An envelope inkjet coding and gluing machine
By using the cylinder drive suction cup and flip plate adjustment mechanism in the envelope injection molding and glueing machine, the envelopes are transported in sequence, solving the problem of passing or stuck caused by the reduction of envelope thickness and improving work efficiency.
Patent Information
- Application Number
- CN202211004215.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-22
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2042-08-22
AI Technical Summary
After the envelope is compacted, the thickness of the existing envelope injection molding machine decreases, resulting in the thickness of the two envelopes being smaller than the gap between the baffle and the conveyor belt. Two envelopes may pass or get stuck between the baffle and the conveyor belt, resulting in low working efficiency.
An envelope injection molding and glueing machine is designed, using a cylinder-driven suction cup to suck the envelope out of the material box, and through a flap adjustment mechanism, the envelopes are transported to the conveyor belt in turn, ensuring that only one envelope is conveyed at a time and avoiding the two envelopes being transported at the same time.
By conveying envelopes in sequence, the problem of two envelopes passing through or stuck on the conveyor belt is avoided, and the working efficiency of the envelope injection molding and glueing machine is improved, and the need for downtime processing is reduced.
Smart Images

Figure CN115464931B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of envelope production, and in particular to an envelope inkjet gluing machine. Background Art
[0002] During the envelope production process, it is necessary to seal the tongue of the envelope and then perform inkjet coding on the surface of the envelope.
[0003] Before gluing and inkjet coding, the envelopes need to be laid flat on the surface of the conveyor belt. In the current prior art, most of the whole stack of envelopes is compacted. There is a baffle on one side of the envelopes, and there is a gap between the baffle and the conveyor belt, so that the envelopes pass through in sequence, and then the envelopes are laid flat on the surface of the conveyor belt.
[0004] In view of the above related technologies, the inventor believes that after the envelopes are compacted, the thickness will decrease, and the thickness of two envelopes is less than the gap between the baffle and the conveyor belt. Therefore, it is possible that two envelopes pass through or two envelopes are stuck between the baffle and the conveyor belt, which requires the staff to stop the machine for processing, and there is a defect of low work efficiency. Summary of the Invention
[0005] In order to improve the working efficiency of the envelope inkjet gluing machine, this application provides an envelope inkjet gluing machine.
[0006] An envelope inkjet gluing machine provided by this application adopts the following technical solutions:
[0007] An envelope inkjet gluing machine includes a machine body. Two conveyor belts are oppositely arranged along the length direction of the machine body. A material box is fixedly arranged at one side edge of the machine body. A notch is opened on the side wall of the material box facing the conveyor belt. A cross beam frame is arranged above the conveyor belt. The bottom of the cross beam frame is fixedly connected to the side walls on both sides of the machine body. A cylinder is fixedly arranged on the side wall of the top of the cross beam frame facing the material box. A suction cup is installed at the end of the piston rod of the cylinder close to the material box. A flap is obliquely arranged between the two conveyor belts. The flap is obliquely upward arranged along the direction from the material box to the cross beam frame. A fixing plate is arranged vertically on the lower surface of the flap close to the material box. The top end of the fixing plate is hinged to the flap, and the bottom end of the fixing plate is fixedly connected to the machine body. A compression assembly is arranged on the other side of the flap. An adjusting assembly for adjusting the compression assembly is arranged at the piston rod of the cylinder.
[0008] Through the above technical solution, the staff vertically place the envelopes to be processed in the material box. The air cylinder drives the suction cup to move and abut against the surface of the envelope. After the suction cup is adsorbed and connected to the envelope, the air cylinder drives the suction cup to move above the flap. At this time, the suction force of the suction cup disappears, and thus the envelope falls onto the upper surface of the flap. During the extension process of the piston rod of the air cylinder, the compression assembly is compressed through the adjustment assembly, so that the flap turns to a horizontal state. Thus, when the suction cup takes out the envelope from the material box next time, the previous envelope placed on the surface of the flap can be flipped and transported to the machine body for processing through the conveyor belt. The suction cup is used to transport the envelopes. Each time, the suction cup can only be adsorbed and connected to one envelope, and the situation where two envelopes are transported to the inkjet gluing area together will not occur. Therefore, there is no need for the staff to stop the machine, thus achieving the effect of improving work efficiency.
[0009] Optionally, guard plates are respectively arranged on the opposite sides of the two conveyor belts. The bottom of the guard plate is fixedly connected to the side wall of the machine body. The adjustment assembly includes a cross bar, two vertical bars and two wedge-shaped sliders. The piston rod of the air cylinder penetrates through the cross bar and is fixedly connected to the cross bar. The two vertical bars are arranged on the outer sides of the two guard plates in the vertical direction. The tops of the two vertical bars are respectively fixedly connected to the two ends of the cross bar. The two wedge-shaped sliders are respectively slidably connected to the outer walls of the guard plates in the horizontal direction. The bottoms of the two vertical bars are respectively abutted against the side walls of the wedge-shaped sliders away from the material box.
[0010] Through the above technical solution, the air cylinder makes the cross bar drive the two vertical bars to move, and the two vertical bars respectively push the two wedge-shaped sliders to slide, thereby adjusting the compression assembly and achieving the effect of the adjustment assembly adjusting the compression assembly.
[0011] Optionally, two support bars are fixedly arranged on the side wall of the cross beam frame facing the material box along the moving direction of the piston rod of the air cylinder. The two support bars are arranged on both sides of the air cylinder. The two support bars respectively penetrate through the two ends of the cross bar, and the cross bar is slidably connected to the support bars along the length direction of the support bars.
[0012] Through the above technical solution, the air cylinder makes the cross bar move along the support bars, and the support bars play a role in supporting the cross bar, achieving the effect of enhancing the stability of the cross bar during movement.
[0013] Optionally, a reset plate is fixedly arranged on the side of the guard plate close to the material box of the vertical bar. A first spring is fixedly arranged between the reset plate and the wedge-shaped slider.
[0014] Through the above technical solution, the vertical bar makes the wedge-shaped slider slide, thereby deforming the first spring. When the vertical bar returns to its original position, the first spring returns to its original state to make the wedge-shaped slider return to its original position, achieving the effect of the automatic reset of the wedge-shaped slider.
[0015] Optionally, a slide rail is horizontally opened on the outer wall of the guard plate along the length direction of the conveyor belt. A convex block slidably adapted to the slide rail is fixedly arranged on the side wall of the wedge-shaped slider facing the guard plate.
[0016] Through the above technical solution, the wedge-shaped slider enables the bump to slide along the slide rail, achieving the effect of enhancing the stability when the wedge-shaped slider moves.
[0017] Optionally, the compression assembly includes a moving plate and a second spring. The moving plate is arranged vertically on the side of the lower surface of the flap away from the material box. The top end of the moving plate is hinged to the flap. The second spring is fixedly arranged between the machine body and the moving plate. Pressing rods are fixedly arranged on the side walls of the moving plate facing the guard plate. Avoidance grooves which are slidably matched with the pressing rods are vertically penetrated through the side wall of the guard plate. One end of the pressing rod away from the moving plate passes through the avoidance groove and extends to the outside of the guard plate.
[0018] Through the above technical solution, the wedge-shaped slider enables the pressing rod to move along the avoidance groove, thereby enabling the moving plate to move and compress the second spring, and further adjusting the flap to a horizontal state; after the wedge-shaped slider resets, the second spring returns to its original state to reset the moving plate and the pressing rod, thereby adjusting the flap to an inclined state to receive the next envelope. Through the above structure, the effect of sequentially conveying the envelopes is achieved.
[0019] Optionally, a roller is rotatably connected to one end of the pressing rod away from the moving plate.
[0020] Through the above technical solution, the wedge-shaped slider squeezes the pressing rod by squeezing the roller. During the squeezing process, the roller will rotate, making it difficult for the wedge-shaped slider to get stuck during the sliding process, achieving the effect of smooth sliding of the wedge-shaped slider.
[0021] Optionally, a push plate is arranged in the material box, and a third spring is fixedly arranged between the inner wall of the material box on the side opposite to the notch and the push plate.
[0022] Through the above technical solution, the staff vertically places the envelope in the material box to compress the third spring. Every time the suction cup extracts an envelope, the third spring restores the corresponding deformation amount, thereby achieving the effect that the envelope on the surface is always aligned with the notch end face.
[0023] Optionally, two baffles are oppositely arranged at the notch of the material box. The opposite sides of the two baffles are fixedly connected to the side walls of the material box, and a gap is left between the two baffles.
[0024] Through the above technical solution, the baffle can prevent the second spring from ejecting the envelope out of the material box, playing a role in limiting the envelope. The suction cup can extract the envelope from the gap between the two baffles, achieving the effect of the baffle limiting the envelope.
[0025] Optionally, a flexible layer is arranged on the surface of the baffle facing the inner wall of the material box.
[0026] With the above technical solution, when the suction cup extracts the envelope, the envelope deforms, and thus through the gap between the two baffles, the flexible layer makes it difficult for the envelope to undergo irrecoverable deformation, achieving the effect of protecting the envelope.
[0027] In summary, the present application includes at least one of the following beneficial technical effects:
[0028] 1. The staff places the envelope vertically in the material box. The air cylinder moves the suction cup to the surface of the envelope. After the suction cup sucks out the envelope, the air cylinder moves the suction cup above the flap. The disappearance of the suction force of the suction cup causes the envelope to fall onto the flap. By driving the adjusting component with the air cylinder to compress the compression component, the flap is turned to the horizontal state, and the conveyor belt transports the envelope to the inkjet gluing area. The suction cup can only adsorb and connect one envelope each time, and there will be no situation where two envelopes are transported to the inkjet gluing area together. Therefore, there is no need for the staff to stop the machine for processing, thus achieving the effect of improving work efficiency;
[0029] 2. The air cylinder makes the two vertical rods respectively push the two wedge-shaped sliders to slide through the cross bar, thereby adjusting the compression component, achieving the effect of the adjusting component adjusting the compression component;
[0030] 3. The wedge-shaped slider drives the moving plate to move through the pressing rod, thereby adjusting the flap to the horizontal state. At this time, the second spring is in a compressed state; after the wedge-shaped slider resets, the second spring drives the moving plate and the pressing rod to reset, thereby adjusting the flap to the inclined state to receive the next envelope. Through the above structure, the effect of sequentially transporting the envelopes is achieved. Description of the Drawings
[0031] Figure 1 is a schematic structural diagram of an envelope inkjet gluing machine according to an embodiment of the present application;
[0032] Figure 2 is a partial schematic diagram showing the internal structure of the material box according to an embodiment of the present application;
[0033] Figure 3 is a partial schematic diagram showing the structure of the adjusting component according to an embodiment of the present application;
[0034] Figure 4 is a partial schematic diagram showing the side wall structure of the guard plate according to an embodiment of the present application;
[0035] Figure 5 is a schematic diagram showing the structure of the compression component according to an embodiment of the present application.
[0036] In the figure, 1 is the machine body; 11 is the conveyor belt; 12 is the guard plate; 121 is the slide rail; 122 is the avoidance groove; 2 is the material box; 21 is the notch; 22 is the push plate; 23 is the third spring; 24 is the baffle; 241 is the flexible layer; 3 is the cross beam frame; 31 is the air cylinder; 311 is the suction cup; 32 is the support rod; 4 is the flap; 41 is the fixed plate; 5 is the compression assembly; 51 is the moving plate; 511 is the pressing rod; 512 is the roller; 52 is the second spring; 6 is the adjustment assembly; 61 is the cross bar; 62 is the vertical bar; 63 is the wedge-shaped slider; 631 is the convex block; 7 is the reset plate; 71 is the first spring. Detailed implementation mode
[0037] The following will Figures 1-5 make a further detailed description of this application in conjunction with the attached
[0038] The embodiment of this application discloses an envelope inkjet coding and gluing machine.
[0039] Refer to Figure 1 , an envelope inkjet coding and gluing machine includes a machine body 1. Two conveyor belts 11 are oppositely arranged along the length direction of the machine body 1. A material box 2 for placing envelopes to be processed is fixedly arranged between one side of the machine body 1 and the conveyor belt 11. A cross beam frame 3 is arranged above the conveyor belt 11. A cylinder 31 is fixedly arranged on the side wall of the cross beam frame 3 facing the material box 2. One end of the piston rod of the cylinder 31 close to the material box 2 is fixedly provided with a suction cup 311. An adjustment assembly 6 is arranged at the piston rod of the cylinder 31. A flap 4 is arranged between the two conveyor belts 11. The flap 4 is gradually inclined upward along the direction away from the material box 2. The bottom surface of the flap 4 is flush with the upper surface of the conveyor belt 11. A compression assembly 5 is arranged on the lower surface of the flap 4.
[0040] The staff vertically places the envelopes to be processed in the material box 2. The cylinder 31 drives the suction cup 311 to move to adsorb on the surface of the envelope, and then the cylinder 31 moves the suction cup 311 above the flap 4. The suction of the suction cup 311 is turned off, and the envelope falls onto the surface of the flap 4. When the cylinder 31 moves towards the material box 2, the cylinder 31 drives the adjustment assembly 6 to adjust the compression assembly 5, so as to adjust the flap 4 to a horizontal state. At this time, both sides of the envelope are in contact with the conveyor belt 11, and the conveyor belt 11 transports the envelope to the inkjet coding and gluing area for processing; when the cylinder 31 moves away from the material box 2, the adjustment assembly 6 and the compression assembly 5 are reset, so that the flap 4 returns to the inclined state. Through the above structure, when the cylinder 31 and the suction cup 311 suck a new envelope from the material box 2, the previous envelope placed on the upper surface of the flap 4 can be transported into the machine body through the conveyor belt 11, and the two are carried out synchronously, thereby improving the working efficiency of the envelope inkjet coding and gluing machine.
[0041] Refer to Figure 2, a notch 21 is formed on one side of the material box 2 facing the conveyor belt 11. A push plate 22 is arranged inside the material box 2. A third spring 23 is fixedly arranged between the inner wall of the material box 2 on the side opposite to the notch 21 and the push plate 22. Two baffles 24 are oppositely arranged at the notch 21 of the material box 2. The sides of the two baffles 24 facing away from each other are fixedly connected to the side wall of the material box 2. A flexible layer 241 is fixedly pasted on the side wall of the baffle 24 facing the push plate 22. In the embodiment of the present application, the flexible layer 241 is a rubber pad.
[0042] The staff fills the material box 2 with envelopes to be processed. The envelopes compress the third spring 23 to its maximum deformation. After the first envelope on the surface at the notch 21 of the suction cup 311 is adsorbed and connected, the suction force of the suction cup 311 extracts the envelope from the material box 2. The third spring 23 restores the corresponding deformation and moves the remaining envelopes in the material box 2 towards the notch 21.
[0043] Reference Figure 1 and Figure 2 , the bottom of the cross beam frame 3 is fixedly connected to both sides of the machine body 1. The air cylinder 31 is fixedly arranged at the middle position on the top of the cross beam frame 3. Two support rods 32 are fixedly arranged on the side wall of the cross beam frame 3 facing the material box 2. The two support rods 32 are arranged on both sides of the air cylinder 31. The length direction of the two support rods 32 is parallel to the moving direction of the piston rod of the air cylinder 31; Guard plates 12 are arranged on both sides of the two conveyor belts 11 facing away from each other. The guard plates 12 are fixedly connected to the machine body 1.
[0044] Reference Figure 3 and Figure 4 , sliding rails 121 are horizontally and fixedly arranged on the outer walls of the two guard plates 12 along the length direction of the conveyor belt 11. The adjusting assembly 6 includes a cross bar 61, two vertical bars 62 and two wedge-shaped sliders 63. The surfaces of the two wedge-shaped sliders 63 facing the material box 2 are inclined surfaces. A convex block 631 that is slidably adapted to the sliding rail 121 is fixedly arranged on the side wall of the wedge-shaped slider 63 facing the guard plate 12. The piston rod of the air cylinder 31 penetrates through. The two ends of the cross bar 61 extend to the outside of the two guard plates 12, and the cross bar 61 is arranged horizontally and fixedly connected to the piston rod. The two vertical bars 62 are respectively arranged vertically on the sides of the two guard plates 12 facing away from each other. The tops of the two vertical bars 62 are respectively fixedly connected to the two ends of the cross bar 61. The bottoms of the two vertical bars 62 are both located on the side of the wedge-shaped slider 63 away from the inclined surface; A reset plate 7 is fixedly arranged on the outer wall of the guard plate 12 on the side of the wedge-shaped slider 63 away from the inclined surface. A first spring 71 is fixedly arranged between the reset plate 7 and the wedge-shaped slider 63.
[0045] When the piston rod of the air cylinder 31 moves towards the material box 2, the piston rod of the air cylinder 31 drives the cross bar 61 to move. The cross bar 61 drives two vertical bars 62 to drive two wedge-shaped sliders 63 to slide along the slide rail 121. The wedge-shaped sliders 63 stretch the first spring 71, and the movement process of the wedge-shaped sliders 63 adjusts the compression assembly 5. When the piston rod of the air cylinder 31 moves away from the material box 2, the piston rod of the air cylinder 31 drives the two vertical bars 62 to reset through the cross bar 61, and the first spring 71 returns to its original state to drive the wedge-shaped sliders 63 to reset, so that the compression assembly 5 is reset.
[0046] Reference Figure 3 and Figure 5 As shown in the figure, on one side of the lower surface of the flap 4 near the bottom end of the flap 4, a fixed plate 41 is arranged vertically. The top end of the fixed plate 41 is hinged to the flap 4, and the bottom end of the fixed plate 41 is fixedly connected to the machine body 1. On one side of the lower surface of the top end of the flap 4, a moving plate 51 is arranged vertically. The top end of the moving plate 51 is hinged to the flap 4, and two second springs 52 are fixedly arranged between the bottom end of the moving plate 51 and the machine body 1. The two second springs 52 are arranged on both sides of the moving plate 51. On the side walls of the moving plate 51 facing the guard plate 12, pressing rods 511 are fixedly arranged. On the outer wall of the guard plate 12, an avoidance groove 122 that is slidably matched with the pressing rods 511 is opened vertically. The pressing rods 511 pass through the avoidance groove 122 to the outside of the guard plate 12, and rollers 512 are rotatably connected to the pressing rods 511 on the outside of the guard plate 12.
[0047] When the piston rod of the air cylinder 31 moves towards the material box 2, the inclined surface of the wedge-shaped slider 63 drives the pressing rod 511 to move along the avoidance groove 122 by squeezing the roller 512, thereby driving the moving plate 51 to move and compressing the second spring 52, so as to adjust the flap 4 to the horizontal state. When the piston rod of the air cylinder 31 moves away from the material box 2, after the wedge-shaped slider 63 is reset, the second spring 52 returns to its original state to drive the moving plate 51 and the pressing rod 511 to reset, so as to adjust the flap 4 to the inclined state.
[0048] The implementation principle of an envelope inkjet gluer in an embodiment of this application is as follows: The staff places the envelope in the material box 2. The air cylinder 31 moves towards the material box 2 so that the suction cup 311 abuts against the envelope. The suction of the suction cup 311 is turned on to adsorb the envelope on the suction cup 311. The air cylinder 31 moves away from the material box 2, and the envelope is transported above the flap 4 through the suction cup 311. The suction of the suction cup 311 is turned off to make the envelope fall onto the surface of the flap 4. During the process of the air cylinder 31 moving towards the material box 2, the air cylinder 31 drives two vertical rods 62 to move through the cross bar 61, thereby driving two wedge-shaped sliders 63 to slide. The wedge-shaped sliders 63 squeeze the rollers 512 to move the pressing rod 511, thereby driving the moving plate 51 to move, and thus adjusting the flap 4 to a horizontal state. When the piston rod of the air cylinder 31 moves away from the material box 2, the piston rod of the air cylinder 31 drives the two vertical rods 62 to reset through the cross bar 61. The first spring 71 drives the wedge-shaped slider 63 to reset, so that the pressing rod 511 resets. The second spring 52 returns to its original state to drive the moving plate 51 to reset, and thus adjusts the flap 4 to an inclined state. Through the above structure, the effect of improving the working efficiency of the envelope inkjet gluer is achieved.
[0049] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. An envelope inkjet gluing machine, comprising a machine body (1). Two conveyor belts (11) are oppositely arranged inside the machine body (1) along its own length direction. It is characterized in that: A material box (2) is fixedly arranged at one side edge of the machine body (1). A notch (21) is formed in the side wall of the material box (2) facing the conveyor belt (11). A cross beam frame (3) is arranged above the conveyor belt (11). The bottom of the cross beam frame (3) is fixedly connected to the side walls on both sides of the machine body (1). A cylinder (31) is fixedly arranged on the side wall of the top of the cross beam frame (3) facing the material box (2). A suction cup (311) is installed at the end of the piston rod of the cylinder (31) close to the material box (2). A flap (4) is obliquely arranged between the two conveyor belts (11). The flap (4) is obliquely arranged upward from the material box (2) towards the cross beam frame (3). A fixing plate (41) is arranged along the vertical direction on one side of the lower surface of the flap (4) close to the material box (2). The top end of the fixing plate (41) is hinged to the flap (4), and the bottom end of the fixing plate (41) is fixedly connected to the machine body (1). A compression assembly (5) is arranged on the other side of the flap (4). An adjusting assembly (6) for adjusting the compression assembly (5) is arranged at the piston rod of the cylinder (31). Guard plates (12) are respectively arranged on the opposite sides of the two conveyor belts (11). The bottom of the guard plate (12) is fixedly connected to the side wall of the machine body (1). The adjusting assembly (6) includes a cross bar (61), two vertical bars (62) and two wedge-shaped sliders (63). The piston rod of the cylinder (31) penetrates through the cross bar (61) and is fixedly connected to the cross bar (61). The two vertical bars (62) are arranged along the vertical direction on the outer sides of the two guard plates (12). The top ends of the two vertical bars (62) are respectively fixedly connected to the two ends of the cross bar (61). The two wedge-shaped sliders (63) are respectively slidably connected to the outer wall of the guard plate (12) along the horizontal direction. The bottom ends of the two vertical bars (62) are respectively abutted against the side walls of the wedge-shaped sliders (63) far from the material box (2). Two support rods (32) are fixedly arranged on the side wall of the cross beam frame (3) facing the material box (2) along the moving direction of the piston rod of the cylinder (31). The two support rods (32) are arranged on both sides of the cylinder (31). The two support rods (32) respectively penetrate through the two ends of the cross bar (61), and the cross bar (61) is slidably connected to the support rods (32) along the length direction of the support rods (32). A reset plate (7) is fixedly arranged on the guard plate (12) on the side of the vertical bar (62) close to the material box (2). A first spring (71) is fixedly arranged between the reset plate (7) and the wedge-shaped slider (63). A slide rail (121) is horizontally and fixedly arranged on the outer wall of the guard plate (12) along the length direction of the conveyor belt (11). A convex block (631) slidably adapted to the slide rail (121) is fixedly arranged on the side wall of the wedge-shaped slider (63) facing the guard plate (12). The compression assembly (5) includes a moving plate (51) and a second spring (52). The moving plate (51) is arranged vertically on the side of the lower surface of the flap (4) away from the material box (2). The top end of the moving plate (51) is hinged to the flap (4). The second spring (52) is fixedly arranged between the machine body (1) and the moving plate (51). Pressing rods (511) are fixedly arranged on the side walls of the moving plate (51) facing the guard plate (12). Avoidance grooves (122) which are slidably adapted to the pressing rods (511) are vertically formed through the side walls of the guard plate (12). One end of the pressing rod (511) away from the moving plate (51) passes through the avoidance groove (122) and extends to the outside of the guard plate (12). A roller (512) is rotatably connected to one end of the pressing rod (511) away from the moving plate (51).
2. An envelope inkjet gluing machine according to claim 1, characterized in that: A push plate (22) is arranged in the material box (2). A third spring (23) is fixedly arranged between the inner wall of the material box (2) on the side of the push plate (22) opposite to the notch (21).
3. An envelope inkjet gluing machine according to claim 1, characterized in that: Two baffle plates (24) are oppositely arranged at the notch (21) of the material box (2). The sides of the two baffle plates (24) facing away from each other are fixedly connected to the side walls of the material box (2). A gap is left between the two baffle plates (24).
4. An envelope inkjet gluing machine according to claim 3, characterized in that: A flexible layer (241) is arranged on the surface of the baffle plate (24) on the side facing the inner wall of the material box (2).
Citation Information
Patent Citations
Supply device for envelope type express items and sorting system
CN112295927A