A method for alignment of a pattern printed on a material for an absorbent article by a rotary printing device, including providing a first composition from a first chamber; providing a second composition including a detectable agent from a second chamber; wherein the first composition from the first chamber and the second composition from the second chamber are supplied to the same anilox roller or directly to the same rotary printing cylinder; and printing the first and second compositions on the material for an absorbent article by a rotary printing cylinder.

In some examples, a print control strip includes at least one control patch configured as an element for color management. The element for color management may be configured to measure a color density and/or at least one spectral value and/or an area of coverage of individual printed printing colors. The print control strip further includes at least one control patch configured as a printing mark. The printing mark is configured for aligning a substrate in a transport direction and/or in a transverse direction. Additionally, the print control strip includes at least one control patch configured as a plate recognition patch. The plate recognition patch is configured to assign at least one printing color used to a printing plate and/or to an application mechanism and/or is configured for such assignment.

A printed substrate is provided. The printed substrate includes a plurality of color bars printed on a substrate, a space between each of the plurality of color bars and an image printed in the space between at least two of the color bars. An embedded color bar and a method of printing an embedded color bar are also provided.

A method of adjusting the print repeat length of a print image in a multicolor rotary printing machine, particularly a flexographic printing press, having a central impression cylinder, a first plate cylinder, and a second plate cylinder, including modifying the peripheral velocity of the first plate cylinder and the peripheral velocity of the second plate cylinder during printing operation, relative to the peripheral velocity of the central impression cylinder, and adjusting the longitudinal register of the first plate cylinder having the modified peripheral velocity and the longitudinal register of the second plate cylinder having the modified peripheral velocity.

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.

The machine comprises: a plurality of printing units each of which has a printing cylinder movable so as to allow adjustment of the position of the image printed by that cylinder in two perpendicular adjustment directions relative to the web of printing material; first manually-operated adjustment means arranged to allow a user to adjust manually the position of each printing cylinder; image acquisition means arranged to acquire images of register marks printed by the printing units along one or both sides of the web of material; and display means arranged to show, on an enlarged scale, the images acquired by the image acquisition means, so as to allow the user to detect any misalignments between the register marks and to properly adjust the position of one or more printing cylinders to clear said misalignments. The image acquisition means comprise a plurality of cameras each of which is arranged to frame.

A device and method for the control and management of the printing parameters of a printing machine, particularly with a plurality of consecutive printing processes, is presented. The device and method include at least one video camera associable with a printing and conversion assembly and movable along a motorized guide in order to acquire a print medium. An image processor is functionally associated with the video camera to search, recognize and measure on the image of the print medium acquired by the video camera the printing values of at least one reference register mark reproduced on the print medium. The image processor is functionally connected to a unit for the actuation of the printing and conversion assembly to correct and restabilize the printing values according to the difference between the printing values measured by the image processor and the desired theoretical printing values.

In some embodiments, a printer system may include a location sensor, a motor and driver assembly configured for adjusting a print position of a subsequent image on a substrate having a first side and a second side and at least one wireless communication device, and an optical sensor. Adjustment of the print position may be based on detection of the wireless communication device using the location sensor and a subsequent determination of whether the corresponding printed image is properly aligned with the wireless communication device using the optical sensor.

In some examples, a print control strip includes at least one control patch configured as an element for color management. The element for color management may be configured to measure a color density and/or at least one spectral value and/or an area of coverage of individual printed printing colors. The print control strip further includes at least one control patch configured as a printing mark. The printing mark is configured for aligning a substrate in a transport direction and/or in a transverse direction. Additionally, the print control strip includes at least one control patch configured as a plate recognition patch. The plate recognition patch is configured to assign at least one printing color used to a printing plate and/or to an application mechanism and/or is configured for such assignment.

A method for alignment of a pattern printed on a material for an absorbent article by a rotary printing device, including providing a first composition from a first chamber; providing a second composition including a detectable agent from a second chamber; wherein the first composition from the first chamber and the second composition from the second chamber are supplied to the same anilox roller or directly to the same rotary printing cylinder; and printing the first and second compositions on the material for an absorbent article by a rotary printing cylinder.