| 摘要 |
Sheet slitting and punching apparatus for cutting a large elongate sheet of paperboard or similar material into a plurality of rectangular cards of uniform size and punching holes in each of the individual cards. A large sheet is fed along a conveying means having two tandemly arranged feed sections separated from each other by a transverse and a longitudinal slitting station. Both feed sections of the conveyor are driven from a common drive means, however, the upstream or infeed section is driven at a conveying speed substantially slower than that of the downstream or outfeed section. Transversely spaced slitters form longitudinally extending slits in the sheet as it is fed along the conveying means. When the feeding end of the sheet reaches a predetermined location near the upstream end of the outfeed conveyor, it engages a sensing element which immediately stops the conveyor drive. While the conveyor drive is stopped, a transverse slitting member is driven transversely across the sheet from one side to the other and a punch assembly is actuated to punch holes in each of the cards so formed. At the conclusion of a transversely slitting and punching operation, the conveyor drive is restarted and that portion of the sheet downstream from the transverse cut is carried forwardly away from the advancing sheet by the higher speed of the outfeed conveyor section so that the newly formed leading end of the sheet can actuate the sensing means when it arrives at the predetermined location on the outfeed section.
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