# US 2008/0187380 A1 · Image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187380 A1 - Document ID: US20080187380A1 - Status: Published application - Kind: A1 - Application number: 11/872,805 - Filed: 2007-10-16 - Published: 2008-08-07 - Earliest claimed: 2006-11-30 - Assignees: Fuji Xerox Co., Ltd. - Inventors: Takehiro FUKUDA - Web page: https://patentgrep.com/patent/US20080187380A1 ## CPC - G03G 15/6579: {Refeeding path for composite copying} - G03G 15/234: {by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters} - G03G 15/6552: {Means for discharging uncollated sheet copy material, e.g. discharging rollers, exit trays} - G03G 21/1647: {Mechanical connection means} - G03G 21/1695: {for paper transport} - G03G 2215/00438: Inverter of refeeding path - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An image forming apparatus includes: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a discharging member that discharges the recording medium on which the image is formed by the image forming section; a driving source that normally and reversely rotates the discharging member; and a both-face printing assembly body that returns the recording medium pulled-back by reversely rotating the discharging member to the image forming section, the driving source and the both-face printing assembly body being separately freely attached and detached with respect to the image forming apparatus main body. ## Claims ### Claim 1 An image forming apparatus comprising: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a discharging member that discharges the recording medium on which the image is formed by the image forming section; a driving source that normally and reversely rotates the discharging member; and a both-face printing assembly body that returns the recording medium pulled-back by reversely rotating the discharging member to the image forming section, the driving source and the both-face printing assembly body being separately freely attached and detached with respect to the image forming apparatus main body. ### Claim 2 An image forming apparatus comprising: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a first driving source that is arranged within the image forming apparatus main body; a discharging member that is rotated in a normal direction by the first driving source, and that discharges the recording medium on which the image is formed by the image forming section; a driving source assembly body that includes a second driving source for normally and reversely rotating the discharging member; and a both-face printing assembly body that inverts the recording medium pulled-back by reversely rotating the discharging member, and that returns the recording medium to the image forming section, the driving source assembly body and the both-face printing assembly body being separately freely attached and detached with respect to the image forming apparatus main body. ### Claim 3 (depends on 2) The image forming apparatus as claimed in claim 2, further comprising: a switching unit that performs a switching operation such that the first driving source is connected to the discharging member in a case where the driving source assembly body is not mounted to the image forming apparatus main body, and the second driving source is connected to the discharging member in a case where the driving source assembly body is mounted to the image forming apparatus main body. ### Claim 4 (depends on 3) The image forming apparatus as claimed in claim 3, wherein the switching unit performs the switching operation in accordance with the attachment and detachment of the driving source assembly body. ### Claim 5 (depends on 2) The image forming apparatus as claimed in claim 2, wherein the discharging member has a circumferential speed of a reverse rotating direction derived from the second driving source, the circumferential speed of the reverse rotating direction being faster than the circumferential speed of a normal rotating direction of the discharging member deriving from one of the first driving source and second driving source. ### Claim 6 (depends on 2) The image forming apparatus as claimed in claim 2, wherein the image forming apparatus main body has a first side face and a second side face opposed to the first side face, and the first driving source is arranged on a side of the first side face, and the driving source assembly body is arranged on a side of the second side face. ### Claim 7 (depends on 2) The image forming apparatus as claimed in claim 2, wherein the image forming apparatus main body has a first side face and a second side face opposed to the first side face, and the first driving source and the driving source assembly body are arranged on one of a side of the first side face and a side of the second side face. ### Claim 8 (depends on 7) The image forming apparatus as claimed in claim 7, further comprising: a driving control section that controls operations of the first driving source and second driving source, wherein the driving control section is arranged on the same side of side face on which the first driving source and the driving source assembly body of the image forming apparatus main body are arranged. ### Claim 9 (depends on 2) The image forming apparatus as claimed in claim 2, wherein the both-face printing assembly body comprises: a conveying member for both faces that conveys the recording medium; and a third driving source that operates the conveying member for both faces. ### Claim 10 (depends on 9) The image forming apparatus according to claim 9, wherein a conveying speed of a reverse rotating direction of the recording medium using the second driving source is faster than the conveying speed of the recording medium using the third driving source. ### Claim 11 An image forming apparatus comprising: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a first driving source that is arranged within the image forming apparatus main body; a discharging member that is rotated in a normal direction by the first driving source, and discharging the recording medium on which the image is formed by the image forming section; a driving source assembly body that includes a second driving source for normally and reversely rotating the discharging member; a both-face printing assembly body that inverts the recording medium pulled-back by reversely rotating the discharging member, and that returns the recording medium to the image forming section; and a switching unit that performs a switching operation such that the first driving source is connected to the discharging member in a case where the driving source assembly body is not mounted to the image forming apparatus main body, and the second driving source is connected to the discharging member in a case where the driving source assembly body is mounted to the image forming apparatus main body. ### Claim 12 (depends on 11) The image forming apparatus as claimed in claim 11, wherein the switching unit performs the switching operation in accordance with the attachment and detachment of the driving source assembly body. ### Claim 13 An image forming apparatus comprising: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a discharging member that discharges the recording medium on which the image is formed by the image forming section; a driving source assembly body that includes a driving source for normally and reversely rotates the discharging member; and a both-face printing assembly body that inverts the recording medium pulled-back by reversely rotating the discharging member, and that returns the recording medium to the image forming section, the driving source and the both-face printing assembly body being separately mounted to the image forming apparatus main body. ### Claim 14 An image forming apparatus comprising: an image forming apparatus main body; an image forming section that is arranged within the image forming apparatus main body, and that forms an image in a recording medium; a first driving source that is arranged within the image forming apparatus main body; a discharging member that is rotated in a normal direction by the first driving source, and that discharges the recording medium on which the image is formed by the image forming section; a driving source assembly body that includes a second driving source for normally and reversely rotating the discharging member; and a both-face printing assembly body that inverts the recording medium pulled-back by reversely rotating the discharging member, and that returns the recording medium to the image forming section, the driving source and the both-face printing assembly body being separately mounted to the image forming apparatus main body.