Abstract: The present invention relates to a meter suitable for use in vehicles. The meter has a polarizing window which allows light having a vertical component only to pass therethrough and is preferably oriented so that optimum angle of incidence i of the polarized light on, the windshield for example, for attenuation of the reflection thereof, occurs. The outer surface of the window is preferably provided with a non-reflecting or anti-glare finish so that light from a source external of the meter is not reflected off the window. The arrangement ensures that visibility obscuring reflections on the windshield and the like caused by the meter mounted in prominent position on the instrument panel is not caused by light sources within or external of the meter.

Abstract: A cassette roll sheet feeding apparatus for feeding a roll sheet from a cassette after the roll sheet cassette is loaded in a copying machine employs a sheet guide. The sheet guide is near a sheet outlet having at least one opening. An assembly such as a roller rotatably journaled by a shaft, serves to assist the feeding of the roll sheet through the outlet and is urged against the sheet guide through the leading end of the roll sheet.A sheet feed roller is in the copying machine body and projects through the opening in the sheet guide to hold the sheet in cooperation with the roller, when the cassette is mounted in the copying machine body. The sheet is held at the leading end portion when the cassette is removed from the copying machine body.

Abstract: An electrographic apparatus comprising a main body, a manuscript discharge tray, a slit light exposure portion, a manuscript feed mechanism including upper and lower feed mechanisms, the upper feed mechanism being arranged movably with respect to the lower feed mechanism, a photosensitive body, a sheet manuscript edge guide, a thick manuscript edge guide and means for automatically changing the two edge guides in response to a movement of the upper feed mechanism with respect to the lower feed mechanism; the apparatus being constructed and arranged such that in the case of obtaining copies of a sheet manuscript the sheet manuscript is fed by the manuscript feed mechanism under a condition that the upper feed mechanism is mounted on the lower feed mechanism and scanned by exposed light by one time and in the case of obtaining copies of a thick manuscript a thick manuscript carriage on which is disposed the thick manuscript is fed by the lower feed mechanism under a condition that the upper feed mechanism is mo

Abstract: A filter assembly for use in an electrophotographic copying machine to collect used toner which is swept off a member carrying an electrostatic latent image, by means of a rotating brush comprises a filter unit having a toner receiver and a filter holder which are integrally formed together. The filter holder carries a filter element or elements therein, and the toner receiver allows the toner which falls down in front of the filter element to form a pile thereon. The unit is detachably mounted on the copying machine. A labyrinth seal is formed between the unit and the machine when the unit is mounted in place.

Abstract: A rotary wheel with a peripheral recess rotates with the adjusting movement of a motor-driven, adjustably movable seat. A manual lever is operable to freely rotate the wheel relative to the seat to an angular rest position, where a contact element of a memory switch engages in the recess of the wheel. When the seat moves back to the initial position after an adjusting movement, the contact element snaps into the recess to open the switch stopping the motor so that the seat automatically resumes the initial position.

Abstract: An apparatus for discharging a used and fatigued developing agent from a magnetic brush developing device installed in a main body of a copying machine, which developing device has a housing with an opening at a position which is opposed to a charge retentive member such as a photosensitive drum and a record paper, a sleeve made of non-magnetic material is rotatably arranged in the housing such that it exposes the outside of the housing through the opening and a magnet assembly arranged in a space within the sleeve. First and second shafts are secured to the respective sides of the magnet assembly, a third shaft secured to the sleeve at a side which is opposed to that of the magnet assembly to which the first shaft is connected, first and second bearing members are arranged between the first and second shafts and the sleeve, respectively, and a manually operable handle is secured to either one of said second and third shafts.

Abstract: In the electrophotographic apparatus for printing one or more copies of a document, a photoconductive drum rotates at a constant velocity while being charged; a document feeding device advances a document through a light exposure portion at a constant speed and, an optical device projects an image of the exposed document onto the drum to form an electrostatic charge latent image thereon. A latent image is developed to form a toner image after which the toner image is transferred onto a record paper and the toner image is fixed on the record paper to form a final copy. Clock pulses in synchronism with the rotation of the photosensitive drum are produced, whereby master and slave timing pulse generators receive the clock pulses to produce timing pulses. Then a control device receives the timing pulses and produces control signals necessary to control the operation of the apparatus.

Abstract: A sheet holding cassette comprising a box-shaped main body open at its base and closed by a sheet receiving plate pivoted to the main body, means for releasably locking the sheet receiving plate, and means for resiliently locating the uppermost sheet of a stack of sheets charged into the main body at a given position irrespective of change of the number of the sheets.

Abstract: An electrographic apparatus which can obtain any desired number of copies of a manuscript by scanning it only one time by exposed light and which comprises a manuscript feed mechanism including upper and lower side feed mechanisms arranged above and below a manuscript feed path defined by a slit light exposure portion which projects a manuscript image therethrough, said upper side feed mechanism being movable with respect to said slit light exposure portion to define thin and thick manuscript feed paths, respectively.

Abstract: A cleaning device for an electrophotographic apparatus including a cleaning brush for cleaning unnecessary residual toner particles adhered to an electrostatic latent image retentive member, a cleaning fan for obtaining an air flow to suck the toner particles scraped by the brush and a filter for collecting the sucked toner particles is disclosed. The cleaning device comprises a path of the air flow for sucking the toner particles being made thick at the vicinity of the filter thereby to slow down a speed of the air flow, to easily catch the toner particles by the filter and to drop down the toner particles in front of the filter, and a toner reservoir being provided for collecting the toner particles dropped in front of the filter.

Abstract: An electrophotographic apparatus which includes a rotating photosensitive drum on which an electrostatic charge latent image is formed; a developing device for developing the latent image with toners to form a toner image on the drum; a transfer roller for transferring the toner image onto a record paper and arranged movably with respect to the drum; and a record paper detector for detecting a paper jamming to produce a paper jam signal. The rotation of the drum is stopped and the transfer roller is moved away from the photosensitive drum in response to the paper jam signal so as to make it easy to remove the jammed paper, and the transfer roller is moved into an initial operative position after the ddrum has rotated by such an angle that residual toners and electrostatic charge on the drum pass through the transfer roller.

Abstract: The electrophotographic apparatus for forming one or more copies of a document has a photosensitive drum rotatably arranged for forming an electrostatic charge latent image and a developing device for developing the latent image into a toner image. A transfer roller is rotatably arranged for transferring the toner image onto a record paper which is supplied between the drum and transfer roller. A pair of arms are provided each of which rotatably support a respective end of a shaft of the transfer roller through a bearing and which is slidably inserted in a recess formed in respective arms in a radial direction of the drum. Furthermore, a pair of coiled springs are each respectively provided on the respective arms and surround the bearings in such a manner that the transfer roller is forced resiliently to displace toward the drum.

Abstract: An electrophotographic apparatus for forming any desired number of copies of a document from the same and single electrostatic charge latent image once formed on a photosensitive drum. The apparatus has a copy number set dial and a copy number counter for storing a desired copy number set by the dial. A control circuit for produces a load signal which serves to transfer the copy number set in the dial into the copy number counter. After the copy number has been transferred from the dial into the counter any desired copy number to be formed for a next document can be set in the dial. In a preferred embodiment the load signal is generated after a duplicating operation for a first copy has been initiated.

Abstract: An electrographic process of producing, on a dielectric coated record medium, an electrostatic copy latent image by modulating a flow of corona ions with the aid of an electrostatic latent image which has been produced on a photoconductive photosensitive screen having a number of openings. The process is characterized by making a ratio K of a maximum surface potential V volts of the electrostatic copy latent image produced on the dielectric coated record medium to an intensity of the electric field E volts/mm established between the photoconductive photosensitive screen and the dielectric coated record medium, i.e. K=V/E smaller than about 0.18 for the purpose of preventing enlargement of dots of the copy picture image.

Abstract: An electrophotographic apparatus comprising a charge retentive drum such as a photosensitive drum including an electrically conductive drum substrate and a charge retentive layer applied on the drum substrate, a developing device for developing an electrostatic latent image formed on the drum with toner to form a toner image, a transfer roller for transferring the toner image onto a record paper, the record paper being fed between the drum and the transfer roller, a peelling claw for peeling the record paper having the toner image transferred thereto off the drum surface, the peeling claw being made of conductive metal and its free end being urged against a depressed edge portion of the conductive drum substrate, and means for connecting the peeling claw to the earth potential.

Abstract: A roll sheet cassette loading apparatus having a cassette retaining member attached in a movable fashion in a copying machine body adapted to assume first and second positions selectively for removably supporting said cassette. The roll sheet in said cassette is maintained in a first condition providing the roll sheet in readiness for being advanced when the cassette retaining member assumes the first position. The roll sheet being released from the first condition to assume a second condition in which mounting and removal of said cassette in and out of the copying machine body occurs when the cassette retaining member assumes the second position.

Abstract: An electrophotographic apparatus for forming or printing any desired number of copies of a document from the same and single electrostatic charge latent image comprisinga photosensitive member such as a photoconductive drum which is rotated at a constant velocity;a corona charger for uniformly charging the photosensitive drum;a document feeding device for advancing the document through an exposure-scanning portion at a constant speed;an optical device for projecting an image of the document at the exposure-scanning portion onto the drum to form an electrostatic charge latent image thereon;a developing device for developing the latent image with toner particles to form a toner image;a transferring device for transferring the toner image onto a record paper;a fixing device for fixing the toner image on the record paper to form a final copy;a clock pulse generator for producing clock pulses in synchronism with the rotation of the photosensitive drum;master and slave timing pulse generators for receiving the cloc

Abstract: A roll sheet feeding device comprising a sheet feed roller for feeding a roll sheet, and a stopping means for stopping said sheet feed roller at least one predetermined position, said means being provided in a midway of a passage through which a driving force is to be transmitted to said sheet feed roller, a diameter and an amount of rotation of said sheet feed roller is so determined that said sheet is fed for a predetermined length until said roller is stopped at a predetermined position after said sheet feed roller starts rotating from a predetermined position, and said stopping means being put into operation immediately before said sheet feed roller completes said amount of rotation, and said stopping means being interrupted said operation thereof at the time that said sheet feed roller completes said amount of rotation, whereby said sheet is cut by a predetermined length.

Abstract: A plurality of belts or wires are slackly strung between supporters mounted on the upright leg portions of a backrest frame to cross the front of the frame. Electrically driven tensioning means successively tensions each belt or wire to cause same to become taut.

Abstract: A shutter opening and closing mechanism for an electrographic apparatus comprising a dark box for surrounding a photosensitive screen and provided with an opening through which light flux reflected from a manuscript image is projected onto the photosensitive screen. The opening is closed by a shutter operatively interlocked with a reciprocating exposing and scanning mechanism and becomes open only when a first electrostatic latent image corresponding to the manuscript image is to be produced on the photosensitive screen.