HP (Hewlett-Packard) 9055 Printer User Manual


 
ENWW Tray 2/3 paper feed unit 75
MFP unit explanation
Tray 2/3 paper feed unit
Composition
Note Trays 2 and 3 have the same shape and mechanisms.
Mechanisms
*1 Paper lift-up
a Hoisting of up/down plate
Paper feed trays are driven by wires.
When a paper tray is loaded, the tray
up drive motor/1(M16)/2(M17) rotates
to wind the wires around the drive
pulleys and consequently the
up/down plate in the tray moves up.
When the tray upper limit
PS/1(PS2)/2(PS8) detects the
actuator of the roller that has been
moved up by paper, the tray up drive
motor/1(M16)/2 (M17) stops.
b Lowering of tray
When the paper feed tray is pulled
out, the coupling shaft of the tray is
disengaged from the coupling gear of
the tray up drive motor on the MFP
side, allowing the up/down plate in
the tray to fall down by its own weight.
Mechanism Method
Paper lift-up *1 Up: Driven by wires
Down: Falls down by its own
weight
Tray loading Front loading
Double feed prevention Torque limiter
1st paper feed Pick roller
No paper detection Photosensor + Actuator
Paper size detection *2
(Universal)
Width: VR
Length: Photosensor +
actuators (two)
1st paper feed paper
loop mechanism*3
Photosensor + Actuator
+ clutch