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US 8,810,810 B2Granted
Printing quality inspection apparatus
AssigneeKomori Corporation
InventorKentaro Ohama
Life of this patent
Estimating the term…
Abstract
This invention discloses a printing quality inspection apparatus including a light irradiation device, an image capture device, a diffusely reflecting plate, and a determination device. When a member to be printed is a first sheet member, light emitted by the light irradiation device is diffusely reflected by the first sheet member and enters the image capture device. When the member to be printed is a second sheet member, the light emitted by the light irradiation device is diffusely reflected by the diffusely reflecting plate, is specularly reflected by the second sheet member, and enters the image capture device.
Claims9
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.
7 more elements
A printing quality inspection apparatus including
- a light irradiation device which irradiates a transparent sheet member having an image printed thereon with light,
- an image capture device which receives light which is emitted by the light irradiation device and passes through the transparent sheet member, thereby capturing the image on the transparent sheet member,
- 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 transparent sheet member,
- 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
- one of a specularly reflecting film and a specularly reflecting member which is provided at an opposite side of the image capture device with respect to a conveyance path of the transparent sheet member, wherein
- the light emitted by the light irradiation device passes through the transparent sheet member upon being diffusely reflected by the diffusely reflecting plate, is specularly reflected by one of the specularly reflecting film and the specularly reflecting member, and enters the image capture device,
- the image capture device is arranged at an upper position on an upstream side with respect to an inspection position in a conveyance direction of the member to be printed,
- the light irradiation device is arranged at an upper position further along the upstream side with respect to the image capture device in the conveyance direction of the member to be printed, and
- 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 to be printed.
6 more elements
Dependencies are inferred from the claim text.