49results about "Relief printing" patented technology

The invention relates to the technical field of printing, in particular to a flexo printing machine control method and system based on machine vision. The method comprises the following steps: collecting surface image data of a printed matter in a motion state in real time, separating and identifying a preset printing feature region from the image data, and obtaining geometric feature parameters of the region relative to a reference position; generating a multi-axis cooperative position compensation instruction of the printing unit according to the deviation value of the geometrical characteristic parameter and a preset target characteristic; converting the position compensation instruction into an adjusting parameter of a servo driving system in real time, and dynamically adjusting the pressure of a printing roller of a printing unit and the displacement of a registration mechanism; and synchronously outputting a defect type judgment signal and correlating the adjustment parameter correction value based on the form change of the printing feature region in the updated image data. According to the method, the stability and the adjusting efficiency of the printing quality are improved, and the defects that a traditional method is lagged in response and inaccurate in adjustment are overcome.

A sleeve assembly is disclosed in which a pair of annular end rings are screwed into respective ends of an annular sleeve which includes around its inner surface a compressible liner. In order to create an effective, fluid impregnable seal between the end rings and the sleeve, respective surfaces of both end ring and sleeve are provided with specific complementary groove, chamfer, undercut or channel formations, and prior to screwing insertion of an end ring into a sleeve end, respective surfaces and formations are filled and covered with a viscous but fluent curable gasket forming composition such that amounts of gasket forming composition provided on and continuously around the end ring unite with corresponding amounts of gasket forming composition provided within and completely around corresponding surfaces of the sleeve as and when the end ring is completely screwed into a sleeve end. Thus, when the respective amounts of gasket forming composition provided on end ring and sleeve unite together and then cure, effective rib or band-like rubberised seals are created which extend either or both of: - radially into and within respective axially aligned or adjacent formations provided on exterior and interior surfaces of end ring and sleeve alike, and - axially from within an end surface of the end ring and into some formation, for example a channel excavation, provided within a respective end of the liner adjacent which said end ring end surface becomes disposed when the end ring is fully screwed in place within the sleeve.

The invention relates to a processing machine (01), wherein at least one processing unit (900) in the form of a shaping unit (900) follows at least one processing unit (600) in the form of an application unit (600) in the transport direction (T) of substrate (02), wherein at least one transport unit (700) is arranged between the at least one processing unit (600) in the form of an application unit (600) and the at least one subsequent processing unit (900), the at least one transport unit (700) comprising a plurality of transport elements (701), the transport elements (701) of the plurality of transport elements (701) being arranged one behind the other in the transport direction (T), at least one transport element (701) of the plurality of transport elements (701) being axially adjustable in accordance with the detection of at least one imaging element of a substrate (02) by at least one sensor (704) for substrate alignment. The invention further relates to a method for aligning a substrate (02) in a processing machine (01).

A security device is disclosed, comprising: a substrate having opposing first and second surfaces; on the first surface of the substrate, a surface relief structure formed of one or more cured, at least semi-transparent material(s); and on the second surface of the substrate, a print layer. In at least a first region of the security device in at least part of which the substrate is transparent or translucent, the surface relief structure and the print layer are each defined in accordance with a common image and are in alignment with one another, the surface relief structure exhibiting a first set of feature(s) of the common image and the print layer exhibiting a second set of feature(s) of the common image. The common image is exhibited by the surface relief structure and the print layer in combination with one another and the surface relief structure provides tactility to the common image.

A safety system (12) for an exit module (10) of a converting machine (4), the converting machine for processing of sheet material, the exit module for outlet of a stack (8) of processed sheet material and comprising a conveyor system (16) for transmission of said stack of processed sheet material, the safety system comprising: a presence detection system (22) for detection of an intruding object into an adaptive safety zone (24).

The invention relates to a method for detecting an undesired ink application (set-off) on a substrate sheet in an offset printing press, wherein a measurement image and a reference image are captured by means of at least one camera and a computer-assisted comparison is carried out. The image is acquired in a region of the substrate sheet that is not in contact with the ink.

Primer layers for adhesion of a pressure sensitive adhesive material to a substrate are provided. The primer layer comprises a crosslinked polymer. In some embodiments, the primer layer has an atomic nitrogen content of greater than 6 wt%, and in some a ratio of atomic weight percent of oxygen to nitrogen of less than 3.0. In some embodiments the crosslinked polymer is the reaction product of an amine-functional base polymer such as a polyethylenimine (PEI) and a crosslinker, which may be a polyaziridine crosslinker. Also provided are two-layer constructions comprising the primer layer and a substrate layer; and tapes, such as flexographic plate mounting tapes, comprising the two-layer construction and a pressure sensitive adhesive layer.

This document describes a method for detecting unwanted ink transfer (smearing) on ​​printed sheets in offset printing presses. This method involves capturing a measurement image and a reference image using a camera and performing a computer-aided comparison. The reference image is captured in an area of ​​the printed sheet that does not come into contact with printing ink.

In order to improve the uniformity of the film thickness of the alignment film formed by coating ink (alignment film material) onto the transparent electrode surface constituting the liquid crystal panel, the printing plate (P) has a printing protrusion (2) on the top surface having a plurality of protrusions (3) distributed thereon. The plurality of protrusions (3) are arranged in each column. For each protrusion (3) constituting the column, they are arranged parallel and separated from each protrusion (3) constituting other columns. And for each protrusion (3) constituting other columns, the positions of the protrusions (3) in the direction of arrangement are staggered. The top surface shape of the protrusions (3) is circular. The ratio of the shallowest depth of the gap (4) between the protrusions to the deepest depth of the gap (4) between the protrusions (the shallowest depth of the gap between the protrusions / the deepest depth of the gap between the protrusions) is 0.4 or more.

A method according to the invention for operating a flexographic printing press, comprising a printing cylinder (16) carrying a sleeve (3) with at least one flexographic printing form (5) or a flexographic printing cylinder and an impression cylinder (17), wherein the printing register of the flexographic printing form or the flexographic printing cylinder is adjusted to a further flexographic printing form or to a further flexographic printing cylinder and / or the ink density is adjusted and / or a color inspection is carried out, wherein a sensor (402) is used, is characterized in that, prior to printing, an image (410) of the surface of the sleeve with the at least one flexographic printing form is captured by a camera (400) and the image is subjected to image processing, wherein at least one register mark (310) and / or at least one color measurement field (312) is xy-localized orThe invention enables cost-effective and high-quality printing in industrial flexographic printing. Furthermore, the method according to the invention advantageously enables further automation of the printing process.

The invention relates to a processing machine (01), in which at least one processing unit (600) formed as a coating unit (600) is followed by at least one further processing unit (600, 900) in the conveying direction (T) of a substrate (02), and at least one transport unit (700) is arranged between the at least one processing unit (600) formed as a coating unit (600) and the at least one subsequent processing unit (600, 900), the at least one transport unit (700) having a plurality of transport elements (701) arranged one behind the other in the conveying direction (T), the plurality of transport elements (701) being individually axially adjustable or the plurality of transport elements (701) being axially adjustable in groups. Additionally, the invention relates to another processing machine (01) and to a method for relatively orienting a substrate (02).

A processing machine (01) for processing a substrate (02), wherein at least one alignment section (750) is arranged in front of at least one processing unit (600; 900) of the processing machine (01), wherein the at least one alignment section (750) has at least one first alignment area for aligning a tilt of a substrate (02) and at least one second alignment area for aligning an axial offset of the substrate (02), wherein at least one first sensor (704) for substrate alignment in the transport direction (T) is arranged in front of at least 75% of the transport sections (706) of the at least one alignment section (750), wherein at least one second sensor (704) for substrate alignment along the alignment section (750) is arranged within the at least one second alignment area, characterized in thatthat the alignment areas of the alignment section (750) each have at least two successive transport sections (706) in the transport direction (T), that the at least one sensor (704) for substrate alignment is designed as a sensor capable of detecting at least one imaging element of a substrate (02), that the at least one alignment section (750) has at least one main drive (M) for driving in the circumferential direction at least one transport subsection (707; 708) of the at least two transport sections (706) of the first alignment area, and that the at least one first sensor (704) for substrate alignment is connected to the at least one main drive (M) by means of at least one control unit.

The printing machine comprises the flexographic printing seat mechanism, an unwinding mechanism and a winding mechanism, the unwinding mechanism and the winding mechanism are installed at the two ends of the flexographic printing seat mechanism respectively, the flexographic printing seat mechanism comprises a rack, first guide rails are symmetrically arranged on the rack, a sliding plate is installed on the first guide rails in a sliding mode, and the sliding plate is connected with the winding mechanism. A frame is installed on the sliding plate in a sliding mode, a plate roller and a plate leaning roller are rotatably installed in the frame, an ink fountain is installed in the frame, side frames are installed at the two ends of the ink fountain respectively, an anilox roller, an ink fountain rubber roller and a tool apron are installed between the two side frames, and a scraper used for ink scraping of the anilox roller and the ink fountain rubber roller is installed on the tool apron. Through the flexible adjustment and rapid plate changing functions of the flexographic printing seat mechanism, the flexographic printing machine can adapt to various production modes such as full-rotary high-speed continuous printing and intermittent stepping printing, and meet the production requirements of different processes and batches.

A machine (1) for checking flexographic printing plates, comprising a base (2), a support plane (3), associated with the base (2), for at least one printing plate (4), whose surface characteristics are to be checked and controlled, a control unit (6), and a scanning unit (7) of the surface of the at least one printing plate (4) to be checked. The scanning unit (7) is operationally connected to the control unit (6), and configured to acquire a real image of the at least one printing plate (4) to be checked. The control unit (6) is configured to carry out the comparison between said real image of the at least one printing plate (4), acquired by the scanning unit (7), and the reference image (8) corresponding to the creation file of a printing plate or a plate of multiple printing plates, to avoid assembling erroneous printing plates and related printing tests.

A security device is provided, comprising one or more surface relief structure(s), each formed of one or more cured material(s), the surface relief structure(s) being disposed on a substantially flat substrate and defining a plurality of raised elements spaced from one another, the raised elements corresponding to elements of an image, whereby the plurality of raised elements varies across the surface relief structure(s) so as to exhibit a multi-tonal version of the image. Methods of manufacturing such devices are also disclosed.

This photosensitive resin composition comprises a thermoplastic elastomer (A), a liquid farnesene rubber (B), an ethylenic unsaturated compound (C), and a photoinitiator (D).

A method operates a flexographic printing press. The flexographic printing press includes a printing cylinder carrying a sleeve with at least one flexographic printing forme or a flexographic printing cylinder and an impression cylinder. At least one parameter of the flexographic printing press is set. The sleeve is marked with an ID, the ID is detected in a flexographic printing unit of the flexographic printing press or in the flexographic printing press. Data saved in association with the ID are transmitted to the flexographic printing unit or to the flexographic printing press, and the data are used when the parameter is set. In this manner, a cost-efficient way of producing high-quality prints in an industrial flexographic printing process is obtained. In addition, the method provides further automation of the printing process.

The present invention discloses a printing unit (1) with an automated sleeve change process. A sleeve (40) can be prepared for the next printing job while the current job is running, thereby reducing the changeover time. Also, the printing unit can handle printing sleeves of very different sizes without any special additional adjustments to be made. The printing unit (1) translates the printing roller (102, 202) and the inking roller (8) on a horizontal line (30) to engage and dis-engage the printing roller. The invention is convenient for large printing sleeves because the sleeve can be slipped over a shaft that remains in the unit. The setup results in a very rigid system, which guarantees an excellent printing quality.

The invention relates to a processing machine (01), wherein at least one further processing unit (600; 900) follows at least one processing unit (600) designed as an application unit (600) in the transport direction (T) of substrate (02), wherein at least one transport unit (700) is arranged between the at least one processing unit (600) designed as an application unit (600) and the at least one subsequent processing unit (600; 900), the at least one transport unit (700) having a plurality of transport elements (701), the transport elements (701) of the plurality of transport elements (701) being arranged one behind the other in the transport direction (T), the plurality of transport elements (701) being axially adjustable individually or the plurality of transport elements (701) being axially adjustable in groups. In addition, the invention relates to a further processing machine (01) and to methods for the relative alignment of a substrate (02).

Primer layers for adhesion of a pressure sensitive adhesive material to a substrate are provided. The primer layer comprises a crosslinked polymer. In some embodiments, the primer layer has an atomic nitrogen content of greater than 6 wt %, and in some a ratio of atomic weight percent of oxygen to nitrogen of less than 3.0. In some embodiments the crosslinked polymer is the reaction product of an amine-functional base polymer such as a polyethylenimine (PEI) and a crosslinker, which may be a polyaziridine crosslinker. Also provided are two-layer constructions comprising the primer layer and a substrate layer; and tapes, such as flexographic plate mounting tapes, comprising the two-layer construction and a pressure sensitive adhesive layer.

The present invention concerns an inking system for a flexographic or a rotogravure press. The inking system uses a very small amount of ink (10) coupled with an ink source (6) made of two tanks (62) with two different inks. Thanks to feedback given by measuring the output directly on the printed support, the system mixes the ink in the optimal proportions to ensure an optimal printing quality at any time. It can compensate any effect due to environmental changes like the humidity or the temperature. This system, coupled with a seven colours press allows for the replacement of spot colours in most cases therby saving time and costs.

In order to improve the uniformity of the film thickness of an alignment film formed by applying ink (alignment film material) to the surface of a transparent electrode constituting a liquid crystal panel, a printing plate (P) is provided with a printing protrusion (2) in which a plurality of protrusions (3) are distributed and formed on the top surface, the plurality of protrusions (3) are arranged in each row, and each of the protrusions (3) constituting the row has a thickness greater than that of the ink (alignment film material). And a plurality of protrusions (3) arranged parallel to and spaced apart from each of the protrusions (3) constituting the other row, and arranged so that the positions in the direction in which the protrusions (3) are arranged are offset with respect to each of the protrusions (3) constituting the other row, the protrusions (3) having a circular top surface shape, and the protrusions (3) having a circular bottom surface shape. The ratio of the shallowest depth of the gap portion (4) between the protrusions to the deepest depth of the gap portion (4) between the protrusions (the shallowest depth of the gap portion between the protrusions / the deepest depth of the gap portion between the protrusions) is 0.4 or more.

The invention relates to a method for operating a printing press for flexographic printing, in which a web (2) made of a substrate is unwound, conveyed and guided through at least two double printing units (10) of the printing press (1), each of the double printing units (10) comprising at least one counter pressure cylinder (20) and two impression cylinders (30) for flexographic printing. The back pressure rollers (20) are respectively driven by independent motors (50) to rotate; the impression cylinders (30) are respectively driven to rotate by independent motors (50); a computer (60) of the printing press (1) calculates at least two virtual drive shafts (61); a computer controls each of the motors (50) using one of the virtual drive shafts (61). The invention advantageously enables a flexographic printing machine to be operated in a high-productivity and flexible manner. The invention can be used, for example, for flexographic printing machines for processing webs for packaging printing in the industry.

The application discloses a relief printing device and belongs to the technical field of paper printing, which comprises a mounting frame, a printing roller rotatably mounted on the mounting frame, a roller ink roller arranged on one side of the printing roller, an abutting roller arranged on the other side of the printing roller, a ink transmission roller arranged between the roller ink roller and the printing roller, the ink transmission roller capable of abutting against the roller ink roller and the printing roller, a driving mechanism for driving the roller ink roller and the ink transmission roller to rotate mounted on the mounting frame, a jacking piece for jacking up the ink transmission roller mounted on the mounting frame, a jacking track for sliding cooperation with the ink transmission roller formed on the mounting frame, and a first accommodating groove for clamping cooperation with a rotating shaft of the ink transmission roller formed on an end of the jacking track close to the printing roller. The application has the effect of reducing environmental pollution caused by ink.

A method for operating a printing machine for flexographic printing, wherein a web of printing stock is unwound, transported and thereby guided through at least two double printing units of the printing machine. Each of the double printing units has at least one impression cylinder and in each case two printing cylinders for flexographic printing. The impression cylinders are each driven in rotation by a separate motor and the printing cylinders are each driven in rotation by a separate motor. A computer of the printing machine calculates at least two virtual drive axes and the computer controls the motors in each case using one of the virtual drive axes. The method is particularly suitable for high-production and flexible processing in industrially operated, web-processing flexographic printing machines for packaging printing.

A security device is disclosed, comprising: a substrate having opposite first and second surfaces; a surface relief structure on the first surface of the substrate, the surface relief structure being formed from one or more cured, at least semi-transparent materials; a printed layer on the second surface of the substrate. In at least a first region of the security device, the substrate is transparent or translucent in at least part of the at least first region, the surface relief structure and the printed layer are each defined according to a common image and are aligned with one another, the surface relief structure presents a first set of features of the common image, and the printed layer presents a second set of features of the common image. The common image is presented by the surface relief structure and the printed layer in combination with one another, and the surface relief structure provides a tactile sensation for the common image.