Canon Kabushiki Kaisha

Victor Company of Japan, Limited

Takashi Kitamura

Katsumi Masaki

Yasushi Sato

Takashi Nakano

Kazuhiro Hirayama

Asao Watanabe

Taisuke Tokiwa

Naoto Kawamura

Koichi Masegi

Michio Ito

Hideaki Sato

Kazuo Hoshito

Hisashi Sakamaki

Kazuo Minoura

Junichi Kimizuka

Kazuya Matsumoto

Kiyonobu Endo

Yuji Nishigaki

Shinichi Ohta

Isao Hakamada

Yoshioki Hajimoto

Masanao Kasai

Junji Ichikawa

Masaaki Ishii

Haruo Uchiyama

Hitoshi Fujino

Hitoshi Hanadate

A recorder has a beam generator for generating a beam to form a dot image on a record medium. The beam generator has first and second beam generation sources to generate first and second beams and forms each dot by using both of the first and second beams.

Dual beam recorder

This specification discloses a both-side recording apparatus in which a sheet conveyed by first recording means for recording an image on a first surface of the sheet is reversed by sheet reversing means and directed to second recording means for recording an image on a second surface of the sheet, whereby images are recorded on the first and second surfaces of the sheet.

Both-side recording system

A semiconductor laser device has a high switching speed and low cost, and comprises a common electrode, on the surface of a P-type semiconductor wafer forming plural light sources. The semiconductor laser device is further featured by having grooves provided on said semiconductor wafer to allow independent drive of said light sources and to reduce the distance between the light-emitting points of the light sources.

Semiconductor laser device with plural light sources

An information output device constructed with a storing device which stores therein information code signals and instruction signals, a first pattern generator which generates a pattern in the first density, a second pattern generator which generates a pattern in the second density, a reader which reads out the information code signal and instruction signal from the storing device, a device to apply the information code signal to the first pattern generator and sequentially read out the same with the first frequency, when the instruction signal read out of the reading device instructs the first density, and to apply the information code signal to the second pattern generator and sequentially read out the same with the second frequecy different from the first frequency, when the instructions signal instructs the second density, and an output device which produces an output pattern read out of the applying and reading device in the form of visible information.

Information output device for recording information with varied

A collator has a common light-emitting element for emitting light to a photosensitive element for detecting an empty bin and to a photosensitive element for detecting a full bin; or a common photosensitive element for receiving light emitted from a light-emitting element for detection of an empty bin and from a light-emitting element for detection of a full bin. The collator allows correct detection of an empty bin and a full bin with fewer members and with simple construction. After detection of a full bin, some sheets already printed by a high-speed printer or the like can still be stacked in a space above the full bin level. Each bin also incorporates a bin inlet sensor to prevent erratic detection of a full bin or an empty bin when a sheet is in the process of being inserted in the bin through the inlet.

Collator with photoelectric bin fill detection

Electrostatic recording apparatus forming small non-recording regions in a recording field includes a beam generator generating a beam modulated with a modulation signal, an irradiating unit directing the beam to a photosensitive member to form an electrostatic image, a determination circuit determining when the electrostatic image formed by the beam on the photosensitive member exceeds a predetermined size, an interruptor for intermittently interrupting the emission of the beam at small time intervals, and an actuating circuit actuating the interruptor when the determination circuit determines when the electrostatic image exceeds the size.

Electrostatic recording apparatus forming small non-recording regions in

A novel method and apparatus for electrophotography is disclosed which enables selection the mode of image formation among positive-positive, negative-positive and combinations thereof without any need of changing the polarity of developing toner. The present invention is made on the basis of a known electrophotographic system in which a photosensitive member composed of essentially an electrically conductive substrate, a photoconductive substance layer and an insulating surface layer and which comprises the steps of charging the insulating surface layer, image-wise exposing it to light so as to form a first image almost simultaneously with or some time after the charging step, subjecting it to corona discharge with nearly simultaneous image-wise exposure so as to form a second image and uniformly exposing the whole surface of the photosensitive medium to light so as to form an electrostatic latent image corresponding to a composite image resulting from the first and second images. According to the invention the first and second images to be formed are identical with each other and either one of the two images is selectively exposed to obtain the desired image.

Method and apparatus for electrophotography capable of changing over

A method in which, rearwardly of an array-like light source having a plurality of semiconductor lasers arranged in an array, a light detector for detecting the rearwardly emitted beams from the semiconductor lasers is provided and the peak value of each of the semiconductor lasers is detected by the light detector so that the peak values of the semiconductor lasers can be made equal to one another, whereby the quantity of light from each of the semiconductor lasers is regulated.

Method of and apparatus for regulating the quantity of light of an

A dot recording apparatus has a semiconductor light source array having two light sources for emitting light beams for forming dots of different diameters. Both light sources can be driven simultaneously, or only one light source can be driven. A laser driver circuit can be driven according to the on/off operation of a switch. The on/off operation of the switch can be performed manually or in accordance with operation of an automatic control circuit. Narrowing of thin lines in the main scanning direction or in the subscanning direction can be prevented. An image of good resolution can be formed even if the scanning line pitch is increased.

Dot recording apparatus

This invention provides an optical scanning apparatus having a compact structure which includes a light-source portion consisting of an array of aligned light sources, a collimating portion for collimating the beams from the light source portion, a deflecting portion for deflecting the collimated beams from the collimating portion, and an imaging portion for causing the deflected beams to form an image on a surface to be scanned, said collimating portions including an exit pupil which is positioned extremely close to the deflecting surface of said deflecting portion.

Optical scanning apparatus having an array of light sources

There is disclosed an output device for displaying alphanumeric information as well as graphic pattern, which comprises a first dot signal generator for alphanumeric displaying, a second dot signal generator for graphic-pattern displaying and an output unit for deriving the first and second signals to display the alphanumeric and graphic pattern information.

Output device for providing information by scan

This invention provides a process for making image overlay through the steps constituting an electrophotographic process, and also an apparatus adapted for conducting such process. The process, based on an electrophotographic process utilizing a three-layered photosensitive member having an insulating cover layer, comprising exposing the photosensitive member to a first image-forming irradiation to be overlaid substantially simultaneously with or subsequent to a charging on the surface of the insulating layer, then exposing the photosensitive member to a second image-forming irradiation to be overlaid substantially simultaneously with an AC or DC corona discharge given to the photosensitive member, and subsequently giving a uniform exposure to the surface of said photosensitive member thereby obtaining an electrophotographic overlay image of the first and second irradiations.

Electrophotographic process capable of image overlay and apparatus

An overlay recording device for recording first information and second information in a superimposed mode on a recording medium by reading out the first information from storage in a first memory and the second information from storage in a second memory, thereafter converting the respective first and second information so read out into first and second dot signals, modulating a beam with logic outputs of the first and second dot signals to thereby form a beam modulated by the first information and the second information, and scanning the recording medium with the modulated beam.

Overlay recording device for recording a plurality of information in

A semi-conductor laser device has a semi-conductor laser chip and an aspherical single lens for collimating the light beam from the laser chip, said aspherical single lens being mounted in a beam exit port of a casing for protecting the laser chip, and said exit port of the casing being adapted to align the optical axis of the aspherical single lens with that of the laser chip.

Semi-conductor laser device

Control apparatus for controlling the quantity of light includes a light emitting device for emitting light in response to a driving signal applied thereto, a photodetector for receiving the light to produce a detection signal representative of the quantity of the light received, a comparator for comparing the detection signal with a reference signal, a circuit for applying a recording signal to the light emitting device, a start control responsive to an instruction signal which causes the control apparatus to start controlling the quantity of light during the time period when no recording signal is applied, an incrementing device for incrementing the driving signal to be applied to the light emitting device in response to the instruction signal received, and a stopping circuit for stopping the incrementing in response to the comparator to hold a count which is contained in the incrementing device when stopping, until the instruction signal is subsequently applied. The light emitting device may include an array of light emitting elements.

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Yokohama, Japan

Takashi Kitamura