81
b Press Section
chap.2
bPress Section
1. Description
(1) Press Roller Timing & Printing Area
Description
In this machine, the master is rolled up to the
drum, ink is transferred to the drum and the
printing paper is pressed to the drum by the press
roller to print.
Printing is performed on only the sections that
meet the following requirements.
1) The sections of the master on which holes are
made by processing platemaking. (platemaking area)
2) The hole sections of the drum.
3) The section of the drum pressed with the
press roller. (the area pressed ON)
When the pressed-on position is 0 under the
normally adjusted conditions, relations among 1), 2)
and 3) are as follows*-
Drum gear
Press roller
Press lever
P-roller sensor
(mm)
DP-440/430
428
438
423
Press ON length
Drum hole section length
Printing area length
440308
Center of the
master clump shaft
Bottom end of the
hole section
Cam
Paper
Cancel lever
Signal solenoid
Contact pressure unit
70
42315
6
54
( mm )
Cancel lever
DP-340/330
370
370
355
: 438
: 370
DP-340/330
DP-440/430
: 423
: 355 Printing area
DP-340/330
DP-440/430
: 428
: 370 Press area
DP-340/330
DP-440/430
: 310
: 270
DP-340/330
DP-440/430
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