Sheet metal container

摘要

The container has a container body with a spiral border at the open edge going round more than 360 deg , and a cover with an edge channel to fit on the border. The border is basically trapezoid in cross section, with two parallel sectors (5,6) and two side sectors (7,8). There is an end sector (9) of the border, connecting up with the larger parallel sector, supported by the connecting point (10) joining the small parallel sector (6) to one of the side sectors (8).