Requirements for Unity of Application - Japan Patent Office

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same; i. e., application device for web for corrugated board. Therefore, the industrial fields of application are the same. In addition, both invention have the same problem to be solved; It makes possible that the number of application roller on working position is changed continuously for the desired face for application by a relatively simple mechanism. [Concerned Section] Patent Law Section 37(i) 24
[Example 4] [Title of the Invention] Thermal head driving circuit [Claims] 1. A thermal driving circuit for the thermal head comprising: A memory circuit (F1) for high or low memory signal outputs (1) upon clock countdown that stores and updates the dot information (DATA); a gate (G1) which outputs chopped signals synchronizing with clock signals when the memory signal (1) is high and always outputs high signals when the memory signal (1) is low; and an AND gate (G2) which outputs the AND signal to heating element (H) of the thermal head as driving signals for heating element (H) of the thermal head by inputting output of this gate, clock signals and dot information data (DATA). (See Figure1, 2) 2. Thermal head driving circuit comprising: A means for memory (F2) to store and update dot information data (DATA) upon clock countdown and to output high and low signals (1) for this dot information data; A gate (G3) synchronizes with clock signals to output control signals (4) which divide the power source voltage (Q1, Q2, Z1, Z2) to a power source circuit applying pressure (a) to the heating element (H) of the thermal head when memory signals (1) for this memory measure (F2) are high; and an AND gate (G4) to output driving signals (5) according to dot information data (DATA) to heating element of the thermal head by inputting clock signals and dot information data (DATA). (See Figure 3,4) [Excerpt from Detailed Description of the invention and Drawings] This invention is designed to stabilize the rise of the temperature of the thermal head in a thermal printer. The thermal printer with thermal head containing dot-heating elements has such problems to be solved that when continuous printing is done by applying fixed tension and signals at a regular interval to the dot-heating element, the next printing is done before the temperature goes down, and consequently the temperature of the head gradually rises. This situation causes unevenness in printing and finally eventually the head is damaged because the temperature goes up beyond the tolerance limit. This invention controls the operating power supply to the head by storing dot information and comparing with new information. Therefore, the invention has remarkable effects of keeping the temperature of the head face stable, resulting in stable printing density and preventing the damage to the head. Figure 1 Figure 3 25
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Requirements for Unity of Application - Japan Patent Office

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