| 摘要 |
PROBLEM TO BE SOLVED: To prevent vibration of a spacing belt. SOLUTION: In a dot serial printer having a carrier 3 and a printing pin head 2 mounted on a first side of a spacing belt 6 which is hung across the rotation axis of a spacing motor 7 and a pulley 8, a vibration preventing roller 12 is provided on a second side of the spacing belt 6. The vibration preventing roller 12 is attached on a bracket 13 fixed on a stay 9.
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