Konica Minolta, Inc.

Konica Minolta Business Technologies, Inc.

Takashi Akazawa

Kei Okamura

Takenobu Kimura

Tetsuya Ishikawa

Hiroshi Morimoto

Kazuteru Ishizuka

Kei Yuasa

Yoshiki Nakane

Daiki Yamanaka

Yasuyuki Inada

Natsuko Minegishi

Ryoei Ikari

Natsuko Kawai

Keiji Uchikawa

An evaluation device evaluates an image clarity of a print image. The evaluation device includes: an object that is projected onto a measurement surface of a recording medium; an illuminator that makes the object projected onto the measurement surface; an imager that images the measurement surface on which the object has been projected to obtain image data; and a hardware processor that, based on a distribution of parameters related to a brightness of the image data, quantifies a degree of the image clarity into a numerical value and defines the numerical value as an evaluation value of the image clarity.

Evaluation device and evaluation method

Provided is an image forming apparatus including: a transfer member; a first image carrier on which a first toner image using toner of a first color is formed; a second image carrier which is provided on a downstream side relative to the first image carrier in a moving direction (rotating direction) of the transfer member, and on which a second toner image using toner of a second color is formed; a lubricant supply section that supplies a lubricant to the second image carrier; and a control section that controls a supply amount of the lubricant to the second image carrier in accordance with an overlap amount between the first toner image and the second toner image which are transferred from the first image carrier and the second image carrier to the transfer member.

Image forming apparatus and lubricant supply control method

A system for predicting occurrence of a defective image includes: an input device configured to input image data into an image forming apparatus; and a hardware processor configured to analyze a spatial frequency of gradient distribution of an image in accordance with a size of a density irregularity specific to the image forming apparatus with respect to the input image data and to calculate a probability of a conspicuous density irregularity of the size in regard to the image formed by the image forming apparatus based on the image data with reference to an index of correlation between an analysis result and an evaluation value of the density irregularity.

System for predicting occurrence of defective image and program for predicting occurrence of defective image

A cleaning device comprises: a rotational brush disposed to touch an image holder and a lubricant, the brush which scrapes the lubricant and applies the scraped lubricant to the image holder, the brush including: a rotational axis; and a plurality of looped bristles disposed around the rotational axis, wherein a contact length of the bristles to the lubricant is longer than a contact length of the bristles to the image holder.

Cleaning device and image-forming device

An image forming device including a cleaning member that is made of an elastic material and cleans the surface of the image carrier by contacting with the surface. The drive unit rotates the image carrier in a reverse direction while the cleaning member is contacting with the surface of the image carrier, before the image carrier is rotated in a positive direction for an image formation. The control unit controls the rotation of the image carrier in the reverse direction, in accordance with information indicating a size of a frictional force generated between the cleaning member and the image carrier being rotated.

Control for cleaning image carrier surface in image forming device

Growing community of inventors

Tokyo, Japan

Takashi Akazawa