Abstract: An image inspection apparatus is capable of inspecting an image on a print sheet as an inspection object with high accuracy while conveying the print sheet from an upstream conveyance unit to a downstream conveyance unit. The image inspection apparatus inspects the print sheet conveyed at a first conveyance speed with a first conveyance unit of a printing device, with a first inspection unit, while conveying the print sheet at a second conveyance speed with a second conveyance unit of an inspection device. The first inspection unit is provided in a position downstream of an intermediate position between the first conveyance unit and the second conveyance unit by a length longer than a half of the length of the print sheet. Even when the first conveyance speed and the second conveyance speed are not substantially the same, no disorder occurs in the image read with the first inspection unit.

Abstract: An image inspection device has a first suction conveyance unit which is arranged on the upstream side with a conveyance surface as an upper surface, a second suction conveyance unit which is arranged on the downstream side with a conveyance surface as a lower surface to make the conveyance surface continuous from the upstream side, a first inspection section which inspects an image on a front surface of an inspection object which is conveyed to the first suction conveyance unit and a second inspection section which inspects an image on a back surface of the inspection object which is conveyed to the second suction conveyance unit. The inspection object is conveyed in a state of being sucked and held on the first and second suction conveyance units and therefore is stable in position and posture in conveyance and an expected accuracy is maintained in inspection performed by the first and second inspection sections.

Abstract: A hanging prevention roller is installed between a first suction conveyance unit on an upstream side and a second suction conveyance unit. When an inspection object is sent from the first suction conveyance unit into the second suction conveyance unit, a top edge of the inspection object abuts on and runs on the hanging prevention roller before the top edge of the inspection objects hangs down under its own weight or due to downward curling and so forth, the top edge is sandwiched between the roller and the second suction conveyance unit, and thereby stable suction conveyance is started without delay.

Abstract: An image inspection apparatus is capable of inspecting an image on a print sheet as an inspection object with high accuracy while conveying the print sheet from an upstream conveyance unit to a downstream conveyance unit. The image inspection apparatus inspects the print sheet conveyed at a first conveyance speed with a first conveyance unit of a printing device, with a first inspection unit, while conveying the print sheet at a second conveyance speed with a second conveyance unit of an inspection device. The first inspection unit is provided in a position downstream of an intermediate position between the first conveyance unit and the second conveyance unit by a length longer than a half of the length of the print sheet. Even when the first conveyance speed and the second conveyance speed are not substantially the same, no disorder occurs in the image read with the first inspection unit.

Abstract: An image inspection device has a first suction conveyance unit which is arranged on the upstream side with a conveyance surface as an upper surface, a second suction conveyance unit which is arranged on the downstream side with a conveyance surface as a lower surface to make the conveyance surface continuous from the upstream side, a first inspection section which inspects an image on a front surface of an inspection object which is conveyed to the first suction conveyance unit and a second inspection section which inspects an image on a back surface of the inspection object which is conveyed to the second suction conveyance unit. The inspection object is conveyed in a state of being sucked and held on the first and second suction conveyance units and therefore is stable in position and posture in conveyance and an expected accuracy is maintained in inspection performed by the first and second inspection sections.

Abstract: A hanging prevention roller is installed between a first suction conveyance unit on an upstream side and a second suction conveyance unit. When an inspection object is sent from the first suction conveyance unit into the second suction conveyance unit, a top edge of the inspection object abuts on and runs on the hanging prevention roller before the top edge of the inspection objects hangs down under its own weight or due to downward curling and so forth, the top edge is sandwiched between the roller and the second suction conveyance unit, and thereby stable suction conveyance is started without delay.

Abstract: A print sheet transfer device has upstream rollers, downstream rollers, and a pair of first and second guide plates movable between a guide position and a release position for a print sheet. When the guide plate is moved from the guide position to the release position, the upstream side of the print sheet held with the upstream rollers is fed in a transfer direction in accordance with the movement. When the downstream side of the print sheet is held with or thrusted against the downstream rollers, a sag is formed in the print sheet between the upstream rollers and the downstream rollers. It is possible to easily perform an operation to remove the print sheet.

Abstract: In a stencil printer, an elastic member is provided on a master conveying path from a roll of master sheet to a master pinch drum. The elastic member is pressed against the master sheet to apply back tension to the master sheet when the master sheet is moved by rotation of the master pinch drum after the leading end of the master sheet has been clamped to the clamp portion of the master pinch drum.

Abstract: A stencil printing machine comprises a feed-per-revolution detecting unit for detecting a feed-per-revolution of the stencil sheet on the basis of the rotation amount of the detecting roller for a given time; and a control unit for calculating a driving speed of the platen roller correspondingly to the feed-per-revolution detected by the feed-per-revolution detecting unit and such a standard feed-per-revolution that the platen roller should be originally transported for the given time, and then controlling the driving unit in the manner that the driving unit rotates the platen roller at the calculated driving speed. Upon stencil-making, the error of the feed-per-revolution of the stencil sheet is corrected and then the driving of the platen roller is controlled.

Abstract: A supporting device is adapted to support a rolled recording sheet. The rolled recording sheet has a flange with a supporting axis on each end portion, and is supported detachably and rotatably through the flange by the supporting device. The supporting device is formed of a pair of holders, each including a main body fixed to a predetermined position, a supporting portion disposed to the main body movably within a predetermined range for supporting the supporting axis of the flange, and an urging device for urging the supporting portion for a side surface of the flange.

Abstract: A stencil discharging apparatus for a stencil printing machine in which a stencil is used, the stencil discharging apparatus includes: a conveyer for conveying the stencil to be discharged; a used-stencil accommodating section having an opening and a stencil accommodating space in which the stencil conveyed by the conveyer is accommodated; and a compressing board pivotally provided, wherein the compressing board presses the stencil accommodated in the stencil accommodating space toward the opposite of the opening of the used-stencil accommodating section in accordance with moving the compressing board in the stencil accommodating space.

Abstract: A stencil printing machine in which a rolled stencil is cut for obtaining a printing stencil of a printing image, the stencil printing machine includes: printing-stencil making section including a thermal head and a platen roller, for making the printing stencil from the rolled stencil held and conveyed by the thermal head and the platen roller; a cutter for cutting the rolled stencil to obtain the printing stencil; and controller for controlling the platen roller such that the front end portion of the rolled stencil separated from the printing stencil by the cutter is moved a predetermined distance backwardly, towards the printing-stencil making section, and then moved forwardly beyond the cutter to a predetermined position.

Abstract: A stencil discharging unit of a rotary stencil printing machine has a feeding unit and a stencil discharging container. The feeding unit has a first feeding means and a second feeding means. The first feeding means that is on the upper side includes groups of pulleys and groups of belts. The second feeding means that is on the lower side includes groups of pulleys and groups of belts. The pulleys in each group are pitched at a predetermined interval in an axial direction. The respective pulleys are supported by support members that are independent of one another. Each support member is mounted on a plate member that has bending resiliency. Springs urge the plate member upward. With the plate member bent, the respective pulleys are displaced independently of one another.

Abstract: To make it possible that the leading end of the stencil proceeds beyond the stencil leading end mounting device toward the stencil exhausting means in the process of exhausting the stencil even when the space required for the open/close operation of the stencil leading end mounting device for mounting the leading end of the stencil to the printing drum of the rotary stencil printer is made small, a snap-up member 84, 86 and 88 is provided adjacent inlet edge of an open/close type clamp member 76 of the stencil leading end mounting device so that the leading end 116 of the stencil released from the clamping by the clamp member 76 in the process of exhausting the stencil is snapped up to the upper side of the clamp member 76.

Abstract: A rotary stencil printing machine includes: stencil making section for processing the stencil sheet to obtain a printing stencil; a printing drum having an outer cylindrical surface and a clamping member which clamps the front end portion of the stencil sheet thus processed by the stencil making section, the printing drum being turned with the front end portion of the stencil sheet clamped with the clamping member to wind the stencil sheet on the outer cylindrical surface thereof; a conveyer for conveying the stencil sheet, which has been processed by the stencil making section, towards the drum; a movable guide which is movable between a standby position and a holding position which are spaced away from each other in a direction perpendicular to the surface of the stencil sheet located between the stencil making section and the drum, the guide moving from the standby position to the holding position, for lengthening a stencil conveying path between the stencil forming section and the clamping member, wherein