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The carriage control tape (Figure A-I) has 12 columns
indicated by vertical lines. These columns are called con-
trol channels. One hole per horizontal line can be punched
in each channel throughout the length of the tape. A max-
imum of 132 lines may be used to control a form although,
for convenience, control tapes are slightly larger. The hori-
zontallines are spaced six per inch.
Round holes in the center of the tape are pre-punched
for the pin-feed drive which advances the tape in
synchronism with form movement through the carriage.
The effect is exactly the same as though control holes
were punched along the edge of each form.
Considerations to be made when punching a tape are
as follows:
1.
2.
A channel-l punch is required for each form to de-
fine the location of the first printing line. It is also
required to reset a channel-l2 punch, if used.
A channel-9 punch or channel-l2 punch is used to
indicate an overflow position. If a channel-9 punch
is used, a channel-} 2 punch must also be used in the
same form to reset the channel-9 condition. A
channel-l2 punch may be used without a channel-9
punch and is reset by the next channel-l punch.
Appendix A. Carriage Control Tape
~~.=.=.~~~~~
_____
...,~~
Twelve Control Channels
(Vertical lines)
i~
I~
I~
I~_-
;-OCDo.--,
~
•
;
•
I
~
S
!i
i
! i : f - - - - -.......
$
~I-----'
Each horizontal line equals
one printing line on form.
Pin-feed Drive Holes
I _ _ _ _ .....
~
Maximum of 132 lines to
control a form
Twelve additional lines
for convenience
Figure A-I. Carriage Control Tape
Appendix A. Carriage Control Tape
83
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