IBM 2740-1 System Reference Manual page 46

Figure 26. Document Insertion Feature
for printing if the operator replaces the split platen
with a standard friction-feed platen (see Split
Friction-Feed Platen).
NOTE: Pin-feed platens cannot be used when the Document Inser­
tion feature is installed.
When either of the Document Insertion fea­
tures are used (6 inch or 7-3/8 inch) the left
margin stop must be positioned at least 2. 3 inches
to the left of the first character to be printed on the
document. This allows the print element and ca r­
rie r mechanism to clear the document chute when
the document insertion device is tilted forward to
insert the document. Margins are set by pushing
the Margin Stop lever to the rear and moving it
either to the left or right to the desired location.
Therefore, the initial operation of a line-m essage
42
printout must begin with an HT (Horizontal Tab) code
to move the carrier a minimum of 23 print posi­
tions to the right. The same line-message printout
should conclude with an NL (New Line, C arrier
Return and Line Feed) code to return the print ele­
ment to its extreme left position. The following
versions of the Document Insertion feature are
available:
Feature Number 3401. This version of the Document
Insertion feature accepts cards 6 inches wide and
permits the operator to position them so that the
left edge of the card is 2-1/2 inches to the
right of the first print position.
(character-per-inch) print element is used, 25 (10
cpi) or 30 (12 cpi) characters, respectively, may be
If a 10 or 12 cpi