Riso RP-255, Technical Manual

Page: 172 / 449

MASTER CLAMP SECTION
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F
G
A
B
C
D
E
2. Clamp Plate Master Release Mechanism
When the Start key is pressed to create confidential or normal masters, the print drum makes one turn
and checks for the presence of master on the print drum. Once the presence of a master on the drum
has been checked, the drum returns to position A, and the clamp plate master release operation starts.
The clamp motor activates and rotates the clamp cam assembly [A]. This pushes down the clamp open
arm [B] and opens the clamp plate [C]. The master release arm [D] is then pushed down, and the master
release bar [E] is raised, releasing the master from the clamp plate [C].
The clamp motor continues to run, and raises the clamp open arm [B] and master release arm [D]. The
motor is switched off once the light path to clamp sensor B [G] is opened.
A: Clamp cam assembly
B: Clamp open arm
C: Clamp plate
D: Master release arm
E: Master release bar
F: Clamp sensor A
G: Clamp sensor B
(1) The clamp open arm is pushed down,
opening the clamp plate.
(2) The master release arm is pushed down,
raising the master release bar and
releasing the master.
(3) The clamp open arm and master release
arm are raised, and the motor switches
off once the light path to clamp sensor B
is opened.
0904
0905
0906