Thermal Printhead
AssigneeRohm Co., Ltd.
InventorMasatoshi Nakanishi
Life of this patent
Estimating the term…
Abstract
A thermal printhead (A1) includes a substrate (1) and a plurality of heat-producing resistance sections (30) provided on the substrate (1). The heat-producing resistance sections (30) melt ink of an ink ribbon, which is transferred together with a recording sheet, to transfer the ink onto the recording sheet. An inequality surface region (7) is provided downstream from the heat-producing resistance sections (30) in a secondary scanning direction (x) which is the transfer direction of the ink ribbon. The inequality surface region includes a plurality of projections (70) each of which extends in the secondary scanning direction (x) and which are aligned at predetermined intervals in a primary scanning direction (y) which is perpendicular to the secondary scanning direction (x).
Claims5
A thermal printhead comprising a substrate and a plurality of heat-producing resistance sections provided on the substrate, the heat-producing resistance sections melting ink of an ink ribbon, which is transferred together with a recording sheet, to transfer the ink onto the recording sheet;
- wherein the thermal printhead further comprises an inequality surface region provided downstream from the heat-producing resistance sections in a secondary scanning direction which is a transfer direction of the ink ribbon, the inequality surface region including a plurality of projections each of which extends in the secondary scanning direction and which are aligned at predetermined intervals in a primary scanning direction which is perpendicular to the secondary scanning direction.
A thermal printhead comprising a substrate, a glaze layer provided on the substrate, a plurality of heat-producing resistance sections provided on the glaze layer, an electrode layer connected to the heat-producing resistance sections, and a protective layer covering the heat-producing resistance sections and the electrode layer, the heat-producing resistance sections melting ink of an ink ribbon, which is transferred together with a recording sheet, to transfer the ink onto the recording sheet;
- wherein the electrode layer includes an electrode portion located downstream from the heat-producing resistance sections in a secondary scanning direction which is a transfer direction of the ink ribbon;
- and
- wherein, of an obverse surface of the protective layer, a region which is located downstream from the electrode portion in the secondary scanning direction is lower, in height on an obverse surface of the glaze layer, than a region covering the electrode portion and comprises a smooth surface without recesses or projections.
Dependencies are inferred from the claim text.