Formax 6600 Series - Manual (Page 31)

31
ENGLIS
H
7.8 Feeding documents
The feeding of documents is shown in the figure below.
7.9 OMR code
Function
In order to handle computer printed documents
fully automatically, code marks are printed on
each document.
With the first four fold types (refer to section
"Feeding documents"), the first sheet of a set
always contains the address. In case of a zig-
zag fold the address has to be printed on the
last page of the set. A full length code is printed
on every sheet of a set.
The code on the last sheet of the set contains
the insert instruction. The other sheets carry the
accumulate instruction. If a parity check is used,
this is checked on each sheet. If the set contains
only one sheet, it is the “last” sheet. The code
must appear in the same location on every page
regardless of the actual code length.
Printing quality
Criteria:
• marks should be printed in black.
• marks on the same sheet must have equal
intensity.
• for matrix printers near letter quality (NLQ)
printed characters are preferred to obtain
maximum blackness (double strike).
• be aware of background “noise”. This can be
color changes on the form, background
design, a logo or copy on the opposite side of
the sheet that will bleed through and be read
by the reading head.
• the ribbon or toner quality must be checked.
• printing must be done on the same position
on every sheet.
Minimum code/basic commands
The minimum code is one mark in one line
(insert). However for reliability it is advised to
use at least 2 marks (see figure below). The first
line is the start mark. A mark printed on the
second line means insert, no mark printed
means accumulate (this can be reversed on
request).
no fold
single fold
letter fold
zig-zag fold
double
parallel fold
Fold type Type of documents Loading positions
Address carrier,
face up and leading.
Address carrier,
face down and trailing.
address
first page
OMR
start
reading
OMR
stop
reading
address
OMR
start
reading
OMR
stop
reading
(duplex printed)
last page
1 2
3
3
2
1