[GreenKeys] AP speeds #3

[Sheldon Daitch]

This reminds me of an interesting "feature" of some model
Extel RO printers.  Certain versions of the RO printer
used an electrical contact on the print mechanism to
make sure the print head was back at the left margin before it
would continue to print the next line.  If you held the
print head away from this left margin contact point, the
printer would not print anything but did store the output
data awaiting the print command.

The memory would store up to about two lines worth of text
and when the print head was released, hitting the left
margin contact, the Extel would print out all the stored
text at about 30% faster speed until it "caught" up with the
on-line incoming data, when it would resume printing at the
normal speed.

73
Sheldon