User`s manual

A–30 Bar Codes
Density and Spacing Between Bar Codes
The following subsections describe the spacing between different
combinations of horizontal and vertical spacings between the bar codes.
Horizontal Bar Codes (0 and 180 Degree Rotation)
The width of a horizontal bar code is a function of the number of characters
in the bar code symbol, the style of the bar code symbol, and the ratio of
wide light/dark bars to narrow light/dark bars. The bar code height is
specified as a parameter where the default is 0.75 inches. The
human–readable line is not included. If the human–readable line is printed, a
gap of 0.1 inch is inserted between the bottom of the bar code symbol and the
human–readable line. The human–readable line is printed below the bar code
symbol.
Horizontal bar codes (0 and 180 degree rotation), are printed at 100 dots per
inch (dpi) horizontally and 100 dpi vertically.
Horizontal Spacing Between Horizontal Bar Codes
A 0.25 inch leading space always appears before a bar code symbol and a
0.25 inch trailing space is inserted after a bar code symbol for a total of 0.5
inches of space between any two bar codes. The leading and trailing spaces
are called quiet zones.
Three delimiters are allowed for all bar code styles:
• Space character (20H), except for bar code 39
• Comma character (2CH)
• Horizontal tab character (09H)
The space character adds an extra 0.1 inches of white space between the bar
code, the comma adds no extra white space, and the horizontal tab adds the
amount set by the tabs. This additional white space is added to the 0.5 inches
of the quiet zones that separate the two bar codes.
The horizontal limit is specified by the width of the paper, typically 13.2
inches. Therefore, the width of the encoded bar code symbol plus any
spacing between two or more symbols cannot exceed 13.2 inches. If a bar
code symbol exceeds the right margin, the printable portion is printed and the
remainder is truncated.