Abstract: The image forming apparatus is provided with first spacing members having an outer diameter larger than that of a first developing roller, which first spacing members are disposed at two ends of the first developing roller coaxially with the first developing roller, second spacing members having an outer diameter larger than that of a second developing roller, which second spacing rollers are disposed at two ends of the second developing roller coaxially with the second developing roller, a first retaining member, a second retaining member, a first biasing member, a second biasing member.

Abstract: An image forming apparatus provided with a hybrid development apparatus having a plurality of toner carriers, the image forming apparatus having the following constitution: a magnet roller incorporated in a developer carrier is rotated and adjusted and fixed at an appropriate magnetic pole position with respect to one toner carrier; the other toner carrier is moved around the magnet roller shaft having a certain gap therebetween and adjusted and fixed at an appropriate magnetic pole position; and gap members are provided on each toner carrier, and the gap members are brought into contact with an image carrier by a guide member and an bias member provided on the image forming apparatus, thereby maintaining a specific development gap.

Abstract: The image forming apparatus is provided with first spacing members having an outer diameter larger than that of a first developing roller, which first spacing members are disposed at two ends of the first developing roller coaxially with the first developing roller, second spacing members having an outer diameter larger than that of a second developing roller, which second spacing rollers are disposed at two ends of the second developing roller coaxially with the second developing roller, a first retaining member, a second retaining member, a first biasing member, a second biasing member.

Abstract: An image forming apparatus provided with a hybrid development apparatus having a plurality of toner carriers, the image forming apparatus having the following constitution: a magnet roller incorporated in a developer carrier is rotated and adjusted and fixed at an appropriate magnetic pole position with respect to one toner carrier; the other toner carrier is moved around the magnet roller shaft having a certain gap therebetween and adjusted and fixed at an appropriate magnetic pole position; and gap members are provided on each toner carrier, and the gap members are brought into contact with an image carrier by a guide member and an bias member provided on the image forming apparatus, thereby maintaining a specific development gap.

Abstract: In a color image forming apparatus in which multiple developing devices housing toners of different colors are held by support members at prescribed locations on a rotatable support unit, a guide member is mounted to one side end of each developing device, engaging members having different configurations are disposed in the guide members, and the multiple developing devices are placed at prescribed locations on a the rotatable support unit by having the engaging members of the guide members mounted to adjacent developing devices engage with each other, enabling each developing device to be placed on the prescribed support member easily while using developing devices having a uniform configuration.

Abstract: In a color image forming apparatus in which multiple developing devices housing toners of different colors are held by support members at prescribed locations on a rotatable support unit, a guide member is mounted to one side end of each developing device, engaging members having different configurations are disposed in the guide members, and the multiple developing devices are placed at prescribed locations on a rotational support unit by having the engaging members of the guide members mounted to adjacent developing devices engage with each other, enabling each developing device to be placed on the prescribed support member easily while using developing devices having a uniform configuration.

Abstract: An image recording device being capable of setting a separating pawl and a print head at an appropriate location by a position changeover operation at one point according to types of recording sheets. The device comprises a sheet feeder having the separating pawl which is switched over to an effecting position or non-effecting position according to types of recording sheets, and a recording section having a print head for recording images onto the recording sheets passed through between a platen and the print head. The distance between the print head and the platen can be changed over, and linking to this changeover operation, the positions of the separating pawl is switched over.