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Duplexing paper labels
Duplexing paper labels
Due to the special construction of labels, they are not typically duplexed. However, if certain design, construction, and
usage guidelines are followed, you can print on both sides of the label sheet successfully.
When developing a paper label for duplexing, the converter should ensure the label design protects against contamination
or buildup. Contamination adversely affects paper feeding and causes paper jams in the printer.
We recommend labels used for duplexing have a non-adhesive border around the label area. In addition, make sure the
release strength is sufficient to withstand temperatures of 225°C (437°F) and pressures to 25 psi. This is particularly
important with a duplex application since the label is subjected to these extremes twice. Use label
ties
whenever possible.
These small uncut areas (approximately 1.6 mm or 0.06 in.) help stabilize the label sheet and prevent tearing at
perforations and die-cuts during printing. In addition, using ties helps prevent the labels from predispensing in the printer.
The slits and cuts in the labels expose the adhesives to the printer. For best results when duplexing labels, position the
label sheet so the slits and cuts are
not
aligned with the ribs in the duplex or redrive areas of the printer. (
Figure 1
and
Figure 2 on page 15
illustrate the rib locations for the Optra S and the Optra T, respectively.) This eliminates any contact
points between the label adhesive and the printer, thereby preventing any adhesive contamination in the printer.
Other steps to ensure optimal printing include orienting the label in the tray so the label end is fed into the printer first and
using long grain paper. Long grain paper tends to feed more reliably than short grain paper, which tends to curl more easily.
As with any industry, product changes and improvements are constantly being developed. Therefore, if a converter
develops a short grain sheet for use with duplexed labels, test the sheet to make sure it performs satisfactorily. We
recommend testing any material with your application and printer before purchasing large quantities.
To use the duplex label application, you
must
install a special fuser wiper.
The wiper makes it possible to print on both sides of paper labels specifically designed for duplexing. In addition, you can
use the wiper to simplex paper labels and duplex paper in the same printer. When ordering a new cartridge, be sure to
order the cartridge that includes the correct fuser wiper.
Figure 1.
Optra S rib locations (rib width = 2mm)
Printer
Fuser wiper part number
S1855, T612, T614, T520, and T522
99A1082
T620 and T622
18A1467
T630, T632 and T634
56P2109
T64x, X644e, and X646e
40X2666
20
mm
21
mm
27 mm
22 mm
15.5 mm
21.5 mm
28 mm
26 mm
17 mm
15 mm
Refer
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pl
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