Printronix ThermaLine Series Programmer's Reference Manual page 210

3"
NOTE: Additional information regarding FIM bar code requirements can be
5–72
1–3/4"
SR, SC
POSITION
1/8" Clear
1–1/4"
Zone
5/8"
Figure 5–15. FIM Structure (VSCAN)
obtained from the U.S. Postal Service's Publication 25: A Guide to
Business Mail Preparation.
Bar Codes