The Patch Readers; Patch Types - Kodak i1840 User Manual

Patch function
overview

The Patch Readers

Patch types

Patch 1
4-12
All i1800 Series Scanners provide toggle patch capability. This type of
patch is used to trigger the scanner to switch from the current image
stream (black-and-white) to the alternative image stream (color/
grayscale).
The Patch Readers allow you to automatically increment the image
address or initiate a special function. Image addressing must be
enabled in order to use the Patch Readers. Patch sheets are inserted
during document preparation.
There are four off-center, permanently mounted Patch Readers. They
can be independently enabled or disabled by your capture software
application.
If more than one Patch Reader is enabled and any one of the enabled
Patch Readers successfully decodes the patch, then the patch will be
read. Also, if the patch bars pass under more than one patch head that
is enabled, there is a higher probability that the patch will be read.
NOTE: Almost all patch reading problems are related to poor quality
patch codes or patch sheets. Using only the best quality printed
patch sheets will ensure the highest possible read rates.
See Kodak publication A-61599, Patch Code Information, for complete
information.
Patch Types 1, 4, and 6 — these patch types can be used by the
capture software application to perform post-scan functions. These
patches are not used for image addressing.
IMPORTANT: Do not use these illustrated patches for production —
they are not to spec.
Patch 4
Toggle Patch — the Toggle patch is a Type 4 patch that is used to
trigger the scanner to switch from the current image stream (black-and-
white) to the alternative image stream (color/grayscale).
NOTE: Toggle patch orientation is different depending on whether
image addressing is disabled or enabled.
Patch 6
A-61555 May 2010