Mita Industrial Co., Ltd.

Noritaka Okazaki

Ryuji Wataki

Shigeo Fujita

Michio Uchida

Yuzuru Nanjo

Yuki Ito

Eiji Nimura

Yuki Itoh

A multi-directional driving mechanism includes a moving plate supported rotatably on a supporting shaft and having an input portion and a plurality of output portions, a solenoid coupled to the input portion of the moving plate for causing the moving plate to pivot through a predetermined angle, and a plurality of coupling members each having one end coupled to the plurality of output portions provided on the moving plate. A transfer device for an image forming machine has contacting/separating mechanisms for moving a transfer belt unit, a moving mechanism for moving a cleaning blade, and the multi-directional driving mechanism, the other end each of the plurality of coupling members of the multi-directional driving mechanism being coupled to the contacting/separating mechanisms or the moving mechanism.

Multi-directional driving mechanism and transfer device for an image

A transfer device for an image forming machine has a belt unit including a driving roller, a driven roller disposed at a distance from the driving roller, a transfer belt looped between the driving roller and the driven roller, and a transfer roller disposed opposite an image bearing member with the transfer belt interposed therebetween; a contacting/separating device for moving the belt unit between a transfer position and a non-transfer position; and a voltage source for applying a predetermined voltage onto the transfer roller. The transfer roller is disposed apart from the transfer belt, and when the belt unit is brought to the transfer position by the contacting/separating device, the transfer roller presses the transfer belt against the image bearing member. Another embodiment includes a cleaning blade disposed apart from the transfer belt, and which in the transfer position contacts the transfer belt.

Transfer device for an image forming machine

An image forming machine equipped with a transfer belt unit includes a safety detecting means for detecting the completion of setting of an opening/closing member constituting the image forming machine, and a controlling means for controlling the operation of a driving means for a driving roller on the basis of a signal from the safety detecting means. When the safety detecting means signals the completion of the setting after signaling the incompletion of the setting, the controlling means controls the driving means so as to perform a reverse driving, thereby driving the driving roller reversely by a predetermined amount.

Image forming machine

A transfer device of an image forming machine has a belt unit comprising a pair of supporting plates disposed with a predetermined spacing, a driving roller journaled rotatably at one end portion of the pair of supporting plates, a driven roller journaled rotatably at the other end portion of the pair of supporting plates with a predetermined spacing from the driving roller, a transfer roller disposed between the driving roller and the driven roller, journaled rotatably on the pair of supporting plates, and given a predetermined voltage, and a transfer belt looped among the driving roller, the driven roller and the transfer roller, and disposed opposite an image bearing member. The transfer belt of the belt unit is formed so as to have a width larger than the spacing between the pair of supporting plates, and is disposed such that its side end portions surround at least part of the pair of supporting plates.

Transfer device of image forming machine

A transfer device for an image forming machine has a driving roller, a driven roller disposed at a distance from the driving roller, a transfer belt extending between the driving roller and the driven roller, a transfer roller disposed opposite an image bearing member, with the transfer belt interposed therebetween and pressing the transfer belt against the image bearing member, and a voltage source for applying a predetermined voltage onto the transfer roller. The transfer roller consists of a rotating shaft and a roller portion mounted on the rotating shaft, and the hardness of the roller portion is set to result in a compression of 0.45 to 2.00 mm at a linear pressure of 3 g/cm. The volume resistivity of the roller portion of the transfer roller is set at 10.sup.2 to 10.sup.9 ohm-centimeters.

Transfer device for image forming machine

A cleaning device for cleaning an endless transfer belt which is made of elastic material and stretched between a first roller and a second roller, one of the two rollers being adapted for driving the belt, the transfer belt being able to come into contact with a copy sheet on one stretch side of the transfer belt to convey the copy sheet in a direction from the first roller to the second roller. The cleaning device is provided with a cleaning blade member for removing toner from the belt. The cleaning blade member is disposed on the other stretch side of the transfer belt and near the second roller, being pressed perpendicularly against an outside surface of the belt, and having a leading end portion which is flexed and capable of coming into a line contact with the belt over an entire width of the belt when the belt is driven. The amount of pressing force of the blade against the belt will be adjusted depending on the sensed temperature of the belt.

Cleaning device for a transfer belt of an image forming apparatus

A transfer plate which also serves as a sheet guide plate is pushed by a torsion spring. A minimum gap less than 0.2 mm between a guide surface of the transfer plate and the surface of a photoreceptor drum is maintained to be smaller than the thickness of a transfer sheet by a spacer member provided on the guide surface. When the sheet passes through the gap between the drum surface and the guide surface, the transfer plate is pushed down by the sheet and the sheet is pressed onto a toner image formed on the drum surface with an appropriate pressure by the pushing force of the torsion spring. At this time, a transfer voltage is applied to the transfer plate, so that the toner image on the drum surface is transferred to the sheet.

Image transfer unit for image forming apparatus

A scanning apparatus of a copying machine includes a first moving frame and a second moving frame constituting a movable optical system for reading an original image; a toothed belt suspended between a pair of pulleys such that the toothed belt is endlessly movable; the first moving frame being fixed; a second moving frame driving pulley installed on the second moving frame and which is driven by the toothed belt; a friction roller which rotates in a body with the second moving frame driving pulley; and a stationary friction plate installed so as to be brought in contact with the friction roller. The scanning apparatus has a simple construction, and a stable and high performance in reading an original image can be obtained.

Scanning apparatus for reading an original image

A toothed-belt fixing mechanism allows an end portion of a toothed-belt to be inserted between a toothed-pulley rotatable only in one direction and a guide member positioned so that a predetermined gap is formed between the guide member and peripheral teeth of the toothed-pulley. Teeth of the toothed-belt engage with the peripheral teeth of the toothed-pulley.

Growing community of inventors

Osaka, Japan

Noritaka Okazaki