摘要:
Embodiments in accordance with the present invention suppress an adverse influence on a pattern of a magnetic disk due to its rotational jitter and write the pattern at more accurate timing. In accordance with one embodiment, a hard disk controller/microprocessing unit (HDC/MPU) controls a clock frequency of a data clock generation circuit so that a rotational jitter of the magnetic disk be compensated when writing and reading user data. The HDC/MPU expects a detection timing of next adjacent servo sector using an error between an actual detection timing and an expected detection timing of a servo sector which has already been detected. The HDC/MPU controls the clock frequency using the expected timing and writes and reads user data between current servo sector and next adjacent servo sector according to the clock signal.
摘要:
A carrier removing apparatus, including: an electrode, having a plurality of openings through which a carrier passes, disposed to oppose an image carrier, and a power source to apply a voltage onto the electrode so as to separate the carrier on the image carrier from the image carrier, wherein the electrode has a surface along a surface of the image carrier.
摘要:
Embodiments in accordance with the present invention help a disk drive to effectively cope with a data address mark detection error. In one embodiment, a data sector is provided with plural data address marks and an read/write (RW) channel reads out the data sector using part of those data address marks. Each divisional section of a split sector has two data address marks and the RW channel uses one of the two data address marks. A data address mark to be used is specified by a register. When an error occurs in detecting a data address mark, its position is stored in a register. Based on the error position, an error recovery processing section stores, in the register, a data address mark to be used in a next retry.
摘要:
In this invention, the relationship between the attachment position of a sensor and the formation positional shift of a color image is checked by moving a color misregistration detection sensor along an attachment position candidate line that is defined in advance in a direction perpendicular to the rotational direction of an endless-belt-shaped transfer body. A specific attachment position on the sensor attachment position candidate line, at which color misregistration of the color image at a side edge portion of the transfer body becomes equal to the maximum value of color misregistration at a portion except the side edge portion, is found. The sensor is fixed at a position that satisfies the specific attachment position and opposes the color image formation surface of the transfer body. Accordingly, the image forming apparatus is controlled to correct color overlay on the basis of the detection signal of the color image by the sensor. As a result, the color misregistration on the entire color image formation surface can be minimized. Additionally, a high-quality color image with minimum color misregistration can be formed.
摘要:
The present invention is to clear the difficulty in determining the progress of the decomposition reaction of PCBs carried out by a conventional device for decomposing PCBs, and to provide a system for treating PCBs to render them harmless, capable of continuously determining the progress of the decomposition reaction of PCBs at real time by using a predetermined amount of a reaction solution taken out while the decomposition reaction of the PCBs is proceeding.The quantity of the polychlorobiphenyls existing in a polychlorobiphenyl-containing liquid can be determined by the system for treating polychlorobiphenyls to render them harmless according to the present invention in the following manner: a polychlorobiphenyl-containing liquid is irradiated with exciting light of from 400 nm to shorter than 450 nm, that can excite the polychlorobiphenyls, or with exciting light of from 300 nm to shorter than 400 nm, that can excite the decomposition products of the polychlorobiphenyls, and the intensity of the emitted light is measured at a wavelength between 450 nm and 600 nm, both inclusive; and the quantity of the existing polychlorobiphenyls is determined based on one of the values measured, or based on the ratio between the two values measured. The progress of the decomposition reaction of the polychlorobiphenyls can thus be determined, and the polychlorobiphenyls can be fully and sufficiently decomposed.
摘要:
The present invention realizes an image forming apparatus which is equipped with a carrier recovery section of simple configuration and for which maintenance is not required, the apparatus includes: a photoconductive drum; a developing device to develop a latent image formed on the photoconductive drum by a two-component developer containing a toner and a magnetic carrier, and a carrier recovery section which is equipped with a recovery roller, wherein the carrier recovery roller includes a rotatable sleeve, and a magnet roller that is installed inside the sleeve and provided with a plurality of fixed magnetic poles including a main pole to recover the magnetic carrier adhered onto the photoconductive drum and a separating pole to separate the magnetic carrier from the recovery roller, wherein a separating member is disposed at such a position that is opposite to the sleeve at a prescribed distance in a non-contact state.
摘要:
The laser scanning optical device comprises: a light source; a collimator lens; a light source holder; a lens holder; a light source unit holder; a first rotation axis; and a second rotation axis. The light source includes a plurality of light emitting points. The collimator lens converts diverging rays irradiated from the light source into parallel rays. The light source holder holds the light source. The lens holder holds the collimator lens. The light source unit holder holds the light source holder and the lens holder. The first rotation axis rotates the collimator lens with respect to an ideal optical axis. The second rotation axis rotates the light source unit holder while constantly maintaining a positional relationship between the light source holder and the lens holder.
摘要:
An image forming apparatus including a photoreceptor having an image carrying surface, first and second exposing devices to expose the image carrying surface to form first and second latent images, and first and second developing devices to develop the first and second latent images to form first and second toner images on the image carrying surface. The first exposing device has a light source which emits a light beam, a deflector which deflects the light beam on the image carrying surface to form a scanning line, a first optical system to focus the light beam, and a first adjustor which adjusts an alignment between the first optical system and the image carrying surface for correcting variation of lateral magnification in the primary scanning direction of the optical system so that the first toner image and the second toner image are superposed on a recording sheet.
摘要:
A scanning optical system is provided with a plurality of scanning optical devices each including a light source to emit a light beam, a collimator lens into which the light beam emitted from the light source enters, a deflector to deflect the light beam passing through the collimator lens in a main scanning direction, an image forming lens to focus the light beam coming from the deflector onto a scanned surface, and a base plate on which the light source, the collimator lens, the deflector and the image forming lens are fixed. The plurality of scanning optical devices are piled up in a sub-scanning direction perpendicular to the main scanning direction in such a manner that each base plate is substantially parallel to other base plates, and the scanning optical system is further provided with a plurality of link members to connect two neighboring base plates independently of other base plates.
摘要:
A developing device, includes a developer agitating member, an upstream side developing roller, and a downstream side developing roller; wherein a toner in a developer handed over from the upstream side developing roller to the downstream side developing roller has a volume average particle size larger than a volume average particle size of the toner in the developer conveyed by the upstream side developing roller to the facing position between the upstream side developing roller and a photoreceptor drum.