Abstract: A skill acquisition assistance method includes a first stimulus generating step of acquiring first and second tactile data indicating tactile senses corresponding to a first body part based on an action of the first body part during work time when first and second workers perform the same work and generating a first stimulus based on the first tactile data by a stimulus transmission section mounted on a second body part different from the first body part of the first worker and a second stimulus generating step of switching a stimulus generated by the stimulus transmission section to a second stimulus based on the second tactile data in conjunction with the action of the first body part of the first worker.

Abstract: An object of the present invention is to provide an image forming apparatus which can achieve reduction in printing time, suppression of developer consumption, and implementation of silence. An image forming apparatus capable of forming a color image on an image carrier with use of developers of a plurality of different developing colors, including a plurality of developing devices respectively housing the developers of different colors, and a control section for controlling operation of the developing devices based on inputted image data, wherein the control section includes a concentration ratio recognition section for recognizing a concentration ratio of the respective colors for image data of every sheet from the image data, and controls so as to spare at least one color developer among the developers in response to the concentration ratio of respective colors recognized by the concentration ratio recognition section.

Abstract: A fitting structure for process cartridges and an image forming apparatus body of an image forming apparatus capable of fitting the process cartridges for plural colors thereto, the fitting structure including: an incompatible member with its cross-sectional shape in an axial direction being rotationally symmetrical, the incompatible member having at least one attaching projection and one displaying hole or one displaying notched portion formed on a position different from a rotational shaft of the rotationally symmetrical shape; an attached portion of the process cartridge capable of holding the incompatible member, having identification display portions for identifying the plural colors arranged on the position corresponding to the displaying hole or the displaying notched portion; and an acceptance portion of the image forming apparatus body having an acceptance concave portion for accepting the at least one attaching projection of the incompatible member.

Abstract: A fitting structure for process cartridges and an image forming apparatus body of an image forming apparatus capable of fitting the process cartridges for plural colors thereto, the fitting structure including: an incompatible member with its cross-sectional shape in an axial direction being rotationally symmetrical, the incompatible member having at least one attaching projection and one displaying hole or one displaying notched portion formed on a position different from a rotational shaft of the rotationally symmetrical shape; an attached portion of the process cartridge capable of holding the incompatible member, having identification display portions for identifying the plural colors arranged on the position corresponding to the displaying hole or the displaying notched portion; and an acceptance portion of the image forming apparatus body having an acceptance concave portion for accepting the at least one attaching projection of the incompatible member.

Abstract: An object of the present invention is to provide an image forming apparatus which can achieve reduction in printing time, suppression of developer consumption, and implementation of silence. An image forming apparatus capable of forming a color image on an image carrier with use of developers of a plurality of different developing colors, including a plurality of developing devices respectively housing the developers of different colors, and a control section for controlling operation of the developing devices based on inputted image data, wherein the control section includes a concentration ratio recognition section for recognizing a concentration ratio of the respective colors for image data of every sheet from the image data, and controls so as to spare at least one color developer among the developers in response to the concentration ratio of respective colors recognized by the concentration ratio recognition section.