Theory Of Mechanism Operation; Printing Mechanism - Brother PT-9200PC Service Manual

2.1

THEORY OF MECHANISM OPERATION

2.1.1

Printing Mechanism

(1) Construction of thermal head
This machine uses thermal transfer printing. The thermal head contains 384
heating elements vertically arranged. The size of one heating element is
0.08 mm wide by 0.0705 mm (pitch) high, as shown in Fig. 2.1-1.
(2) Theory of printing
During printing operation, the cylindrical rubber platen crimps the tape* and the
ink ribbon** on the thermal head. At this time, the CPU selects the required
heating elements out of the 384 heating elements to energize them. The
theory of printing depends on the use of non-laminated thermal film tape
cassettes or other tape cassettes:
(*) Laminated tape when using laminated tape cassettes.
Non-laminated tape when using non-laminated tape cassettes.
Instant lettering tape when using instant lettering tape cassettes.
Fabric printing tape when using fabric printing tape cassettes.
Stamp tape when using stamp tape cassettes.
(**) When using non-laminated thermal film tape cassettes, no ink ribbon is
present.
27.056 mm
Fig. 2.1-1 Heating Elements of the Thermal Head
0.0705 mm (1/360")
0.08 mm
II - 1