[GreenKeys] Teletype Model 14, ASR 32, and Chadless Perforating

[Jim Haynes]

No, I have no idea.  I guess the most important thing is that a 32 can
read its own punched tapes, and you don't think of the 32 as a machine
that would be used in a busy communication center where messages are
being relayed by tape from one circuit to another, but I'm not aware
that the 32/33 can't read chadless tape.  I don't see any thing in the
tape reader principles of operation about chad or chadless tape.  I 
suppose it could be that the sensing pins don't push hard enough to
reliably read chadless tape, if the "lids" should happen to be pushed down
into the holes rather than being left open.

I do recall that late typing reperforators (Model 35, I'm not sure about 
28) were printing between feed holes on fully-perforated tape as an
alternative to chadless.

Of course Real Teletypers don't need none of them typing reperforators;
they can read the tape by the holes.  I remember a small delegation of
FAA people visiting Teletype to see a system being developed for them,
and some of the older ones grumbling about printed chadless tape being
too hard to read.