Abstract: A digital printing apparatus including a sheet supply device, printing cylinder, inkjet nozzle portion, sheet delivery device, and conveyance devices. The sheet supply device supplies sheets one by one at a predetermined period. The printing cylinder includes at least one gripper device that grips and holds the sheet, and conveys the sheet while one edge of the sheet supplied from the sheet supply device is held by the plurality of gripper devices. The inkjet nozzle portion discharges ink droplets onto the sheet. The conveyance devices include a plurality of gripper devices including one reversing gripper device that grips and holds the other edge of the sheet, and conveys the sheet printed on one surface, which is received from the printing cylinder in a double-sided printing mode. The sheet is turned by reversing the obverse/reverse surface of the sheet by the reversing gripper device in the process of conveyance.

Abstract: A sheet reversing device including a first conveyance unit, second conveyance unit, third conveyance unit, and sheet pressing member. The first conveyance unit includes a first holder, and a support surface that supports the sheet, and conveys the sheet with an edge held by the first holder, and its entire surface supported by the support surface. The second conveyance unit includes second holders, which convey the sheet. The third conveyance unit is supported to be swingable between a reception position at which the third conveyance unit receives the sheet, and a transfer position at which the third conveyance unit transfers the sheet to the second conveyance unit. The third conveyance unit includes a third holder, and conveys the sheet held by the third holder. The sheet pressing member presses the sheet, transferred from the third conveyance unit to the first conveyance unit, against the first conveyance unit support surface.

Abstract: A sheet conveyance device including first to third conveyance units, independent driving unit, device driving unit, and control unit. The first conveyance unit includes a first holder that holds one edge of a sheet, and conveys the sheet. The second conveyance unit includes a second holder that holds one edge of the sheet, and conveys the sheet. The third conveyance unit is supported to be swingable between a reception position at which it receives the sheet from the first conveyance unit, and a transfer position at which it transfers the sheet to the second conveyance unit. The third conveyance unit includes a third holder that holds the other edge of the sheet conveyed by the first conveyance unit, and conveys the sheet held by the third holder. The independent driving unit drives the first conveyance unit. The control unit adjusts the speed at which the sheet is conveyed.

Abstract: A screen printing unit equipped with a rotary screen apparatus comprises a cylindrical screen rotatably supported so as to be brought into contact with a rotatable impression cylinder. Multiple small holes are formed in the circumferential surface of the screen, and are filled up with a coating material. Some of the holes corresponding to a pattern not being filled with the coating material, and a special ink stored inside the screen can be supplied to a sheet held on the outer circumferential surface of the impression cylinder so as to form a shape corresponding to the pattern. The small holes are formed only in an area of the screen in the circumferential direction thereof extending from a position corresponding to the downstream-side end of the sheet in the sheet-conveying direction to a position corresponding to the upstream-side end of the sheet in the sheet-conveying direction.

Abstract: This invention discloses a registration method for a printing press. The method includes the steps of storing the conditions of a sheet, and the position of at least one of a plurality of plate cylinders at the time of final printing in a storage unit in association with each other. The plurality of plate cylinders are configured to print images of different colors. The method also includes the steps of, in printing on a sheet to be printed, searching the information stored in the storage unit for a sheet with conditions, at least some of which are common to those of the sheet to be printed, and moving at least one plate cylinder to the position associated with the found conditions of the sheet. A registration apparatus for a printing press is also disclosed.

Abstract: A multi-feed detection device includes: an arm member supported swingably and configured to come into contact with a traveling sheet; and detecting means for detecting whether a plurality of the traveling sheets are overlapped and fed, on the basis of swing of the arm member. The detecting means includes: a detection plate attached to an arm; and a non-contact sensor configured to measure, in a non-contact manner, the positional relation between the non-contact sensor and the detection plate, the positional relation being changed by swing of the arm.

Abstract: A liquid transfer apparatus includes a supply cylinder and viscosity reducing agent supply unit. The supply cylinder comes into contact with a transfer target body and supplies a transfer liquid to the transfer target body. The viscosity reducing agent supply unit supplies a viscosity reducing agent which reduces a viscosity of the transfer liquid to the supply cylinder after the apparatus emergently stops and before the supply cylinder starts transfer.

Abstract: A liquid transfer apparatus includes a supply cylinder and viscosity reducing agent supply unit. The supply cylinder comes into contact with a transfer target body and performs transfer by transferring a transfer liquid to the transfer target body. The viscosity reducing agent supply unit supplies a viscosity reducing agent which reduces a viscosity of the transfer liquid to the supply cylinder during transfer.

Abstract: This invention discloses a sheet processing apparatus including a sheet supply device, a first cylinder which includes at least one gripper device, a processing device, a sheet discharge device, and conveyance devices. The conveyance devices include a plurality of gripper devices including at least one reversing gripper device. The conveyance devices also include a second cylinder and reversing swing arm shaft pregripper. The second cylinder grips and conveys one edge of the sheet by one gripper device of the plurality of gripper devices. The reversing swing arm shaft pregripper is supported to be swingable between the first cylinder and the second cylinder, receives by the reversing gripper device the other edge of the sheet conveyed by the second cylinder, and transfers the received other edge of the sheet to the gripper device of the first cylinder by a gripping change.

Abstract: This invention discloses an apparatus for controlling ink supply amount/registration adjustment in a printing press. The apparatus includes a base, sensor head, sensor head moving unit, first detector, second detector, and control unit. The sensor head moving unit includes a upward/downward position adjusting unit which adjusts the upward/downward position of the sensor head. The second detector detects the upward/downward position of a color bar when color matching data of a color patch of each color in the color bar is measured by the first detector. The upward/downward position adjusting unit adjusts the upward/downward position of the sensor head based on the upward/downward position of the color bar, which is detected by the second detector. A method of controlling ink supply amount/registration adjustment in a printing press is also disclosed.

Abstract: This invention discloses a numbering and imprinting machine including a number cylinder, moving inker, first cleaning device, second cleaning device, inker position detector, and control device. The number cylinder includes at least one numbering device. The moving inker includes a number inker which supplies ink onto the number cylinder, and is movable between a printing position at which the number inker comes into contact with the number cylinder, and a retraction position at which the number inker separates from the number cylinder. The first cleaning device cleans the number cylinder. The second cleaning device cleans the number inker. The inker position detector detects the position of the moving inker. When the inker position detector detects that the moving inker is set at the printing position, the control device rotates the number cylinder, drives the number inker and controls cleaning operations by the first cleaning device and the second cleaning device.

Abstract: A sheet processing apparatus includes a first cylinder, second cylinder, third cylinder, first driving device, second driving device, third driving device, gap amount input device, and controller. The first cylinder receives a sheet from an upstream transport cylinder and holds the sheet. The second cylinder is disposed to oppose the first cylinder and prints/coats the sheet held by the first cylinder. The third cylinder is disposed to oppose the first cylinder and supplies ink/varnish to a circumferential surface of the first cylinder. The first driving device adjusts a gap amount between the first cylinder and upstream transport cylinder. The second driving device adjusts the position of the second cylinder with respect to the first cylinder. The third driving device adjusts the position of the third cylinder with respect to the first cylinder. The gap amount input device inputs the gap amount between the first cylinder and upstream transport cylinder.

Abstract: A powdering device includes: a powder placing member having a placing section on which a powder fed from a storage container is placed; a first scraping member for scraping the powder on the placing section of the powder placing member, so that a constant amount of the powder remains on the placing section; and a second scraping member for scraping off the resultant constant-amount powder remaining on the placing section, and the powdering device transfers the scraped powder with an air flow, and sprays the powder thus transferred onto a printed sheet.

Abstract: Disclosed is an inspection apparatus which avoids a defective item from being mixed with good items, even when a marking device does not work appropriately and a mark for identifying a good item and a defective item cannot be applied. For this purpose, the apparatus is provided with a quality inspection device (6) for determining whether a print portion (3) of a work to be printed (1) whereon a plurality of print portions (3) are printed is a good item (3a) or a defective item (3b), and an inkjet printer (9) as a marking device for printing a mark (13) on the print portion (3) which is identified as a good item (3a) by the quality inspection device (6).

Abstract: A method and an apparatus for detecting a folded corner of a sheet in a sheet-fed printing press automatically select which of a pair of folded corner detectors provided integrally with right and left side lay devices should be used, in accordance with a setting of which of the side lay devices is to be used, thereby making it possible to raise the rate of operation and lightening the burden on an operator. When the left-hand side lay device is used, a first left-hand end detector supported in the left-hand side lay device and a second right-hand end detector supported in the right-hand side lay device are actuated. When the right-hand side lay device is used, a first right-hand end detector supported in the right-hand side lay device and a second left-hand end detector supported in the left-hand side lay device are actuated.

Abstract: An intaglio printing press includes a feeder, an intaglio printing unit, and a delivery unit and is configured to perform intaglio printing on a paper sheet W having been subjected to printing in a previous step. The intaglio printing press comprises a first inspection camera provided between the feeder and the intaglio printing unit and configured to inspect one surface of the paper sheet having been subjected to the printing in the previous step.

Abstract: Provided is a combination printing press including a collect-printing unit and an offset printing unit configured to perform offset printing on a paper sheet subjected to collect-printing by the collect-printing unit. The collect-printing unit has a movable inking unit disposed below a paper transport route, and is configured to perform collect-printing on a lower surface of a paper sheet. The offset printing unit includes lower surface offset printing subunits configured to perform offset printing on a lower surface of a paper sheet subjected to the collect-printing by the collect-printing unit. The impression cylinder of a collect-printing subunit and the impression cylinder of the lower surface offset printing subunit are connected by a single transfer cylinder.

Abstract: A device is presented for adjustment of height in a transport cylinder gripper pad. The device includes a first notch, a gripper pad which is equipped in the first notch, a gripper pad bar, a first adjusting bar, a biasing member which biases the bottom surface of the gripper pad bar against the upper surface of the first adjusting bar, a drive shaft, and a driving unit which moves the drive shaft in the cylinder axial direction. A first connecting portion is interposed between the drive shaft and the first adjusting bar, and moves the first adjusting bar in the cylinder axial direction as the drive shaft moves.

Abstract: A sheet processing apparatus includes a first cylinder, second cylinder, third cylinder, first driving device, second driving device, third driving device, thickness input device, and controller. The first cylinder receives a sheet from an upstream transport cylinder and holds the sheet. The second cylinder is disposed to oppose the first cylinder and prints/coats the sheet held by the first cylinder. The third cylinder is disposed to oppose the first cylinder and supplies ink/varnish to a circumferential surface of the first cylinder. The first driving device adjusts a gap amount between the first cylinder and the upstream transport cylinder. The second driving device adjusts the position of the second cylinder with respect to the first cylinder. The third driving device adjusts the position of the third cylinder with respect to the first cylinder. The thickness input device inputs the thickness of the sheet.

Abstract: Provided is a quality inspection apparatus including: gripper units provided to each delivery chain, each gripper unit configured to hold an end portion of a sheet; an arc-shaped track portion provided in a part of a movement track of the gripper units and formed by the movement track; an inspection unit installed at an opposite side of the arc-shaped track portion from an arc center of the arc-shaped track portion; and a vacuum cylinder installed at the same side of the arc-shaped track portion as the arc center. In the apparatus, while running along the arc-shaped track portion, the sheet is inspected by the inspection unit under a guidance of the vacuum cylinder.