Paper Curl - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
Paper Curl
Paper curl is inherent in the laser printing process because paper is subjected to heat on one
surface causing it to dry and shrink more than the opposite surface. The curl is always towards
the source of heat (i.e., toward the Fusing Roller). Curl tends to worsen over time as the paper
cools.
Mthough paper curl mnot be completely eliminated, some steps maybe taken to lessen its
impact. If you feel that the curl in your printed output is greater than your expectations, try some
of the following recommendations:
Table 7-48. Paper Curl
1. Try using the
printer's Face-Up
(Rear) Output Tray.
2.
Try turning the
paper over.
3.
Review paper
handling and storage
conditions.
4.
Try using a
different type of paper.
By using the printer's Face-Up (Rear) Output Tray, the paper is
transported through a straighter paper path &r it has been subjected
to the heat from the fusing station. This paper path tends to be less
stressful on the paper, decreasing its tendency to curl.
The manufacturing process for paper results in two paper surfaces,
the 'tire side" and the "felt side." Because the felt side of the paper
is usually the smoothes$ it is the preferred print image surface.
Depending upon the me of manufacturing process, one side of the
paper may have a "manufactured curl." If you are experiencing paper
curl with one surface of the paper, turn the paper over and see if excess
curl is limited to a partictir surface of the paper.
Over time, paper assumes the characteristics of iw storage environment
(e.g., if it is stored in a humid entironmen~ the paper assumes this
humidi~, etc.). Review paper specification storage requirements.
Evaluate actual storage conditions to determine if any of the
environment conditions cotid possibly restit in paper curl.
Note:
Excessively 'Wet" paper (greater than 4- 6% moisture content)
will exhibit greater curl when heated.
Ml papers are manufactured differently (e.g., different textures, moisture
content, drying processes, material content etc.). Mer changing types
of paper, note if the tendency to curl is associated with any one specific
type of paper.
7-80