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:
Jan. 27, 1976
Filed:
Mar. 10, 1975
Applicant:
Inventors:
Otto Uhlmann, Burgdorf, DT;
Norbert Stephan, Ahlem, DT;
Assignee:
Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft, Hannover, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72289 ;
Abstract
Copper tubing is drawn through a die by means of a rotating drum to which the front end of the tube is fastened and may remain fastened as the drawn tubing is coiled on the drum, or the front is released, so that frictional engagement of multiple coils on the drum provide for pulling. An annulus pushes the coils down, but is retracted or remains ineffective as long as the front end of the tube is fastened.