摘要 |
PROBLEM TO BE SOLVED: To provide a printing device capable of suppressing a sudden and excessive web tension when the printing is started, making constant the load which the rear of a web transporter receives at normal times, and reducing a dislocation in the transcription due to a speed variation by stabilizing the web transporting speed. SOLUTION: The printing device is equipped with a transporting mechanism to transport a web to a transcription part and a tension generating mechanism to give a tension to the web fed to the transporting mechanism, wherein the tension generating mechanism is composed of a tension generating roller capable of changing the tension given to the web in accordance with the rotating position, a tension guide to make rotation in accordance with the size of the tension generated by the roller, a first sensor to sense the rotating position of the tension guide, a second sensor to sense the rotating position of the tension generating roller, and a driving means to control the rotation of a motor in accordance with the outputs of the first and second sensors. COPYRIGHT: (C)2004,JPO
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