[GreenKeys] how did the ap and upi teletypes motor on and off? i do not s...

[Sheldon Daitch]

Ed,


thanks for adding that about the one-ply NCR impact paper.

The Extel printers used by the wire services were bought with either the impact paper or the ribbon printing, although I'd guess the ribbon printing machine would work with the impact paper.

One point on the ribbon printing Extels, the coarser TTY ribbons didn't work too well with the Extels.  The Extel printer head used 7 needles (maybe more?) and required the finer thread count of the nylon ribbons so the needles would not snag on the ribbons.


Sheldon


________________________________
From: COURYHOUSE at aol.com <COURYHOUSE at aol.com>
Sent: Wednesday, April 6, 2016 7:31 PM
To: jhhaynes at earthlink.net; Sheldon Daitch
Cc: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] how did the ap and upi teletypes motor on and off? i do not s...

Jim - and  the roll if impact paper we have  on our EXTEL at SMECC is  dead!  -Alas....

Ed#


In a message dated 4/6/2016 4:02:54 A.M. US Mountain Standard Time, jhhaynes at earthlink.net writes:
On Wed, 6 Apr 2016, Sheldon Daitch wrote:

> The Extel printers were usually set up for roll paper.  The roll paper was a
> little bit thinner, and didn't last nearly as long as a box of fanfold, but
> seems to me that the Extels might not have been able to pull the fanfold
> paper through the printer.
>
A lot of the Extel printers were ribbonless and used a special impact
sensitive paper from 3M that must have been expensive.  Other Extel
printers were fitted with ribbons and could use ordinary paper.  So
far as I know you can't get the impact sensitive paper anymore, so
Extel printers without the ribbon mechanism are dead.


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