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. 06, 1978
Filed:
Feb. 11, 1977
Applicant:
Inventors:
Otto Uhlmann, Burgdorf, DT;
Norbert Stephan, Hanover, DT;
Assignee:
Marshall Richards Barcro Limited, Crook, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72275 ; 72280 ; 72283 ; 72289 ;
Abstract
The invention is concerned with a method of and apparatus for the continuous drawing of metal tubing by the die and floating plug method using rotating drawing blocks to provide draughting tension. Tube lengths are processed joined end-to-end in sequential stages with accumulators provided between adjacent dies to permit the receipt of tubing from the upstream die and the supply of tubing to the downstream die to be at different rates. Each joint between lengths is broken upstream of a die but remade downstream thereof, the accumulator absorbing and supplying tube from/to adjacent blocks while the tube rejoining process is effected.