A printing apparatus applies ink to a surface of a printing plate in the shape of a predetermined pattern and then transfers the ink to a substrate. The printing apparatus includes: an image recording section that applies the ink to the surface of the printing plate; a plate surface observation unit that acquires information about the surface of the printing plate; a storage section that stores information about a reference shape serving as a reference of the surface of the printing plate; and a determination section that compares the information about the reference shape stored in the storage section with the information about the surface of the printing plate, which is obtained by the plate surface observation unit, and determines whether or not the surface of the printing plate to which the ink has been applied is present in a predetermined range of the reference shape.

A method for controlling a drive of a machine having at least one first roll element, which rolls with a surface on a counter surface at least in subintervals of a revolution cycle with the action of a contact force under elastic deformation, that includes a speed correction method, which automatically compensates for deformation-related deviations of the peripheral velocity of the first roll element by way of an adaptation of the setpoint value for the velocity of the first roll element, and a retrospective method, which automatically compensates for deviations of the speed consistency of the first roll element within a revolution cycle by applying a correction signal determined from the curve of a control variable, in particular an actual velocity or actual position of the first roll element, in a preceding revolution cycle or in multiple preceding revolution cycles, are applied in combination.

A method for controlling a drive of a machine having at least one first roll element, which rolls with a surface on a counter surface at least in subintervals of a revolution cycle with the action of a contact force under elastic deformation, that includes a speed correction method, which automatically compensates for deformation-related deviations of the peripheral velocity of the first roll element by way of an adaptation of the setpoint value for the velocity of the first roll element, and a retrospective method, which automatically compensates for deviations of the speed consistency of the first roll element within a revolution cycle by applying a correction signal determined from the curve of a control variable, in particular an actual velocity or actual position of the first roll element, in a preceding revolution cycle or in multiple preceding revolution cycles, are applied in combination.

A measurement apparatus for measuring values for color adjustments in a print technique includes a measurement instrument including a measurement value detecting device at an arbitrary measurement point, a movement device, a reference coordinate calculation device, a measurement coordinate calculation device, and a computation device. The reference coordinate calculation device calculates a measurement point reference coordinate value. The measurement coordinate calculation device compares both origins to calculate a corrected value relative to the coordinate system of the reference-image, and corrects the position of the measurement origin based on the corrected value to correct the reference coordinate value and calculates a measurement coordinate value in the coordinate system of the measurement-image corresponding to the measurement point of the reference-image. The computation device calculates information for comparing and evaluating the measurement value acquired at the measurement point of the reference-image and the measurement value acquired at the measurement point of the measurement-image.

A method of correcting measured image data deviations of an image inspection system determining image data using a single measuring head and image measuring unit, by using a computer, includes measuring color spectrums of color fields using the head and unit, creating a color set from color spectrums of the head and unit, calculating spectrums from overprinting color combinations for the head and unit using a color model and the respective color set, calculating Lab color values for the head and unit based on spectrums of the head and unit, determining deviations between color values of the head and unit for supporting points, adding determined deviations to the color values of the measuring unit at the supporting points, creating an ICC profile based on corrected color values of the measuring unit for converting imprecise measured values thereof into accurate color values, and correcting imprecisely measured values of the measuring unit using the profile.

A method for testing the reliability of an error detection of an image inspection method by using a computer includes producing a defective test image by superposing specific error elements on an error-free reference image, carrying out the image inspection method with the defective test image, comparing the errors found by the image inspection method with the error set to be expected with the aid of the known errors added to the test image, and evaluating the reliability of the image inspection method with the aid of the difference between found and expected errors.

A system and control method for embossed-in-register of a sheet is provided. The system comprises a printed film winding/releasing mechanism, a film laminating roller and a pattern roller spaced from the film laminating roller, wherein the printed film is provided with first identifiers at intervals, and the pattern roller is provided with second identifiers at intervals; the system further comprises: a color code sensing mechanism configured to detect the first identifiers, an encoder configured to detect a rotation position of the pattern roller, and a control system; the control system comprises a storage unit, a data acquisition unit and a control unit; wherein, the control unit is configured to calculate a deviation of a pattern position, corresponding to a current first identifier, of the printed film and a pattern position, corresponding to a current second identifier, of the pattern roller in a same pattern, and generating a control signal of the pattern roller based on the deviation. According to the present application, a high-precision adjustment signal of the pattern roller may be generated, an EIR effect is guaranteed, the outturn percentage is increased, and the production cost is reduced.

A system and control method for embossed-in-register of a sheet is provided. The system comprises a printed film winding/releasing mechanism, a film laminating roller and a pattern roller, wherein the printed film is provided with first identifiers at intervals; the system further comprises: a camera configured to acquire an image of the printed film, an encoder configured to detect a rotation position of the pattern roller, and a control system; the control system comprises a storage unit, a data acquisition unit and a control unit; wherein, the control unit is configured to identify a position of an identifier based on the image of the printed film, identify a rotation position of the pattern roller based on information fed back by the encoder and generate a rotation control signal of the pattern roller based on a difference of position information of the identifier and position information of the pattern roller so as to adjust a rotation speed of the pattern roller. By using the EIR solution provided by the present application, the printed film is not required to be widened, and an existing structure and effective area of the printed film are effectively used, so that the universality of the printed film is improved, the outturn percentage may be guaranteed, and the production cost cay be reduced.

In some examples, a sheet processing machine includes at least one sensor device that includes at least two sensors configured as a camera. The sheet processing machine further includes at least one infeed system. The at least one sensor device is configured to control, by open-loop control and/or closed-loop control, at least one servo drive of the infeed system as a function of at least one sheet of sheets being detected by the at least two sensors. The at least two sensors are configured to selectively detect at least one edge and/or printing mark of the sheets. Some examples likewise relate to a method for controlling, by open-loop control and/or closed-loop control, at least one component of a sheet processing machine.

A rotary screen transfer printing machine and a control system thereof. The rotary screen transfer printing machine having a feeding unit, a printing unit, a drying unit, and a receiving unit; the printing unit has at least one rotary screen transfer printing assembly and a guide belt assembly; each rotary screen transfer printing assembly has a rotary screen plate roller and a transfer roller; the rotary screen plate roller is close to the transfer roller; the transfer roller is seamlessly coated with rubber or a resin having good affinity for a water-based ink. A control system includes: a motion controller; a conveying synchronization module, used for controlling the feeding unit, the printing unit, the drying unit, and the receiving unit to synchronize the conveying speeds of the four units; and a rotary screen transfer printing synchronization module.