The work pieces are treated until evidence of the reaction ceases, and are then quenched. In some cases a second treatment cycle may be necessary. The second treatment cycle may be at the same or higher temperature and in the same or a different salt. Vibration of the spinnerettes during the immersion is also desirable.