Method and apparatus for making a metal can
US4536243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Nov 2, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2684
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of, and apparatus for, manufacturing a metal can (1) with an annular seam (5) which is capable of withstanding high internal pressures and resisting chemical action. A piece of thermoplastic tape is heat bonded to the outer surface (10a.sub.3) of the open end portion (10a ) of a first can section (10) so as to leave a portion (11a) projecting therefrom. After being bent radially inwardly of the first can section, the projecting tape portion is further folded back into forced contact with the inner surface (10a.sub.2) of the open end portion of the first can section by means of a mandrel (16). The open end portion of the first can section is then heated, with the fold of the tape held pressed against its inner surface by the mandrel, to cause adhesion of the thermoplastic tape to the outer surface, edge (10a.sub.1), and inner surface of the open end portion of the first can section. An adhesive layer (4) is thus provided. This open end portion of the first can section is then press-fitted in the open end portion (2a) of a second can section (2), and the joint (44) therebetween is heated to cause adhesion of the lapping open end portions of the can sections to each other via…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.