摘要:
An image forming apparatus has a driven image forming part for forming an image. A data supply device has at least one moving portion for supplying data to the image forming apparatus. For example, it may be a hard disk device or a toner sensor having an oscillator, both of which generate noise. A controller actuates the data supply device only during operation of the image forming part, and so the noise is not bothersome to the user.
摘要:
A fixing apparatus for fixing an image on a record sheet .�.comprises.!. .Iadd.includes .Iaddend.a fixing roller in which a heater is disposed, a pressing roller urged against the fixing roller, heat pipes extending in either one of the fixing and pressing rollers in a longitudinal direction thereof, and a temperature detection/control device for detecting .�.to control.!. .Iadd.and controlling .Iaddend.a temperature of the fixing roller. In a typical embodiment, the heat pipes are disposed in the fixing roller to extend both through .�.an imaging portion.!. .Iadd.a sheet passage area.Iaddend., through which a record sheet passes, and through a .�.non-imaging portion.!. .Iadd.sheet non-passage area.Iaddend., through which no record sheet passes and the temperature detection/control device has a temperature detection device for detecting a temperature of the fixing roller in contact with the .�.non-imaging portion.!. .Iadd.sheet non-passage area.Iaddend.. The temperature detection/control device is provided with a temperature regulating device for interrupting electricity to the heater when the fixing roller exceeds a predetermined temperature. In another embodiment, at least one of .Iadd.the .Iaddend.heat pipes is provided in the fixing roller in parallel with an axis of the fixing roller, and a core of the fixing roller is produced by extrusion.
摘要:
A gear molding method for molding a plurality of plastic gears having a different number of ribs without changing costly gates uses a mold having a prescribed gear shape including a prescribed number of grooves substantially radially arranged in the mold. A prescribed number of gates is provided for pouring molten plastic into the mold. When a plastic gear is molded and separated from the mold, a prescribed number of grooves are additionally cut at a middle angular position between each of the pair of neighboring grooves without changing the gates. Then, another gear having increased number of ribs is molded using the same gates.
摘要:
A control method for an image recorder of the type transporting a recording medium substantially vertically from a lower portion to an upper portion inside the recorder. This type of recorder transfers a toner image from a photoconductive element to the medium, and has a toner density sensor for sensing the toner density of a reference density pattern. When the medium jams in the transport path while being transported in the vertical direction, whether it has slipped out of the transported path and dropped to a position where the toner density sensor is located is determined, the sensor is turned on when the operator starts on an operation for removing the medium and when the operator ends such an operation. When the resultant two consecutive outputs from the sensor are different from each other, it is determined that the medium has dropped and the jam is in the vicinity of the sensor.
摘要:
A drive device includes a first shaft, a second shaft disposed at a position deviated from a shaft line of the first shaft, a drive source that drives the first shaft to rotate, and a drive force transmitting unit connecting the first shaft to the second shaft via the drive force transmitting unit to transmit a drive force of the drive source from the first shaft to the second shaft. The drive force transmitting unit includes a reverse preventing mechanism that prevents the first shaft from being rotated in a reverse direction. The reverse preventing mechanism includes a one-way clutch, and the drive force transmitting unit further includes a reduction mechanism that reduces a rotational speed of the one-way clutch to be lower than a rotational speed of the first shaft.
摘要:
A drive device includes a first shaft, a second shaft disposed at a position deviated from a shaft line of the first shaft, a drive source that drives the first shaft to rotate, and a drive force transmitting unit connecting the first shaft to the second shaft via the drive force transmitting unit to transmit a drive force of the drive source from the first shaft to the second shaft. The drive force transmitting unit includes a reverse preventing mechanism that prevents the first shaft from being rotated in a reverse direction. The reverse preventing mechanism includes a one-way clutch, and the drive force transmitting unit further includes a reduction mechanism that reduces a rotational speed of the one-way clutch to be lower than a rotational speed of the first shaft.
摘要:
A plastic gear includes a hub disposed at a core portion, a gear ring disposed concentrically outside of the hub and having a plurality of teeth on an outer surface thereof, and a web that connects the hub and the gear ring. A plurality of ribs is formed on front and rear side surfaces of the web at a prescribed constant angular interval and each of the plurality of the ribs is located substantially at a middle angular position between a pair of neighboring ribs formed on the front side surface.
摘要:
A device for driving a charge roller, charge belt, image transfer roller, image transfer belt or similar contact type charging member used to charge an image carrier of an image forming apparatus in contact with the image carrier. The charging member is driven by an exclusive motor independent of a motor for driving the image carrier. A drive gear and a driven gear are formed of metal and resin, respectively. A flywheel is mounted on a drive roller for causing the charging member to rotate. The drive side has greater rotation energy than the driven roller side. A flywheel is also mounted on the drive gear.
摘要:
A fixing apparatus for fixing an image on a record sheet comprises a fixing roller in which a heater is disposed, a pressing roller urged against the fixing roller, heat pipes extending in either one of the fixing and pressing rollers in a longitudinal direction thereof, and a temperature detection / control device for detecting to control a temperature of the fixing roller. In a typical embodiment, the heat pipes are disposed in the fixing roller to extend both through an imaging portion, through which a record sheet passes, and through a non-imaging portion, through which no record sheet passes and the temperature detection / control device has a temperature detection device for detecting a temperature of the fixing roller in contact with the non-imaging portion. The temperature detection / control device is provided with a temperature regulating device for interrupting electricity to the heater when the fixing roller exceeds a predetermined temperature. In another embodiment, at least one of heat pipes is provided in the fixing roller in parallel with an axis of the fixing roller, and a core of the fixing roller is produced by extrusion.
摘要:
A toner supply device loaded with a removable toner cartridge for supplying a toner to a developing unit of an electrophotographic image forming apparatus. When the toner is fed from the toner cartridge to the toner supply device, an agitating member incorporated in the toner supply device is operated for a predetermined period of time to agitate the toner. The device supplies the toner evenly and rapidly to the developing unit after crushing hard masses of the toner or removing local concentration of the toner which are apt to occur in the cartridge.