Oki Electric Industry Co., Ltd.

Kazuo Nakano

Kazuo Hase

Norio Ishibashi

Toshiyuki Iwabuchi

Ichiji Yamamoto

There are disclosed automatic telephone dialing method and apparatus that can be commonly used in a plurality of countries for telephone-related devices such as telephone sets. According to the automatic telephone dialing method, control data for controlling various signals to be delivered to a circuit for placing a call are stored in a storage unit, and the signals are issued while their timing is controlled by the control data stored in the storage unit at the time of initiating a call. The automatic telephone dialing apparatus is composed of a storage unit for storing control data for controlling the timing of signals to be delivered to a circuit in initiating a call, an input unit for entering an address, a dialing signal issuing unit for issuing a dialing signal to the circuit, and a control unit for controlling the timing of delivery of the dialing signal according to the control data stored in the storage unit when issuing the dialing signal to the circuit through the dialing signal issuing unit and also for controlling the storage unit, the input unit, and the dialing signal issuing unit.

Automatic telephone dialing method and apparatus

A thermal printing system having a plurality of thermal elements aligned on a straight line in the direction perpendicular to the moving direction of a thermal paper for printing characters on a dot matrix principle has been found. Each thermal element is selectively energized by a power pulse according to the desired pattern to be printed, and the pulse width of said power pulse which is applied to a thermal element is controlled according to the moving speed of a thermal paper and/or the status (black/white) of the previously printed several dots so that the desired concentration or color density is obtained. A digital memory which stores the status of the previously printed dots or the duration between the time that the last black dot is printed and the present time is provided, and according to that digital memory, the trigger pulse for initiating the power pulse for each thermal element is defined. Thus, a thermal paper is always heated to a proper temperature to provide the desired printed concentration in spite of the change of the moving speed of a thermal paper and/or the status of the previously printed dots. Then, the high speed printing and/or the variable speed printing is obtained.

Thermal printing system

A thermal recording system in which a thermal treated paper is printed by a thermal head having a series of aligned heat-generating resistor elements and current-holding elements like SCR (thyristor) corresponding to each of said heat-generating resistor elements for holding electric current. The power source for heating said resistor elements is a periodic voltage like a commercial alternate current (A.C.), or a pulsating current which is obtained by rectifying the commercial alternate current. The printing to each cell is accomplished within a single period of said periodic power source, and the duration of heating the resistor elements within said single period is controlled according to the peak voltage or current of the power source, in order to provide the constant concentration or density of printing. Thus, means for converting the peak value of the power source to the time delay is provided. The resistor elements are heated after said time delay in each half cycle of said periodic power source, until the instantaneous voltage or current of the power source reaches zero. Then, the printing concentration is free from the change of the voltage of the power source.

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Tokyo, Japan

Kazuo Nakano