DRUM SECTION
THEORY OF OPERATION
GR37702 - 3
3. INK SUPPLY SYSTEM
As the Main shaft catch rotates, the squeegee roller and the ink driving shaft are turned. There is a slight gap
between the squeegee roller and the doctor roller, through which ink, applied on the squeegee roller, is supplied
inside the drum. A swirl of ink is produced on the driving shaft and is rotated along with the shaft, where the swirl
is maintained in consistent size. As ink is used in printing and the ink swirl gets apart from the ink sensor, the ink
motor is turned ON so that ink is sucked from the ink bottle by the ink pump until ink comes in contact with the ink
sensor. Further, ink is supplied through the ink distributor on to the squeegee roller.
Ink held by the ink distributor is all supplied to the squeegee from the elbows at both ends of the distributor.
Occurrence of overflow of ink in the drum is detected by the overflow sensor.
Linking disc
Piston
Inking motor
Elbow
Main shaft catch
Squeegee pulley
Ink driving shaft axis
Overflow sensor (short)
Ink sensor (long)
Ink driving shaft
Ink distributor
Doctor roller
Squeegee roller
Elbow
Piston
Valve
Coil spring
RC Coil spring
Squeegee roller
Ink distributor
Ink sensor
Doctor roller
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