| 摘要 |
A printer of the present invention includes drive pulleys each being mounted on a particular print drum. The print drums each has a pitch circle diameter and a number of teeth related to each other as:<paragraph lvl="0"><in-line-formula>d/z<1</in-line-formula>where d denotes a pitch circle diameter and z denotes a number of teeth. The printer can therefore use a timing belt having a pitch of 3 mm or less designed for accurate transmission. This reduces jitter between the timing belt and the toothed drive pulleys and reduces the positional deviation of a core wire included in the timing belt, thereby reducing an offset ghost.
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