| 摘要 |
<p>888,195. Selective punching machines. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 27, 1960 [May 18, 1959; May 27, 1959], No. 14731/60. Class 31(2). A roller feed mechanism comprises two pairs of rollers co-operating in the feed action, one pair of rollers being continuously driven during an operational cycle of the mechanism and the other pair being driven intermittently during the same operational cycle of the mechanism and the two pairs of rollers being interconnected mechanically so that during one cycle of operation of the mechanism one pair of rollers is feeding while the other pair is not feeding. As shown in Fig. 1, cards are fed through a punching station 22 by means of intermittentlydriven rollers 24, 26 co-operating with rollers 25, 27 and by means of continuously-driven rollers 150, 151 co-operating with rollers 152, 153. Each roller 150, 151 is provided with a peripheral recess 180. The shafts 170 of the rollers 25, 27 are carried by pivotally-mounted links 166 operable by cams 160 on the shafts 162 of the rollers 24, 26 to separate the rollers 25, 27 from the rollers 24, 26; alternatively, each roller 24, 26 may have a peripheral recess. The rollers 24, 26 are driven from a main shaft 34, Fig. 2, by means of a driving-wheel 38 having pins 40 co-operable with slots 46 in Geneva wheels 42, 44. Read station 21 is used if information from a card is to be transmitted to a calculator and then fed back into station 22 for punching into the card. Read station 28 is used if information from a preceding card is to be reproduced into an immediately succeeding card. A cam-operated link 206, Fig. 1, has a head 210 for engaging the trailing edge of a card so as to move the card up to, and register it at, the punching station. Interposers 94 are selectively movable by the energization of electromagnets 140 to cause a punch bail 84 to operate punches 60 to punch holes in a card. The machine is provided with a rotatable offset stacker 242, Fig. 2, which is operable by the energization of an electromagnet 246 when a card has not been punched or has been punched in error. To accommodate different thicknesses of cards, the shafts 162, 170 of the feed-rollers are supported by a plate 174, Fig. 3, which is raised and lowered by means of eccentrics 99, 101 coupled by a steel tape 105 and movable in elongated slots 103, 113, the shaft 192 of the eccentric 99 being turned by means of a knob 107. In operation, the rollers 151, 153 impart an initial continuous motion to the card and then the rollers 24, 25 impart an intermittent motion to the card as it passes through the punching station 22. The rollers 26, 27 receive the card from the station 22 with an intermittent motion and then the rollers 150, 152 impart continuous motion to the card.</p> |
