Nexpress Solutions, Inc.

Eastman-kodak Company

Deere + Company

Heidelberger Druckmaschinen Ag

Patrick Metzler

Karlheinz Walter Peter

Christopher B Liston

Heiko Hunold

Ingo Klaus Dreher

Ralph Petersen

Stefan Schrader

John R Thompson

Christian Compera

Robert Michael Peffer

Donald Calvin Buch

Rolf Spilz

Werner Flohr

Ingo Klaus Michael Dreher

Stefan Theden

Walter Dworschak

Anton Rodi

Rodney Ray Bucks

Thomas Allen Henderson

Frank Pierel

Uwe Vollmar

Gerhard Bartscher

Dieter Karl-Heinz Dobberstein

Michael Kowalczyk

G&uuml;nther Voss

Stephan Walter Pareigis

Michael Mordhorst

Michael Höh

Paul Weiss

Peter Schulz

Carsten Sch&ouml;nfeld

Christian Friedrich Engeln

A system for determining the relative position of first and second farm vehicles, each equipped with a satellite-supported position sensing device. A data transmission link transmits position data between the vehicles, and a computer on one of the vehicles determines data with respect to the relative position of the vehicles. A control device responsive to satellite signal quality assures that the two position sensing devices operate in the same reception modes for improved accuracy.

System for determining the relative position of a second farm vehicle in relation to a first farm vehicle

An engine-driven vehicle/implement coupling system includes a mechanical coupling and one or more electronic and/or hydraulic connections. A coupling condition monitoring system includes one or two electronic control units, sensors for sensing a coupling condition of the electronic and/or hydraulic connection, and a sensor on the mechanical coupling for generating a signal representing a coupling condition of the mechanical coupling. Sensor signals are transmitted to the electronic control unit which, in response prevents erroneous coupling or uncoupling and prevents drive-away of the vehicle or implement.

Vehicle/implement coupling condition monitoring system

A method and control device for determining a register error, whereby at least one register mark is printed and at least one sensor records the register mark, whereby the sheet edge of the sheet is recorded by the sensor, and the register error is determined from the sensor data and the target data.

Method and control device for determining a register error

The invention relates to a method and apparatus for minimizing the influence of register differences in multicolor printing, in particular in digital printing processes, register values () in the transport direction (), which are different transversely with respect to this direction being set to a value between the extremes ('). The invention is intended to carry out a development such that the influence of register differences on the image quality can be minimized reliably and to a great extent. This is achieved by a number of individual values of the register values () being measured and an average value (&#x2032;) being determined from these and brought into alignment with the average value (&#x2032;) from at least one further color printing unit (&#x2032;&#x2033;).

Method and apparatus for minimizing the influence of register differences

A method and a control device for prevention of registration errors. In the current state of the art, a control circuit of a control device eliminates registration errors. A first sensor detects a sheet before a printing module and a second sensor detects the sheet after the printing module, an actual number of pulses is counted between the detection of the sheet by the first sensor and by the second sensor and this actual number of pulses is fed into a closed-loop control system as an actual parameter, the actual number of pulses is compared with a reference number of pulses, which represents a reference parameter of the closed-loop control system, a control signal of the closed-loop control system is determined from this comparison, and a number of pulses is conducted into a controlled process of the closed-loop control system, which number of pulses is in direct relation to the current sheet to be printed in the printing module.

Method and control device for prevention of image plane registration errors

A control device for removing register errors on printing machines. The control device for controlling the printing drums for a printing machine has at least a first sensor to detect sheets on a conveyor belt and printing drums to apply printing images, whereby a spacing, which is defined between a position on the conveyor belt determined by a signal of the first sensor and the nip of a printing cylinder on the conveyor belt, corresponding to a whole-numbered multiple of the circumference of a nip roller.

Control device and method to prevent register errors

Printers wherein a snub pulley gripping the conveyor belt from below changes contact force, a first register error occurs; and due to change of the spacing between the image lines on the sheet change, a second register error occurs. To prevent the first register error, time-lags of the first start signals (START OF FRAME) for the application of image lines are changed; and to prevent a second register error, time-lags of the second start signals (START OF LINE) for the application of image frames are changed.

Method and control device for preventing register errors

A method and device for register mark setting of a printing press for multicolor printing. A calibration run is used for the calibration of register frames, and the correction data produced by the calibration of the frame is used to calibrate the register mark keeping of individual lines or areas of lines from the printing modules of the printing press, whereby the data of the register marks are detected to determine the correction data and are set in relationship to positions of an illustration drum and/or a separation drum.

Method and illustration device for register mark setting

Device for detecting the location of an edge of a transparent material, web edge control and printing press

Determining and correcting registration errors, which are caused by the rotational speed of a print cylinder changing because of a sheet passing between the print cylinder and a sheet transport conveyor belt. At least one first registration mark is applied onto the conveyor belt prior to a sheet being transported thereby, and at least one second registration mark is applied onto the conveyor belt after the transported sheet. By the detection of the first registration mark and the second registration mark, a calculation of a timing number between the detection of the first registration mark and the second registration mark can be made. The calculated timing number is compared to a target value to determine any error due to change in angular velocity of the print cylinder due to engagement with the sheet.

Process and device for determining registration errors

Detection of crosstrack aberrations of registration marks in order to prevent color errors during multicolor printing. The detection of crosstrack aberrations of registration marks is with a single sensor which detects each triangle as a registration mark per color selection, whereby the triangles are each assigned a color of the multicolor printing. Sensor values are detected and formed from these differential values.

Method and device for detecting and correcting chromatic aberrations in multicolor printing

A printing unit ( ) for a printing machine, having an image cylinder ( ), an image generating device ( ) for setting an image on the peripheral surface ( ) of the image cylinder ( ), and an image transfer cylinder ( ) which transfers the image from the image cylinder ( ) to a printing substrate ( ), the image transfer cylinder ( ) having a resilient cover ( ) which exhibits a deformation ( &prime;) in the force transmission areas ( ), and a transport belt ( ) that carries the printing substrates ( ) and is supported by a back-pressure cylinder ( ) driving the image transfer cylinder ( ) and the latter driving the image cylinder ( ), by friction. The printing unit has a continuous image cylinder speed (v ). This is achieved by the back-pressure cylinder ( ) being mounted such that it can be displaced with respect to the image transfer cylinder ( ) with a travel-dependent pressing force (F ) which is dimensioned such that the speed of the image cylinder ( ) remains constant with respect to changes in the effective radius (r) for driving the image transfer cylinder ( ).

Printing unit for a printing machine

A process and printing machine for determining registration errors and correcting therefore. At least one first registration mark is applied onto a conveyor belt for transporting a sheet, and at least one second registration mark is applied onto the sheet adjacent to the first registration mark. The first registration mark and the second registration mark are detected, the distance between the first registration mark and the second registration mark is calculated, and the difference between the calculated distance and a distance without different speeds of the conveyor belt and the sheet (a target value) is calculated.

Process and printing machine for determining registration errors

A method and apparatus for setting register on a multicolor printing machine ( ) having color printing units ( ) assigned to various printing inks, at least one image cylinder ( ), image production equipment ( ) for producing color separations ( ) on the at least one image cylinder ( ) and a carrier ( ) for printing substrates ( ). An assignment of the image production points ( ) on the at least one image cylinder ( ) is carried out in order to achieve coincidence of register between the color separations ( ) in the print, by both the production of the image starts ( ) and the production of areas ( ) of the color separations ( ) set on the basis of the print and the evaluation of register marks ( ).

Method and apparatus for setting register on a multicolor printing machine

Correcting register faults in a multicolor printing machine having a number of items of equipment for the digital production of color separations, wherein correction values are determined and assigned to angular positions of at least one image cylinder and, as a result, taken into account for the control of the production of the color separations on the image cylinder. Correction values are to be made available for the correction of register faults, which, with a fine graduation, make it possible to assign them to angular positions of machine elements in a repeatable way. This is achieved by determining circularity errors of machine elements which have an influence on the register, assigned to their angular positions and, from these, the correction values for the control of the production of the color separations on the at least one image cylinder being determined.

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Gettorf, Germany

Patrick Metzler