| 摘要 |
A pair of rollers (1,2), identical in all respects, have pyramidal teeth (3) arranged in circumferential and longitudinal runs. The rollers are mounted on parallel axes so that the teeth intermesh. The foil is fed between the rollers and rows of small indentations are formed on both sides of the foil. The pyramidal teeth have a height of 0.25 to 0.3 mm and the teeth intermesh to a depth of 0.15 to 0.20 mm. The rollers are self-synchronising so that no extra synchronising drive is required. |
