IBM 4400 User Manual
244
Chapter
7
Bar Codes
POSTNET
The POSTNET bar code structure is illustrated in Figure 19 and described on
the following pages. The POSTNET code can be a part of the address block
and appear anywhere within a vertical 4-inch area across the length of the
mail piece.
the following pages. The POSTNET code can be a part of the address block
and appear anywhere within a vertical 4-inch area across the length of the
mail piece.
Figure 19. POSTNET Structure
NOTE: Additional information regarding POSTNET bar code requirements
can be obtained from the U.S. Postal Service's Publication 25:
A
Guide to Business Mail Preparation.
Quiet Zone
The bar code structure requires a completely blank quiet zone which extends
4.75 inches from the right edge of the mail piece. In addition, a minimum quiet
zone of 0.040-inch above and below the bar code data must also be provided.
You must provide sufficient space for this zone.
4.75 inches from the right edge of the mail piece. In addition, a minimum quiet
zone of 0.040-inch above and below the bar code data must also be provided.
You must provide sufficient space for this zone.
Start/Stop Code
The start and stop codes are referred to as “framing bars” in POSTNET. The
start and stop codes are each one tall bar, one identifying the leading and
trailing end of the bar code. The start/stop code is automatically produced
start and stop codes are each one tall bar, one identifying the leading and
trailing end of the bar code. The start/stop code is automatically produced
Return Address Area
Postage Area
1/2"
1/2"
BAR CODE DATA FIELD
START
STOP
QUIET ZONE
CODE
CODE
SR, SC
POSITION
QUIET ZONE
CHECK DIGIT
QUIET
ZONE
ZONE
QUIET
ZONE
ZONE
ADDRESS BLOCK BAR CODE READ AREA
4"