Honeywell 400 Series Hardware Manual page 36

Card Handling Mechanism
The card handling mechanism includes an input hopper, card feeder, card track, dual-read
head, stacker gate, and output stacker. See Figure 4. '
HINGED COVER
NORMAL
OPERATOR'S
CONTROL PAN E L
KNIFE STOP
INPUT HOPPER
Figure 4. CRZZOl Card Handling Mechanism
The input hopper and output stacker have pusher plates that hold the cards upright. The
pusher plates swing up 90 degrees from the card reader deck to aid in adding and
removing cards without interrupting operations.
Cards are placed in the input happer 12-row up, card face toward the feed fingers at the feed
station, and column 1 toward the read station. The input hOpper holds at least 2000 cards.
Cards are picked off from the input card deck by vacuum and the pulsing feed fingers
and fed into the card transport through the feed gate.
The read station contains a light source, fiber Optics light distribution, and two vertical
columns of 12 solar cells each. The cells are spaced one column apart. Each vertical
column has one cell for each card row. As the card passes between the light sources
provided by the fiber optics and the solar cells, the punched holes are sensed. Output
from the cells is fed into the control electronics of the card reader. Each column is read
twice. The results of the first reading are compared with results from the second reading
in order to protect against misreads.
Cards go through several control stations to ensure that the cards are fed correctly and
continue an orderly advance through the card track. When a station is dark too long, this
means a card jam; the card reader is immediately powered down.
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