Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2850052A
Inventor
Max Gaul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hans Sickinger Co
Original Assignee
Hans Sickinger Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hans Sickinger CofiledCriticalHans Sickinger Co
Priority to GB2850052ApriorityCriticalpatent/GB734033A/en
Publication of GB734033ApublicationCriticalpatent/GB734033A/en
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D53/00—Making other particular articles
B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Catalysts
(AREA)
Abstract
The thickness of wall of a finished rolled or hydraulically hammered corrugated tube, e.g. of tombac, is reduced at the arcuate faces by chemical action. The corrugated tube may be compressed until the corrugations rest on one another and then treated with a mixture of nitric and sulphuric acids and sodium bichromate.
GB2850052A1952-11-121952-11-12Improvements in the manufacture of corrugated tubes
ExpiredGB734033A
(en)
Improvements in the treatment of metallic elements used in the armed concrete structures (Machine-translation by Google Translate, not legally binding)