Device for sensing coded performations

Abstract

Abstract A card feeder for feeding cards from a stack in an input hopper to a reader, punch or other data processing equipment is disclosed. Features include a hopper having a canted feed roll structure and a throat roll for moving cards against a reference edge as they are fed out of the hopper. The feed roll structure comprises a plurality of flexible wafer-like segments each independently yieldable on their drive shaft. All of the sections have a high coefficient of friction on their card engaging surface. The drive roll structure and throat roll are driven by a low inertia motor which is provided with control circuitry for reversing the motor in response to card position when the card leaves the surface of the drive rollers. This restacks a card which has been dragged by friction out of its position of alignment with the other cards in the stack. Also disclosed are reader features including a parabolic lens, drive rolls for maintaining cards fed from the hopper in aligned position as they are read and cantilevered idler rollers which are adjustably mounted so that there is a clearance between the rolls when cards are not passing through.

Inventors

• 👤 R Miller
• 👤 W Dorfman

Bibliographic Details