Riso ComColor X1 series Technical Manual page 218

Ink Flow Section
Pressurized Ink Tank
This tank, positioned higher than the head, stores ink separately for all four colors.
An ink level detection sensor is incorporated in the tank, for detecting the level of ink in the tank. (The sensor
determines whether ink is at the correct level or at a low level.)
Ink supply is controlled based on ink levels in the tank.
Negative Pressure Ink Tank
This tank, positioned lower than the head nozzles, also stores ink separately for all four colors.
An ink level detection sensor is incorporated in the tank, for detecting the level of ink in the tank. (The sensor
determines whether ink is at the correct level or at a low level.) Ink supply is controlled based on ink levels in
the tank.
Circulation Pump
Comprised of a pump for circulation of ink from the negative pressure ink tank to the pressurized ink tank and
an overflow pan.
The circulation pump incorporates piston pumps that can drive the supply of ink independently for each color.
Air inlet
< Pressurized Ink Tank >
Circulation pump
< Negative Pressure Ink Tank >
[ 11A-6 ]
Ink level detection sensor
Ink level detection sensor
ComColor Series (Revision 2.4)