Brother International PT-9600 Service Manual - Page 17

Theory Of Operation - labelling machine

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CHAPTER II THEORY OF OPERATION 2.1 OUTLINE OF MECHANISMS 2.1.1 Print Mechanism Structure of Thermal Head The machine uses thermal transfer printing. The thermal print head has a heat generator consisting of 384 heating elements which are vertically aligned as shown in Fig. 2.1-1. Each heating element is 0.08 mm wide by 0.0705 mm high. Fig. 2.1-1 Heat Generator of the Thermal Head Printing Process When the cylindrical rubber platen is pressed against the thermal print head with the tape* and ink ribbon** sandwiched inbetween, the CPU applies electric power to the selected heating elements out of 384. * Laminate tape when using laminated tape cassettes. Non-laminated tape when using non-laminated tape cassettes. Instant lettering tape when using instant lettering tape cassettes. Iron-on transfer tape when using iron-on transfer tape cassettes. Cloth tape when using cloth tape cassettes. Thermal tape when using AV (Avery) labels cassettes. ** When using AV labels cassettes or stamp tape cassettes, no ink ribbon is sandwiched. [For tape cassettes except stamp tape cassettes and AV labels cassettes] If the selected heating element(s) generates heat, the ink on the sandwiched ribbon will be melted and transferred to the tape, producing a dot(s) on the tape. The ink ribbon and the tape are advanced and then the next heating cycle is repeated, thus forming a character on the tape. [For AV labels cassettes] If the selected heating element(s) generates heat, the thermal tape develops itself to produce a dot on the tape. The tape is advanced and the next heating cycle is repeated, thus forming a character on the tape. II-1

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II-1
CHAPTER
II
THEORY OF OPERATION
2.1
OUTLINE OF MECHANISMS
2.1.1
Print Mechanism
Structure of Thermal Head
The machine uses thermal transfer printing.
The thermal print head has a heat generator
consisting of 384 heating elements which are vertically aligned as shown in Fig. 2.1-1.
Each heating element is 0.08 mm wide by 0.0705 mm high.
Fig. 2.1-1
Heat Generator of the Thermal Head
Printing Process
When the cylindrical rubber platen is pressed against the thermal print head with the tape* and
ink ribbon** sandwiched inbetween, the CPU applies electric power to the selected heating
elements out of 384.
*
Laminate tape when using laminated tape cassettes.
Non-laminated tape when using non-laminated tape cassettes.
Instant lettering tape when using instant lettering tape cassettes.
Iron-on transfer tape when using iron-on transfer tape cassettes.
Cloth tape when using cloth tape cassettes.
Thermal tape when using AV (Avery) labels cassettes.
**
When using AV labels cassettes or stamp tape cassettes, no ink ribbon is sandwiched.
[For tape cassettes except stamp tape cassettes and AV labels cassettes]
If the selected heating element(s) generates heat, the ink on the sandwiched ribbon will be
melted and transferred to the tape, producing a dot(s) on the tape.
The ink ribbon and the tape
are advanced and then the next heating cycle is repeated, thus forming a character on the
tape.
[For AV labels cassettes]
If the selected heating element(s) generates heat, the thermal tape develops itself to produce a
dot on the tape. The tape is advanced and the next heating cycle is repeated, thus forming a
character on the tape.