Patent ID: 6477946
Filing Date: 2002-11-12
Classification: B41L

Abstract:
A stencil printing machine comprising:a printing drum and a pressure drum whose outer peripheral surfaces are close to each other and which are rotatable independently; a stencil sheet attached on and removable from the outer peripheral surface of said printing drum; an inner press roller arranged in an inner peripheral surface side of said printing drum, and which is shifted between a pressure position at which said inner press roller presses said inner peripheral surface of said printing drum, and a standby position at which said inner press roller is separated in position from said inner peripheral surface; and an inner press mechanism for adjusting a pressure power of said inner press roller at said pressure position, which comprises: an ink supply unit arranged at inside of said printing drum for shifting said inner press roller between said pressure position and said standby position; and power transfer means arranged at outside of said printing drum, and for providing a driving power to said ink supply unit in order to shift said inner press roller between said pressure position and said standby position, and in order to adjust said pressure power of said inner press roller at said pressure position, wherein during printing, both said printing drum and said pressure drum are rotated so that said outer peripheral surfaces, which are close to each other, of both said printing drum and said pressure drum rotate in a same direction, and a stencil printing is performed by pressing a print paper which is fed between said pressure drum and said stencil sheet placed on said surface of said printing drum by said pressure power; and wherein said power transfer means comprises a combined power means for receiving said driving power from a single driving power source in order to shift said inner press roller between said pressure position and said standby position and in order to adjust said pressure power of said inner press roller at said pressure position.