Image forming apparatus

摘要

An image forming apparatus including: a heating member which heats a toner image on a recording medium using a decolorizable toner containing a coloring agent containing a color developable compound and a color developing agent and having a capsule structure covered with an outer shell; a pressing member which is in press contact with the heating member to form a nip portion and nips and conveys the recording medium in cooperation with the heating member; a temperature control section which controls the temperature of the heating member to a temperature not higher than the density maintaining threshold temperature and not lower than the melting threshold temperature; and a conveyance control section which controls the conveying speed of the recording medium such that a time required for the recording medium to pass through the nip portion is 100 msec or more.

主权项

1. An image forming apparatus, comprising:
a heating member configured to be heated by a first heating source and to heat a toner image formed on a recording medium using a decolorizable toner comprising a binder resin and a coloring agent which has a capsule structure covered with an outer shell and which contains a color developable compound, a color developing agent and a temperature control agent having a temperature difference between a melting point and a solidifying point, wherein the temperature control agent cleaves a bond between the color developable compound and the color developing agent to make color of the toner decolorized when the temperature of the coloring agent reaches the temperature of the melting point; a pressing member configured to be in press contact with the heating member to form a nip portion and to heat and convey the recording medium in cooperation with the heating member; a temperature control section configured to control the temperature of the heating member to a temperature not higher than the density maintaining threshold temperature of the toner, not lower than the melting threshold temperature of the toner, and not higher than 100° C. to fix the toner on the recording medium; and a conveyance control section configured to control the conveying speed of the recording medium in the nip portion such that a time required for a point on the recording medium to pass through the nip portion is 100 msec or more.