Patent Number: 6,169,862

Title: Image forming apparatus with nip time changing device

Abstract: An image forming apparatus includes a transfer drum which attracts and holds a transfer paper electrostatically. A voltage is applied to a conductive layer provided on an inner side of the transfer drum, and a grounded conductive electrode member is pressed against a dielectric layer provided on an outer side of the transfer drum through the transfer paper. A toner image formed on a photosensitive drum is transferred onto the transfer paper when the transfer paper is wound around the transfer drum and brought into contact with the photosensitive drum. A nip time changing controller changes the amount of time that a transfer sheet is in the nip between the transfer drum and the grounded conductive electrode member.

Inventors: Abe; Takuya (Chiba, JP), Toizumi; Kiyoshi (Chiba, JP), Shimazu; Fumio (Chiba, JP), Yoshimoto; Hiromu (Yamabe-gun, JP), Yamauchi; Kouichi (Yamatokoriyama, JP), Tachiki; Hiroshi (Yamatokoriyama, JP), Oikawa; Tomohiro (Chiba, JP), Iwakura; Yoshie (Narashino, JP), Katoh; Atsuyuki (Tenri, JP)

Assignee: Sharp Kabushiki Kaisha

International Classification: G03G 15/16 (20060101); G03G 015/16 ()

Expiration Date: 01/02/2018