| 摘要 |
PURPOSE:To constitute so that a belt part which becomes an image area becomes a constant part as much as possible, by constituting so that turning length of one turning of a belt-like photoreceptor becomes that which adds belt advancing length required formation and displaying an image (n) times, and length of a small section where a belt joint is positioned. CONSTITUTION:The sum l of an advancing distance la to an exposure spot A after an endless belt-like photoreceptor 8 which is driven intermittently starts its turning, and an advancing distance lb to a distant end 3a of a window hole 3 from the exposure position A is a distance by which the photoreceptor 8 advances by a cycle for forming and displaying one image, and against it, the overall length L of the photoreceptor 8 is constituted so that it becomes that which adds belt advancing length nl required for forming and displaying a picture (n) times, and length DELTAl of a small section where a belt joint is positioned. That is to say, this small section DELTAl is made an idle running part, the constitution is made so that each turning of the photoreceptor is always started from the base point A, by which it is prevented that the belt joints intrudes into a picture area. |
