Method and device for controlling printing density in a stencil printing machine

摘要

A method of controlling printing density in a stencil printing system in which a perforated stencil sheet is wound around a circumferential surface of a printing drum (37) to which an ink is supplied. The ink is transferred from the printing drum (37) to a printing sheet (P) through the perforated stencil sheet (M) by pressing the printing sheet (P) to the printing drum (37) while the drum (37) is rotated. The method comprises controlling an amount of ink transferred to a printing sheet by selecting a specific value of D from a range predetermined in accordance with the following equation: $In\; which\; F\; is\; a\; possible\; range\; of\; pressing\; force\; at\; which\; the\; printing\; sheet\; is\; pressed\; to\; the\; drum,\; and\; f\; is\; a\; possible\; range\; of\; rotation\; speed\; of\; the\; drum.\; Also\; provided\; is\; a\; printing\; density\; controlling\; device\; for\; stencil\; printing\; which\; comprises\; a\; means\; for\; setting\; a\; specific\; value\; of\; D\; within\; a\; range\; predetermined\; in\; accordance\; with\; the\; equation\; above,\; whereby\; an\; amount\; of\; the\; ink\; transferred\; to\; the\; printing\; sheet\; is\; controlled.\mathop{\mathrm{image}}$