摘要:
Disclosed is an exposure amount control device for a copying machine comprising an exposure amount control circuit for controlling an exposure amount by controlling light of the exposure lamp for illuminating an original document to be copied and a digital light control signal generator for supplying a digital light control signal of a variable duty factor to the exposure amount control circuit. The digital light control signal generator includes a light intensity increase/decrease setting circuit and an oscillator for generating an oscillation output of a variable oscillation period in accordance with a light intensity signal from the light intensity increase/decrease setting circuit. The oscillation output of the oscillator is converted to an on-off light signal, which is supplied to the exposure amount control circuit as the digital light control signal. Thus, the digital light control signal generator is perfectly electrically isolated from a primary power supply circuit of the exposure amount control circuit and a highly safe exposure amount control device with a stable control ability due to an on-off light signal is provided.
摘要:
A motor driving a garage door is controlled by a controller, and the rotation of the motor in the normal and reverse directions is normally controlled in response to an actuating signal applied to the controller from a main push button switch. In a specific-mode in which an actuating signal is applied to the controller from an emergency push button switch, a mat switch or a fire sensor, the latter signal has priority over the former signal, and the motor is driven to move the garage door to its full-open position.
摘要:
A substrate transfer apparatus comprising: a plurality of floating-transfer guide plates adjacent to each other with a space therebetween, each of the guide plates having a substrate-placing surface on which a substrate is to be placed, and a plurality of floating-gas ejecting holes for floating the substrate with use of a gas; a gas supplying source for supplying the floating gas to the respective guide plates; and an arm for transferring the floated substrate from the guide plate, from which the substrate is to be transferred, to the adjacent guide plate to which the substrate is to be transferred, wherein the substrate-placing surface of the guide plate to which the substrate is to be transferred is situated lower than the substrate-placing surface of the guide plate from which the substrate is to be transferred.
摘要:
Disclosed in a history information providing device for use in a printer, such as a laser beam printer, having a print producing section, operation watching sensors and a programmable control section for controlling the print producing section. The history information providing device includes a non-volatile memory for taking-out the latest failure information such as the number of times of paper jam and the number of times of toner supply, and the latest maintenance information such as the total number of pages of printed paper and the total number of pages of printed paper by paper sizes, from the sensors and storing the latest failure and/or maintenance information therein. The device also includes a print-out instructing circuit for producing a print-out instruction to print out at least a part of the failure and/or maintenance information stored in the non-volatile memory and the secondary history information obtained from the failure and/or maintenance information. When the print-out instruction circuit has produced a print-out instruction, a part of the latest history information stored in the non-volatile memory is read out corresponding to the produced print-out instruction, and the read out part of the latest history information is subjected to calculation or modification, if necessary, and printed out by the printer per se.
摘要:
When an operation panel is detached from a main unit in a state where a display unit is projected from the main unit, the controller controls to accommodate the display unit into the main unit. When the operation panel is attached to the main unit in a state where the display unit is accommodated in the main unit, the controller controls to project the display unit from the main unit.
摘要:
A bundle of pitch-based carbon fibers which is composed of 1000 to 100,000 continuous fiber filaments having an average diameter of 4 to 8 .mu.m, a filament tensile strength of at least 3.0 GPa, and a modulus of at least 600 GPa, and also a method for producing a fine diameter pitch-based carbon fiber wherein use is made of a spinning nozzle with a single nozzle plate which has at least 1000 capillary holes, has the capillaries arranged concentrically and circularly in 3 to 20 rows, has the capillaries positioned to be divided into at least two blocks, has a columnar projection protruding at least 20 mm from the surface of the nozzle plate at the center of the nozzle plate, and has capillaries of a diameter of 50 to 110 .mu.m.
摘要:
A roller forms a curve in a sheet of recording paper to which a toner image, formed on the curved surface of a photosensitive drum, is transferred such that a transfer curve extends along the curved surface of a transfer drum. The roller is provided in a path for carrying the recording paper so as to be in contact with the transfer drum.
摘要:
A high precision image recording apparatus includes an electrophotographic device having at least a photosensitive drum and an exposure unit, for forming a toner image on the surface of the photosensitive drum; a recording sheet feed/transport unit for feeding and transporting a recording sheet to which the toner image formed on the surface of the photosensitive drum is transferred; a transfer unit for transferring the toner image on the photosensitive drum to the recording sheet fed and transported by the recording sheet feed/transport unit; and a drive unit for driving the photosensitive drum and recording sheet feed/transport unit. The drive unit is provided with a motor coupled to the photosensitive drum via a rotation transmission mechanism having a speed reduction ratio of 1/integer number (inclusive of 1/1), and the exposure unit is provided with a recording start position control unit for starting recording image information from a predetermined reference position on the photosensitive drum.
摘要:
A main control circuit for controlling a door open-close drive motor and a lamp illuminating the interior of a garage is disposed in a body of a door operation control apparatus, and an interface circuit for applying control command signals to the main control circuit is connected by two signal conductors to a control box mounted on the wall of the garage. Signal voltages of a plurality of levels can be generated from the control box to be transmitted to the interface circuit by way of the two signal conductors, and the interface circuit discriminates the level of one of the signal voltage transmitted by way of the two signal conductors to apply a control command signal for controlling a controlled object corresponding to the discriminated voltage level.