| 摘要 |
861,098. Printing processes etc.; feeding webs. MINNESOTA MINING & MANUFACTURING CO. May 19, 1958 [May 20, 1957], No. 15987/58. Classes 100(1) and 100(2) A machine for recording on a heat-sensitive copy strip data from a series of coded cards comprises means for supporting an informationcarrying segment of a card and a part of the strip in contact under pressure, means for strongly, briefly, uniformly and simultaneously irradiating the contacting surfaces, means for releasing the pressure contact and advancing the strip to the next succeeding position, and means for inaugurating the cycle of operation on the insertion of a card. The strip 10, Fig. 1, is fed between a movable platen 20 and a stationary platen 70. The platen 20, Figs. 1, 2 and 5, has a bottom elastic pad 24 and is adjusted by a levelling plate 50 and screws 51, 52. When a card 80 is placed on the platen 70 and aligned by means of pins 25, 26 on the platen 20 engaging corresponding holes in the card, a switch is closed to initiate a cycle in which the platen 20 is lowered by an electromagnet 17 to press the strip 10 and card 80 together and against the platen 70, a heat radiation means in the form of a tubular lamp in the platen 70 is fixed, to blacken the strip where there are perforations in the card, the platen 20 is raised, and the strip is fed forward one step. Feeding webs. The strip 10 is fed by a take-up reel 16 driven by power through a clutch controlled by the insertion of the card 80, from a supply reel 11 under a serving roller 12 which stops the machine when the strip is exhausted or broken, under a spring-urged roller 13 which acts in conjunction with a brake associated with the reel 11 to ensure constant tension in the web, under a measuring roller 15 against which it is held by a spring-urged pressure roller 14, and to the reel 16. The roller 15 makes one revolution to feed the strip a predetermined distance, and then through a cam arrangement stops the drive of the reel 16. The strip is aligned transversely by flanges on the roller 13, and rests against a rear plate 22 secured to the platen 20, pins 21 on the plate 22 holding the strip against the platen. |
