II - 5
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Adhesive Base Tape Feeding (only for laminate tape cassettes)
A laminate tape cassette contains both a transparent laminate tape roll and a
separate adhesive base tape roll.
When a transparent laminate tape and adhesive base tape pass through the contact
point (between the tape feed roller and tape feed sub roller), they are then bonded
together into a single, printed tape. The ink printed on the laminate tape is, therefore,
sealed up with the adhesive base tape.
■
Ink Ribbon Feeding
As the drive motor rotates, the ribbon drive cam located at the middle of the gear train
rotates counterclockwise. When fitted on the ribbon drive cam, the ribbon take-up roll
in the tape cassette also rotates to take up the ink ribbon.
To apply proper tension to the ink ribbon between the platen and the ribbon drive cam,
the feed amount of the ribbon drive cam is slightly greater than that of the tape feed
gear. The difference between the feed speeds at the platen roller and at the ribbon
drive cam is absorbed by the clutch spring which is integrated in the ribbon drive cam
and allows the cam to slip.
This way, the ink ribbon is kept tense, which enables the ribbon to clearly separate
from the tape at the stabilized angle after printing.
Figure 2.1-6 Ribbon Feeding Mechanism
Tape feed
sub roller
Roller holder ASSY
Thermal head ASSY
Ink ribbon
Ribbon drive cam
Platen roller
Drive motor
(DC motor)
Platen idle gear
Tape idle gear
Tape feed roller built in
a tape cassette
(Tape idle gear)
Summary of Contents for PT1090 - P-Touch - Labelmaker
Page 1: ...SERVICE MANUAL MODEL PT 1090 ...
Page 7: ...I 3 Figure 1 1 2 Display and Key Arrangement USA version EUROPE version ...
Page 74: ...A 1 Appendix 1 Main PCB Circuit Diagram NAME CODE MAIN PCB CIRCUIT DIAGRAM PT1090 LW4024001 ...
Page 75: ...A 2 Appendix 2 Key PCB Circuit Diagram NAME CODE KEY PCB CIRCUIT DIAGRAM PT1090 LW4025 001 ...
