DE2444325A1 - - Google Patents
Info
- Publication number
- DE2444325A1 DE2444325A1 DE19742444325 DE2444325A DE2444325A1 DE 2444325 A1 DE2444325 A1 DE 2444325A1 DE 19742444325 DE19742444325 DE 19742444325 DE 2444325 A DE2444325 A DE 2444325A DE 2444325 A1 DE2444325 A1 DE 2444325A1
- Authority
- DE
- Germany
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/127—Tube treating or manipulating combined with or specially adapted for use in connection with tube making machines, e.g. drawing-off devices, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2444325A DE2444325B1 (de) | 1974-09-17 | 1974-09-17 | Verfahren zum Herstellen von Schraubennahtrohren durch schraubenfoermiges Wickeln eines Bandes und elektrischer Widerstands- und Schmelzschweissung der Bandkanten |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2444325A DE2444325B1 (de) | 1974-09-17 | 1974-09-17 | Verfahren zum Herstellen von Schraubennahtrohren durch schraubenfoermiges Wickeln eines Bandes und elektrischer Widerstands- und Schmelzschweissung der Bandkanten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2444325A1 true DE2444325A1 (ru) | 1975-08-21 |
| DE2444325B1 DE2444325B1 (de) | 1975-08-21 |
Family
ID=5925951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2444325A Withdrawn DE2444325B1 (de) | 1974-09-17 | 1974-09-17 | Verfahren zum Herstellen von Schraubennahtrohren durch schraubenfoermiges Wickeln eines Bandes und elektrischer Widerstands- und Schmelzschweissung der Bandkanten |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2444325B1 (ru) |
-
1974
- 1974-09-17 DE DE2444325A patent/DE2444325B1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE2444325B1 (de) | 1975-08-21 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 | ||
| 8339 | Ceased/non-payment of the annual fee |