HP 2500C Series - Manual (Page 128)

Functional Overview 6-8
Paper Paths and Components
Star-wheel Spring
It is a coil spring type loaded transversely. The objective is that the spring force is high
enough to eject all the media supported and is low enough not to produce any star-wheel
track marks or minimum marks within the acceptable level.
Spring force (@ span 14.2 mm and deflection 1.5 mm) : 19 gm
Deflection in assembled condition : 1.5 mm
Allows additional deflection to accommodate paper thickness : 1.2 mm
and other unusual operation (example: paper jam removal)
Output Mechanism
Output Ramps
Four sets of ramps are used to support different media from Post Cards to Super B-size
media during printing . This creates a bow-shape especially for media sizes B5,A,
Letter, Legal by stressing the media thereby increasing the drying time to avoid smearing
on the previous printed media.
Ramp Profile
The ramp has a slope in two stages with respect to horizontal or paper axis to increase
the resistance gradually.
1
st
stage angle :21
°
2
nd
stage angle :30
°
Ramp also has slope in front direction which helps media to form bow-shape. Ramp
edges have been curved to reduce friction with mating platen surface.