| 摘要 |
<p>PROBLEM TO BE SOLVED: To relax the limit of a printing area for a ridge part and a velley part of perforations by installing a circultar arcuate surface the the limit of a printing area for a ridge part and a valley part of perforations by installing a circular arcuate surface along the circular arc shape of a photoreceptor drum on a paper guiding surface of one retractor among retractors on the upstream side and the downstream side. SOLUTION: In a transfer part, a toner image is continuously transferred to a paper 1 which is opposed to the photoreceptor drum 4 by a pair of retractors 2 and 3 from behind at an opposing part b1 with leaving a minute opposing gap C1. Inside the retractors 2 and 3, a transfer device 7 for generating a high voltage is installed, and the printing paper 1 is electrostatically charged through the gap between the retractors 2 and 3 so that an image may be easily and electrostatically transferred. Since on the printing paper 1 running face side of the other retractor 3, the circular arcuate surface 3a is formed along the circular arc shape of the photoreceptor drum 4, and the printing paper 1 runs on the circular arcuate surface 3a of the retractor 3 at transfer, the paper 1 is opposed to the photoreceptor drum 4 with leaving a prescribed narrow distance C1 and also at the opposing part b1 where a transfer length is made longer.</p> |
