4801 results about "Paper sheet" patented technology

The invention relates to the technical field of packaging, in particular to an intelligent metering method for remnant base paper rolls of a corrugated paper board assembly line. The intelligent metering method for the remnant base paper rolls of the corrugated paper board assembly line comprises steps as follows: a plurality of base paper feeding positions are arranged in the conveying direction of the assembly line at intervals, a base paper feeding frame is arranged in each base paper feeding position, and two base paper feeding rolls located on two sides of each base paper feeding frame are arranged on the base paper feeding frame; each base paper feeding roll is provided with lap recording sensors and incremental encoders, the lap recording sensors are used for monitoring the number of paper feeding laps of base paper clamped on the corresponding base paper feeding roll, the incremental encoders are used for monitoring the length of each lap after the base paper on the base paper feeding roll passes by one lap, and the lap recording sensors and the incremental encoders are connected with a controller. Intelligent metering can be realized, the operation cost of an enterprise is reduced, labor is saved, and the utilization rate of enterprise resources is increased.

Embodiments of the invention provide an active pen-stylus that emulates a paper feeling for users of the active pen-stylus. The active pen-stylus comprises a writing shaft that receives physical forces arising from use of the pen-stylus by a user. The active pen-stylus also includes a force sensor that receives forces from the writing shaft, the force sensor configured to convert received forces into an electronic signal. A writing spring receives forces from the force sensor and reflects back to the user a reactionary force that emulates a paper feeling. The writing spring compresses and undergoes geometric deflection in creating the reactionary force that emulates the paper feeling. The geometric deflection produced by the writing spring arises from deformation of the writing spring by the received forces.

The invention discloses a biomass-based reinforcing agent for paper and application of the biomass-based reinforcing agent. The reinforcing agent comprises a biomass-based material, the biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. The reinforcing agent prepared by the invention has abundant nanostructures, is beneficial to physical crosslinking such as entanglement and bridging of fibers in paper pulp, and improves the wet strength of paper; the preparation of the reinforcing agent is a simple physical process, and a complex synthesis chemical process for synthesizing a polymer in a traditional organic reinforcing agent is avoided; the reinforcing agent is prepared by a dissolution regeneration method, so that the energy consumption is low, the solvent can be recycled and reused, no chemicals are consumed, and the reinforcing agent is environment-friendly; the reinforcing agent prepared by the invention can achieve a satisfactory wet strength effect at a lower content.

The invention discloses a cationic core-shell PHA nano-emulsion reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The problems that a traditional wet strength agent is poor in environmental protection property and difficult to recycle, and a conventional bio-based material needs high-temperature curing and is high in energy consumption are solved. According to the reinforcing agent, low-MFFT bio-based polyhydroxyalkanoate is used as a core, and a positive ion shell layer with strong positive charges is wrapped outside the core. The method has the core advantages that extra high-temperature curing is not needed, the film can be efficiently formed under the conventional 105 DEG C drying condition, and the energy consumption is remarkably reduced; meanwhile, high dry and wet strength and water resistance are achieved, the treated paper has excellent re-pulping recycling suitability, and the industrial pain point that traditional wet strength paper is difficult to recycle is solved.

The invention discloses a polyhydroxyalkanoate-containing multi-component water-based ink binder system, a water-based ink composition and a preparation method and application thereof, and belongs to the technical field of environment-friendly printing materials and water-based ink. According to the invention, a microscopic two-phase or core-shell structure taking the second film-forming resin as a continuous phase and polyhydroxyalkanoate as a dispersed and enriched phase is constructed. Compared with the prior art, a printing layer can be endowed with excellent anti-blocking property, smooth touch feeling and barrier property under an extremely thin dry film only by using an extremely small amount of bio-based components, and meanwhile, excellent adhesive force and abrasion resistance are ensured. In addition, the water-based ink composition also shows excellent household compost and industrial compost degradation performance. The system not only greatly reduces the cost, but also has excellent paper repulping and deinking characteristics, and provides a high-performance solution for environment-friendly printing.

The invention discloses environment-friendly high-barrier packaging paper and a preparation method thereof, and belongs to the technical field of paper product manufacturing. The method comprises the following steps: dispersing bleached sulfate softwood pulp in an aqueous solution of TEMPO and NaBr, adding a NaClO solution, adjusting the pH value, carrying out a reaction, washing the product obtained by the reaction, and carrying out high-pressure homogenization to obtain TEMPO oxidized nanocellulose (TOCNF); mixing the bleached sulfate softwood chemical pulp, hardwood pulp and viscose fibers, pulping, papermaking and the like to obtain original paper; then, TOCNF and waterborne epoxy modified acrylic emulsion are mixed, and a mixed coating is prepared; and finally, coating the surface of original paper with the coating according to a certain mass ratio, and carrying out hot-pressing curing to obtain the environment-friendly high-barrier packaging paper. The packaging paper is excellent in mechanical property, high in barrier property, good in surface uniformity and printing property, environment-friendly and degradable in raw materials, simple to prepare and low in cost.

A supporting program for a printer supports multiple sheet sizes. The supporting program, when executed by a controller of an information processing device, causes the information processing device to, in response to receiving a request from a universal printing program, obtain sheet size data representing a sheet size list including a first-type sheet size, and generate document size data including available document sizes including the first-type sheet size and a second-type sheet size. When the universal printing program receives a print instruction from an application program, the supporting program causes the information processing device to determine whether a document size of an image to be printed is included in the first-type sheet size; when the document size is not included in the first-type sheet size, scale the image to fit the first-type sheet size; and cause the printer to print the image to be printed or a scaled image.

The invention discloses base paper for aluminum spraying and a preparation method thereof, and relates to the technical field of base paper. The preparation method comprises the following steps: pulping softwood pulp, then adding deionized water to dilute the softwood pulp until the mass concentration is 0.8%-1%, then adding modified gel particles, modified bentonite and a PAE wet strength agent, adjusting the pH value to 6.5-7.5, stirring for 40-60 minutes, and then adding deionized water to dilute the softwood pulp until the mass concentration is 0.5%-0.7% to obtain mixed paper pulp; and then making the mixed paper pulp into paper sheets, squeezing, drying, coating the surface layer coating on the surface of base material paper, and drying with hot air to obtain the body paper for aluminum spraying. According to the invention, the modified gel particles and the modified bentonite are added, so that the mildew-proof and moisture-proof capabilities of the base paper for aluminum spraying are effectively improved; the introduction of the surface coating further improves the mildew-proof and moisture-proof capabilities. Therefore, the method has a wider application prospect.

The invention discloses a compostable and reslurrable mineral-based dual-scale barrier coating as well as preparation and application thereof, and belongs to the technical field of water-based and reslurrable barrier materials. In order to overcome the defects of high coating weight, large color difference or difficulty in recovery in the prior art, a compact barrier is constructed through double-scale collaborative design of interlayer intercalation of layered double hydroxides and interparticle metal micro-networks. The method has the prominent advantage that high-efficiency water-oxygen barrier better than that of a conventional scheme can be realized only by using an extremely low coating amount. Meanwhile, the coating strictly controls color difference to maintain high whiteness of the paper, has pH responsiveness, can be quickly unlapped and dispersed under an acidic condition, and is easy to re-pulp. The coating does not contain PFAS and PVDC, and unification of high barrier, high whiteness and recoverability is achieved.

The invention relates to the technical field of printing equipment, in particular to a printing ink drying device for anti-counterfeiting stained paper, which comprises a rack, a conveying mechanism is arranged above the rack, a drying box body is arranged above the conveying mechanism, and the drying box body is sequentially divided into a leveling preheating area, a main curing area and a forced cooling area along the conveying direction; the conveying mechanism comprises a high-temperature-resistant conveying mesh belt and a vacuum adsorption platform arranged below the mesh belt; an LED-UV cold light source assembly is arranged in the main curing area, infrared heating pipes transversely arranged in the leveling preheating area and a reflecting cover above the infrared heating pipes are matched with the LED-UV cold light source assembly with a water-cooling circulation flow channel in the main curing area and an external cooling-water machine, and printing ink is evenly heated through infrared radiation to be leveled firstly; curing is completed through low-temperature ultraviolet light, a light source is cooled synchronously in a circulating mode, the effects of ink flat curing and paper low-heat deformation are achieved synchronously, and high-speed continuous operation is effectively supported.

The invention discloses a paper product counting method based on machine vision, and relates to the technical field of image processing and industrial automation. The method is used for solving the problem of low technical accuracy of paper products in complex industrial environments. The method comprises the following steps of: quantitatively recording inherent interference characteristics of a counting area by constructing an interference baseline library capable of being dynamically updated; performing real-time anomaly detection and positioning, acquiring images through a multispectral camera, comparing baseline features, and generating a difference thermodynamic diagram to position a paper candidate area; performing multi-modal counting, adopting track coding counting logic for a dynamic transmission scene, and adopting thickness gradient counting logic for a static stacking scene; counting results are subjected to cross check, dynamic and static counting results are compared, and accuracy is ensured through confidence evaluation; and the accuracy and the reliability of a paper product technology are obviously improved.

The invention discloses a two-in-one switchable digital ink-jet printer, and relates to the technical field of ink-jet printers, the two-in-one switchable digital ink-jet printer comprises a flip cover, a base station is hinged to the front side of the flip cover, a paper supporting platform and a cloth supporting platform are arranged in an inner cavity of the base station, a plurality of grooves are formed in the top of the cloth supporting platform, filter cotton is arranged in the grooves, and the filter cotton is arranged in the base station. A residue collecting box is arranged on the left side of the turning cover, a switching device is arranged on the front side of the turning cover, and when the printer is used for printing cloth, the dual-purpose rotating rod, the cloth supporting platform and the corner roller are arranged in a linear mode, namely, the dual-purpose rotating rod, the cloth supporting platform and the corner roller are located on the same horizontal line, the cloth is tightened, and the cloth is prevented from wrinkling and loosening in the printing process; when the printer is used for printing paper, the dual-purpose rotating rod, the paper supporting platform and the corner roller are arranged in an arch bridge shape, namely, the dual-purpose rotating rod and the corner roller need to be slightly lower than the paper supporting platform, so that the paper is tightened and flatly sucked on the platform, and the phenomenon that the paper is in contact with an ink jet nozzle due to bumps, deviation and wrinkles in the printing process and the ink jet nozzle is blocked is avoided.

A sheet discharging device includes: a discharging roller, elastic pieces, and a discharge tray. The discharging roller includes: a shaft extending in a width direction, and a roller body configured to convey a sheet in a discharging direction. The elastic pieces protrude in the discharging direction and are arranged upward relative to the shaft and offset from the roller body in the width direction. Each elastic piece has a surface facing downward. The surface has a portion directly above the shaft. The portion is positioned downward relative to an upper end of the roller body while not contacting the sheet. The elastic pieces include: a first elastic piece including a bending portion bent toward the discharge tray, and second elastic pieces not including a bending portion bent toward the discharge tray. The first elastic piece and the second elastic pieces are alternately arranged in the width direction.

The invention discloses a moisture-proof corrugated paper generation method and system based on machine vision. Humidity distribution data are obtained through image acquisition equipment, uniformity deviation characteristics are extracted through an image processing algorithm and input into an intelligent analysis model, and if deviation exceeds a threshold value, a coating thickness adjusting signal is output to determine the spraying amount of a moisture-proof agent; then, on the basis of the spraying amount, a structural integrity image in the forming stage is collected, deformation parameters are extracted, a production parameter optimization instruction is generated through a feedback verification unit in combination with the effect mapping relation model, an execution mechanism is driven to adjust the pre-drying temperature and the forming pressure, and meanwhile finished product moisture resistance detection data are obtained; finally, a closed-loop regulation and control cycle is formed through detection data and deviation characteristics, model parameters are optimized, deviation changes are continuously monitored, the mapping model is dynamically adjusted to adapt to different paper types, intelligent real-time optimization is achieved, and the production efficiency and the moisture-proof performance stability are improved.

An image forming apparatus includes a controller which performs a continuation process in which a toner image is secondarily transferred to a back side of a sheet conveyed from a double side conveyance portion, when performing a double side print in a case in which a sheet of a feeding portion is not conveyed to a secondary transfer portion. The controller controls so that in a case of performing the continuation process, while an image formation area of the intermediary transfer belt passes through the secondary transfer portion, a predetermined voltage, which makes an outer roller be at a potential of a normal charge polarity side to an inner roller and makes an absolute value of the potential difference between the inner roller and the outer roller be less than a discharging threshold value, is applied to the secondary transfer portion.

The invention relates to a method for manufacturing SCK paper having a basis weight in the range of 50 to 100 g / m2, wherein an optimal combination of nonrecycled BCP, BCTMP and recycled pulp obtained from release liner supercalendered Kraft paper is used to adjust the properties of the fiber furnish. While the use of BCTMP enables a product having a higher bulk, the recycled pulp component, which has high compatibility with the paper manufacturing process, enables to balance the manufacturing process and reduce the dimensional changes and shrinkage of the formed SCK paper. The combined presence of the BCTMP and the recycled pulp component in the fiber furnish improves the water removal from the fibers during the SCK paper manufacturing, while the presence of non-recycled BCP produced from softwood improves the formation and runnability of the paper web on the paper machine. This enables to produce SCK paper with improved sustainability, wherein the density may be controlled by means of the fiber furnish, without downgauging and without adverse effects to other paper properties, which would prevent the use of the SCK paper as substrate layer in a release liner.

A sheet conveying device includes a sheet supply portion, a detection portion, an acquisition processing portion, and a determination processing portion. The sheet supply portion supplies an uppermost sheet in a stack of sheets lifted by a lift portion to a conveying path. The detection portion detects the sheet supplied by the sheet supply portion on the conveying path. The acquisition processing portion acquires, when the stack of sheets is lifted by the lift portion, speed information related to a conveying speed of the sheet by the sheet supply portion using the detection portion. The determination processing portion determines whether or not the stack of sheets is in a setting failure state based on the speed information acquired by the acquisition processing portion.

The utility model discloses a paper shearing machine for paper product printing, which belongs to the technical field of paper product cutting and comprises a mounting bottom plate, supporting legs, a connecting vertical plate, a top frame, a mounting cross beam and a cutting component. A downward pressing air cylinder extends and retracts to enable a moving plate to move up and down so that a double-edge pointed-end tool can penetrate through paper, the moving plate can be prevented from rotating through a sliding limiting rod, a driving motor rotates to drive an adjusting screw to rotate, and therefore a sliding block can transversely move in a sliding groove; according to the paper cutting device, the double-edge pointed-end cutter can transversely move to cut paper, so that no notch is formed in the cutting position, the pressing plate can press the paper before cutting, and the double-edge pointed-end cutter can fix the paper before being inserted into the paper through the elastic force of the sliding rod; and cutting position deviation caused by the fact that the paper is not fixed when the double-edge pointed-end cutter penetrates through the paper is avoided.

This invention discloses a positioning method, chip, and robot for a mobile printing robot, comprising: the mobile printing robot starting to work on paper, acquiring an image of the current walking surface through a camera, and then determining a first boundary of the paper based on the acquired image of the current walking surface; the mobile printing robot determining a second boundary of the paper based on the first boundary, and then determining an initial printing position based on the first and second boundaries of the paper. The mobile printing robot can independently acquire the paper boundaries for positioning, without the need for additional positioning tools, making it convenient to use and reducing the overall cost of the machine.

The application belongs to the technical field of material surface structure detection, and provides a paper defect detection method and system, height information of each pixel point on the surface of the paper is acquired through an optical distance measuring sensor, and then a height distribution map is constructed, and the fluctuation mode of the surface structure contour of the paper is analyzed by combining convolution difference, local trend and change intensity, through curve fitting and trend clustering of the structure characteristics, typical surface structure types such as periodic corrugation and non-periodic wrinkle can be effectively distinguished, so that automatic identification of the microstructure of the paper surface and structure cause tracing analysis are realized, and meanwhile, accurate identification of the abnormal area is realized, and the universality and practicality of the system in the actual industrial scene are improved.

The invention relates to the technical field of image recognition, in particular to an intelligent comparison recognition method and system for printed images, and the method comprises the steps: building a spatial position mapping relation according to a multi-dimensional feature set, and comparing various types of feature differences of corresponding positions to obtain a feature difference chart; according to a printing process parameter library, analyzing a characteristic offset rule of each difference area in the characteristic difference chart, and judging whether the difference is caused by printing pressure or ink supply fluctuation; and according to a historical defect case library, matching a difference mode of the feature difference chart, and identifying whether an abnormal difference caused by printing plate abrasion or paper deformation exists or not. According to the invention, through a mechanism of dynamically adjusting the feature matching weight, the feature similarity of the key area can be recalculated according to the cause labeling information detected in real time, so that the optimized feature difference graph is generated, the precision of the detection result is improved, timely feedback can be realized in the production process, and quality problem accumulation is prevented.

The invention discloses a method for solving linting and dusting during paperboard printing, and belongs to the technical field of papermaking. Comprising the following detailed steps: a slurry preparation process, surface sizing treatment and a drying and curing process, in the slurry preparation process, various high-quality fiber raw materials are carefully selected and mixed, the proportion of various fibers is accurately controlled according to the expected performance and quality requirements of the paperboard, and meanwhile, a proper amount of auxiliaries are added; and the binding force between the fibers and the strength of the paper are enhanced. The raw material ratio in the paperboard production process is precisely regulated and controlled, the specially-made composite surface sizing agent is adopted for surface treatment, and scientific and reasonable drying and curing processes are matched, so that the problems of linting and powdering of the paperboard in the printing process are effectively solved, and the printing quality and the production efficiency of the paperboard are improved.

The invention discloses a thin and thick paper tension stabilizing traction device, which relates to the technical field of paper traction, and comprises a bearing frame, a paper feeding roller, a threaded paper spreading and passing roller, a tension roller and a tension sensor, a swing mechanism is arranged in the bearing frame and comprises an air cylinder displacement sensor, an ultra-low friction swing rod air cylinder, a swing roller, a swing roller force arm, a swing roller balance weight rod, a low-tension position hole and a high-tension position hole, the low-tension position hole and the high-tension position hole are formed in the side edge of the swing roller force arm, and the swing roller and the swing roller balance weight rod are installed on the side edge of the swing roller force arm. Paper flattening is achieved by means of thread structures of the thread paper unfolding and passing roller and the paper feeding roller, and initial tension of different pieces of paper is accurately detected in cooperation with a tension sensor. Through the combination of the swing roller balance weight lever, the ultralow friction swing rod cylinder and the low / high tension position hole, the tension can be flexibly adjusted to adapt to different characteristics of thick paper and thin paper, and the problem that the tension of the thick paper is insufficient or the thin paper is excessively stretched is solved.

The utility model relates to the technical field of correction, and discloses a student sitting posture corrector which comprises a learning board, a sleeve column is arranged on the learning board, a supporting column is arranged on the sleeve column, a chest support is fixedly connected to the top of the supporting column, and a liquid crystal handwriting board is arranged on the learning board. The supporting column is inserted into the sleeve column, strip grooves are symmetrically formed in the two side walls of the supporting column, a connecting rod penetrates through the sleeve column and penetrates through the two strip grooves, a button is fixedly connected to one end of the connecting rod, a spring groove is formed in the outer side of the sleeve column, the button is located in the spring groove, the inner side face of the button abuts against a spring, and the other end of the connecting rod is in threaded connection with a limiting disc. The liquid crystal handwriting board is environment-friendly and economical, the liquid crystal handwriting board can be repeatedly used, contents can be clearly seen through one key, paper is not needed, waste of the paper is greatly reduced, and the liquid crystal handwriting board is simple in structure and convenient to disassemble and assemble.

The invention discloses nano cellulose with high lignin content, a preparation method thereof and application of a barrier coating. The preparation method comprises the following steps: mixing a lignocellulose raw material with dilute sulphuric acid for acid pretreatment, and selectively depolymerizing hemicellulose to obtain lignin-rich residues of which the relative content of lignin is higher than that of the raw material; and carrying out mechanical nano fibrillation treatment to obtain the high-lignin-content nano cellulose with the lignin content of 29-60%. The prepared nano cellulose with high lignin content has excellent thermal stability, hydrophobicity and organic compatibility. The surface of paper is coated with the coating material, after hot pressing treatment, the Cobb value of the coated paper is as low as 3.3 g / m < 2 >, the water vapor permeability is only 12.1 g / (m < 2 >. D), grease permeation can be completely blocked, and the coating material has wide application prospects in the field of food packaging.

The invention relates to a digital and physical mixed signature method and device, electronic equipment and a storage medium, and relates to the technical field of information security, and the method comprises the following steps: calculating a document content hash value of an electronic document; obtaining random fiber distribution characteristics of a paper document bearing the electronic document, and generating a paper fingerprint hash value according to the random fiber distribution characteristics; performing data combination on the document content hash value and the paper fingerprint hash value, and performing digital signature processing on the combined hash value data by using a signature private key to generate a composite digital signature; and associating the composite digital signature with the electronic document, and outputting the electronic document for printing, so that the printed paper document is the unique physical entity bound with the composite digital signature. Through the application, an ideal balance can be obtained in three key dimensions of low cost, high safety and convenient verification, and an anti-counterfeiting means which can bind specific paper and can independently and conveniently verify is provided for a common printed piece.

The invention discloses a plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion and a preparation method thereof, the plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion comprises the following raw materials by mass: 3-12 parts of a nano dispersion, 13-42 parts of a hard monomer, 30-55 parts of a soft monomer, 3-10 parts of a silicon-containing monomer, 4-12 parts of a polyfunctional monomer, 0.1-3 parts of an initiator, and 2-13 parts of a reactive emulsifier; the modified acrylate emulsion is prepared from a nano dispersion, a hard monomer, a soft monomer, a silicon-containing monomer, a polyfunctional monomer, an initiator and a reactive emulsifier through soap-free emulsion polymerization. The plastic-free low-shrinkage waterproof oil-proof barrier emulsion is prepared through soap-free emulsion polymerization, the prepared emulsion is small in particle size, can form a dense film after being coated on the surface of paper, and has good barrier performance on water vapor, oil and the like; according to the plastic-free low-shrinkage waterproof oil-proof barrier emulsion, a polyfunctional structure, especially structures containing-COOH,-OH,-NH2,-NH-C (= O)-NH-and the like, is introduced into a molecular structure, so that the emulsion has good adhesion to paper-based fibers.

A paper sheet handling apparatus includes: a first facing section and a second facing section which are arranged so as to face each other in a facing direction with an insertion space interposed therebetween; and a conveyance section that conveys a paper sheet. The first facing section includes a first shutter that openably closes a first opening portion, and is disposed so as to be movable, in the facing direction, to an insertion position at a time when the paper sheet is inserted and a conveyance position at a time when the paper sheet is conveyed. The first facing section and the conveyance section include first shutter opening / closing units which open the first opening portion by meshing with each other to open the first shutter when the first facing section moves from the insertion position to the conveyance position.

To provide a paper feed device that can raise the pickup roller without requiring a sensor to detect the opening and closing of the bar, thereby reducing cumbersome operations. [Solution] To achieve the above objective, a paper feeding device according to one embodiment of the present invention comprises a pickup roller, a sensor, and a paper feeding control unit. The pickup roller pulls out sheets of paper one by one from a paper tray on which multiple sheets of paper are stacked. The sensor detects the presence or absence of paper. The paper feeding control unit controls the upward drive of the pickup roller based on the detection result of the sensor.

A sheet conveying device includes a sheet supply portion, a detection portion, and an acquisition processing portion. The sheet supply portion supplies an uppermost sheet in a stack of sheets lifted by a lift portion. The detection portion detects the sheet supplied by the sheet supply portion. The acquisition processing portion acquires a pay-out amount of the sheet from the stack of sheets based on an elapsed time from a start of supply of the sheet by the sheet supply portion to a time when the sheet is detected by the detection portion, that is measured at a timing at which the stack of sheets is lifted by the lift portion, and an elapsed time from the start of supply of the sheet by the sheet supply portion to the time when the sheet is detected by the detection portion, that is measured after the timing.