A page number printer and its printing system

Abstract

This invention discloses a page number printer and printing system, comprising a worktable, a printing unit, and a display control unit. A fixed base is provided on one side of the worktable, with one end of the fixed base adjustablely connected to the worktable along its length. A first positioning strip is provided on the end face of the worktable, adjustablely parallel to the end face of the worktable along its length. The printing unit is suspended above the end face of the worktable and connected to the other end of the fixed base. The display control unit is electrically connected to the printing unit. A sensor is provided at the bottom of the printing unit, located near the nozzle of the printing unit and close to the other side of the end face of the worktable. This technical solution enables adjustment of the printing position and customization of the page numbers; it also eliminates quality requirements for the paper document, ensuring its integrity.

Description

Technical Field

[0001] This invention relates to the field of page numbering technology for paper documents, and more particularly to a page number printer and its printing system. Background Technology

[0002] In modern society, although the use of electronic documents has become increasingly widespread, paper documents still hold an irreplaceable position, and many documents still need to be preserved in paper form. Student exam papers and court documents (materials that prove the facts of a case through recorded content and expressed ideas, such as written contracts, faxes, telegrams, agreements, charts, drawings, and invoices) are also typically paper documents. When merging and archiving paper documents, page numbers are often assigned and the documents are bound to ensure the integrity of the records.

[0003] See Figure 1 As shown, the traditional method for creating page numbers on paper documents is to use an automatic page numbering machine. This machine requires manual stamping of page numbers, pressing its bottom against the surface of the document. Uneven pressure can lead to incomplete page numbers, affecting continuous printing. Furthermore, manually adjusting the page number position is crucial; the subjectivity and inaccuracy of manual operation can cause page number misalignment or errors, impacting the overall quality and professionalism of the document. Manually adjusting page numbers also requires extra time and effort, especially for large batches of documents. Additionally, the content of the page number stamp on the bottom of the automatic page numbering machine is fixed, making customization impossible.

[0004] To address these issues, some people use existing printers to create page numbers. This typically involves creating a blank electronic document, filling in page numbers in preset locations, and then placing the paper document requiring page numbering into the printer's tray. The printer then prints the electronic document and adds the page numbers to the paper document. However, the printer's paper separation mechanism and feeding system have high requirements for the quality of the paper document, such as its thickness, weight, and surface roughness. This can easily lead to issues like missing pages or paper jams. Missing pages result in some paper documents being missing page numbers, affecting the integrity and accuracy of the merged archiving. Paper jams interrupt or delay page numbering, reducing efficiency, impacting work progress and productivity, and even damaging the paper document. Summary of the Invention

[0005] Therefore, a page number printer and printing system are needed to solve the above problems.

[0006] To achieve the above objectives, the present invention provides a page number printer, which includes a worktable, a printing unit, and a display control unit;

[0007] A fixing base is provided on one side of the worktable, and one end of the fixing base is adjustably connected to one side of the worktable along the length direction of one side of the worktable; a first positioning bar is provided on the end face of the worktable, and the first positioning bar is adjustably and parallelly provided on one side of the end face of the worktable along the length direction of one end of the worktable;

[0008] The printing unit is suspended above one side of the end face of the worktable and connected to the other end of the fixing base;

[0009] The display control unit is electrically connected with the printing unit;

[0010] A sensor is provided at the bottom of the printing unit, and the sensor is located near the nozzle of the printing unit and close to the other side of the end face of the worktable.

[0011] Further, the fixing base is in a "匚"-shape.

[0012] Further, a lifting structure is provided between the printing unit and the other end of the fixing base, and the lifting structure adjusts the suspension height of the printing unit.

[0013] Further, a guiding structure is provided between the printing unit and the cavity of the fixing base.

[0014] Further, a fixing bracket is provided in the middle of the worktable, the fixing bracket comprises support rods connected with two ends of the worktable and a cross beam connected with the two support rods, a mounting table is provided on the cross beam, and the display control unit is mounted in the mounting table.

[0015] A page number printing system applies the page number printer described above;

[0016] The display control unit is configured to display and set printing parameters, the printing parameters comprise: a starting page number, the number of page number digits, a page number increment, a page number format, a page number size, and setting an inkjet position, and a user sets the printing parameters through the display control unit;

[0017] The worktable is configured to place paper documents;

[0018] One end of the fixing base is adjustably connected to one side of the worktable along the length direction of one side of the worktable for adjusting the position of the printing unit; the first positioning bar is adjustably and parallelly provided on one side of the end face of the worktable along the length direction of one end of the worktable for adjusting the position of the paper document on the worktable, so that the printing unit prints the page number at the inkjet position according to the printing parameters;

[0019] The printing unit is triggered manually or automatically to print page numbers on the paper document according to the set printing parameters.

[0020] Furthermore, the automatic mode is triggered by the sensor detecting the paper document, and after waiting for a preset time, the printing unit prints the page numbers of the paper document according to the set printing parameters.

[0021] Furthermore, the printing parameters also include the document type, which includes single-sided printing and double-sided printing;

[0022] When the document type is single-sided printing, the printing unit prints the page number according to the inkjet printing position of the printing parameters;

[0023] When the document type is duplex printing, the front side of the document is printed first, and the printing unit prints the page number according to the inkjet printing position in the printing parameters; then the document is flipped to the back side, and the printing unit prints the page number according to the inkjet printing position in the printing parameters.

[0024] Furthermore, the printing parameters also include the number of times the same page number is printed, with the default number of times the same page number is printed being 1.

[0025] Furthermore, it also includes determining whether the starting page number includes a symbol. If so, when the number of digits in the page number is greater than the starting page number, zeros are added before the number after the symbol; when the page number increments, the number after the symbol is incremented.

[0026] Unlike existing technologies, the above-mentioned technical solution includes a worktable, a printing unit, and a display control unit. Printing parameters are set on the display control unit, and the paper document is placed on the end face of the worktable. One end of a fixing base is adjustablely connected to one side of the worktable along its length to adjust the position of the printing unit. The first positioning strip is adjustablely parallel to one side of the worktable along its length to adjust the position of the paper document on the worktable, thereby adjusting the printing position. This allows the printing unit to print page numbers according to the inkjet printing position of the printing parameters, enabling customized page numbering. By setting a sensor at the bottom of the printing unit near the end face of the worktable, precise sensing of the paper document can be achieved, ensuring printing accuracy and stability. Simultaneously, there are no quality requirements for the paper document, ensuring its integrity. The page number printer has advantages such as flexible adjustment, space optimization, integrated design, and precise sensing, improving printing efficiency and quality, and providing a better user experience. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the automatic number-skipping coding machine described in the background technology.

[0028] Figure 2 This is a three-dimensional structural diagram of a page number printer according to the present invention;

[0029] Figure 3 for Figure 2Enlarged view of point A in the middle;

[0030] Figure 4 This is a three-dimensional structural diagram of a page number printer according to the present invention;

[0031] Figure 5 This is a three-dimensional front view of a page number printer according to the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Workbench;

[0034] 101. Slide rail;

[0035] 102. First positioning bar;

[0036] 1021. Waist-shaped hole;

[0037] 103. Second positioning bar;

[0038] 104. Tighten the bolts;

[0039] 20. Printing unit;

[0040] 201. Nozzle;

[0041] 30. Lifting structure;

[0042] 301. Fixing block;

[0043] 302. Adjusting bolt;

[0044] 401. Guide rod;

[0045] 402. Guide plate;

[0046] 403. Tighten the bolts;

[0047] 501. Fixture;

[0048] 502. Cavity;

[0049] 503, Limit Block;

[0050] 60. Bracket;

[0051] 601. Support rod;

[0052] 602. Crossbeam;

[0053] 70. Mounting platform;

[0054] 80. Display control unit;

[0055] 90. Sensors. Detailed Implementation

[0056] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0057] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0058] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0059] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0060] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0061] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0062] Similar to the interpretation in the Patent Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also interpreted in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0063] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0064] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0065] join Figures 2-5 As shown, the present invention provides a page number printer, which includes a worktable 10, a printing unit 20 and a display control unit 80. The display control unit 80 includes a display screen and a control chip. The control chip is electrically connected to the display screen, sensor, motor and printing unit mentioned later. It can be directly installed on the printer or a mobile phone that connects to the printing unit wirelessly. Printing parameters are set on the display control unit 80, and then the paper document is placed on the end face of the worktable 10. One end of the fixing base 501 is adjustablely connected to one side of the worktable 10 along its length to adjust the position of the printing unit 20. The first positioning strip 102 is adjustablely parallel to one side of the end face of the worktable 10 along its length to adjust the position of the paper document on the worktable 10, thereby adjusting the printing position. This allows the printing unit 20 to print page numbers according to the inkjet printing position of the printing parameters, enabling customized page numbering. By setting a sensor 90 at the bottom of the printing unit 20 near the end face of the worktable 10, accurate sensing of the paper document can be achieved, ensuring printing accuracy and stability. At the same time, there are no quality requirements for the paper document, ensuring its integrity. The page number printer has the advantages of flexible adjustment, space optimization, integrated design, and accurate sensing, improving printing efficiency and quality, and providing a better user experience.

[0066] The following is a detailed description of a page number printer provided by the present invention. A page number printer includes a worktable 10, a printing unit 20, and a display control unit 80;

[0067] A fixed seat is provided on one side of the workbench 10, and one end of the fixed seat is adjustablely connected to one side of the workbench 10 along the length direction of one side of the workbench 10; a first positioning strip 102 is provided on the end face of the workbench 10, and the first positioning strip is adjustablely parallel to one side of the end face of the workbench 10 along the length direction of one end of the workbench 10.

[0068] The printing unit 20 is suspended above one side of the end face of the worktable 10 and connected to the other end of the fixed base;

[0069] The display control unit 80 is electrically connected to the printing unit 20;

[0070] The bottom of the printing unit 20 is equipped with a sensor 90, so the sensor 90 is located near the nozzle 201 of the printing unit 20 and close to the other side of the end face of the worktable 10.

[0071] The aforementioned workbench 10 includes a plane with a certain height, and the plane has sufficient width and length to accommodate paper documents. The aforementioned display control unit 80 is electrically connected to the printing unit 20 and is used to set page number printing parameters (such as page number type (e.g., 1-1, or A1, etc.), size, character type, etc.), and can also be used to display printing parameters, time, printing status (whether a job is being performed), etc. The display control unit 80 can be a display screen for setting page numbers controlled by buttons or knobs, or an LCD screen with touch functionality for setting page numbers. The aforementioned printing unit 20 can be any type, such as inkjet, laser, or thermal, preferably inkjet. The sensor 90 is used to sense the paper document; when the paper document is sensed, it automatically triggers the printing unit 20 to print page numbers after a set time.

[0072] One end of the fixing base 501 is adjustably connected to one side of the worktable 10. In some embodiments, a plurality of insertion ports are provided on one side of the worktable 10, and one end of the fixing base 501 is inserted into one side of the worktable 10. In some embodiments, one side of the worktable 10 is slidably connected to one end of the fixing base 501; specifically, the fixing base 501 is in a "匚"-shape, a slide rail 101 is provided on one side of the worktable 10 along the length direction of the one side of the worktable 10, and one end of the fixing base 501 is slidably connected in the slide rail 101. The sliding connection between one end of the fixing base 501 and the worktable 10 enables the printing unit 20 connected to the other end of the fixing base 501 to move along with the fixing base 501, that is, the printing unit 20 can move along the length direction of the end face side above the end face side of the worktable 10 to adjust the position of page number printing on paper documents; when the page number printer is not needed, the fixing base 50 and the printing unit 20 can be slid to one side, saving space and facilitating arrangement; which provides greater flexibility and adaptability for the page number printer. Of course, in practical applications, when one end of the fixing base 501 is slidably connected to the slide rail 101, a limit block 503 is further required to be disposed at one end of the fixing base 501 to prevent one end of the fixing base 501 from falling off from the slide rail 101. In a further improvement of this embodiment, a motor can be disposed on one side of the slide rail 101, and the sliding distance of the fixing base 501 is controlled by the motor. A user can easily adjust the position of the fixing base 501 only by pressing a button or adopting other control methods without manually pushing the fixing base 501, which improves the convenience and efficiency of operation; meanwhile, the mode of controlling the sliding distance of the fixing base 501 by the motor can provide higher accuracy and repeatability. By presetting the position of the fixing base 501, the motor can accurately move the fixing base 501 to the designated position, ensuring consistency and accuracy in each use. The user can flexibly adjust the position of the fixing base 501 according to different printing position requirements to adapt to different printing requirements, which provides greater flexibility and programmability, and can realize the functions of automatic positioning and position saving; in addition, the motor can also lock the fixing base 501 to ensure its stability, eliminating the need to readjust the position of the fixing base 501 each time when in use, which saves time and workload.

[0073] A lifting structure 30 can be provided between the printing unit 20 and the other end of the fixed base 501. The lifting structure 30 adjusts the suspension height of the printing unit 20. This lifting structure 30 can be a retractable support rod 601, a spiral lifting structure 30, or a pneumatic lifting device, etc. By adjusting the suspension height of the printing unit 20, the distance between the print head and the paper document can be ensured to be just right. This can adapt to different paper document thicknesses, printing speeds, or printing quality requirements. For example, for printing thicker paper documents, the printing unit 20 can be adjusted to a higher position to maintain an appropriate printing distance. This embodiment uses a spiral lifting structure 30 as an example to further illustrate the invention. The other end of the mounting base 501 extends towards the top and sides of the printing unit 20 to form a cavity 502 for mounting the printing unit 20. The lifting structure 30 includes a fixing block 301 and an adjusting bolt 302. The fixing block 301 is fixed to the top of the cavity 502 corresponding to the top of the printing unit 20. The fixing block 301 has a through hole, and the adjusting bolt 302 passes through the through hole and is threadedly connected to the top of the printing unit 20. The fixing block 301 and the adjusting bolt 302 ensure that the printing unit 20 can be stably mounted on the top of the cavity 502, avoiding printing deviations or quality problems caused by movement or loosening. The presence of the adjusting bolt 302 allows the suspension height of the printing unit 20 to be changed by rotating the adjusting bolt 302. This precise adjustment capability allows for fine-tuning of the position of the printing unit 20 as needed to ensure that the distance between it and the printing base plate is just right, thereby improving printing quality and accuracy.

[0074] A further improvement to the above embodiments is that the printing unit 20 and the top of the cavity 502 are provided with a guide structure. This guide structure facilitates precise height adjustment of the printing unit 20, preventing positional shifts in the printing unit 20 caused by height adjustments and ensuring accurate alignment and positioning between the printing unit 20 and the cavity 502. In some embodiments, the guide structure includes several guide rods 401 located on the top of the printing unit 20. The top of the cavity 502 has guide holes corresponding to the guide rods 401. When the bolt passes through the through holes and connects with the first thread, the guide rods 401 pass through the guide holes. The aforementioned guide rods 401 can be arranged in a straight line, circle, triangle, etc. The presence of the guide rods 401 allows the printing unit 20 to be accurately inserted into the guide hole during installation. When adjusting the height of the printing unit 20, the guide rods 401 move within the guide hole, achieving precise height adjustment of the printing unit 20 and avoiding printing quality problems caused by positional misalignment. This ensures precise alignment and positioning between the printing unit 20 and the top of the cavity 502. In some embodiments, the guiding structure includes an "L"-shaped guide plate 402, which is located on one or both sides of the cavity 502. The horizontal plate of the guide plate 402 is fixedly connected to one or both sides of the cavity 502, and the horizontal plate is fixed to the outer wall of the cavity 502. The vertical plate faces the printing unit 20, and the printing unit 20 is provided with a guide rail along the height direction corresponding to the vertical plate. The vertical plate is slidably connected to the guide rail. During installation, the vertical plate of the guide plate 402 is slidably connected to the guide rail. When adjusting the height of the printing unit 20, the guide rail slides on the vertical plate of the guide plate 402, achieving precise height adjustment of the printing unit 20 and avoiding printing quality problems caused by positional misalignment. This ensures precise alignment and positioning between the printing unit 20 and both sides of the cavity 502. In some embodiments, both of the above guiding structures are used simultaneously to guide the height adjustment of the printing unit 20, ensuring precise alignment and positioning between the printing unit 20 and the cavity 502. A tightening bolt 403 can also be added. The tightening bolt 403 is threadedly connected to the vertical plate, and by rotating the tightening bolt 403, it presses against one side of the printing unit 20. The vertical plate is threadedly connected to the top bolt 403, so that the top bolt 403 presses against one side of the printing unit 20, which provides additional support and stability to the printing unit 20, increases the stability between the top bolt 403 and the printing unit 20, ensures a tight connection between the printing unit 20 and the cavity 502, and prevents the printing unit 20 from shaking and vibrating during operation.

[0075] The display control unit 80 is used to set page number parameters and display the information of the currently printed page number. To facilitate observation of the display control unit 80, a bracket 60 can be provided in the middle of the workbench 10. The bracket 60 includes support rods 601 connected to both ends of the workbench 10 and a crossbeam 602 of the two support rods 601. A mounting platform 70 is provided on the crossbeam 602, and the display control unit 80 is installed in the mounting platform 70. By installing the display control unit 80 on the mounting platform 70 of the bracket 60, the display control unit 80 can be separated from other work areas, improving the operator's visibility and operability of the display control unit 80. Preferably, the display control unit 80 forms an acute angle with the workbench 10, facilitating user observation and settings.

[0076] The first positioning strip 102 is adjustablely and parallel to one side of the end face of the worktable 10 along the length direction of one end of the worktable 10. In some embodiments, through holes are provided at both ends of the first positioning strip, and screw holes are provided at both ends of the worktable along the length direction of one end of the worktable corresponding to the first positioning. The first positioning strip is adjustablely fixed to one side of the end face of the worktable by bolts. In some embodiments, the first positioning strip 102 is provided on the end face of the worktable 10, and the first positioning is parallel to one side of the end face of the worktable 10. The first positioning strip 102 is provided at both ends of the first positioning strip 102, and the length direction of the waist-shaped hole 1021 is perpendicular to one side of the end face of the worktable 10. The first positioning strip 102 is fixedly provided on the end face of the worktable 10 by fastening bolts 104. The first positioning strip 102 is configured to provide positioning and alignment functions along one edge of the paper document on the worktable 10, accurately positioning the printed page numbers. The oblong hole 1021 allows adjustment of the first positioning strip 102 on the worktable 10, enabling the paper document on the worktable 10 to adjust its position accordingly, thereby changing the printed page number position. Alternatively, a second positioning strip 103 can be provided on the worktable 10, perpendicular to the first positioning strip 102 and located at one or both ends of the worktable 10's end face. The second positioning strip 103 provides positioning and alignment functions along the other edge of the paper document on the worktable 10, accurately positioning the printed page numbers.

[0077] A page number printing system that uses the aforementioned page number printer.

[0078] The display control unit 80 is used to display and set printing parameters, including: starting page number, number of digits per page, page number increment, page number format, page number size, and setting the inkjet printing position. The user sets the printing parameters through the display control unit 80.

[0079] The workbench 10 is used to place paper documents;

[0080] One end of the fixed base is adjustablely connected to one side of the worktable 10 along the length direction of one side of the worktable 10 to adjust the position of the printing unit 20; the first positioning strip 102 is adjustablely parallel to one side of the end face of the worktable 10 along the length direction of one end of the worktable 10 to adjust the position of the paper document on the worktable 10, so that the printing unit 20 prints the page number according to the inkjet position of the printing parameters.

[0081] The printing unit 20 is triggered manually or automatically to print page numbers of the paper document according to the set printing parameters.

[0082] In the above printing parameters, the default starting page number is 1; the default page number digits are the starting page number digits, and when the set page number digits are greater than the starting page number, zeros are added before the number; the default page number increment is 1, and the page number increment is the increment value of the page number; the page number format includes characters, barcodes, QR codes, etc., and the default page number format is character; the printing position of the inkjet printer can be set to the left, middle, or right of the header or footer, etc., and the coordinates of the printed page number can also be set according to the initial position, with the default initial position coordinates being 0. By applying the above page number printer, this page number printing system has the advantages of convenient setting of printing parameters, accurate printing of page numbers, a multi-functional workbench 10, and flexible printing methods, which improves printing efficiency and quality and provides a better user experience.

[0083] The aforementioned automatic triggering method involves sensor 90 detecting the paper document, and after waiting for a preset time, printing unit 20 prints the page numbers of the paper document according to the set printing parameters. The preset time can be 1 second, 2 seconds, 3 seconds, etc. By automatically triggering the printing operation after sensor 90 detects the paper document and waits for the preset time, this automatic triggering printing method offers advantages such as automated printing, precise sensing and printing, time control, and automated operation, improving printing efficiency, accuracy, and stability, and simplifying the operation process.

[0084] The printing parameters also include the document type, which includes single-sided printing and double-sided printing.

[0085] When the document type is single-sided printing, after the user sets the printing parameters, the paper document is placed on the workbench 10. The printing unit 20 prints the page number in the corresponding position of the paper document according to the inkjet position of the printing parameters. After printing is completed, the user can take away the printed paper document.

[0086] When printing a duplex document, the user sets the printing parameters and places the paper document on the worktable 10. The printing unit 20 first prints the page numbers on the corresponding positions on the front of the paper document according to the inkjet printing parameters. Then, the user flips the paper document over, placing it back on the worktable 10 with the back side facing up. The printing unit 20 then prints the page numbers on the corresponding positions on the back of the paper document according to the inkjet printing parameters. After printing is complete, the user can remove the printed duplex document.

[0087] By setting the document type, users can choose single-sided or double-sided printing, printing according to actual needs, improving printing flexibility and adaptability. For single-sided printing, the printing unit 20 directly prints page numbers based on the inkjet printing position in the printing parameters, simplifying the printing process and improving printing efficiency. For double-sided printing, both the front and back sides can be printed in one go, reducing operation and waiting time, further improving printing efficiency.

[0088] The printing parameters also include the number of times the same page number is printed, with a default value of 1. After the user sets the printing parameters, the paper document is placed on the printer. The printing unit 20 prints the page number on the corresponding position of the paper document according to the inkjet printing position in the printing parameters. Then, the same printing operation is repeated according to the set number of times the same page number is printed. For example, when printing page number N-1, the number of times the same page number is printed is 3. The page numbers of the first, second, and third pages are N-1. After printing 3 times, it jumps to N-2, that is, the printing starts from the fourth page N-2.

[0089] The page number printing system also includes determining whether the starting page number includes a symbol. If so, when the page number has more digits than the starting page number, zeros are added before the numbers after the symbol. When the page number increments, the numbers after the symbol are incremented. The symbols include -, |, @, #, &, *, etc. Taking - as an example, the part before - can be a letter or number, and the part after - is a number, such as N-1. If the page number has more digits than the starting page number, such as the starting page number being N-1 and the page number having 5 digits, then the actual starting page number is N-001. When the page number increments, such as the starting page number being N-1 and the increment being 1, the next page number is N-2. This system can also be set to print single-page front and back, with the printing position symmetrical relative to the center of the paper after page turning. When the sensor detects the next page, the fixed seat 501, originally at the set starting position, is then moved by the control motor (such as a screw motor) to a position symmetrical to the center of the slide rail 101. Then printing begins. After printing, return to the set starting position and wait for the next print. This ensures that the page numbers on both sides of a single page are in the same position.

[0090] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of the present invention, or equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A page number printer, characterized in that, comprising a worktable, a printing unit and a display control unit; a fixing seat is provided on one side of the worktable, and one end of the fixing seat is adjustably connected to one side of the worktable along the length direction of one side of the worktable; the fixing seat is C-shaped, a slide rail is provided on one side of the worktable along the length direction of one side of the worktable, and one end of the fixing seat is slidably connected in the slide rail, so that the printing unit connected to the other end of the fixing seat moves along with the fixing seat; a first positioning strip is provided on the end face of the worktable, and the first positioning strip is adjustably arranged in parallel on one side of the end face of the worktable along the length direction of one end of the worktable; both ends of the first positioning strip are respectively provided with waist-shaped holes, the length direction of the waist-shaped holes is perpendicular to one side of the end face of the worktable, and the first positioning strip is fixedly arranged on the end face of the worktable through fastening bolts; the printing unit is suspended above one side of the end face of the worktable and connected to the other end of the fixing seat; a lifting structure is provided between the printing unit and the other end of the fixing seat, and the lifting structure adjusts the suspension height of the printing unit; the other end of the fixing seat extends toward the top and both sides of the printing unit to form a cavity for mounting the printing unit; the lifting structure comprises a fixing block and an adjusting bolt, the fixing block is fixed to the top of the cavity corresponding to the top of the printing unit, the fixing block is provided with a through hole, and the adjusting bolt passes through the through hole and is in threaded connection with the top of the printing unit; the display control unit is electrically connected with the printing unit; a fixing bracket is provided in the middle of the worktable, the fixing bracket comprises support rods connected to both ends of the worktable and a cross beam connected to the two support rods, a mounting platform is provided on the cross beam, and the display control unit is mounted in the mounting platform; a sensor is provided at the bottom of the printing unit, the sensor is located near a nozzle of the printing unit and close to the other side of the end face of the worktable, so that when the sensor senses a paper document, the printing unit is automatically triggered to print page numbers on the paper document after a set waiting time.

2. The page number printer according to claim 1, characterized in that, a guiding structure is provided between the printing unit and the cavity of the fixing seat.

3. A page number printing system, applying the page number printer according to any one of claims 1-2, characterized in that, the display control unit is configured to display and set printing parameters, the printing parameters comprise: starting page number, number of page number digits, page number increment, page number format, page number size, and spray printing position setting, and the page number format comprises characters, barcodes and two-dimensional codes; a user sets the printing parameters through the display control unit; the worktable is configured to place paper documents; one end of the fixing seat is adjustably connected to one side of the worktable along the length direction of one side of the worktable, so as to adjust the position of the printing unit; the first positioning strip is adjustably arranged in parallel on one side of the end face of the worktable along the length direction of one end of the worktable, so as to adjust the position of the paper document on the worktable, so that the printing unit prints page numbers according to the spray printing position in the printing parameters; the printing unit is triggered manually or automatically to print page numbers on paper documents according to the set printing parameters.

4. The page number printing system according to claim 3, characterized in that, the automatic trigger means that after the sensor senses a paper document and waits for a preset time, the printing unit prints page numbers on the paper document according to the set printing parameters.

5. The page number printing system according to claim 3, characterized in that, The printing parameters also include the document type, which includes single-sided printing and double-sided printing. When the document type is single-sided printing, the printing unit prints the page number according to the inkjet printing position of the printing parameters; When the document type is duplex printing, the front side of the document is printed first, and the printing unit prints the page number according to the inkjet printing position in the printing parameters; then the document is flipped to the back side, and the printing unit prints the page number according to the inkjet printing position in the printing parameters.

6. The page number printing system according to claim 3, characterized in that, The printing parameters also include the number of times the same page number is printed, with the default number of times the same page number is printed being 1.

7. The page number printing system according to claim 3, characterized in that, It also includes determining whether the starting page number includes a symbol. If so, when the number of digits in the page number is greater than the starting page number, zeros are added before the number after the symbol. When the page number increments, the number after the symbol is incremented.

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