Stamp device having means for controlling dot perforation density.

摘要

A stamp device capable of controlling numbers of perforations formed by a thermal head (7). A perforated image is formed by the thermal head in a heat sensitive stencil sheet (1). An ink in an ink pad (32) passes through the perforated image for providing an inked image on a print sheet (33). If perforations are densely formed, excessive ink may pass through the perforations. Therefore, the numbers of the perforations are controlled or reduced at a thick character portion. A control unit is provided for changing ON dot area to the OFF dot area of the thermal head if the ON dot area are densely provided. <IMAGE>