2096 results about "Digital printing" patented technology

The invention discloses an intelligent digital printing management method based on data processing. The method comprises the steps of receiving personalized customization order information and converting the personalized customization order information into a data structure in a preset format; performing efficient processing and sorting on the converted order data by using a big data analysis technology; making an optimal printing production plan based on a preprocessing result; the printing production plan is executed, and the efficiency and quality of the whole process are monitored; and a production plan is adjusted according to data feedback collected in the production process to ensure the consistency of data processing and production. According to the invention, the problem of efficiently, stably and accurately processing large-scale personalized customization order data in an intelligent digital printing management process can be solved.

The invention relates to the technical field of digital printing machines, in particular to an intelligent ink droplet control method and system of a digital printing machine and the digital printing machine. The method comprises the steps of real-time data acquisition, multi-dimensional parameter modeling, real-time ink droplet behavior prediction, self-adaptive ink jet parameter adjustment, closed-loop feedback control, medium characteristic self-adaptive matching, intelligent multi-region optimization and environmental factor compensation. Ink droplet behaviors and environmental data are collected in real time through a high-speed camera and various sensors, a nonlinear model is constructed by using a deep learning technology, and a dynamic parameter optimization curve is generated. According to the method, the printing quality and efficiency are remarkably improved, and the method is suitable for various media and complex scenes.

The invention relates to the technical field of digital image processing and digital printing control, in particular to a digital printing color calibration method and system based on real-time image processing, and the method comprises the steps: constructing a fabric surface feature point coordinate set through a mixed feature tracking technology; calculating and predicting a target deformation field of the fabric at the printing position by applying a self-adaptive time domain prediction algorithm; and performing dynamic pixel interpolation on the original digital image by combining the target deformation field and the fabric texture feature map analyzed in real time to generate final printing image data. According to the invention, by combining high-robustness tracking, high-precision adaptive prediction and high-fidelity image generation technologies, the geometric precision and visual quality of printed products are significantly improved.

The invention provides a digital printing defect detection method based on a lightweight network, and the method comprises the steps: inputting a to-be-detected image into a trained detection model, enabling the trained detection model to execute a detection process, and obtaining a detection result whether a digital printing fabric has a defect or not. The detection process comprises the following steps: performing wavelet transform on a to-be-detected image to extract a high-frequency component and a low-frequency component, and extracting contour semantic mixed features by using the high-frequency component and the low-frequency component; enhancing the contour semantic mixed features to obtain enhanced contour semantic mixed features; and performing classification detection according to the enhanced contour semantic mixed features. A wavelet convolution module, a parallel module containing an attention mechanism and an improved multi-scale bottleneck module are designed for the trained detection model, so that the detection effect is improved, more efficient and accurate defect detection under the same hardware condition is realized, and the detection efficiency is improved. The problems of low detection precision, low speed, difficulty in generalization and the like in digital printing fabric defect detection in the prior art are solved.

The invention relates to the technical field of decorative materials, in particular to a decorative material with a 3D texture structure and a preparation method and application of the decorative material. The method comprises the following steps: carrying out digital printing on a pretreated substrate to obtain a 2D pattern layer on the surface of the substrate; coating the surface of the 2D pattern layer with a photocuring coating, carrying out preliminary curing, and then carrying out ink-jet printing of a texture developing solution on the surface subjected to preliminary curing to carry out secondary curing, so as to obtain a cured coating; the cured coating comprises a hardened part and an unhardened part; and after an unhardened part in the cured coating is removed through polishing and wire drawing, a surface coating is coated, and the decorative material with the 3D texture structure is obtained. The textures with different widths and depths can be obtained in a manner of combining primary curing of the coating with ultraviolet absorption of the developing solution, and then a microcosmic coarse and visual smooth form is obtained through polishing and wire drawing treatment, so that the obtained 3D texture structure is closer to natural textures.

The utility model provides a rapid steamer which comprises a rapid steamer body and fabric tension adjusting mechanisms arranged at the two ends of the rapid steamer body, and each fabric tension adjusting mechanism is composed of two first fabric tension adjusting mechanisms or composed of a first fabric tension adjusting mechanism and a second fabric tension adjusting mechanism. A steaming cavity and an adjusting cavity are formed in the steaming machine body, the adjusting cavity is located at the bottom of the steaming cavity and communicated with the steaming cavity, the adjusting cavity and the steaming cavity are arranged in a T shape, a plurality of cloth hanging rollers are arranged in the steaming cavity, a plurality of fixing rollers are arranged in the adjusting cavity, and chain wheels are arranged at the ends of the cloth hanging rollers and the ends of the fixing rollers. The chain wheels are connected through a chain, and a tensioning mechanism is arranged in the adjusting cavity. According to the utility model, through the arrangement of the fabric tension adjusting mechanism, the digital printing machine, the steamer and the post-processor can be integrally designed, so that the carrying time, the blanking time and the blanking time are saved, and the production efficiency is improved.

The invention relates to a method for printing paper (10) by means of a digital printing device having a plurality of paint application tools (6) for applying printing inks of different colors onto the paper (10), in which method the paper (10) to be printed passes through the paint application tools (6) in a feed direction, wherein the digital printing apparatus has a device (4, 18) configured and adapted to prevent or reduce the formation of condensation on the paint application tool (6), and by means of the device (4, 18), the formation of condensation on the paint application tool (6) is prevented or reduced, and wherein the device (4, 18) has a temperature controller and an electrical controller, wherein the temperature controller is arranged to influence the temperature of the paint application tool (6) and the electrical controller is arranged to control the temperature controller such that the paint application tool (6) has different temperatures wherein the temperature of the paint application tool (6) increases in a feed direction (16), the temperatures of two adjacent coating application tools (6) differ from each other by at least 0.5 DEG C, at most 1.5 DEG C, and the temperature between the first coating application tool (6) in the feed direction (16) and the last coating application tool (6) in the feed direction (16) differs by at most 10 DEG C.

The invention relates to the technical field of artificial intelligence, in particular to a digital printer control system based on artificial intelligence and a control method thereof. The system comprises a data collection simulation unit used for collecting historical printing data, generating ink diffusion simulation data and actual ink diffusion images under different conditions, and establishing a defect database at the same time; the prediction model building unit is used for building a space-time prediction model of ink diffusion, training the space-time prediction model by using ink diffusion simulation data, and finally generating a total loss function; and the feedback optimization unit is used for monitoring the change trend of the total loss function in real time. According to the digital printing machine control system based on artificial intelligence and the control method thereof, the prediction precision and the control effect of printing quality can be improved, fine ink diffusion differences caused by paper adsorbability changes can be effectively captured, and therefore accurate prediction of various defects possibly occurring in the printing process is achieved; the printing efficiency and the product quality are improved.

The utility model relates to the technical field of printing machines, and discloses a digital printing machine dusting assembly which comprises a powder storage tank, a stirring brush and a driving mechanism, a powder spraying head assembly is arranged at the lower end of the powder storage tank, the stirring brush is arranged in the powder storage tank corresponding to the powder spraying head assembly, and the driving mechanism is used for driving the stirring brush to rotate; the powder storage tank is further connected with an air pipe connector, and the air pipe connector is used for being connected with an air source to drive powder to be sprayed out of the powder spraying head assembly. According to the powder scattering assembly of the digital printing machine, the stirring brush corresponding to the powder spraying head assembly is arranged in the powder storage tank, the driving mechanism drives the stirring brush to rotate, in the powder scattering process, the air pipe connector is connected with the air source to drive powder to be sprayed out of the powder spraying head assembly, powder scattering is achieved, and meanwhile the stirring brush sweeps the powder spraying head assembly. The situation that the powder spraying head assembly is blocked in the powder spraying process is avoided, and the product quality is guaranteed.

The invention belongs to the technical field of printing management and artificial intelligence, and particularly relates to an intelligent digital printing management system and method based on data processing, and the system comprises a data collection module which obtains the temperature, humidity and dust concentration data of a printing environment; the data processing module is in communication connection with the data acquisition module and is used for receiving the acquired data sent by the data acquisition module; executing data preprocessing, image enhancement and feature extraction based on the acquired data; the data analysis module is in communication connection with the data processing module and is used for receiving the processed data sent by the data processing module; based on the processed data, intelligent analysis and quality evaluation are executed; the control execution module is in communication connection with the data analysis module and is used for receiving the analysis result sent by the data analysis module; and on the basis of the analysis result, real-time control and parameter adjustment are carried out on the printing equipment, the efficiency and quality of the whole printing process are improved, and resource consumption and environmental influence are greatly reduced.

A multiple layered print structure and apparatus to apply a design or image to fabric or cloth is disclosed. The structure may include one or more print layers printed on a substrate and an adhesive layer deposited on the print layer(s). The one or more print layer(s) and adhesive or resin layer may be deposited on the substrate in a pre-set pattern to form the shape profile for the design or image. The print layer(s) include inks or dyes for printing the print features and / or background color(s) of the image or design. The ink may be combined with a binder material to form the print layer(s). In some embodiments, the process includes the step of printing the multiple layered print structure using a combination of digital printing processes simplify the process for printing a design or image on fabric or cloth.

The invention relates to the technical field of digital printing, and discloses a digital printing method, a printing stock is a transparent material and is printed on the reverse side of the printing stock, and the printing method comprises the following steps that gloss oil is printed on the printing stock in a jet printing mode, powder spraying is conducted, and curing is conducted at the same time; the ink spraying system sprays color ink to a printing stock for printing, and a corresponding mirror image color pattern is sprayed and printed; and white ink is jet-printed on the printing stock. According to the digital printing method, printing is carried out on the back face of the transparent printing stock, the pattern can be protected, it is guaranteed that the product always has a good visual effect, the effect that the front face is watched through back face printing and the effect that the front face and the back face are watched through back face printing can be achieved, the perception effect of the pattern is not affected, and the printing effect is good. And a better perception effect can be obtained.

The invention discloses a digital printing quality detection method based on image analysis, and relates to the technical field of digital printing quality intelligent detection, and the method comprises the steps: obtaining the surface texture features of a visible light channel and the base material permeation features of an infrared channel in an HDR image group, carrying out the cross-modal correlation through a space-time attention mechanism, and generating a three-dimensional feature cube; the method comprises the following steps: acquiring material physical characteristics of a printed matter by adopting a reverse Monte Carlo ray tracing algorithm, generating an enhanced feature tensor through splicing of a three-dimensional convolutional network, and performing defect detection and positioning through cross-scale feature aggregation; and an improved DBSCAN clustering algorithm is adopted to carry out spatial aggregation on the defect coordinates to generate a complete defect area, and a defect detection report is output through dynamic threshold classification. According to the method, the three-dimensional feature cube containing the surface texture and the base material permeation features is constructed, accurate inversion of material characteristics such as the ink thickness and the roughness is achieved, and the precision and reliability of digital printing quality detection are improved.

The invention belongs to the technical field of digital printing machines, in particular to an anti-deviation device for a guide belt of a digital printing machine, and provides the following scheme that the anti-deviation device comprises a mounting frame, a guide roller is rotationally arranged on the mounting frame, the guide belt is rotationally arranged on the guide roller, a first electric guide rail is mounted on the mounting frame, and the first electric guide rail extends in the moving direction of the guide belt; a movable frame is connected to the first electric guide rail and extends in the direction perpendicular to the first electric guide rail, two suction cup boxes capable of horizontally moving are arranged on the movable frame, the tops of the suction cup boxes are in sliding contact with the bottom of the guide belt, and sensing units are arranged at the two ends of the movable frame. The suction cup box drives the guide belt to move in the direction away from the sensing unit sending the signals, suction of the suction cup box is cut off until the sensing unit stops sending the signals, deviation correction is achieved through movement of the suction cup box at the bottom of the guide belt, and the situation that the printing operation effect is affected due to wrinkles of the guide belt is effectively avoided.

A multiple layered print structure and apparatus to apply a design or image to fabric or cloth is disclosed. The structure may include one or more print layers printed on a substrate and an adhesive layer deposited on the print layer(s). The one or more print layer(s) and adhesive or resin layer may be deposited on the substrate in a pre-set pattern to form the shape profile for the design or image. The print layer(s) include inks or dyes for printing the print features and / or background color(s) of the image or design. The ink may be combined with a binder material to form the print layer(s). In some embodiments, the process includes the step of printing the multiple layered print structure using a combination of digital printing processes simplify the process for printing a design or image on fabric or cloth.

The invention relates to the technical field of biaxially oriented films, in particular to a low-noise tackifying non-adhesive film for digital printing and a preparation method thereof.The low-noise tackifying non-adhesive film for digital printing comprises a release functional layer, a core layer and a tackifying hot melt adhesive layer which are sequentially arranged, the release functional layer comprises 0.5-2.5 wt% of amino siloxane grafted polypropylene and homo-polypropylene, and the surface energy of the release functional layer is 24-26 dyn / cm; the core layer comprises homo-polypropylene; the tackifying hot melt adhesive layer is prepared from an ethylene-vinyl acetate copolymer A, 5 to 10 weight percent of ethylene-vinyl acetate copolymer B and 0.2 to 0.5 weight percent of polysiloxane elastomer. The low-noise tackifying glue-free film for digital printing belongs to a biaxially oriented polypropylene film, does not need secondary coating processing, is energy-saving and environment-friendly, is smooth to wind and unwind in the production and application processes, is low in unwinding noise, effectively ensures the compounding fastness between the film and a printed piece, and is high in practicability. The method is especially suitable for film coating of digital printing pieces with high silicone oil and wax content.

A multiple layered print structure and apparatus to apply a design or image to fabric or cloth is disclosed. The structure may include one or more print layers printed on a substrate and an adhesive layer deposited on the print layer(s). The one or more print layer(s) and adhesive or resin layer may be deposited on the substrate in a pre-set pattern to form the shape profile for the design or image. The print layer(s) include inks or dyes for printing the print features and / or background color(s) of the image or design. The ink may be combined with a binder material to form the print layer(s). In some embodiments, the process includes the step of printing the multiple layered print structure using a combination of digital printing processes simplify the process for printing a design or image on fabric or cloth.

The invention discloses a digital printing image color detection method, and belongs to the field of image data processing and the technical field of image detection. The invention provides a printed image color detection method of an improved superpixel segmentation algorithm based on saliency and color information entropy, and the method comprises the steps: delimiting an important region of a printed image through employing an image saliency algorithm, and adaptively determining the size of a superpixel of the region according to the color information entropy of the printed image in a saliency region. Performing different superpixel division on the salient region and the non-salient region of the printed image; in the printed image color detection, the color mean values of the printed image under the same superpixel label are compared, and the label with chromatic aberration is output, so that a chromatic aberration area is marked in the image, and the color offset of the chromatic aberration area is displayed. The method is used for printing image color detection of superpixel color mean value comparison, and a more accurate color detection result conforming to human vision can be obtained; the method has a fast detection speed, and can output a color difference area position and a color offset.

The invention is suitable for the technical field of printing machine equipment, and provides a paper conveying device of a digital printing machine. Comprising an adsorption conveying part, a lifting part, a horizontal conveying part and a storage moving trolley. The adsorption conveying component is fixedly installed on the lifting component, the lifting component is used for driving the storage and loading moving trolley to be lifted, the storage and loading moving trolley is used for storing and loading paper to be conveyed, and the adsorption conveying component is used for adsorbing and conveying the paper on the storage and loading moving trolley to the horizontal conveying component. The horizontal conveying part is used for horizontally conveying paper to digital printing. The ascending shaking mechanism is arranged on the air cylinder assembly close to the air nozzle, so that paper can be driven to shake in the adsorption ascending process, meanwhile, under the cooperation of the air nozzle, paper adhesion is avoided, it is guaranteed that only one piece of paper is conveyed each time, and conveying is more accurate.

The invention discloses a degraded image adversarial learning-based simulation embroidery design image reality evaluation method, and belongs to the technical field of digital printing. The method comprises the following steps: constructing an imitation embroidery design image adversarial learning evaluation model, wherein the model comprises a multi-scale degradation algorithm module, an embroidery design image generation sub-model and an embroidery design image evaluation sub-model; through image degradation, image reconstruction and region-by-region evaluation processes, design reality evaluation of different regions of the embroidery-imitating design image is realized in combination with an adversarial technology.

The invention relates to the technical field of intelligent printing production management, and discloses an intelligent digital printing management method based on data processing. According to the method, before a printing task enters actual production, a virtual task sandbox is created for pre-scheduling deduction; in the sandbox, an order is disassembled into atomic processes through a task decomposition model, and a virtual execution agent binding real-time states of equipment and materials is created for each process. A cross-process constraint network is constructed based on proxy simulation to quantify dependency, competition and space-time conflicts between processes. And operating the constraint to meet the solving process, performing dynamic relaxation and adjustment on the network constraint, and outputting a feasible pre-scheduling scheme. And finally, synchronizing the scheme to a real production queue to start production, and collecting actual data to continuously correct the model and the network. According to the method, the risk-free simulation optimization before production and the dynamic quantitative coordination of the production process are realized, and the scheduling precision, the resource utilization rate and the production delivery reliability are improved.

The invention discloses an automatic planning digital printing control system, which belongs to the technical field of printing control systems and comprises an order uploading, analyzing and planning system and a plurality of digital code identifying and printing units. Each digital code identifying and printing unit has a unique identification code, and the order uploading, analyzing and planning system manages the digital code identifying and printing units based on the unique identification codes; the unique identification code is bound with the size of a textile product with a printed pattern; the order uploading, analyzing and planning system comprises an order uploading module, a server, an order analyzing module, a customer code generating module and an order planning module. Through the above mode, the method achieves the automatic planning and distribution of the textile products to the corresponding digital ink-jet printing machines through the recognition of the sizes of the textile products in the orders, thereby improving the printing efficiency.

The utility model relates to the technical field of digital printing machines, and discloses a printing machine powder scattering mechanism which comprises a powder storage tank, an air pipe, a powder suction piece and a driving mechanism, a powder spraying head assembly is arranged at the lower end of the powder storage tank, a sleeve is connected to the powder outlet end of the powder spraying head assembly in a sleeved mode, and the driving mechanism is used for discharging shimmering powder in the powder storage tank through the powder spraying head assembly. One end of the air pipe penetrates through the outer wall of the sleeve to be arranged in the sleeve, the other end of the air pipe is used for being connected with an air source to drive the shimmering powder to be sprayed out of the sleeve, the powder suction piece is connected to the lower end of the powder storage tank in a sleeved mode and surrounds the powder spraying head assembly and the sleeve, a powder suction hole is formed in the bottom of the powder suction piece, and a powder discharging opening communicated with the powder suction hole is formed in the side wall of the powder suction piece. The powder discharging port is used for being connected with an air suction device, so that redundant dust is sucked in through the powder suction hole and discharged through the powder discharging port. According to the utility model, the situation that the powder spraying head assembly is blocked in the powder scattering process can be avoided, meanwhile, redundant dust is prevented from blocking the spraying head of the jet printing assembly, and the product quality is ensured.

The invention provides a lithium battery surface insulation coating digital printing production method, which comprises the steps of UV digital coating, mapping relation establishment, finished product detection, good product grading blanking and defective product repair treatment, and is characterized in that a printing station for executing each surface of a battery and a plurality of nozzles for executing current surface printing are grouped and numbered; and forming a mapping relation table among the printing station, the nozzle and each surface of the battery. When a finished product is detected, the defect type and the bad position information of the insulating coating are obtained, the mapping relation table is inquired according to the defect type and the bad position information, the information of the printing station and the spray head generating the defects is obtained, and then the process parameters of the corresponding printing station and the spray head are adjusted according to the defect type, so that the product defects are found in time; and the function of automatically responding to the defect is realized, so that the production waste is avoided.

A method for producing engineered stone slabs includes depositing fragments onto a surface and using a height limiting device to disrupt the fragments so a height of the fragments at the highest point from the supporting structure is substantially the same height as the height limiting device from the supporting structure. The method then includes using a digital printing device, in a first digital printing step, to print an image onto at least part of a top and side walls of at least some of the fragments, and then depositing additional composite material onto at least some of the fragments. The method further includes using a digital printing device, in an additional digital printing step, to print an image onto at least part of the additional damp composite material, and then using a press roller to press, flatten and stretch the fragments into a slab.

The invention belongs to the technical field of digital printing machines, and particularly discloses and provides an automatic pattern overprinting method for textile fabrics, which performs real-time acquisition through a high-definition industrial scanning camera, performs multiple operations such as image preprocessing, feature recognition and position adjustment, effectively solves the problem of insufficient printing precision at present, and improves the printing accuracy of the textile fabrics. According to the method, it can be guaranteed that no matter how the specification and size of equipment change, how the size of a to-be-printed textile fabric change and how the printing parameter mode change, images can be collected in a self-adaptive mode, the quality of a final product is guaranteed, and by calling RI software and board card printing software, deformed image data are called to the RI software to be subjected to image RI processing, so that the quality of the finished product is guaranteed. PRT printing data is produced and then sent to board card printing software through a network port for real-time printing. High integration is completely achieved, synchronous parallel operation of the stations of the multifunctional virtual assembly line is achieved, and the printing precision and efficiency are improved.

The invention discloses a printing dot compensation method, device and equipment and a storage medium, and the printing dot compensation method comprises the following steps: obtaining a first material parameter and an equipment parameter of a to-be-printed sheet; obtaining a digital printed sheet of the recent printed sheet from a database according to the first material parameter and the equipment parameter; performing cell division on the digital printed sheet, and calculating dot deformation rates of all cells; taking the second material parameter, the equipment parameter, the reference network point parameter, the actual network point parameter and the network point deformation rate as independent variables, taking network point compensation values for recovering the network points in all the cells to standard network points as dependent variables, and performing training by utilizing a PDC model to generate a plurality of network point compensation values matched with all the cells; and compensating the standard lattice points of all the cells according to the lattice point compensation values. According to the printing dot compensation method, dot compensation is carried out with the cells as units, and the defect that in the prior art, dot compensation cannot be carried out on a certain local area is overcome.

The invention relates to the technical field of digital printing machines, and discloses a double-cross-beam digital printing machine, a printing trolley is slidably connected with a first cross beam and a second cross beam through mover plates on the two sides of the printing trolley, the double cross beams can provide huge lifting force, and meanwhile first sliding rails are arranged on the tops and the side faces of the cross beams; the first sliding rails are additionally arranged on the top and the side faces, so that the stress of the sliding rails is increased, and the running stability of the printing trolley can be improved under the huge weight of the printing trolley; the first sliding rail located at the top of the cross beam can increase bearing capacity, and the first sliding rail located on the side face can improve operation precision. The printing trolley is driven through the linear motor and the mover plates at the same time, the linear motor is located above the cross beam, the structure is simple, the installation precision can be easily guaranteed, thrust can be easily increased, movers of the mover plates are powered on, the magnetic induction effect is generated, thrust is also given to the printing trolley, meanwhile, the mover plates on the two sides are controlled in parallel, and therefore the printing trolley is more stable. Synchronous driving of the two mover plates can be guaranteed, driving force is kept synchronous, meanwhile, accurate control is achieved, and printing stability and precision are effectively guaranteed.

The invention relates to the technical field of image data processing, in particular to a digital printing quality visual detection method and system for high-weather-resistance printed cloth, and the method comprises the steps: obtaining a surface image and a template image of the high-weather-resistance printed cloth, processing the surface image through an image algorithm, obtaining the color features of different channels, and carrying out the visual detection of the digital printing quality of the high-weather-resistance printed cloth. According to the color features of different channels, the surface image and the template image, determining the total difference value of each pixel value of pixel points at the same position of the surface image and the template image, and according to a preset local window and the total difference value of the pixel values, determining the possibility that each pixel point has color bleeding in a color layer in the preset local window, according to the method, the defect that the surface image is distorted and cannot highlight due to the influence of conditions such as light can be avoided, the potential bleeding area is determined according to the possibility so as to judge the digital printing quality of the high-weather-resistance printed cloth, and the accuracy of the potential bleeding area and the accuracy of quality detection are improved.

The invention relates to a remote monitoring and fault prediction system and method for intelligent digital printing equipment. The method comprises the following steps: acquiring anti-counterfeiting code printing operation data of a spraying device and drying equipment in intelligent digital printing equipment to obtain a comprehensive operation data set; constructing an equipment component relation graph structure; carrying out spraying uniformity and drying efficiency feature extraction, and creating a fusion spatio-temporal feature vector; performing multi-task prediction through a heterogeneous multi-task learning graph neural network to obtain the residual ink amount of the anti-counterfeiting code and the optimal drying parameter; optimization is carried out based on constraint conditions, and a printing process intelligent diagnosis model is obtained; and analyzing a real-time data set acquired in the anti-counterfeiting code printing process through the printing process intelligent diagnosis model, and generating early warning information of spraying quality and drying efficiency. According to the implementation of the invention, multi-source data can be comprehensively utilized, and a new method of intelligent remote monitoring and fault prediction is realized, so that the operation reliability and the production efficiency of digital printing equipment are improved.