Printronix l7032 参照マニュアル
260
Chapter
3
Bar Codes
Royal Mail
The Royal Mail bar code, like POSTNET, is used for mailing applications.
However, the bar code can encode full addresses on labels. Royal Mail bar
codes are similar to POSTNET in terms of bar space and width, but have four
different types of bars (Full Height, Ascender, Descender, and Tracker),
whereas POSTNET only has two bar types (Tall and Short).
However, the bar code can encode full addresses on labels. Royal Mail bar
codes are similar to POSTNET in terms of bar space and width, but have four
different types of bars (Full Height, Ascender, Descender, and Tracker),
whereas POSTNET only has two bar types (Tall and Short).
The Royal Mail symbology converts alphanumeric characters into patterns of
four bars, using combinations of Full Height, Ascender, Descender, and
Trackers. It also adds start and stop bar codes as well as a check digit.
four bars, using combinations of Full Height, Ascender, Descender, and
Trackers. It also adds start and stop bar codes as well as a check digit.
Quiet Zone
The bar code structure requires a completely blank quiet zone which is a 2mm
border on each side of the bar code.
border on each side of the bar code.
Start/Stop Code
The start and stop bars identify the orientation of the bar code. The start bar
consists of an ascender bar, and is positioned at the leftmost end of the bar
code. The stop bar consists of a full height bar, and is positioned at the
rightmost end of the bar code adjacent to the check digit.
consists of an ascender bar, and is positioned at the leftmost end of the bar
code. The stop bar consists of a full height bar, and is positioned at the
rightmost end of the bar code adjacent to the check digit.
Data Field
Royal Mail bar codes use four types of bars to encode its data: Full Height,
Ascender, Descender, and Tracker. Each Full Height bar is 0.198 inch ±
Ascender, Descender, and Tracker. Each Full Height bar is 0.198 inch ±
0.030 inch. The Ascender and Descender bars are about 62.5% of the Full
Height bar in length, while the Tracker bar is about 25% of the Full Height bar.
Height bar in length, while the Tracker bar is about 25% of the Full Height bar.
Each bar
width is equal, and must be .020-inch ± .005-inch. Horizontal
spacing between bars (pitch) must be 22 bars ±
2 bars per inch over any
0.50-inch portion of the bar code.
Royal Mail bar codes have a variable length of data field, which consists of
valid characters “0” through “9” and “A” through “Z”. Each character is
encoded with four bars of varied types.
valid characters “0” through “9” and “A” through “Z”. Each character is
encoded with four bars of varied types.
Check Digit
A modulo-6 check digit is added automatically to the end of the bar code to
verify accurate scanning.
verify accurate scanning.