Patent ID: 8320815

Claim:
An image forming device, comprising: a plurality of medium feed units configured to feed a recording medium on respective carrying routes, the plurality of medium feed units comprising: a first medium feed unit configured to feed the recording medium supplied from a manual feed port on a first carrying route; and a second medium feed unit configured to pick up the recording medium from a medium receptacle and feed the picked-up recording medium on a second carrying route; an image forming unit configured to form an image on the recording medium fed from one of the plurality of medium feed units; a first roller provided on a common route of the first and second carrying routes, the first roller being configured to rotate at a first circumferential velocity and carry, to the image forming unit, the recording medium fed from one of the plurality of medium feed units; a carrying belt disposed downstream relative to the first roller on the common route; and a control unit configured to control the first circumferential velocity of the first roller depending on from which of the plurality of medium feed units the recording medium is fed, wherein the image forming device further comprises a second roller provided at an upstream side of the first roller on the second carrying route, the second roller being configured to rotate at a second circumferential velocity higher than the first circumferential velocity, wherein the control unit controls the first circumferential velocity of the first roller to be higher when the recording medium is fed from the first medium feed unit than when the recording medium is fed from the second medium feed unit, such that a carrying speed of the recording medium through the first roller is at a single predetermined value when the recording medium is fed from the first medium feed unit or from the second medium feed unit, the first circumferential velocity being controlled to be equivalent to the single predetermined value, and lower than the second circumferential velocity, when the recording medium is fed from the first medium feed unit, the first circumferential velocity being controlled to be lower than the single predetermined value, and the second circumferential velocity, when the recording medium is fed from the second medium feed unit.