| 摘要 |
A printer head includes a platen roller, a drive frame movable toward and away from the platen roller, a support block provided on the drive frame, a printing head element secured to the support block to be movable toward and away from the platen roller which it opposes, a pair of freely rotatable guide rollers mounted on the support block and having the printing head element interposed therebetween, a conveying mechanism for conveying a card to be printed on between the printing head element and the platen roller, an ink ribbon which travels while in contact with the pair of guide rollers and the printing head during printing, the ribbon being arranged between the card and the printing head element, a signal source for applying a print signal to the printing head element to cause the element to transfer ink from the ink ribbon to the card, a position adjusting screw provided on the support block to be movable back and forth, the printing head element being positionally adjusted back and forth relative to the platen roller by bringing the head of the position adjusting screw into abutment with a fixed portion of the drive frame, and a printing pressure adjusting mechanism operative in the printing state to press the printing head element against the card via the ink ribbon at a predetermined printing pressure and to adjust the printing pressure. |
