
REV.-B
2.5.4
Ribbon
Feed Mechanism
The ribbon feed mechanism consists of the ribbon cartridge and the ribbon feed
I
driving gearalways turns counterclockwise, via the geartrains shown in Table 2-6,
direction of the timing belt.
Table 2-6 Ribbon Feed Gear Train
section. A ribbon
irrespective of the
Direction of Movement of Carriage
Gear Train
Left to right (arrow
●
)
Belt driven pulley
~
Planet gear (1)
+
Planet gear (2)
+
Ribbon driving gear
Right to left (arrow ~)
Belt driven pulley
~
Planet gear (1)
~
Planet gear (3)
~
Planet gear (4)
~
Ribbon driving gear
Figure 2-41 shows ribbon feed mechanism. The inked ribbon is inside the cartridge case in an endless
state, held between the ribbon feed and ribbon pressure roller mounted on the ribbon driving gear.
The rollers are driven by the movement of the gear, and the inked ribbon is fed.
A ribbon breaking spring is attached at the exit of the cartridge case to prevent the ribbon from slacking.
A ribbon mask is installed for preventing the ribbon from staining the paper.
Ribbon Feed Roller
L
‘k
Ribbon
‘
ressure
‘O’’er\
\
Ribbon Transmission Gear
W
‘ane””w
Ribbon Driving Gear
Ribbon
riage
Breaking
Spring
Fig. 2-41. Ribbon Feed Mechanism
2-42
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