Hewlett-packard Development Company, L.P.

Samsung Electronics Co., Ltd.

Koji Miyake

Satoru Hori

Kensuke Nakajima

Yuji Aoshima

Shun Ikeura

Satoru Furuya

Takayuki Wakai

Naoyuki Iwata

An imaging system includes a transfer belt that is rotatable, a transfer roller that contacts the transfer belt, and a conductive device that contacts a surface of the transfer roller, to supply a bias to the transfer roller. The transfer roller has a hollow portion.

Imaging system with transfer roller

An imaging system includes: a steering roller located between a first belt roller and a second belt roller, that is inclinable around a fulcrum; and a sensor to detect an amount of displacement of the steering roller due to an inclination of the steering roller. A controller may output a command signal when the amount of displacement of the steering roller exceeds a reference value.

Imaging system

An imaging system includes a transfer roller having a surface to transfer a toner image onto a print medium during a printing operation of the imaging system, a conductive device to contact the surface of the transfer roller, a power source electrically connected to the conductive device, a resistance measurement device, and a controller. The transfer roller rotates according to a printing speed of the printing operation. The power source supplies a bias to the transfer roller through the conductive device during the printing operation. The resistance measurement device measures an electrical resistance of the print medium. The controller reduces the printing speed based on the electrical resistance measured by the resistance measurement device.

Imaging system with resistance measurement of print medium

An imaging apparatus includes a transfer belt, a transfer roller, a conductive roller, and a power source. The transfer roller includes a metal shaft electrically floating during an imaging operation. The conductive roller has an electrical resistance lower than an electrical resistance of the transfer roller. The power source is electrically connected to the conductive roller, and the power source includes a first supply path to supply a first electrical bias to the conductive roller during an imaging operation and a second supply path to supply a second electrical bias to the transfer roller during a cleaning operation.

Imaging apparatus including power source to supply electrical bias to transfer roller and conductive device

An imaging system includes an endless belt, a tensioning system that applies tension to the endless belt, a contact member that engages with the endless belt, and a detector that detects slack at a part of the endless belt. A controller causes the contact member to be separated from the endless belt so that the tensioning system reduces the slack of the endless belt in response to the detector detecting the slack.

An imaging system includes an endless belt which includes a first surface and a second surface and a steering assembly which is tiltable to adjust a position of the endless belt. The steering assembly includes a first member that is adjacent to the first surface of the endless belt and a second member that is adjacent to the second surface of the endless belt, to press the endless belt against the first member.

Tiltable steering assembly to adjust position of endless belt in imaging system

An imaging system includes a steering roller and a positioning mechanism. The steering roller extends along a longitudinal direction, and being tiltable about a fulcrum to adjust an alignment position of an endless belt. The positioning mechanism is coupled to the steering roller, to position an adjustable position of the fulcrum of the steering roller, along the longitudinal direction of the steering roller. The positioning mechanism includes a guide that extends along the longitudinal direction of the steering roller, and a protrusion that engages with the guide, and that is located at the adjustable position of the fulcrum.

Imaging system including a steering roller tiltable about a fulcrum

An imaging system includes a pair of belt rollers, a steering roller, a wheel, and a link mechanism. The pair of belt rollers includes a first roller and a second roller to drive an endless belt along a belt path. The steering roller is between the first roller and the second roller. The steering roller is tiltable to engage the endless belt. The wheel is at an end of the first roller in abutment with an edge of the endless belt, to move in an outward direction along a rotation axis of the first roller, when the endless belt shifts away from the belt path toward the wheel. The link mechanism is between the wheel and the steering roller to tilt the steering roller in response to a sliding movement of the wheel in the outward direction, to urge the endless belt to shift toward the belt path.

Belt driving device with tiltable steering member

A belt driving device to drive an endless belt, includes a drive roller and a suspension roller which extend in a first direction and face each other in a second direction. The belt driving device includes a steering roller located between the drive roller and the suspension roller in a tiltable manner. A pulley (or wheel) is located at an end portion of the steering roller. The belt driving device includes a link mechanism which presses the end portion of the steering roller to tilt the steering roller with the movement of the pulley (or wheel).

Belt driving device with steering roller

An image forming apparatus includes a rotatable cylindrical component to be cleaned, and a bar brush having a base substrate and bristles. The base substrate of the bar brush is located at a fixed position relative to the component to be cleaned. The bristles extend from the base substrate to contact the component to be cleaned. The bristles have free ends that form a tip end surface of the bar brush. The tip end surface has a curved shape that conforms with a surface of the component, when the bristles are not in contact with the surface to be cleaned.

Image forming apparatus

An imaging system comprises a pair of belt rollers to drive an endless belt along a belt path, the pair of belt rollers comprising a first roller and a second roller. A steering roller is located between the first roller and the second roller. The steering roller is tiltable to engage the endless belt. A wheel is located at an end of the first roller in abutment with an edge of the endless belt, to move along a rotation axis of the first roller, in an outward direction, when the endless belt shifts toward the wheel. A link mechanism transfers a movement of the wheel in the outward direction, to a tilting of the steering roller, in order to urge the endless belt to shift away from the wheel toward the belt path.

An electrophotographic image forming apparatus includes a photoreceptor forming an electrostatic latent image on a surface thereof, a charging roller being in contact with the photoreceptor to uniformly charge the surface thereof, a developing device forming a toner image on the photoreceptor, and a cleaning device cleaning contaminants on a surface of the charging roller, in which the charging roller has a conductive elastic layer formed around an axis and a direction of polishing marks on the surface of the charging roller is in a circumferential direction.

Electrophotographic image forming apparatus

A roll-type charging device contacts an image receptor serving as a body to be charged and is capable of rotating due to rotation of the image receptor. The apparatus includes a hollow roll having a cylindrical shape and formed of a hollow elastic member and flanges having rotation axes and formed of elastic members, the flanges inserted into two ends of the hollow roll to increase an inner diameter of the hollow roll.

Growing community of inventors

Yokohama, Japan

Koji Miyake