HP 2500C Series - Manual (Page 141)

Functional Overview 6-21
Paper Paths and Components
Dual Bin Pick And Feed Mechanism
Pick And Feed Schematic
Figure E
The Dual Bin Pick And Feed
The pick roller is mounted to a pivot arm such that when the paper tray is pushed into its
position, the pick roller and the pivot arm will fall on the paper surface, as shown in
Figure E. A DC motor is used to supply power to provide the pick force (
µ
N, N=mg) to
drive the top media sheet(s) against the separation surface in front of the tray. The angle
of the separation surface with respect to the horizontal is in such that it ensures only one
sheet of media is fed through. The media is fed continuously until it reaches the set of
pinch rollers at the drive roller, before the drive roller takes over the driving force.
INPINCH ROLLER
PAPER
PATH
PICK ROLLER
DIRECTION
PICK FORCE
COF ~ 1.6
(BET ROLLER
AND PAPER)
SEPARATION
SURFACE COF ~ 0.6
(BET SEP. PAD AND PAPER)
GRAVITATIONAL
FORCE
TROUGH 1
DRIVE ROLLER DIRECTION
TROUGH 2