Oki LD670 Mode D'emploi page 43

Figure 1
Figure 2
Note: Fanfold paper must be placed at least 20 mm from the rear of the
printer. When this requirement is satisfied, paper can be stacked up to
180 mm (see Figure 1).
When fanfold paper is placed in contact with the rear of the printer,
paper can only be stacked up to 80 mm (see Figure 2).
Note: Also, the paper location must be confined to an area between the left
and right edges of the printer.
20 mm or more
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Max 180mm
Max 80mm