Abstract: A stencil printing machine, which includes: a drum which is freely rotatable and has an outer peripheral wall formed of an ink impermeable member, in which a stencil sheet is mounted on a surface of the outer peripheral wall; an ink supplying device which has an ink supply port on the outer peripheral wall of the drum, and supplies the ink, which is guided from an ink tank, from the ink supply port to the surface of the outer peripheral wall; and a pressure roller which presses a print sheet fed thereto to the outer peripheral wall. The supply tank is placed below the lowermost position of the outer peripheral wall of the drum. Moreover, a position where the ink supply port is located above a liquid level of the ink in the supply tank is set at a rotation stop position of the drum.

Abstract: A stencil printing machine includes a rotatable printing drum including an outer peripheral wall of ink impermeable material. A stencil paper is mounted around the surface of the outer peripheral wall. An ink supplying mechanism includes an ink supplying unit in the maximum printing area of the outer peripheral wall of the printing drum and causes ink to be supplied from the ink supplying unit to the surface of the outer peripheral wall. A pressure roller presses a fed print sheet against the outer peripheral wall.

Abstract: A stencil printing machine, which includes: a drum which is freely rotatable and has an outer peripheral wall formed of an ink impermeable member, in which a stencil sheet is mounted on a surface of the outer peripheral wall; an ink supplying device which has an ink supply port on the outer peripheral wall of the drum and has an ink tank storing an ink, and supplies the ink, which is guided from the ink tank, from the ink supply port to a surface of the outer peripheral wall; an ink recovery device which has an ink recovery port on the outer peripheral wall of the drum, and recovers, from the ink recovery port, an extra ink on the surface of the outer peripheral wall; and a pressure roller which presses a print sheet fed thereto to the outer peripheral wall. The ink recovery device is configured to recover, to the ink tank, the extra ink recovered from the ink recovery port.

Abstract: There are disclosed a stencil printing ink having an ink thread-forming length when a 15 mm diameter chrome steel ball is pulled out of the ink at 150 mm/s of 30 mm or longer at 23° C.; and a stencil printing ink comprising a water-based ink comprising an unsaturated straight-chain carboxylic acid-based water-soluble polymer.

Abstract: There is disclosed a stencil printing method carried out by employing a stencil printing machine comprising: a drum which is rotatable and has a outer peripheral wall formed by an ink impermeable member and in which a stencil sheet is mounted on a surface of the outer peripheral wall; an ink supply device which has an ink supply unit provided on the outer peripheral wall of the drum and supplies ink on the surface of the outer peripheral wall from the ink supply unit; and a pressure roller which presses a fed print medium onto the outer peripheral wall; the method comprising: a step of mounting a stencil sheet on the drum; a step of plate-making the stencil sheet; and a step of transferring a water-based ink to a print medium by making the water-based ink pass through perforations of the stencil sheet.

Abstract: A stencil printing machine includes a drum on which a stencil sheet is mounted, and a pressure roller which presses a print sheet fed between the drum and the pressure roller and rotates together with the drum. The print sheet is fed from an upstream side of the pressure roller in a conveying direction, an image is transferred from the stencil sheet onto the fed print sheet in a process where the print sheet passes between the drum and the pressure roller, and the print sheet on which the image is transferred is discharged to a downstream side of the pressure roller in the conveying direction.

Abstract: A stencil printing machine includes: a drum which is freely rotatable and has an outer peripheral wall formed of an ink impermeable member, in which a stencil sheet is mounted on a surface of the outer peripheral wall; an ink supply device which has an ink supply port on the outer peripheral wall of the drum, and supplies ink to the surface of the outer peripheral wall from the ink supply port; a pressure roller which presses a print medium fed thereto to the outer peripheral wall; and a first cap device capable of closing the ink supply port. Moreover, the stencil printing machine further includes: an ink return device which has an ink return port on the outer peripheral wall, and returns the ink which flows into the ink return port; and a second cap device capable of closing the ink return port.

Abstract: A stencil clamping portion which clamps a tip end of a stencil sheet on an outer peripheral wall of a drum is provided, and the stencil sheet clamped by the stencil clamping portion is wound and attached around the outer peripheral wall. The stencil clamping portion includes an insertion slit which is provided along an axial direction of the drum and open to a surface of the outer peripheral wall, and an elastic sheet which pinches the stencil sheet inserted into the insertion slit. The tip end of the stencil sheet is inserted into the insertion slit by an insertion blade, and pinched by the elastic sheet.

Abstract: A stencil printing machine has a rotatable printing drum including an outer peripheral wall of ink impermeable material. A stencil paper is mounted on the surface of the outer peripheral wall. An ink supplying mechanism includes an ink supplying unit in the outer peripheral wall of the printing drum. The ink supplying mechanism supplies ink from the ink supplying unit to the surface of the outer peripheral wall. A pressure roller presses a fed print sheet against the outer peripheral wall. An ink recovering mechanism recovers ink which has flown out of a maximum printing area of the outer peripheral wall of the printing drum. A pressing mechanism presses the stencil paper against the outer peripheral wall of the printing drum.

Abstract: A stencil printing machine has a rotatable printing drum including an outer peripheral wall of ink impermeable material. A stencil paper is mounted on the surface of the outer peripheral wall. An ink supplying mechanism includes an ink supplying unit in the outer peripheral wall of the printing drum and supplies ink to the surface of the outer peripheral wall. A pressure roller presses a fed print sheet against the outer peripheral wall. When an initial printing operation is performed after a stencil paper is mounted on the printing drum, the ink supplying mechanism is caused to supply the surface of the outer peripheral wall, in advance, with an amount of ink which is larger than an amount of ink which is supplied for second and proceeding printing operations.

Abstract: A stencil printing machine includes a drum which is rotatable and has an outer peripheral wall formed by an ink impermeable member and in which a stencil sheet is mounted on a surface of the outer peripheral wall. An ink supply device has an ink supply unit at a printing position upstream of a maximum printing area of the outer peripheral wall of the drum and supplies ink on the surface of the outer peripheral wall from the ink supply unit. A pressure roller presses a fed print medium onto the outer peripheral wall.

Abstract: A stencil printing machine having an exfoliation suction apparatus including a case having a guide plate at its upper face, a suction force generating portion provided at the case and an exfoliation suction port provided at one end portion of the guide plate for constituting suction force for exfoliating print sheet from a printing drum by suction force by the suction force generating portion in which the exfoliation suction port is arranged to be proximate to a press roller orthgonally to a center line of a squeegee roller intersecting with an axis line of the printing drum and on a lower side of a reference line passing through a position of bringing the press roller and into press contact with the printing drum.

Abstract: A stencil printing machine includes a drum which is rotatable and has an outer peripheral wall formed by an ink impermeable member and in which a stencil sheet is mounted on a surface of the outer peripheral wall. An ink supply device has an ink supply unit at a printing position upstream of a maximum printing area of the outer peripheral wall of the drum and supplies ink on the surface of the outer peripheral wall from the ink supply unit. A pressure roller presses a fed print medium onto the outer peripheral wall.

Abstract: A stencil printing machine having an exfoliation suction apparatus including a case having a guide plate at its upper face, a suction force generating portion provided at the case and an exfoliation suction port provided at one end portion of the guide plate for constituting suction force for exfoliating print sheet from a printing drum by suction force by the suction force generating portion in which the exfoliation suction port is arranged to be proximate to a press roller orthgonally to a center line of a squeegee roller intersecting with an axis line of the printing drum and on a lower side of a reference line passing through a position of bringing the press roller and into press contact with the printing drum.