Abstract: A temperature control circuit of an oven controlled crystal oscillator is a circuit in which a supply voltage is applied to a first terminal of a resistance R10, a first terminal of a resistance R11, and a first terminal of a heater resistance RH1, a second terminal of a thermistor TH1, a second terminal of a temperature sensing element, and a collector side of a transistor Q2 are connected to a common ground, a first terminal of a temperature sensing element ZZ is connected to an input terminal of an operational amplifier IC2, and a setting temperature in a thermostatic oven is controlled to gradually rise as an ambient operative temperature rises.

Abstract: A temperature control circuit of oven-controlled crystal oscillator includes a heater resistor, a first resistor, a thermistor, a second resistor, a third resistor, a differential amplifier, a PNP-type power transistor, and a PNP-type current-limiting transistor. The thermistor outputs a voltage depending on a temperature. The differential amplifier amplifies a difference between the voltage received by the one input terminal and the voltage received by the other and output as a control voltage. The PNP-type power transistor includes an emitter where the other end of the heater resistor is connected, a base that receives an output of the differential amplifier, and a grounded collector. The PNP-type current-limiting transistor has an emitter where a power voltage is supplied, a base that receives a voltage between the other end of the heater resistor and the emitter of the power transistor, and a collector connected to the base of the power transistor.

Abstract: There is provided a thermal transfer recording medium capable of obtaining high transfer sensitivity during high-speed printing, that is, decreasing the amount of a dye used in a dye layer; and preventing abnormal transfer during printing even after storage in a high-temperature and high-humidity environment. The thermal transfer recording medium (1) contains: a heat-resistant sliding layer (40) that is formed on one surface of a substrate (10); and an undercoat layer (20) and a dye layer (30) that are sequentially laminated on the other surface of the substrate (10), in which the undercoat layer (20) contains, as major components, a polyvinyl pyrrolidone and a polyvinyl alcohol having a crystallinity degree of 15% or higher, and the dye layer (30) contains an anthraquinone-based thermal transfer dye.

Abstract: An image forming apparatus for fixing a toner image to a recording sheet by transporting the recording sheet through a fixing nip formed by a heating rotating body and a pressing rotating body that press against each other. The image forming apparatus includes an idle rotation unit that causes idle rotation of the heating rotating body and the pressing rotating body during a standby state of the image forming apparatus, a cumulative amount recording unit that measures an amount of the idle rotation and record a cumulative amount of the idle rotation, and a prohibiting unit that prohibits the idle rotation unit from causing the idle rotation when the cumulative amount reaches a predetermined allowable value.

Abstract: An image forming apparatus having; image supporting members provided for a plurality of colors; chargers to be impressed with charging biases to charge the respective image supporting members; developing devices to be impressed with developing biases to develop latent images formed on the image supporting members; a charging bias power supply, including high-voltage DC power supply circuits and an AC power supply circuit, for applying the charging biases, which are generated by superposition of direct-current voltages and an alternate-current voltage, to the chargers; and a control circuit that performs stop processing to stop applications of the charging biases and the developing biases.

Abstract: An image forming device switches a system speed when assignment of a license has been accepted, and stores switching information of the system speed. The image forming device performs two-stage image stabilization for determining a setting value of a parameter relating to an image formation process of the image forming device when the switching information of the system speed is stored, and performs single-stage image stabilization for determining a setting value of the parameter relating to the image formation process of the image forming device when the switching information of the system speed is not stored.

Abstract: An image forming apparatus includes control units that are booted up in parallel after reset, and further includes: a display unit displaying, in multiple stages, overall boot-up progress that is boot-up progress of the entire apparatus; a display control unit controlling the display unit to display the overall boot-up progress, wherein the display control unit includes: an estimation subunit making estimation of the overall boot-up progress based on period counted after the reset; and a reception subunit receiving boot-up progress of each control unit, and until receiving the boot-up progress of each control unit or the boot-up progress of the latest control unit in terms of boot-up completion, the display control unit performs control based on the estimation, and after receiving the boot-up progress of each control unit or the boot-up progress of the latest control unit, the display control unit performs control based on the received boot-up progress.

Abstract: A printer and reprinting control method do not reprint when an error accompanied by no damage to the actual printing area or print image on paper occurs so that consumables are not wasted. The printer reprints the label on which the print image was being formed when a specific error occurs if the error occurred while the inkjet head was forming the print image in the actual printing area of the label. When the non-printing area of the label is passing the printing position of the inkjet head, the print image in the actual printing area that was printed immediately before an error occurs is reprinted only if a specific error is detected, such as a paper jam error or mechanical error with the possibility of damage to the paper or label.

Abstract: A temperature control circuit of an oven controlled crystal oscillator (OCXO) is provided. A first and a second digital potentiometer are correspondingly arranged in a bridge circuit which outputs a voltage to an input terminal of a differential amplifier (OPAMP), wherein the resistance value of the first digital potentiometer is adjustable so as to adjust the temperature of the oven to the peak temperature of the crystal resonator, and the resistance value of the second digital potentiometer is adjustable so as to cancel the temperature gradient of the first digital potentiometer. In the temperature control circuit of OCXO, the heat generation of the heater resistor is controlled by the power transistor based on the control voltage from the differential amplifier.

Abstract: An oven controlled crystal oscillator includes a crystal unit, a temperature control circuit, and a circuit board. The temperature control circuit is configured to control a temperature of the crystal unit. The crystal unit includes a flange that projects outward to an entire outer periphery in one end. The circuit board includes a depressed portion in which the flange is partially inserted. The temperature control circuit includes a power transistor, a thermistor as a temperature sensor, and a metal pattern. The power transistor becomes a heat source. The metal pattern commonly connects a ground terminal of the crystal unit, a collector of the power transistor, and a ground terminal of the thermistor. The crystal unit is positioned in a state where the flange is partially inserted in the depressed portion. The crystal unit is connected to the metal pattern.

Abstract: When a unit containing a fuse is mounted, in response to detection of a potential indicating that the fuse has not been blown by a detection circuit, a current for blowing the fuse is supplied from a blowing circuit to the mounted unit containing the fuse, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and after current supply, respectively. When a unit containing a non-blown component instead of a fuse is mounted, a current is supplied from the blowing circuit to the mounted unit containing the non-blown component, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and during current supply, respectively, or potentials detected by the detection circuit before current supply and after current supply, respectively.

Abstract: The oscillator circuit 10 comprises a crystal oscillator 20, a transistor 30, whose base is connected to the crystal oscillator 10, a first resonance circuit 40 that is between the emitter of the transistor 30 and the ground, the first resonance circuit 40 having a first inductor 42 and a first capacitor 44, a second resonance circuit 50 that is between the emitter and the ground, the second resonance circuit 50 having a second inductor 52 and a second capacitor 54, and a third capacitor 60 that is between the base and the emitter. The first resonance frequency of the first resonance circuit 40 is higher than the overtone frequency of the main oscillation of the crystal oscillator 20, and the second resonance frequency of the second resonance circuit 50 is lower than the overtone frequency of main oscillation of the crystal oscillator 20.

Abstract: An image forming apparatus for fixing a toner image to a recording sheet by transporting the recording sheet through a fixing nip formed by a heating rotating body and a pressing rotating body that press against each other. The image forming apparatus includes an idle rotation unit that causes idle rotation of the heating rotating body and the pressing rotating body during a standby state of the image forming apparatus, a cumulative amount recording unit that measures an amount of the idle rotation and record a cumulative amount of the idle rotation, and a prohibiting unit that prohibits the idle rotation unit from causing the idle rotation when the cumulative amount reaches a predetermined allowable value.

Abstract: An image forming apparatus having; image supporting members provided for a plurality of colors; chargers to be impressed with charging biases to charge the respective image supporting members; developing devices to be impressed with developing biases to develop latent images formed on the image supporting members; a charging bias power supply, including high-voltage DC power supply circuits and an AC power supply circuit, for applying the charging biases, which are generated by superposition of direct-current voltages and an alternate-current voltage, to the chargers; and a control circuit that performs stop processing to stop applications of the charging biases and the developing biases.

Abstract: A printer and reprinting control method do not reprint when an error accompanied by no damage to the actual printing area or print image on paper occurs so that consumables are not wasted. The printer reprints the label on which the print image was being formed when a specific error occurs if the error occurred while the inkjet head was forming the print image in the actual printing area of the label. When the non-printing area of the label is passing the printing position of the inkjet head, the print image in the actual printing area that was printed immediately before an error occurs is reprinted only if a specific error is detected, such as a paper jam error or mechanical error with the possibility of damage to the paper or label.

Abstract: A temperature control circuit of oven-controlled crystal oscillator includes a heater resistor, a first resistor, a thermistor, a second resistor, a third resistor, a differential amplifier, a PNP-type power transistor, and a PNP-type current-limiting transistor. The thermistor outputs a voltage depending on a temperature. The differential amplifier amplifies a difference between the voltage received by the one input terminal and the voltage received by the other and output as a control voltage. The PNP-type power transistor includes an emitter where the other end of the heater resistor is connected, a base that receives an output of the differential amplifier, and a grounded collector. The PNP-type current-limiting transistor has an emitter where a power voltage is supplied, a base that receives a voltage between the other end of the heater resistor and the emitter of the power transistor, and a collector connected to the base of the power transistor.

Abstract: The invention provides a shield case to cover a body, the body having a main body and first and second connecting portions projecting from the main body and lying adjacent to each other along a first direction. The shield case includes first to forth conductive shells. The first and second shells cover an outer circumference of the main body; the third shell covers the first connecting portion; and the fourth shell covers the second connecting portion. The third shell is in contact with at least one of the first and second shells. The first or fourth shell is in contact with the second shell. The fourth shell is provided integrally with the first shell and is adjacent to the third shell along the first direction. The first or fourth shell may not contact the second shell if the third shell is contactable with both the first and second shells.