Abstract: The cable device includes a signal line portion electrically connecting an electronic circuit board having an electronic circuit operating at a clock signal having a high frequency with the other electronic circuit board. The cable device further includes a shield portion shielding the signal line portion having a plurality of through-holes located at intervals in the length direction of the signal line portion such that the shield portion includes a plurality of length portions differing in length from the signal line portion.

Abstract: Disclosed is a cable device including a signal line portion electrically connecting an electronic circuit board having an electronic circuit operating at a clock signal having a high frequency with the other electronic circuit board. The cable device further includes a shield portion shielding the signal line portion having a plurality of through-holes located at intervals in the length direction of the signal line portion such that the shield portion includes a plurality of length portions differing in length from the signal line portion.

Abstract: A fusion-type thermal transfer printing system using an ink ribbon having a thin film and a heat fusible ink applied on the thin film at an ink application rate of 2.5 g/m.sup.2 or less and a porous-surface recording medium having a substrate and a porous-surface layer formed on the substrate, diameters of pores in the porous-surface layer being from 1 to 10 .mu.m. The printing system has a thermal head provided with a plurality of heating resistors formed in a line at regular intervals of 8 dot/mm or less, temperature gradient of each of the heated heating resistors being such that temperature is the highest at a middle portion thereof and changes decreasingly toward ends thereof and a gradation control circuit for controlling ink fusion areas heated by the heating resistors by controlling intensity of current passed through the thermal head.