CN111167729A - Overweight sorting machine of mail - Google Patents
Overweight sorting machine of mail Download PDFInfo
- Publication number
- CN111167729A CN111167729A CN202010131989.5A CN202010131989A CN111167729A CN 111167729 A CN111167729 A CN 111167729A CN 202010131989 A CN202010131989 A CN 202010131989A CN 111167729 A CN111167729 A CN 111167729A
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- China
- Prior art keywords
- cam
- wall
- detection channel
- chamber
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C3/00—Sorting according to destination
- B07C3/02—Apparatus characterised by the means used for distribution
- B07C3/08—Apparatus characterised by the means used for distribution using arrangements of conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/16—Sorting according to weight
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- Sorting Of Articles (AREA)
Abstract
The invention discloses a mail overweight sorting machine, which comprises a machine body, wherein a detection channel is arranged in the machine body in a left-right through way, a conveying detection device is arranged at the lower side of the detection channel and comprises three transmission cavities which are communicated with the lower wall of the detection channel and have leftward openings, a first rotating shaft is rotatably arranged between the front wall and the rear wall of the transmission cavities at the left-right symmetrical positions, a belt wheel is fixedly arranged in each transmission cavity of the first rotating shaft, a conveying belt is wound between the belt wheels at the left side and the right side, a jacking device is arranged at the lower side of the detection channel, and a buffer device is arranged at the rear side of the detection channel. The error caused by manual detection is obviously reduced, the working efficiency is improved, and the labor intensity is reduced.
Description
Technical Field
The invention relates to the technical field of mail sorting, in particular to a mail overweight sorting machine.
Background
The Chinese logistics industry starts late, along with the rapid development of national economy, the Chinese logistics industry keeps a rapid growth speed, a logistics system is continuously perfect, the industry runs increasingly mature and standard, and some mails wrapped by the mails and the like possibly exceed the standard in quality and need to be sorted, but the traditional manual sorting often generates errors, the efficiency is low, the labor cost is increased, the automation level is poor, and emergency treatment measures are not in place. The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows:
traditional manual sorting often can produce the mistake, and is inefficient, and increases the human cost, and the automation level is relatively poor, and emergency treatment measures are not in place.
In order to solve the problems, the present embodiment designs an overweight sorting machine for mails, which comprises a machine body, wherein a detection channel is arranged in the machine body in a left-right through manner, a conveying detection device is arranged at the lower side of the detection channel, the conveying detection device comprises three transmission cavities which are communicated with the lower wall of the detection channel and have leftward openings, a first rotating shaft is rotatably arranged between the front wall and the rear wall of the transmission cavities in the left-right symmetrical position, a belt wheel is fixedly arranged in each transmission cavity of the first rotating shaft, a conveying belt is wound between the belt wheels at the left side and the right side, the upper end surface of the conveying belt is lower than the lower wall of the detection channel, ejector rod cavities are uniformly distributed on the upper end surface and the lower end surface of the conveying belt, ejector rods with one ends capable of extending to the outside are arranged in the ejector rod cavities in a vertical sliding manner, a rubber block is fixedly arranged at one end of the ejector rod extending to the outside, when the ejector rod is positioned above, the upper end of the ejector rod can extend into the detection channel and is higher than the lower wall of the detection channel, the lower side of the detection channel is provided with a jacking device, the jacking device comprises a blocking block fixedly arranged on the lower wall of the detection channel, when the mail is overweight, the first spring cannot bear the weight of the mail, the top ejector rod is pressed downwards to slide, the lower end surface of the mail is contacted with the lower wall of the detection channel and blocked by the blocking block, a buffer device is arranged at the rear side of the detection channel and comprises a third fixed shaft arranged in the rear wall of the detection channel, a first workpiece outlet is communicated and arranged between the buffer cavity and the detection channel and on the left side of the blocking block, and blocked overweight mails enter the buffer cavity through the first workpiece outlet. Preferably, the conveying and detecting device comprises a supporting plate which is symmetrically and fixedly arranged at the front and back of the left end face of the machine body, a row of first fixing shafts are uniformly distributed and fixedly arranged between the supporting plates, a first roller is rotatably arranged on the first fixing shafts, the upper end face of the first roller is lower than the lower wall of the detection channel, the left rear side of the first roller is arranged in the rear wall of the transmission cavity and fixedly provided with a first motor at the rear side of the first rotating shaft, the left side of the first rotating shaft is connected with the first motor at the rear end of the first rotating shaft in a power mode, a roller cavity is communicated with the right end of the lower wall of the detection channel, a second fixing shaft is rotatably arranged between the front wall and the rear wall of the roller cavity, and the upper end of the second fixing shaft.
Preferably, the jacking device is located including the intercommunication the test passage lower wall just in the chamber of accomodating of both sides around the transmission chamber, it is located to accomodate the chamber the left side of stopping the piece, accomodate chamber lower wall in gliding slide bar that is equipped with from top to bottom, slide bar upper end with accomodate the intracavity fixed and be equipped with the fixed block, be equipped with the ascending cylinder groove of opening on the fixed block, rotatable third fixed axle that is equipped with between the wall about the cylinder groove, fixed being equipped with upper end on the third fixed axle stretches out the third cylinder in cylinder groove.
Preferably, in the detection channel lower wall and in the downside of slide bar is equipped with the cam chamber, rotatable second pivot that is equipped with between the wall around the cam chamber, in the cam chamber antetheca and in the fixed second motor that is equipped with in front side of second pivot, second pivot front end power connect in the second motor, in the second pivot and in the below of slide bar is from fixed first cam, second cam, third cam and the fourth cam of being equipped with forward in proper order, first cam the second cam the third cam with the protruding end radius of fourth cam increases in proper order.
Preferably, the lower end of the sliding rod extends to the cam cavity and is provided with a roller groove with a downward opening, the roller groove is provided with a roller with a lower end extending out of the roller groove, a limiting cavity is arranged in the lower wall of the accommodating cavity, the sliding rod penetrates through the limiting cavity, a limiting block is arranged in the limiting cavity in a vertically sliding mode, a fourth spring is fixedly connected between the limiting cavity inner wall and the limiting cavity inner wall, and under the action of the fourth spring, the roller always abuts against the first cam, the second cam, the third cam and the fourth cam below the roller groove.
Preferably, the buffer device comprises a second workpiece outlet which is communicated with the lower end of the rear wall of the buffer cavity and has a backward opening, an elevating block is arranged in the buffer cavity in a vertically sliding manner, supporting blocks are arranged at the front and back symmetrical positions of the upper end surface of the elevating block, a connecting block is rotatably arranged between the supporting blocks, a workpiece placing table is fixedly arranged at the upper end of the connecting block, two second springs are fixedly arranged at the left and right symmetrical positions between the workpiece placing table and the elevating block, a third spring is fixedly connected between the elevating block and the lower wall of the buffer cavity, an insertion hole is formed in the front end of the elevating block in a vertically through manner, a fixing rod is fixedly arranged at the lower wall of the buffer cavity and below the insertion hole, when the elevating block slides downwards to the lower limit position, the fixing rod passes through the insertion hole to abut against the front end of the lower end surface of the workpiece placing table, the overweight mails slide out of the buffer cavity from the upper end face of the object placing table.
The invention has the beneficial effects that: the invention can effectively and quickly detect whether the mails meet the weight standard, screens the mails which do not meet the weight standard, avoids the condition of inaccurate detection result caused by the fact that a plurality of mails enter the detection at the same time during the detection, obviously reduces the error caused by manual detection, improves the working efficiency and reduces the labor intensity.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
Fig. 1 is a schematic view of the overall structure of an overweight sorting machine for postal articles according to the invention;
3 FIG. 32 3 is 3 a 3 sectional 3 view 3 taken 3 in 3 the 3 direction 3 " 3 A 3- 3 A 3" 3 of 3 FIG. 31 3; 3
FIG. 3 is a sectional view taken in the direction "B-B" of FIG. 1;
fig. 4 is a sectional view taken along the direction "C-C" of fig. 3.
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a mail overweight sorting machine, which is mainly applied to overweight detection of mail packages and the like and screening of overweight mails or packages, and the invention is further explained by combining the attached drawings of the invention:
the invention relates to a mail overweight sorting machine, which comprises a machine body 11, wherein a detection channel 12 is arranged in the machine body 11 in a left-right through way, a conveying detection device 101 is arranged at the lower side of the detection channel 12, the conveying detection device 101 comprises three transmission cavities 16 which are communicated with the lower wall of the detection channel 12 and have leftward openings, a first rotating shaft 17 is rotatably arranged between the front wall and the rear wall of the transmission cavities 16 at the left-right symmetrical positions, a belt wheel 19 is fixedly arranged in each transmission cavity 16 of the first rotating shaft 17, a conveying belt 20 is wound between the belt wheels 19 at the left side and the right side, the upper end surface of the conveying belt 20 is lower than the lower wall of the detection channel 12, ejector rod cavities 21 are uniformly arranged on the upper end surface and the lower end surface of the conveying belt 20, an ejector rod 22 with one end capable of extending to the outside is arranged in the ejector rod cavity 21 in a vertical sliding way, a, the rubber block 24 is fixedly arranged at one end of the ejector rod 22 extending outwards, when the ejector rod 22 is positioned above, the upper end of the ejector rod 22 can extend into the detection channel 12 and is higher than the lower wall of the detection channel 12, the lower side of the detection channel 12 is provided with the jacking device 102, the jacking device 102 comprises a blocking block 25 fixedly arranged at the lower wall of the detection channel 12, when the mail is overweight, the first spring 23 cannot bear the weight of the mail, the ejector rod 22 above is pressed down and slides, the lower end face of the mail is contacted with the lower wall of the detection channel 12 and is blocked by the blocking block 25, the rear side of the detection channel 12 is provided with the buffer device 103, the buffer device 103 comprises a third fixed shaft 33 arranged in the rear wall of the detection channel 12, a first piece outlet 45 is communicated between the buffer cavity 44 and the detection channel 12 and on the left side of the blocking block 25, the blocked overweight mail enters the buffer chamber 44 through the first outlet 45.
Advantageously, as will be described in detail below, the conveying detection device 101 includes a supporting plate 13 fixed to the front and back of the left end face of the machine body 11, a row of first fixed shafts 14 are uniformly distributed and fixedly arranged among the supporting plates 13, a first roller 15 is rotatably arranged on each first fixed shaft 14, the upper end surface of the first roller 15 is lower than the lower wall of the detection channel 12, a first motor 18 is fixedly arranged in the rear wall of the transmission cavity 16 at the rearmost side on the left side and at the rear side of the first rotating shaft 17, the rear end of the first rotating shaft 17 on the left side is in power connection with the first motor 18, a roller cavity 26 is communicated with the right end of the lower wall of the detection channel 12, a second fixed shaft 27 is rotatably arranged between the front wall and the rear wall of the roller cavity 26, the second fixed shaft 27 is fixedly provided with a second roller 28, the upper end of which slightly extends into the detection channel 12.
Beneficially, as detailed in the following description of the jacking device 102, the jacking device 102 includes a receiving cavity 29 disposed in the lower wall of the detection channel 12 and located at the front side and the rear side of the transmission cavity 16, the receiving cavity 29 is located at the left side of the blocking block 25, a sliding rod 30 is slidably disposed in the lower wall of the receiving cavity 29 up and down, a fixed block 31 is fixedly disposed at the upper end of the sliding rod 30 and in the receiving cavity 29, a roller groove 32 with an upward opening is disposed on the fixed block 31, a third fixed shaft 33 is rotatably disposed between the left wall and the right wall of the roller groove 32, and a third roller 34 with an upper end extending out of the roller groove 32 is fixedly disposed on the third fixed shaft 33.
Beneficially, a cam cavity 35 is disposed in a lower wall of the detection channel 12 and at a lower side of the slide rod 30, a second rotating shaft 36 is rotatably disposed between a front wall and a rear wall of the cam cavity 35, a second motor 37 is fixedly disposed in a front wall of the cam cavity 35 and at a front side of the second rotating shaft 36, a front end of the second rotating shaft 36 is dynamically connected to the second motor 37, a first cam 38, a second cam 39, a third cam 40 and a fourth cam 41 are fixedly disposed on the second rotating shaft 36 and below the slide rod 30 from back to front, and protruding end radii of the first cam 38, the second cam 39, the third cam 40 and the fourth cam 41 are sequentially increased.
Beneficially, the lower end of the slide rod 30 extends into the cam cavity 35 and is provided with a roller groove 42 with a downward opening, a roller 43 with a lower end extending out of the roller groove 42 is rotatably arranged between the front wall and the rear wall of the roller groove 42, a limit cavity 55 is arranged in the lower wall of the accommodating cavity 29, the slide rod 30 penetrates through the limit cavity 55, a limit block 56 is arranged in the limit cavity 55 in a vertically slidable manner, a fourth spring 57 is fixedly connected between the limit block 56 and the inner wall of the limit cavity 55, and under the action of the fourth spring 57, the roller 43 always abuts against the first cam 38, the second cam 39, the third cam 40 and the fourth cam 41 below.
Advantageously, as will be described in detail below, the buffer device 103 includes a second workpiece outlet 46 communicating with a lower end of a rear wall of the buffer chamber 44 and having a rearward opening, an elevating block 47 is slidably disposed in the buffer chamber 44 up and down, support blocks 48 are disposed at front and rear symmetrical positions on an upper end surface of the elevating block 47, a connecting block 49 is rotatably disposed between the support blocks 48, a platform 50 is fixedly disposed at an upper end of the connecting block 49, two second springs 51 are fixedly disposed at left and right symmetrical positions between the platform 50 and the elevating block 47, a third spring 52 is fixedly connected between the elevating block 47 and a lower wall of the buffer chamber 44, a through hole 53 is disposed at a front end of the elevating block 47, a fixing rod 54 is fixedly disposed at a lower wall of the buffer chamber 44 and below the through hole 53, when the elevating block 47 slides down to a lower limit position, the fixing rod 54 passes through the insertion hole 53 and abuts against the front end of the lower end face of the object placing table 50, so that the object placing table 50 tilts backwards, and overweight mails slide out of the buffer cavity 44 from the upper end face of the object placing table 50.
The steps of using an overweight sorting machine for mail according to the present invention are described in detail below with reference to fig. 1 to 4:
at the beginning, the slide rod 30 is at the lower limit position, the lifting block 47 is at the upper limit position, and the upper end surface of the object placing table 50 is lower than the lower wall of the detection channel 12.
When the detection device works, mails are conveyed to the upper part of the first roller 15 by the conveyor belt and stop after the mails slide right to abut against the right end face of the detection channel 12, the first motor 18 is started to drive the first rotating shaft 17 to rotate, the belt wheel 19 rotates and drives the conveyor belt 20 to transmit, the ejector rod 22 and the rubber block 24 at the leftmost side abut against the lower end face of the mails, the friction force between the rubber block 24 and the mails drives the right sides of the mails to be lifted upwards and enter the detection channel 12, so that only one mail can be detected at each time without the condition that the mails enter side by side to cause inaccurate detection, when the mails are overweight, the first spring 23 cannot bear the weight of the mails, the ejector rod 22 at the upper part is pressed downwards to slide, the lower end face of the mail is in contact with the lower wall of the detection channel 12 and is blocked by the blocking block 25, at the moment, the second motor 37 is started to drive the second rotating shaft 36 to, The second cam 39, the third cam 40 and the fourth cam 41 are turned to jack the slide bar 30, so that the third roller 34 jacks up the mails, the height of the third roller 34 is gradually reduced from front to back, then the overweight mails slide down into the first mail outlet 45, at this time, under the action of the fourth spring 57, the slide bar 30 slides down again to return to the initial state, the mails meeting the standard are jacked up by the jacking rod 22 and cannot contact with the lower wall of the detection channel 12 or the block 25, and the mails slide out of the detection channel 12 on the right.
The overweight mail entering the buffer cavity 44 through the first mail outlet 45 slides down on the upper end surface of the article placing table 50, the third spring 52 cannot bear the weight of the overweight mail to enable the lifting block 47 to slide down, and then when the lifting block 47 slides down to the lower limit position, the fixing rod 54 penetrates through the insertion hole 53 to abut against the front end of the lower end surface of the article placing table 50, so that the article placing table 50 tilts backwards, and the overweight mail slides out of the buffer cavity 44 from the upper end surface of the article placing table 50.
The invention has the beneficial effects that: the invention can effectively and quickly detect whether the mails meet the weight standard, screens the mails which do not meet the weight standard, avoids the condition of inaccurate detection result caused by the fact that a plurality of mails enter the detection at the same time during the detection, obviously reduces the error caused by manual detection, improves the working efficiency and reduces the labor intensity.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (6)
1. The utility model provides an overweight sorting machine of mail, includes the organism, what link up about the organism is equipped with the test passage, the test passage downside is equipped with carries detection device, its characterized in that: the conveying detection device comprises three transmission cavities which are communicated with the lower wall of the detection channel and have leftward openings, a first rotating shaft is rotatably arranged between the front wall and the rear wall of the transmission cavities at the left-right symmetrical positions, a belt wheel is fixedly arranged in each transmission cavity by the first rotating shaft, a conveying belt is wound between the belt wheels at the left side and the right side, the upper end surface of the conveying belt is lower than the lower wall of the detection channel, ejector rod cavities are uniformly distributed on the upper end surface and the lower end surface of the conveying belt, ejector rods with one ends capable of extending to the outside are arranged in the ejector rod cavities in a vertically sliding manner, first springs are fixedly connected between the ejector rods and the inner walls of the ejector rod cavities, rubber blocks are fixedly arranged at the ends of the ejector rods extending to the outside, when the ejector rods are positioned above the detection channel, the upper ends of the ejector rods can extend into the, the jacking device comprises a blocking block fixedly arranged on the lower wall of the detection channel, when the mail is overweight, the first spring cannot bear the weight of the mail, the ejector rod above the mail is pressed downwards to slide, the lower end face of the mail is in contact with the lower wall of the detection channel and is blocked by the blocking block, a buffer device is arranged on the rear side of the detection channel and comprises a third fixed shaft arranged in the rear wall of the detection channel, a first mail outlet is communicated between the buffer cavity and the detection channel and on the left side of the blocking block, and the blocked overweight mail enters the buffer cavity through the first mail outlet.
2. A mail superheavy sorter as claimed in claim 1 wherein: carry detection device to include organism left end face longitudinal symmetry and fixed backup pad that is equipped with, equipartition and fixed being equipped with the first fixed axle of a line between the backup pad, rotatable first cylinder that is equipped with on the first fixed axle, first cylinder up end is less than detect the passageway lower wall, left rearmounted in the transmission chamber back wall and in the fixed first motor that is equipped with in rear side of first pivot, left be first pivot rear end power connect in first motor, detect passageway lower wall right-hand member intercommunication and be equipped with the cylinder chamber, rotatable second fixed axle that is equipped with between the back wall before the cylinder chamber, fixed being equipped with on the second fixed axle upper end extends to slightly second cylinder in the detect the passageway.
3. A mail superheavy sorter as claimed in claim 1 wherein: the jacking device is located including the intercommunication the test passage lower wall just in the chamber of accomodating of both sides around the transmission chamber, it is located to accomodate the chamber the left side of block piece, accomodate chamber lower wall gliding from top to bottom and be equipped with the slide bar, slide bar upper end with accomodate the intracavity and fix and be equipped with the fixed block, be equipped with the ascending roller groove of opening on the fixed block, rotatable third fixed axle that is equipped with between the wall about the roller groove, the fixed upper end that is equipped with stretches out on the third fixed axle the third cylinder in roller groove.
4. A mail superheavy sorter as claimed in claim 3 wherein: in the detection channel lower wall and in the downside of slide bar is equipped with the cam chamber, rotatable second pivot that is equipped with between the wall around the cam chamber, in the cam chamber antetheca and in the fixed second motor that is equipped with in front side of second pivot, second pivot front end power connect in the second motor, in the second pivot and in the below of slide bar is from fixed first cam, second cam, third cam and the fourth cam that is equipped with in proper order to the front, first cam the second cam the third cam with the protrusion end radius of fourth cam increases in proper order.
5. A mail superheavy sorter as claimed in claim 3 wherein: the slide bar lower extreme extends to just be equipped with the decurrent gyro wheel groove of opening in the cam chamber, rotatable lower extreme that is equipped with stretches out between the front and back wall of gyro wheel groove the gyro wheel in gyro wheel groove, it is equipped with spacing chamber in the chamber lower wall to accomodate, the slide bar runs through spacing chamber, the gliding stopper that is equipped with from top to bottom in the spacing chamber, the stopper with fixedly connected with fourth spring between the spacing intracavity wall under the effect of fourth spring, the gyro wheel all the time with the below first cam the second cam the third cam with the fourth cam offsets.
6. A mail superheavy sorter as claimed in claim 1 wherein: the buffer device comprises a second workpiece outlet which is communicated with the lower end of the rear wall of the buffer cavity and has a backward opening, the buffer cavity is internally provided with a lifting block which can slide up and down, the front and back symmetrical positions of the upper end surface of the lifting block are fixedly provided with supporting blocks, a connecting block is rotatably arranged between the supporting blocks, a placing table is fixedly arranged at the upper end of the connecting block, two second springs are fixedly arranged at the left-right symmetrical positions between the object placing table and the lifting block, a third spring is fixedly connected between the lifting block and the lower wall of the buffer cavity, the front end of the lifting block is provided with a jack which is communicated up and down, the lower wall of the buffer cavity and the lower side of the jack are fixedly provided with a fixed rod, when the lifting block slides downwards to the lower limit position, the fixed rod penetrates through the jack and abuts against the front end of the lower end face of the object placing table, and the article placing table is inclined backwards, and overweight mails slide out of the buffer cavity from the upper end surface of the article placing table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010131989.5A CN111167729A (en) | 2020-02-29 | 2020-02-29 | Overweight sorting machine of mail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010131989.5A CN111167729A (en) | 2020-02-29 | 2020-02-29 | Overweight sorting machine of mail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111167729A true CN111167729A (en) | 2020-05-19 |
Family
ID=70620831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010131989.5A Withdrawn CN111167729A (en) | 2020-02-29 | 2020-02-29 | Overweight sorting machine of mail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111167729A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659622A (en) * | 2020-06-15 | 2020-09-15 | 缙云县云淡包装有限公司 | Express delivery letter sorting conveyor |
-
2020
- 2020-02-29 CN CN202010131989.5A patent/CN111167729A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111659622A (en) * | 2020-06-15 | 2020-09-15 | 缙云县云淡包装有限公司 | Express delivery letter sorting conveyor |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200519 |
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| WW01 | Invention patent application withdrawn after publication |