Patent ID: 7576761

Claim:
A printer comprising a plurality of head units arranged in a conveying direction of a recording sheet, each head unit having: a line thermal head having heat-generating elements arranged in a direction orthogonal to the conveying direction of the recording paper; a movable plate that is formed so as to extend in an arranging direction of the heat-generating elements in order to fix the line thermal head; a holding plate that is formed so as to extend in the arranging direction of the heat-generating elements in order to hold the movable plate so as to be movable in a direction in which the angle between the conveying direction of the recording paper and the arranging direction of the heat-generating elements is changed, and in the arranging direction of the heat-generating elements; an angle-adjusting mechanism that changes the angle between the conveying direction of the recording paper, and the arranging direction of the heat-generating elements by rotational movement of the movable plate to which the line thermal head is fixed, and a position-adjusting mechanism that slidingly moves the movable plate to which the line thermal head is fixed in the arranging direction of the heat-generating elements, wherein the angle-adjusting mechanism and the position-adjusting mechanism are disposed at an external surface of the head unit, which is orthogonal to the line thermal head.