Patent ID: 8919909
Filing Date: 2014-12-30
Classification: B41J

Abstract:
1. An image forming apparatus comprising: a conveying unit that conveys a recording medium; a liquid droplet ejection head that ejects liquid droplets onto the recording medium which is conveyed by the conveying unit; an emission unit that emits a detection beam, which is used for detecting the recording medium, and a reference beam, which is farther from a conveying surface of the conveying unit than the detection beam, substantially parallel with the conveying surface of the conveying unit, the emission unit being provided upstream of the liquid droplet ejection head in a conveying direction of the recording medium; a light receiving unit that receives the detection beam and the reference beam emitted from the emission unit; and a floating determination unit that determines whether the recording medium is floated, based upon a magnitude of a difference between an amount of light of the detection beam received by the light receiving unit and an amount of light of the reference beam received by the light receiving unit.