Image-forming device with a density measuring unit

Details Image-forming device with a density measuring unit Image-forming device with a density measuring unit

2011-03-22

2011-03-22

Grainger, Quana M (Department: 2852)

Electrophotography

Control of electrophotography process

Forming test image

Reexamination Certificate

active

07912393

ABSTRACT:
An image-forming device includes an image-forming unit, a test image memory, a test image forming unit, a density measuring unit, an abnormality determining unit, a test image re-forming unit, and a density re-measuring unit. The image-forming unit forms an image on a recording medium based on inputted image data. The test image memory stores image data of test image used for calibrating density of image to be formed by the image-forming unit. The test image forming unit controls the image-forming unit to form the test image by reading image data for test image stored in the test image memory and outputting the image data to the image-forming unit. The density measuring unit measuring the density of the test image that the image-forming unit forms on the recording medium. The abnormality determining unit compares the density of test image measured by the density measuring unit with prescribed values pre-stored in association with the test images to determine whether the measured density is abnormal. The test image re-forming unit controls the image-forming unit to re-form test image determined to be abnormal by the abnormality determining unit on the recording medium by outputting image data for the test image determined to be abnormal to the image-forming unit. The density re-measuring unit measures the density of the test image that the image-forming unit re-forms on the recording medium.

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Computer translation of JP08-076531A, Mar. 22, 1996.

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