An image forming apparatus and printing method

Abstract

The present invention discloses an image forming device, which can form an image on a printing medium, wherein the printing medium includes a required medium and a waste medium, and comprises: a scanning module, which is used to scan the printing medium to obtain scanning information; a printing module, wherein the path of the printing module is connected to the paper path of the scanning module, and the printing module has a waste paper box; after the scanning module scans the printing medium, the scanning information and the printing medium are input to the printing module, so that the printing module performs a printing operation on the required medium, or outputs the waste medium to the waste paper box. In the image forming device of the present application, the user only needs to place the printing medium stack on the scanning module, and the image forming device can automatically identify the required medium that can be used for the current printing and use it for printing, and discharge the unusable waste medium into the waste paper box, thereby realizing automatic identification of reusable printing media, and the user no longer needs to manually distinguish each printing medium.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic imaging, and in particular to an image forming device and a printing method. Background Art

[0002] In the current office environment, when users only need to print on one side, they sometimes choose to use recycled paper (recycled paper means paper that has been printed on one side or handwritten on one side, and the other side is blank) to save costs. Usually, users will accumulate recycled paper and put it into the printing paper box of the image forming device after accumulating a certain amount. Since recycled paper will be mixed with waste paper (paper that has been used on both sides) or new paper (both sides are blank) when accumulating, and single-sided blank paper will also have some blank sides facing up and some blank sides facing down due to placement problems, and directly putting it into the printing paper box will cause disordered printing. However, the current image forming equipment does not have the function of screening recycled paper, so it is often necessary to manually visually inspect the recycled paper one by one and then pick out the reusable paper one by one, and arrange the same blank side to print with the printing side facing up or down according to the printer's instructions. In this way, in order to effectively use paper for secondary printing, users must not only recycle the paper first, then analyze the blank pages, and then put them into the printing paper box, and the repeated operations are time-consuming and labor-intensive. Summary of the invention

[0003] The image forming device of the present invention can effectively solve the problem that the image forming device in the prior art cannot effectively screen the recycled paper.

[0004] According to one aspect of the present invention, there is provided an image forming device capable of forming an image on a printing medium, the printing medium including a demand medium and a waste medium, comprising:

[0005] A scanning module, used for scanning the printing medium to obtain scanning information;

[0006] A printing module, wherein a paper path of the printing module is connected to a paper path of the scanning module, and the printing module has a waste paper box;

[0007] After scanning the printing medium, the scanning module inputs the scanning information and the printing medium into the printing module, so that the printing module performs a printing operation on the required medium, or outputs the discarded medium to the waste paper box.

[0008] In some embodiments, the scanning module has a scanning sensor and a counter, the scanning sensor is used to scan the printing medium, the counter is electrically connected to the printing module, and the counter transmits the scanning information to the printing module so that the printing module distinguishes between the required medium and the discarded medium. Thus, the scanning sensor scans both sides of the paper and records it in the scanning module, and the counter triggers the printing module to perform the printing work.

[0009] In some embodiments, the scanning module has a scanning paper feed tray and a scanning paper discharge tray, and the printing medium is output from the scanning paper feed tray to the scanning paper discharge tray after passing through the scanning sensor, and then enters the printing module from the scanning paper discharge tray. Thus, the existing printer structure is improved so that the printer can select the required paper.

[0010] In some embodiments, the scanning paper feed tray is provided with a paper length sensor and a paper width sensor for identifying the paper type of the printing medium placed on the scanning paper feed tray, so that the scanning module controls the signal inputting the printing medium to the printing module. Thus, when the paper length sensor and the paper width sensor detect that there is no matching printing paper type on the scanning paper feed tray, paper is automatically taken from the original paper box.

[0011] In some embodiments, the printing module has multiple paper delivery trays, and when the scanning module detects different paper types of the printing media through the paper length sensor and the paper width sensor, the detection information is obtained and transmitted to the printing module so that the printing module outputs the printing media of different paper types to different paper delivery trays. In this way, paper of the same paper type is classified into a unified paper delivery tray after printing.

[0012] In some embodiments, the counter scans the waste media through the scanning sensor to output a classification signal to the printing module, the waste paper box includes a first waste paper box, a second waste paper box and a third waste paper box, the printing module outputs the waste media with one side discarded to the first waste paper box, the printing module outputs the waste media with double-sided blank to the second waste paper box, and the printing module outputs the waste media with double-sided discarded to the third waste paper box, so as to classify and stack the waste media. In this way, the waste media are output and classified to further classify the paper for reuse.

[0013] In some embodiments, the printing module has a push rod for pushing the printing medium, and the push rod pushes the waste media of different categories to the first waste paper box, the second waste paper box or the third waste paper box for classified stacking through the classification signal of the counter. Thus, the paper output is realized by the push rod.

[0014] In some embodiments, when the scanning module detects the scrapped medium with one side scrapped, the printing module controls the scrapped medium to move in the opposite direction so that the scrapped medium is turned over, and the printing module performs a printing operation on the turned scrapped medium. Thus, the paper with one side scrapped and the reverse side can be actively printed, which improves the breadth of paper screening.

[0015] In some embodiments, the printing module has a print paper discharge tray and a print pressure wheel, the print pressure wheel performs a print operation on the required medium and outputs the required medium to the print paper discharge tray, and the waste medium directly passes through the print pressure wheel and is output to the waste paper box. Thus, the paper is printed through the print pressure wheel and collected on the print paper discharge tray.

[0016] On the other hand, a printing method of an image forming device is provided, comprising the above-mentioned image forming device, performing the following steps:

[0017] S1, start the job to input the printing medium;

[0018] S2, the scanning module scans the printing medium to obtain scanning information and transmits the scanning information to the printing module, and then delivers the scanned printing medium to the printing module;

[0019] S3, the printing module receives the scanned printing medium and the scanning information, and executes the printing step or directly outputs to the waste paper box according to the printing medium corresponding to the scanning information;

[0020] S4. Printing is completed and the job ends.

[0021] In some embodiments, step S2 comprises:

[0022] S21, determining a matching result between the paper type of the printing medium and the paper type required to be printed by the printing module;

[0023] S22: If the paper type matching result is successful, the scanning module sequentially picks up paper from the scanning paper feed tray and obtains the scanning information P of the first page of printing medium to the nth page of printing medium. n -P 1 ;

[0024] S23, the scanning module discharges the scanned print medium onto the scanning paper discharge tray, and transmits the scan information to the printing module;

[0025] In some embodiments, if the paper type matching result fails in step S21, information on whether to switch the printing medium source is output. According to the switching result, the printing module obtains the printing medium from other sources and executes the printing step, or the image forming device executes the interception operation.

[0026] In some embodiments, step S3 includes:

[0027] S31, the printing module sequentially inputs printing media from the nth page to the first page from the scanning paper discharge tray, and respectively obtains scanning information P1-Pn of the nth page of printing media to the first page of printing media from the scanning information;

[0028] S32, the printing module determines whether the current printing medium is the required medium;

[0029] S33, the printing module performs a printing step on the required medium and discharges it to the print paper discharge tray; the printing module does not perform a printing step on the scrapped medium and discharges it to the waste paper tray.

[0030] Compared with the prior art, the image forming device of the present invention has the following beneficial effects:

[0031] The present application can scan the printing medium through the scanning module to identify the type that can be printed, and then print and classify the printing medium through the printing module. The printing module can directly print the required media input from the scanning module, or directly output the scrapped media to the waste paper box, so as to separate the scrapped media and use the required media directly. Therefore, the user only needs to place the printing medium pile on the scanning module, and the image forming device can automatically identify the required media that can be used for the current printing and use it for printing, and discharge the unusable scrapped media into the waste paper box, thereby realizing automatic identification of reusable printing media, and the user no longer needs to manually distinguish each printing medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the image forming device of the present invention;

[0033] Figure 2 A diagram showing the working principle of the image forming device of the present invention when screening paper;

[0034] Figure 3 A reference diagram of an image forming apparatus according to the present invention having a plurality of waste paper boxes;

[0035] Figure 4 A reference diagram for an embodiment of turning over paper in an image forming apparatus of the present invention;

[0036] Figure 5 A flow chart of a printing method of an image forming device of the present invention;

[0037] Figure 6 A diagram showing the specific working steps of the printing method of the image forming device of the present invention.

[0038] In the figure: 1-scanning module, 11-paper feed roller, 12-scanning feed roller, 13-discharge roller, 14-scanning paper feed tray, 15-scanning paper discharge tray, 16-scanning sensor, 17-first micro switch, 18-second micro switch, 19-discharge roller, 2-printing module, 21-printing pressure wheel, 22-push rod, 23-printing paper discharge tray, 24-waste paper box, 241-first waste paper box, 242-second waste paper box, 243-third waste paper box, 25-first paper transfer roller, 26-second paper transfer roller, 27-first paper conveying roller, 28-second paper conveying roller, 29-paper lifting roller. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] The present invention relates to an image forming device and a printing method, which can form an image on a printing medium, the printing medium being, for example, paper or other medium capable of recording printing information, the printing medium comprising a demand medium and a waste medium, the demand medium being paper having at least one blank side and the blank side being capable of being printed by the image forming device, the waste medium being paper that cannot be printed by the image forming device, and in the case of using recycled paper, the demand medium and the waste medium are usually mixed together before use.

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] Figure 1 An image forming apparatus according to an embodiment of the present invention is schematically shown. Figure 1 As shown, the image forming device includes a scanning module 1 and a printing module 2.

[0044] like Figure 1 , Figure 2As shown, the scanning module 1 is arranged above the image forming device and is electrically connected to the body of the image forming device. The scanning module 1 includes a paper feed roller 11, a scanning feed roller 12 and a discharge roller 13. The rotation of the paper feed roller 11, the scanning feed roller 12 and the discharge roller 13 drives the paper to move in the scanning module 1 to form a path (paper path) for paper transportation. The scanning module 1 also includes a scanning paper feed tray 14, a scanning paper discharge tray 15, a scanning sensor 16 and a counter. The scanning paper feed tray 14 is used to input paper. The user can collect the recycled paper on the scanning paper feed tray 14, so that the scanning module 1 can sequentially pick up paper on the scanning paper feed tray 14. The scanning paper discharge tray 15 is used to collect the paper scanned by the scanning module 1, that is, the paper is discharged to the scanning paper discharge tray 15 after the scanning is completed. The path of the scanning module 1 is connected with the path of the printing module 2. The scanning module 1 is provided with a paper discharge roller 19, and the paper discharge roller 19 is used to discharge the paper on the scanning paper discharge tray 15 to the printing module 2. The scanning sensor 16 is a double-sided image reading device, which can be two contact image readers CIS. The paper passes between the two contact image readers, which can scan both sides of the paper at the same time. The counter is electrically connected to the scanning sensor 16 and is used to count the current paper. The counter is specifically an optical micro switch. The counter has a first micro switch 17 and a second micro switch 18. The first micro switch 17 is located on the downstream side of the scanning sensor 16, and the second micro switch 18 is located on the downstream side of the paper discharge roller 19. The second micro switch 18 is electrically connected to the printing module 2. The scanning module 1 records whether the current paper is blank on the top, blank on the bottom, or blank on both sides through the scanning sensor 16, and arranges it through the first micro switch 17. For example, the number "one" is blank on the top, "two" is blank on the bottom, "three" is blank on both sides, and "four" is no blank (i.e., both sides are scrapped). After recording, the paper will enter the scanning paper discharge tray 15 in sequence and be counted and arranged through the first micro switch 17.

[0045] like Figure 2As shown, the printing module 2 is used to perform printing work on paper. The printing module 2 includes an imaging unit, a push rod 22, a print paper discharge tray 23 and a waste paper box 24. The imaging unit is used to form an image on the paper. The imaging unit has a print pressure wheel 21. The printing work is performed by the print pressure wheel 21. The second micro switch 18 is set on the upstream side of the print pressure wheel 21, that is, the paper needs to pass through the second micro switch 18 before passing through the print pressure wheel 21. The push rod 22 is controlled by the printing module 2 to perform a pushing action to push the printed paper to a specified position. The print paper discharge tray 23 is used to collect the printed paper. The printed paper can be pushed to the print paper discharge tray 23 by controlling the push rod 22 for stacking and collection. The printing module 2 has a first paper transfer roller 25. The first paper transfer roller 25 is set on the upstream side of the print paper discharge tray 23. The push rod 22 can push the paper to the first paper transfer roller 25 so that the first paper transfer roller 25 can sequentially transfer the paper to the print paper discharge tray 23. The waste paper box 24 is used to collect waste paper, that is, paper that is input from the scanning paper discharge tray 15 and has not been printed. The waste paper box 24 can be a separately set paper box component, such as an area extending to the outside of the image forming device, or an area inside the image forming device for storing waste paper. The printing module 2 also has a second paper transfer roller 26, which is arranged on the upstream side of the waste paper box 24. The push rod 22 can push the paper to the second paper transfer roller 26 so that the second paper transfer roller 26 can transfer the paper to the waste paper box 24 in sequence. Of course, the printing module 2 also has an original paper box for storing new paper. Other structures of the printing module 2 can refer to the prior art.

[0046] Working principle: The user first collects the recycled paper (including the above-mentioned "one" type paper, "two" type paper, "three" type paper and "four" type paper) to the scanning paper feed tray 14. When setting the print job, the user selects the paper source as the scanning paper feed tray 14. When the print job starts, the scanning module 1 is activated, and the paper is taken from the scanning paper feed tray 14 and scanned in turn. When the paper passes through the scanning sensor 16, both sides of the paper can be scanned. After scanning, the scanning module 1 records the scanning information of each paper. When the paper is transmitted to the scanning paper discharge tray 15 in turn, it is arranged through the first micro switch 17. The paper blanks are screened and printed according to the paper blanks identified in the scanning stage, and the scanning information is formed into a print The printing instruction is transmitted to the printing module 2. For example, single-sided printing (only the blank on the top is printed), that is, the required media is "one" type paper and "three" type paper, and the scrapped media is "two" type paper and "four" type paper. When the paper passes through the second micro switch 18, the second micro switch 18 receives the information of obtaining "one" type paper and "three" type paper, and triggers the printing instruction of the printing module 2, that is, the printing pressure wheel 21 acts on the "one" type paper and "three" type paper. After printing is completed, the paper is pushed to the printing paper discharge tray 23 by the push rod 22. The "two" type paper and "four" type paper only pass through the printing pressure wheel 21 without performing the printing work, and are pushed into the waste paper box 24 by the push rod 22. Therefore, in the whole process, only the recycled paper needs to be concentrated on the scanning paper feed tray 14, and printing can be performed according to the user's needs, while the scrapped media are directly collected in the waste paper box 24, so as to realize the work of screening and reusing the recycled paper, and avoid the manual screening method.

[0047] like Figure 5 , Figure 6 As shown, the present application also provides a printing method of an image forming device, comprising the following steps:

[0048] S1, start the job to input the printing medium;

[0049] Scan the paper in the paper feed tray 14 as the printing source, and the scanning paper feed tray 14 can be set as the first paper source, and the original paper box is automatically selected as the printing paper source after the scanning paper feed tray 14 is empty;

[0050] S2, the scanning module scans the printing medium to obtain scanning information and transmits the scanning information to the printing module, and then delivers the scanned printing medium to the printing module;

[0051] The printing medium is the stacked required medium and the scrapped medium. The paper feed roller 11 and the scanning feed roller 12 are started to sequentially convey the paper to the scanning module 1 for scanning. The type of the paper is determined after double-sided scanning by the scanning sensor 16 and recorded in the scanning module 1.

[0052] S21, determining a matching result between the paper type of the printing medium and the paper type required to be printed by the printing module;

[0053] That is, the paper type of the paper is judged by the paper width sensor and paper length sensor of the scanning module. If the matching result of the paper type fails, the information on whether to switch the source of the printing medium is output. The user can choose whether to switch it. The image forming device controls the printing module to obtain the printing medium from other sources and execute the printing steps according to the switching result, or the image forming device executes the interception operation.

[0054] S22: If the paper type matching result is successful, the scanning module sequentially picks up paper from the scanning paper feed tray and obtains the scanning information P of the first page of printing medium to the nth page of printing medium. 1 -P n ;

[0055] S23, the scanning module discharges the scanned print medium onto the scanning paper discharge tray, and transmits the scan information to the printing module;

[0056] The scanned paper passes through the first micro switch 17 in sequence and is recorded in order, so that the scanning module 1 obtains the scanning information and sends it to the printing module 2; the counter transmits the scanning information to the printing module 2 in the form of instructions, so that the printing module 2 distinguishes the printing medium as the required medium or the scrapped medium.

[0057] S3, the printing module receives the scanned printing medium and the scanning information, and executes the printing step or directly outputs to the waste paper box according to the printing medium corresponding to the scanning information;

[0058] S31, the printing module sequentially inputs the printing media from the nth page to the first page from the scanning paper discharge tray, and obtains the scanning information P of the printing media from the nth page to the first page from the scanning information respectively. n -P 1 ;

[0059] S32, the printing module determines whether the current printing medium is the required medium;

[0060] After the type of the required medium is selected, the type of paper selected through the second micro switch 18 will trigger the second micro switch 18, so that the second micro switch 18 generates an electrical signal to the printing module 2, so that the printing module 2 can distinguish the type of paper when performing the printing task.

[0061] S33, the printing module performs a printing step on the required medium and discharges it to the print paper discharge tray; the printing module does not perform a printing step on the scrapped medium and discharges it to the waste paper tray.

[0062] When the printing module 2 receives the required medium, it executes the printing work, that is, when the selected paper type passes the second micro switch 18, the printing module 2 controls the printing pressure wheel 21 to execute the printing instruction, and controls the push rod 22 to push the paper to the printing paper output tray 23 after the printing is completed; when the printing module 2 receives the scrapped medium, that is, when the selected paper type does not pass the second micro switch 18, it directly passes the printing pressure wheel 21 without executing the printing work, and finally controls the push rod 22 to push the paper to the waste paper box 24. In this way, the required paper is directly printed, and the scrapped paper is not printed and directly output and separated.

[0063] S4. Printing is completed and the job ends.

[0064] In some embodiments, Figure 3 As shown, the user can set a plurality of waste paper boxes 24 for storing screened paper according to actual needs, that is, the waste paper box 24 includes a first waste paper box 241, a second waste paper box 242 and a third waste paper box 243. For example, the paper from the scanning paper feed tray 14 is selected as "one" type of paper, that is, "one" type of paper is the required medium, "two" type of paper, "three" type of paper and "four" type of paper are waste media. The purpose of this embodiment is to output "two" type of paper to the first waste paper box 241, "three" type of paper to the second waste paper box 242, and "four" type of paper to the third waste paper box 243. When the scanning module 1 is started, the paper is scanned on both sides by the scanning sensor 16 in turn, and the scanning module 1 records the "second" type of paper, the "third" type of paper and the "fourth" type of paper, and does not perform printing when passing through the printing module 2, that is, it directly passes through the printing pressure wheel 21 when passing through the second micro switch 18, and the printing module 2 controls the push rod 22 to push different types of paper into the first waste paper box 241, the second waste paper box 242 or the third waste paper box 243, so that the paper can be further classified. For the "second" type of paper, single-sided printing can still be performed (the blank side is placed upside down). After the user takes it out, it can be uniformly placed in the scanning paper feed tray 14 or the original paper box of the printing module 2 in the opposite direction, and can be used again. For the "third" type of paper, it can be reused, and the "fourth" type of paper is directly scrapped, so as to achieve more accurate classification of paper.

[0065] In some embodiments, a paper length sensor and a paper width sensor are provided on the scanning paper feed tray 14 to identify the paper type of the print medium placed on the scanning paper feed tray 14, that is, to identify the length and width of the recycled paper. When the paper on the scanning paper feed tray 14 does not match the paper type required by the printing module 2, the paper is not taken from the scanning paper feed tray 14, but the printing module 2 automatically takes the paper from the original paper box. Furthermore, the printing module 2 is provided with multiple paper delivery trays. When the scanning module 1 determines that there are multiple available paper types after scanning, its detection principle is the same as the above embodiment. An optical micro switch can be provided. When paper of the same paper type passes through the micro switch, the printing module 2 controls the push rod 22 to push it into a unified paper delivery tray, so that paper of different paper types can be discharged into different paper delivery trays, so that the user can distinguish recycled paper of different paper types.

[0066] In some embodiments, Figure 4 As shown, a method for flipping "second-class" paper for use is provided, wherein the printing module 2 is provided with a first paper conveying roller 27, a second paper conveying roller 28 and a paper lifting roller 29, and the first paper conveying roller 27, the second paper conveying roller 28, the paper lifting roller 29 and the printing pressure wheel 21 surround and form a paper path in the printing module 2. When the scanning module 1 scans that the paper is "second-class" paper, the printing module 2 does not perform printing, and its movement path is sequentially from the first paper conveying roller 27, the second paper conveying roller 28, the printing pressure wheel 21 When the "second" type of paper reaches the paper lifting roller 29, the printing module 2 controls the paper lifting roller 29 to move in the opposite direction, so as to drive the "second" type of paper to be transported along the first conveying paper roller 27, the second conveying paper roller 28, and the printing pressure wheel 21 to the paper lifting roller 29 in sequence, that is, it is transported twice. During the first transport (dashed line), the "second" type of paper is turned over. During the second transport (solid line), the printing module 2 directly controls the printing pressure wheel 21 to perform printing and output it to the printing paper output tray 23. Therefore, the "second" type of paper can also be directly printed without further classification, and the screening degree of recycled paper is wider.

[0067] The above description is only a preferred embodiment of the present invention. In order to make the description concise, not all possible combinations of the various technical features in the above embodiment are described, and the present invention is not limited in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An image forming device capable of forming an image on a printing medium, wherein the printing medium includes a required medium and a discarded medium, characterized in that: include: A scanning module, used for scanning the printing medium to obtain scanning information, wherein the scanning information is information about whether the upper side or the lower side of the printing medium is blank or both sides are blank or both sides are not blank; A printing module, wherein a paper path of the printing module is connected to a paper path of the scanning module, and the printing module has a waste paper box; The scanning module comprises a scanning paper feed tray, a scanning paper discharge tray, a scanning sensor and a counter, wherein the scanning sensor is a double-sided image sensing device, and the scanning sensor is used to scan the printing medium, and the counter comprises a first micro switch, and the first micro switch is located at the downstream side of the scanning sensor, and the scanning sensor records the scanning information each time it scans a printing medium, and arranges it through the first micro switch; The counter is electrically connected to the printing module, and the counter transmits the scanning information to the printing module, so that the printing module distinguishes the required medium from the discarded medium according to the scanning information; The printing medium passes through the scanning sensor from the scanning paper feed tray and records the scanning information, and then is arranged and output to the scanning paper discharge tray in sequence, and then enters the printing module from the scanning paper discharge tray. The printing module performs a printing job according to the scanning information, or outputs the scrapped medium to the waste paper box; The scanning module is provided with a paper length sensor and a paper width sensor for identifying the paper type of the printing medium, so that the scanning module controls the signal input from the printing medium to the printing module.

2. The image forming apparatus according to claim 1, wherein: The printing module has multiple paper delivery boxes. When the scanning module detects different paper types of the printing media through the paper length sensor and the paper width sensor, the detection information is obtained and transmitted to the printing module so that the printing module outputs the printing media of different paper types to different paper delivery boxes.

3. The image forming apparatus according to claim 1, wherein: The counter scans the waste media through the scanning sensor to output a classification signal to the printing module, the waste paper box includes a first waste paper box, a second waste paper box and a third waste paper box, the printing module outputs the waste media with one side scrapped to the first waste paper box, the printing module outputs the waste media with double sides blank to the second waste paper box, and the printing module outputs the waste media with double sides scrapped to the third waste paper box, so as to classify and stack the waste media.

4. The image forming apparatus according to claim 3, wherein: The printing module has a push rod for pushing the printing media, and the push rod pushes the waste media of different categories to the first waste paper box, the second waste paper box or the third waste paper box for classified stacking through the classification signal of the counter.

5. The image forming apparatus according to claim 1, wherein: When the scanning module detects the waste medium that is discarded on one side, the printing module controls the waste medium to move in the reverse direction so that the waste medium is turned over, and the printing module performs a printing operation on the turned waste medium.

6. The image forming apparatus according to claim 1, wherein: The printing module has a print paper discharge tray and a print pressure wheel. The print pressure wheel applies pressure to print the required medium and outputs the required medium to the print paper discharge tray. The print pressure wheel does not apply pressure so that the waste medium directly passes through the print pressure wheel and is output to the waste paper box.

7. A printing method of an image forming device, characterized in that: The image forming device according to claim 1, performing the following steps: S1, start the job to input the printing medium; S2, the scanning module scans the printing medium to obtain scanning information and transmits the scanning information to the printing module, and delivers the scanned printing medium to the printing module; the scanning information is information about whether the upper side of the printing medium is blank or the lower side is blank or both sides are blank or both sides are not blank; S3, the printing module receives the scanned printing medium and the scanning information, and executes the printing step or directly outputs to the waste paper box according to the printing medium corresponding to the scanning information; S4. Printing is completed and the job ends.

8. The printing method of the image forming device according to claim 7, characterized in that: The step S2 comprises: S21, determining a matching result between the paper type of the printing medium and the paper type required to be printed by the printing module; S22: If the paper type matching result is successful, the scanning module takes paper from the scanning paper feed tray in sequence and obtains the scanning information P1-P from the first page of printing medium to the nth page of printing medium. n ; S23, the scanning module discharges the scanned print medium onto the scanning paper discharge tray, and transmits the scan information to the printing module.

9. The printing method of the image forming device according to claim 8, characterized in that: If the paper type matching result fails in step S21, information on whether to switch the print medium source is output. According to the switching result, the printing module obtains the print medium from other sources and executes the printing step, or the image forming device executes the interception operation.

10. The printing method of the image forming apparatus according to claim 7, characterized in that: The step S3 comprises: S31, the printing module sequentially inputs the printing media from the nth page to the first page from the scanning paper discharge tray, and obtains the scanning information P of the printing media from the nth page to the first page from the scanning information respectively. n -P1; S32, the printing module determines whether the current printing medium is the required medium; S33, the printing module performs a printing step on the required medium and discharges it to the print paper discharge tray; the printing module does not perform a printing step on the scrapped medium and discharges it to the waste paper tray.

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