Patent ID: 8810810

Claim:
A printing quality inspection apparatus including a light irradiation device which irradiates with light at an inspection position on a member to be printed including a second sheet member having an image printed thereon and a diffusely reflecting surface, and a first sheet member having an image printed thereon and a specularly reflecting surface, an image capture device which receives light which is emitted by the light irradiation device and passes through the member to be printed, thereby capturing the image on the member to be printed, a diffusely reflecting plate which diffuses and reflects incident light opposed to the light irradiation device on an opposite side of a light incident path defined from the member to be printed to the image capture device, and a determination device which compares an image capture signal output from the image capture device and a reference signal stored in advance to inspect quality of the image printed on the member to be printed, wherein when the member to be printed is the second sheet member, the light emitted by the light irradiation device is diffusely reflected by the second sheet member and enters the image capture device, and when the member to be printed is the first sheet member, the light emitted by the light irradiation device is, after diffusely reflected by the diffusely reflecting plate, specularly reflected by the first sheet member and enters the image capture device, wherein the image capture device is arranged at an upper position on an upstream side with respect to the inspection position in a conveyance direction of the member, the light irradiation device is arranged at an upper position further along the upstream side with respect to the image capture device in a conveyance direction of the member, the diffusely reflecting plate is arranged at an upper position on a downstream side with respect to the inspection position in a conveyance direction of the member and the light incident path defined from inspection position to the image capture device is set to be tilted by a predetermined angle toward the upstream side with respect to a direction perpendicular to the conveyance direction of the member.