Abstract: It is an object of the present invention to provide an electronic equipment of a high design property having an optical disc drive mounted thereon and an inexpensive and high-quality opening and closing mechanism for a tray door. The electronic equipment includes a front panel on a front surface of the equipment, and a link 25 rotatably engaged with a tray door 22. The tray door is provided with cams 22b engaged with cam pins 20b provided on the front panel to control the locus of the movement of the tray door. The discharging movement of the tray causes the link to be pushed and rotated by the tray, whereby the tray door is slid to below the tray with its upper design surface left turned upwards in the form of the movement controlled by the rotation of the link and the locus of the cams, and in this manner, the tray door is opened.

Abstract: Magnetic recording and reproducing apparatuses are narrowed in track pitch as one method of increasing the respective recording capacities. It has become evident, however, that the shocks and/or vibration applied during operation has critical effects on recording/reproduction, and it has thus become essential to improve shock resistance and vibration resistance. In a rotating magnetic head drum device including a lower fixed drum, an upper fixed drum, and a magnetic head, the upper face of the upper fixed drum and a cassette holder face are secured using a vibration suppressor plate to improve shock resistance and vibration resistance.

Abstract: The invention aims at selecting a recording sheet discharge mode in accordance with user's priority of printing speed or printed image quality. In the thermal transfer printer, when discharge concurrent with printing is selected, a microcomputer operates to rotate a mode motor to close a transport passage between a guide member and a platen roller by means of a sheet discharge plate. Starting printing by rotating the platen roller in this state, the leading end of a recording sheet is delivered to a discharge opening, which is defined by the guide member and a guide plate, and introduced between sheet discharge rollers and idler rollers. When separate discharge after printing is selected, the microcomputer starts printing without rotating the mode motor. The sheet discharge plate closes the discharge opening defined by the guide member and the guide plate. The leading end of the recording sheet is delivered to the transport passage between the guide member and the platen roller.

Abstract: A thermal transfer recording apparatus wherein printing on record paper is performed with the record paper fixed on a platen roller is constituted such that, when the record paper is to be fixed, transmission of power to the platen roller is interrupted and the platen roller is fixedly held at a predetermined position, which enables realization of a transporting system for a transport system of a thermal transfer recording apparatus of the record paper fixing type which system includes a single motor therein.

Abstract: A platen roller apparatus having a cylindrical platen roller, a recording sheet retaining member capable of moving while being maintained in parallel with the axis of the platen roller, a positioning member for positioning a recording sheet on the platen roller; and members for urging the recording sheet retaining member inwardly in the radial direction of the platen roller. The recording sheet is retained while being pinched between the outer circumferential surface of the platen roller and the recording sheet retaining member.

Abstract: A gated data burst in a multiplex transmission system is low pass filtered and modulates a carrier wave. The modulated signal has transient skirts on its leading and trailing edges due to the roll-off characteristic of the filter, and these skirts would ordinarily interfere with the signal bursts in adjoining time slots. To avoid this the skirts are clipped off by a further gate signal whose window is slightly wider than that of the first gate, and which is timed such that its edges occur at 0 levels of the burst carrier.

Abstract: The inventive system includes a central station and a plurality of satellite stations which communicate on a time division multiplex basis. The central station generates frame synchronizing and clock signals, along with digital communication signals, which are suitably modulated into channel time slots. During its individually assigned channel time slot, each satellite station extracts the frame and clock signals and demodulates the communication signals which were directed to it. The extracted frame and clock signals are used in the satellite station to retime the communication signals which are sent in bursts of modulated carrier waves from the satellite stations to the central station. The central station demodulates the bursts of carrier waves to transmit the intelligence therein to its destination. The advantage is that many stations can share the same frequency and thereby make more efficient use of the transmission capacity.

Abstract: The invention is primarily--although not exclusively--directed to an earth-to-satellite communication system using time division multiplex over a common frequency. An automatic gain control circuit in a receiver unit of the ground or central station receives burst signals transmitted in time slots individually assigned to a plurality of satellite stations. The satellite stations are dispersed in multiple directions, which means that the burst signals which they transmit are not received by the central station with the same amplitude. The inventive automatic gain control circuit causes all of the burst signals to achieve a uniform amplitude within the central station. First, the receiver separates and feeds back the various burst signals into a plurality of individually associated branches. Equipment in the separate branches amplifies the individual feedback signals, using low band-pass amplifiers, and then compounds them into a single gain control signal.

Abstract: A transmitter which transmits at least first and second burst sequences, through at least first and second channels of a radio link including a different repeater in each of the respective channels, is disclosed. A carrier signal is gated into each burst sequence in time division fashion by gating signals. By the use of gating signals reproduced from received bursts, a receiver detects an interference signal introduced from at least the first channel into the second by removing from the received bursts and interference signal that difference in frequency and/or phase which is liable to occur between the first and second bursts in the repeaters. To this end, continuous signals are controlled by the received bursts and the reproduced gating signals so as to have frequencies and phases different by the difference and are used to frequency convert the received first bursts and the received interference signal into a burst and an interference component signal.

Abstract: A plurality of pilot signals having predetermined relations are used to remove a phase-frequency difference introduced into transmission signals by one or more repeaters in a high frequency radio link. The pilot signals are also used to compensate for crosstalk introduced into respective pairs of said transmission signals.