20
Printing on non-porous surfaces, such as waxed or varnished cartons, can be accomplished easily with Univer-
sal Non-Porous Mini-Coders. The selection of an appropriate place for installation on your conveyor line or other
packaging equipment is a very important consideration in the performance of your coder. The most important
factor to consider is carton alignment. To ensure print reliability and prevent damage to your coders, the cartons
must be accurately guided through the printing station by guide rails. If your conveyor is not equipped with guide
rails - they must be installed before proceeding with coder installation.
CARTON ALIGNMENT
Proper alignment of the cartons as they pass the printing station is imperative as shown in Figure 33. Improper
alignment will produce poor print quality, poor print registration, and in extreme cases, could damage the ma-
chine.
Universal Non-Porous Mini-Coders are spring loaded so that the print drums will press against the carton surface
on contact. This pressure is necessary to accomplish the friction drive rotation of the print drum and ensure
enough printing pressure to give you a sharp impression. The spring tension mechanism on the coder will also
compensate for slight variations in the width of the cartons without jamming the conveyor line. Excessive pres-
sure, caused by improperly guided cartons, will result in smudged impressions and could cause damage to the
spring tension mechanism.
FIGURE 33
GUIDE RAILS
PROPER ALIGNMENT
IMPROPER ALIGNMENT
CARTON PRINTING
Summary of Contents for MC-10 Series
Page 34: ......
