Alps Electric Co., Ltd.

Hiroyuki Murayama

Kazutaka Suzuki

Hiroshi Takahashi

Koichi Sugiyama

In a printer of the invention, a plurality of head units each including a line thermal head having heat-generating elements arranged in a direction orthogonal to a conveying direction of a recording paper are arranged in the conveying direction of the recording paper. The head unit has an angle-adjusting mechanism that adjusts the angle between the conveying direction of the recording paper, and the arranging direction of the heat-generating elements, and a position-adjusting mechanism that slidingly moves thermal head in the arranging direction of the heat-generating elements. An angle-adjusting screw of the angle-adjusting mechanism and a position-adjusting screw of the position-adjusting mechanism are disposed at an external surface of the head unit, which is orthogonal to the line thermal head.

Printer

A printer prevents color smear when a paper roll mounted on the printer is initially fed. The printer includes a plurality of printing units each having a thermal head and an ink ribbon, and a platen roller having an outer surface opposite the plurality of printing units. The platen roller can be rotated by a stepping motor. A printing medium is arranged on a roll at the most upstream side of the delivery path. A printed result of a predetermined printing length is obtained by sequentially transferring an ink to the printing medium from the upstream to the downstream printing units in an overlapping manner. The electrification period of the thermal head in each printing unit is controlled on the basis of an amount of rotation of the platen roller.

To provide a thermal printer capable of easily improving a recording quality, a plurality of recording units, arranged along a carrying path of a recording medium, are respectively provided with a recording head, a platen which opposes the recording head with the carrying path interposed therebetween and is brought into contact with and separated from the recording head, a carrying unit including a carrying roller arranged on the downstream side of the recording head, and a friction unit including a friction roller arranged on the downstream side of the carrying unit in order to prevent the disturbance generated on the downstream side from propagating upstream via the recording medium, between the respective recording units.

Growing community of inventors

Fukushima-ken, Japan

Hiroyuki Murayama