Method and device for butt welding of bar shaped structural members
Abstract
Abstract 842,782. Seaming. HERMANN, L., and PASCHE, H. Feb. 10, 1958 [Feb. 10, 1957], No. 4234/58. Class 42 (1). Joints are formed between pieces of hollow tube 1 covered with a tube 2 of plastic material by extending the tube 2 beyond the end of the tube 1, inserting a coupling element 3 into the ends of tube 1, melting the ends -of the tube 2 against heating plates 4a inserted into the gap between the tubes 2, removing the heating plates and pressing the tubes 1 and tubes 2 together so that the material of the tubes 2 is melted or welded together. As shown in Fig. 1, the tubes 1, 2 are mounted in slides 21a, 21b which are moved by means of rollers 10a, 10b on a rotatable plate 8 which co-operate with cams 19a, 19b on the slides. The heating plates 4a, 4b are moved into and out of position by means of rollers 12a, 12b which co-operate with a cam surface on the bottom of the plate 8.
Inventors
- 👤 Hermann Ludwig
- 👤 Pasche Heinz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |