| 摘要 |
<p>1,059,699. Punching apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 8, 1965 [Dec. 21, 1964], No. 51952/65. Heading B4B. Rotary punching apparatus comprises two feed rolls coupled together for synchronous rotation in opposite directions and at least one pair of complementary punch and die members mounted respectively one on each roll and adapted to overlap one into the other as the rolls rotate to provide a punching operation, the leading and trailing sides of the punch and die members being relieved so as to reduce the interference between the members. As shown, a pair of punch buttons 46 are mounted at each end of the roll 10 to mate with die buttons 48 mounted on the roll 12. The centre lines of the punch buttons are inclined at an angle a away from a centre roll radius and the centre lines of the die buttons are inclined at an angle a towards a centre roll radius. The punch and die buttons remove substantially arcuate V-shaped portions from opposite edges of a web 11 of card material. The chips cut from the web pass through ports 50 which communicate with a central opening 52 in the die shaft 20 which is connected to a vacuum source. In a modification (Figs. 7a and 7b), the invention is applied to a rectangular punch and die arrangement, the die button having a split construction. In another modification (Figs. 8a and 8b) the punch and die rolls are provided with circular punch and die buttons each having a split construction.</p> |
