JP2005292431A5 - - Google Patents

Claims (9)

In an image forming apparatus comprising: a fixing unit that fixes an unfixed image on a recording medium; and a detection unit that detects an image on the recording medium fixed by the fixing unit .
A conveyance guide that holds the detection unit and guides the conveyance of the recording medium so that a distance between the detection unit and the recording medium is constant; the conveyance guide is capable of advancing and retreating to a conveyance path of the recording medium; The image forming apparatus , wherein the conveyance guide is in contact with a recording medium . The transport guide is a first transport guide, and has a second transport guide on the opposite side of the first transport guide via the transport path, and when the first transport guide enters the transport path, The image forming apparatus according to claim 1, wherein the recording medium is sandwiched between the first conveyance guide and the second conveyance guide. The image forming apparatus according to claim 1, wherein the first conveyance guide includes a roller that contacts the recording medium. The image forming apparatus according to claim 3, wherein the second conveyance guide includes a roller facing the roller of the first conveyance guide. The image forming apparatus according to claim 4, wherein the roller of the second conveyance guide is driven. The image forming apparatus according to claim 1, wherein the conveyance guide advance / retreat direction is a direction orthogonal to a conveyance direction of the recording medium. Wherein upstream of said feed roller in the conveying direction of the feed roller and, that put the transport path recording medium for conveying the record medium in the conveyance direction downstream side of the portion by Liqui recording medium having the conveyance guide in the conveying path and a recording medium detection means for detecting the presence or absence of record media that put the transport path, the detection signal of the recording medium detecting means, at a timing at which the conveying direction leading end of the record medium are held to the feed roller the conveying guide is advanced to the conveying path, records at a timing which has passed through a facing portion that retracts the said conveyance guide image formation according to claim 1 wherein the transport direction rear end to the conveying guide of medium apparatus. A recording medium detection means for detecting the presence or absence of put that record medium to the conveying path record medium conveyance direction upstream side than the portion having the conveyance guide in the conveying path, the detection signal of the recording medium detecting means Accordingly, the conveyance guide is caused to enter the conveyance path before the image on the recording medium reaches the reading position of the detection means, and the conveyance guide is retracted after the detection by the detection means. Item 2. The image forming apparatus according to Item 1 . It said sensing means, the image forming apparatus according to claim 1, wherein the detecting the density or chromaticity of an image on the recording medium.