IBM 3000 manual Used for simplex printing and is using boxed fan-fold forms

Figure 1. Forms Path Through a Printer Engine
For simplicity, Figure 1 shows a generalized forms path when a printer is being
used for simplex printing and is using boxed fan-fold forms.
1	Transfer Station
2	Fuser
3	Stacker Pendulum
4	Output Stacker Area
5	Postprocessor
6	Input Forms Area
v	Note the following differences when a printer runs in dual simplex mode, uses
	forms from a preprocessing device, and has a postprocessing device installed
	and enabled:
	± Forms enter from the right under the printer to the urge unit and then move
	up through the Forms Input area (6).
	± The stacker is disabled, and forms exit the printer to the left directly to the
	postprocessing device (5).
v	Note the following differences when you use a printer for duplex or simplex
	printing:
	± If the printer is Printer 1 in the con®guration, the stacker is disabled. The
	forms exit the printer to the left from the Output Stacker Area (4) directly to
	the Buffer/Flipper Unit.
	If a preprocessing device is installed, the forms enter from the right under the
	printer to the urge unit and then move up through the Forms Input area (6).
	± If the printer is Printer 2, the forms enter from the right under the printer
	through an Urge Unit that is placed on the ¯oor in the Forms Input area (6).
	The forms then move up through the Forms Input area.
	If a postprocessing device is installed and enabled, the stacker is disabled,
	and the forms exit the printer to the left directly to the postprocessing device
	(5).

16InfoPrint 3000 Operator's Guide