80
Ricoh Co. Ltd.
http://www.ricoh.com/
Model: M-G1a/M-G1b/M-G1L/M-G1W/R-
G1
Machine Codes:
J017/J019/J021/J023/J018
Slide 80
Ink Pumps - 3/4
Ink pumps for new machine have been completely redesigned. Each ink color now
has its own motor (whereas one motor powered two pumps before).
Ink is pumped as the off-center cam rotates - squeezing ink through the tube
wrapped around the cam.
New design is bidirectional, enabling head tank vacuum creation when run in
reverse. (Previous design ejected ink from heads for vacuum creation.)
Gears
Pump Cam
Motor
Pump Cam
Bearing
Ink Out
Ink In
Note: Creating a vacuum in the head tanks by running the pumps in reverse not only
saves ink, but also improves maintenance unit lifespan, as there is less ink build-
up..