Abstract: A page printer is provided which includes a housing having a lateral side plate that is formed from an electrically conductive material, with a gate roller, a developing unit, a photosensitive drum unit, a fixing unit and a paper discharging roller mounted in the housing. The electronic circuitry for controlling the page printer is disposed in a side portion of the housing with the lateral side plate disposed between the electronic circuitry and the units.

Abstract: A page printer having a housing body and including a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharging roller arranged on the front side of the housing body in the order stated from above so that the printing sheet conveying path is substantially vertical to reduce floor area required for installation. An optical writing unit is provided on the rear side of the housing body. Guide members are provided on the housing body to readily mount or demount the photo-sensitive drum unit. Further, a shield board is disposed between the photo-sensitive drum unit and the fixing unit so that the printing sheet will not be stained by toner scattering from the photo-sensitive drum.

Abstract: In a page printer, a gate roller, a developing unit, a photo-sensitive drum unit, a fixing unit and a sheet discharging roller are mounted on the open front side of a housing body in the order stated from above, thus forming a substantially vertical sheet conveying path. As a result, the installation floor area is reduced. In the rear portion of the housing, and a transferring unit and a sheet guide member are provided on the cover of the housing body. Thus, the light beam generating unit and the photo-sensitive drum are maintained unchanged in position at all times. A cut sheet feeder is mounted over the housing body so that it is movable back and forth, thus facilitating the inspection and maintenance of the printer.

Abstract: A single-scan, multi-color image forming apparatus includes a document support for the support of an original document and a scanner, including a light source that is supported for movement from one end of the document support toward the opposite end for scanning successive incremental areas of the original document placed on the document support. An editing lever is supported for movement along one side of the document support in a direction conforming to the direction of movement of the scanner. An image forming device forms, on a single copying sheet, images of portions of the original document, which are positioned upstream and downstream of the editing lever with respect to the scanning direction, in first and second colors respectively. Also, a control unit controls the exposure made by the scanner.

Abstract: An image forming apparatus employing a face-down delivery system in which the plane of the recording medium at any position relative to any other position assumed by the recording medium beginning with a stacking tray and ending with a delivery tray does not exceed 90.degree.. The apparatus includes a detachable cartridge which includes a photosensitive member, a charging device and a cleaning device. In one preferred embodiment, register rollers and fixing rollers are positioned relative to each other such that a substantially zero angular deviation exists in the path traveled by the recording medium between these two pairs of rollers.

Abstract: A copying apparatus including a recording module for forming an image on copy paper sheets fed from a sheet feeding portion and discharging the copy paper sheets to a sheet ejecting portion and a sheet processing module mounted detachably on the sheet ejecting portion. The sheet processing module includes a sheet cassette mounted detachably on the sheet processing module and the sheet feeding portion, a copy receiving tray and a changeover device for changing over to the sheet cassette or the copy receiving tray, a passage of the copy paper sheets discharged from the sheet ejecting portion.

Abstract: A copying apparatus including a recording device for forming an image on copy paper sheets fed from a sheet feeding portion and discharging the copy paper sheets to a sheet ejecting portion, a sheet cassette mounted detachably on the sheet ejecting portion and the sheet feeding portion, a copy receiving tray, a mode selecting device for selecting first and second modes for accommodating the discharged copy paper sheets in the copy receiving tray and the sheet cassette, respectively, a cassette detecting device and a control device for controlling the mode selecting device in accordance with detection states of the cassette detecting device.

Abstract: A television receiver comprises a video signal processing circuit including a video signal demodulating circuit for generating three primary color signals from an input composite video signal, a delay circuit coupled in series to the video signal demodulating circuit within the video signal processing circuit, a parallel circuit system having virtually no delay time and coupled in parallel to the video signal processing circuit, and a picture tube applied with signals passed through a signal system of the video signal processing circuit and the parallel circuit system. The delay circuit has a delay time .tau..sub.b described by a relation .tau..sub.b .apprxeq.N.tau..sub.H -.tau..sub.a, where N is a natural number including one, .tau..sub.H represents a horizontal scanning period and .tau..sub.a represents a delay time of the signal system of the video signal processing circuit.

Abstract: A charging system for a vehicle battery comprises a voltage detecting circuit having at least one element, such as a Zener diode, having an impedance variable in accordance with a voltage from an auxiliary rectifier connected to the armature coils of the alternator of the system. When the generating voltage is low at the initial operating period, the impedance of the voltage detecting circuit is kept high, and thus the generated current from the auxiliary rectifier is all supplied to the field coil of the alternator without being consumed by a driving circuit of a charge-indicating lamp. As the voltage from the auxiliary rectifier exceeds a predetermined voltage, the impedance of the detecting circuit lowers to cause the driving circuit to energize the lamp. The voltage detecting circuit may be constructed of one or more than one Zener diode, or of a plurality of diodes connected in the forward direction.

Abstract: A miniature printer includes character rings, each having a series of characters on the outer periphery thereof and teeth on a side surface thereof for selection of a character to be printed. The shaft carrying the character rings also has mounted thereon a radially-slotted disc through the slots of which a light beam is passed for signalling the angular position of said shaft, the light beam being directed at light-detection means. Electronic circuitry controls pawls for selectively stopping the character rings so that a selected character on each ring is brought to rest at a printing position for printing. The electronic circuitry also controls the intermittent feed of printing paper and printing ribbon. A gear-selection mechanism provides for a plurality of printing-paper feed rates as well as for holding the paper stationary when required.A number of the components are of unitary contruction to increase the ease of assembly and decrease the costs as well as the number of parts.

Abstract: A miniaturized printer wherein the duration of each print cycle, the sequence of printing operations performed in each print cycle and the time between each print cycle is controlled by a detecting arrangement. The detecting arrangement is adapted to detect the rotary position of a plurality of print rings having print characters circumferentially disposed therearound and for generating a character selection timing pulse for each of the available rotational positions of each print ring during a print cycle. The rotational position of each print ring corresponds to a print character circumferentially disposed about the print ring and, to this end, a print selection mechanism associated with each of the print rings selectively positions each of the print rings at respective predetermined print positions during each print cycle in response to the character selection timing pulses produced by the detection arrangement so that printing can be performed thereby.

Abstract: A miniaturized printer wherein the duration of each print cycle, the sequence of printing operations performed in each print cycle and the time between each print cycle is controlled by a detecting arrangement. The detecting arrangement is adapted to detect the rotary position of a plurality of print rings having print characters circumferentially disposed therearound and for generating a character selection timing pulse for each of the available rotational positions of each print ring during a print cycle. The rotational position of each print ring corresponds to a print character circumferentially disposed about the print ring and, to this end, a print selection mechanism associated with each of the print rings selectively positions each of the print rings at respective predetermined print positions during each print cycle in response to the character selection timing pulses produced by the detection arrangement so that printing can be performed thereby.