CN112122089A - Filter equipment is used in rapeseed oil production - Google Patents
Filter equipment is used in rapeseed oil production Download PDFInfo
- Publication number
- CN112122089A CN112122089A CN202010915334.7A CN202010915334A CN112122089A CN 112122089 A CN112122089 A CN 112122089A CN 202010915334 A CN202010915334 A CN 202010915334A CN 112122089 A CN112122089 A CN 112122089A
- Authority
- CN
- China
- Prior art keywords
- wall
- box body
- box
- screen
- groove
- Prior art date
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/04—Stationary flat screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/02—Pretreatment
- C11B1/04—Pretreatment of vegetable raw material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a filtering device for rapeseed oil production, which comprises a bottom plate, wherein a box body is welded on the outer wall of the top of the bottom plate, an air inlet groove is formed in the top of the outer wall of one side of the box body, a dust screen and a dust removal fan are arranged on the inner wall of the air inlet groove, an air outlet groove is formed in the side, away from the air inlet groove, of the box body, an air exhaust fan is arranged on the inner wall of the air outlet groove, a screen mesh which is in sliding connection with the inner wall of the box body is arranged below the air outlet groove, the outer wall of the box body below the screen mesh is connected with a rotating motor through bolts, an output shaft. According to the invention, the scrap impurities in the rapeseed are removed by the dust removing fan and the exhaust fan, the large-particle impurities are screened out by the screen, the rapeseed is stirred by the rotating blade, so that the rapeseed is washed by water flow, the cleaning efficiency is higher, the drying box is heated by the hot air blower, and the rapeseed is stirred by the stirring shaft, so that the moisture is dried more uniformly.
Description
Technical Field
The invention relates to the technical field of rapeseed oil production, in particular to a filtering device for rapeseed oil production.
Background
Rapeseed oil is commonly called rape oil, also called coriander oil, and is transparent or semitransparent liquid obtained by squeezing seeds of cruciferous brassica (namely rape), the rapeseed oil is golden yellow or brownish yellow in color and has certain pungent smell, which is called green smell by folk, the gas is caused by a certain amount of sinapine contained in the rapeseed oil, but the rapeseed oil of an excellent variety does not contain the substance, such as high oleic acid rapeseed oil, double low rapeseed oil and the like, the dust in the rapeseed cannot be well removed when the conventional rapeseed oil production filtering device carries out rapeseed cleaning work, only the impurities such as sawdust mixed with the rapeseed and the like can be simply removed, and the dust attached to the surface of the rapeseed cannot be effectively removed, so that the quality and the quality of the rapeseed oil are influenced.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a filtering device for rapeseed oil production.
The invention provides a filtering device for producing rapeseed oil, which comprises a bottom plate, wherein a box body is welded on the outer wall of the top of the bottom plate, an air inlet groove is formed in the top of the outer wall of one side of the box body, a dust screen and a dust removing fan are arranged on the inner wall of the air inlet groove, an air outlet groove is formed in one side of the box body, away from the air inlet groove, and is provided with an air extracting fan, a screen which is in sliding connection with the inner wall of the box body is arranged below the air outlet groove, the outer wall of the box body below the screen is connected with a rotating motor through bolts, an output shaft of the rotating motor is connected with a rotating shaft through a coupler, rotating blades which are distributed at equal intervals are arranged on the outer wall of the rotating shaft, a conical plate which is welded with the inner wall of the box body is arranged below the rotating blades, an inserting groove is, the filter screen is obliquely arranged, a connecting hole is formed in one side of the box body, which is lower than the horizontal position of the filter screen, and is connected with a discharge chute, the tail end of the discharge chute is connected with a drying box, the outer wall of the drying box is connected with a stirring motor through a bolt, and the output shaft of the stirring motor is connected with a stirring shaft, the outer wall of the stirring shaft is provided with stirring blades which are distributed at equal intervals, the outer wall of one side of the drying box far away from the stirring motor is provided with an air heater, and the hot air blower runs through the air outlet pipe on the outer wall of the drying box, the top of the box body is provided with a feed inlet, the bottom of the box body is provided with a drain pipe, the drain pipe is provided with a control valve, the center position of the bottom of the drying box is provided with a discharge chute, and the inner wall of the discharge chute is connected with a discharge plate in a sliding way, the outer wall of the box body at one side far away from the rotating motor is provided with a water inlet, and the water inlet is positioned below the screen mesh, and the outer wall of the top of the drying box is provided with radiating holes distributed at equal intervals.
Preferably, the box inner wall is opened there is the spout, and the spout sets up along screen cloth slip direction, and spout length is the same with screen cloth length.
Preferably, the outer wall of screen cloth both sides all welds there is the slider, and slider along spout inner wall sliding connection, slider length is less than the spout degree of depth.
Preferably, the outer wall of the bottom plate is welded with supporting legs all around, and universal wheels are arranged at the bottoms of the supporting legs.
Preferably, the bottom plate is close to the supporting leg outer wall welding of stoving case one side and places the board, and places the collecting vessel on the board, and the collecting vessel is located the blown down tank below.
Preferably, the outer wall of the box body is provided with a cleaning window, one side of the cleaning window is hinged with the outer wall of the box body, and the other side of the cleaning window is provided with a locking pin.
Preferably, the box and the outer wall of the drying box are both provided with observation windows, and the observation windows of the box are positioned below the cleaning windows.
1. According to the invention, the dust removing fan and the exhaust fan act together to generate opposite air flow, impurities such as sawdust and the like in the rapeseed added from the feeding hole are removed, then the rapeseed is screened by the screen, large-particle impurities in the rapeseed are screened out, the rapeseed is filtered for the first time, then water is injected into the box body through the water inlet, the rotating motor drives the rotating shaft to drive the rotating blades to stir the rapeseed, so that the water flow washes the rapeseed, compared with a traditional device, the dust and impurities on the surface of the rapeseed can be better removed, and the cleaning efficiency is higher;
2. observe the rape seed through the observation window and wash the condition, wash the completion back, the pulling baffle is put out rape seed and water, and the filter screen of baffle below filters the rape seed, and the rape seed slides into the stoving case through the filter screen that the slope set up, and the sewage after the washing passes through the drain pipe discharge of bottom half, and the air heater heats the stoving case, and the (mixing) shaft stirs the rape seed, makes moisture stoving more even.
Drawings
FIG. 1 is a schematic cross-sectional structure diagram of a filtering device for rapeseed oil production according to the present invention;
FIG. 2 is a schematic front structural view of a filter device for rapeseed oil production according to the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a drying box of the filtering device for rapeseed oil production according to the present invention.
In the figure: 1 bottom plate, 2 boxes, 3 dust screens, 4 dust removal fans, 5 exhaust fans, 6 screens, 7 rotating motors, 8 rotating shafts, 9 rotating blades, 10 conical plates, 11 clapboards, 12 filter screens, 13 drying boxes, 14 stirring motors, 15 stirring shafts, 16 stirring blades and 17 air heaters.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1, referring to fig. 1 to 3, a filter device for rapeseed oil production comprises a bottom plate 1, a box body 2 welded on the outer wall of the top of the bottom plate 1, an air inlet groove arranged on the top of the outer wall of one side of the box body 2, a dust screen 3 and a dust removing fan 4 arranged on the inner wall of the air inlet groove, an air outlet groove arranged on the side of the box body 2 away from the air inlet groove, a suction fan 5 arranged on the inner wall of the air outlet groove, a screen 6 slidably connected with the inner wall of the box body 2 arranged below the air outlet groove, a dust removing fan 4 and the suction fan 5 acting together to generate an opposite air flow to remove impurities such as sawdust and debris in rapeseed fed from a feed inlet, the dust screen 4 preventing external dust from entering the inside of the box body 2, the screen 6 screening the rapeseed to remove large-particle impurities in the rapeseed and filter the rapeseed for the first time, a chute arranged on the, the length of the sliding groove is the same as that of the screen 6, the sliding blocks are welded on the outer walls of two sides of the screen 6 and are connected with each other in a sliding mode along the inner wall of the sliding groove, the length of each sliding block is smaller than the depth of the sliding groove, the outer wall of the box body 2 below the screen 6 is connected with the rotating motor 7 through bolts, the output shaft of the rotating motor 7 is connected with the rotating shaft 8 through the coupler, the outer wall of the rotating shaft 8 is provided with rotating blades 9 distributed equidistantly, a conical plate 10 welded with the inner wall of the box body 2 is arranged below the rotating blades 9, the rotating motor 7 drives the rotating shaft 8 to drive the rotating blades 9 to stir the rapeseeds, so that water flow washes the rapeseeds, compared with a traditional device, dust and impurities on the surfaces of the rapeseeds can be better removed, the cleaning efficiency is higher, the outer wall of the box, a filter screen 12 welded with the inner wall of the box body 2 is arranged below the partition plate 11, the filter screen 12 is obliquely arranged, a connecting hole is formed in the lower side of the horizontal position of the filter screen 12 of the box body 2 and is connected with a discharge chute, the tail end of the discharge chute is connected with a drying box 13, the outer wall of the drying box 13 is connected with a stirring motor 14 through a bolt, an output shaft of the stirring motor 14 is connected with a stirring shaft 15, stirring blades 16 distributed at equal intervals are arranged on the outer wall of the stirring shaft 15, the stirring motor 14 drives the stirring shaft 15 to rotate so as to drive the stirring blades 16 to stir the vegetable seeds, so that the moisture is dried more uniformly, a hot air blower 17 is arranged on the outer wall of one side of the drying box 13 far away from the stirring motor 14, the hot air blower 17 penetrates through an air outlet pipe on the, drying box 13 bottom central point puts and is provided with the blown down tank, and blown down tank inner wall sliding connection has a flitch, box 2 is being kept away from 7 one side outer walls of rotating electrical machines and is being provided with the water inlet, and the water inlet is located screen cloth 6 below, drying box 13 top outer wall is provided with the louvre that the equidistance distributes, 1 bottom outer wall of bottom plate all welds all around has the supporting leg, and is provided with the universal wheel bottom the supporting leg, the board is placed in the welding of the supporting leg outer wall that bottom plate 1 is close to drying box 13 one side, and places and place the collecting vessel on the board, and the collecting vessel is located the blown down tank below, 2 outer walls of box are provided with the clearance window, and clearance window one side is articulated with 2 outer walls of box, and the other one side of clearance window is provided with the stop pin, box 2.
The working principle is as follows: when the invention works, the dust removing fan 4 and the exhaust fan 5 are started firstly, then the vegetable seeds are added into the box body 2 through the feeding hole, the dust removing fan 4 and the exhaust fan 5 act together to generate opposite air flow, the impurities such as sawdust and the like in the vegetable seeds added at the feeding hole are removed, the dustproof net 4 prevents external dust from entering the box body 2, then the screen 6 screens the vegetable seeds to remove large-particle impurities in the vegetable seeds, the vegetable seeds are filtered by the screen 6 for the first time, the vegetable seeds fall above the conical plate 10, then water is injected into the box body 2 through the water inlet, the rotary motor 7 is started, the rotary motor 7 drives the rotary shaft 8 to drive the rotary blades 9 to stir the vegetable seeds, so that the water flow washes the vegetable seeds, compared with the traditional device, the dust and impurities on the surface of the vegetable seeds can be removed better, the cleaning efficiency is higher, the cleaning condition of the vegetable seeds is observed through the observation window, after the cleaning, the pulling baffle 11 emits vegetable seeds and water, the filter screen 12 below the baffle 11 filters the vegetable seeds, the vegetable seeds slide into the drying box 13 through the filter screen 12 which is obliquely arranged, the cleaned sewage is discharged through the drain pipe at the bottom of the box body 2, the hot air blower 17 is started, the hot air blower 17 heats the drying box 13, the stirring motor 14 is started, and the stirring shaft 15 is driven by the stirring motor 14 to rotate so as to drive the stirring blade 16 to stir the vegetable seeds, so that the moisture drying is more uniform.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A filtering device for rapeseed oil production comprises a bottom plate (1), wherein a box body (2) is welded on the outer wall of the top of the bottom plate (1), and is characterized in that an air inlet groove is formed in the top of the outer wall of one side of the box body (2), a dust screen (3) and a dust removal fan (4) are arranged on the inner wall of the air inlet groove, an air outlet groove is formed in one side, away from the air inlet groove, of the box body (2), an air suction fan (5) is arranged on the inner wall of the air outlet groove, a screen (6) which is in sliding connection with the inner wall of the box body (2) is arranged below the air outlet groove, a rotating motor (7) is connected on the outer wall of the box body (2) below the screen (6) through bolts, an output shaft of the rotating motor (7) is connected with a rotating shaft (8) through a coupler, rotating blades (9) which, the outer wall of the box body (2) is provided with a slot, the slot is connected with a partition plate (11) in a sliding manner, a groove is formed in the middle of the conical plate (10), the groove participates in the matching of the partition plate, a filter screen (12) welded with the inner wall of the box body (2) is arranged below the partition plate (11), the filter screen (12) is obliquely arranged, the box body (2) is provided with a connecting hole at the lower side of the horizontal position of the filter screen (12) and is connected with a discharge chute, the tail end of the discharge chute is connected with a drying box (13), the outer wall of the drying box (13) is connected with a stirring motor (14) through bolts, the output shaft of the stirring motor (14) is connected with a stirring shaft (15), the outer wall of the stirring shaft (15) is provided with stirring blades (16) distributed at equal intervals, the outer wall of one side of the drying box (13) away from the, the utility model discloses a drying box, including box (2), box (13), spout, drying box (7), box (2) top sets up and possess the feed inlet, and box (2) bottom is provided with the drain pipe, and the drain pipe is provided with the control valve, drying box (13) bottom central point puts and is provided with the blown down tank, and blown down tank inner wall sliding connection has a flitch, box (2) are provided with the water inlet keeping away from rotating electrical machines (7) one side outer wall, and the water inlet is located screen cloth (6) below, drying box (13.
2. The filtering device for rapeseed oil production according to claim 1, wherein the inner wall of the box body (2) is provided with a chute, the chute is arranged along the sliding direction of the screen (6), and the length of the chute is the same as that of the screen (6).
3. The filtering device for rapeseed oil production according to claim 1, wherein the sliding blocks are welded on the outer walls of the two sides of the screen (6) and connected with the inner wall of the sliding groove in a sliding manner, and the length of each sliding block is smaller than the depth of the sliding groove.
4. The filtering device for rapeseed oil production according to claim 1, wherein the bottom outer wall of the bottom plate (1) is welded with supporting legs all around, and universal wheels are arranged at the bottoms of the supporting legs.
5. The filtering device for rapeseed oil production according to claim 1, wherein a placing plate is welded on the outer wall of the supporting leg of the bottom plate (1) near one side of the drying box (13), and a collecting barrel is placed on the placing plate and is positioned below the discharging groove.
6. The filter device for rapeseed oil production according to claim 1, wherein the outer wall of the box body (2) is provided with a cleaning window, one side of the cleaning window is hinged with the outer wall of the box body (2), and the other side of the cleaning window is provided with a locking pin.
7. The filtering device for rapeseed oil production according to claim 1, wherein the outer walls of the box body (2) and the drying box (13) are provided with observation windows, and the observation window of the box body (2) is positioned below the cleaning window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915334.7A CN112122089A (en) | 2020-09-03 | 2020-09-03 | Filter equipment is used in rapeseed oil production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915334.7A CN112122089A (en) | 2020-09-03 | 2020-09-03 | Filter equipment is used in rapeseed oil production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112122089A true CN112122089A (en) | 2020-12-25 |
Family
ID=73847943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010915334.7A Withdrawn CN112122089A (en) | 2020-09-03 | 2020-09-03 | Filter equipment is used in rapeseed oil production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112122089A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692835A (en) * | 2021-01-11 | 2021-04-23 | 深圳市瑞驰文体发展有限公司 | Billiard robot with automatic billiard cleaning function |
| CN114367343A (en) * | 2021-11-30 | 2022-04-19 | 陇南陇锦园油橄榄开发有限责任公司 | Broken grinder of olive |
| CN114588798A (en) * | 2022-03-02 | 2022-06-07 | 江苏亚克西食品有限公司 | A stirring filter equipment for after tomato ketchup production making beating |
-
2020
- 2020-09-03 CN CN202010915334.7A patent/CN112122089A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692835A (en) * | 2021-01-11 | 2021-04-23 | 深圳市瑞驰文体发展有限公司 | Billiard robot with automatic billiard cleaning function |
| CN112692835B (en) * | 2021-01-11 | 2021-08-03 | 深圳市瑞驰文体发展有限公司 | Billiard robot with automatic billiard cleaning function |
| CN114367343A (en) * | 2021-11-30 | 2022-04-19 | 陇南陇锦园油橄榄开发有限责任公司 | Broken grinder of olive |
| CN114588798A (en) * | 2022-03-02 | 2022-06-07 | 江苏亚克西食品有限公司 | A stirring filter equipment for after tomato ketchup production making beating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112122089A (en) | Filter equipment is used in rapeseed oil production | |
| CN111408575B (en) | Grain processing device | |
| WO2022206056A1 (en) | Negative pressure type low-damage veneer dyeing device | |
| CN111871769A (en) | Clean drying device is used in ecological rice processing | |
| CN112414098A (en) | Corn drying device is used to agricultural | |
| CN115447026B (en) | Device and method for recycling waste plastics | |
| CN113680731B (en) | Traditional Chinese medicinal material cleaning machine and cleaning processing method | |
| CN216522800U (en) | Quick drying device is used in rice processing | |
| CN214528889U (en) | Rapeseed treatment equipment for rapeseed oil | |
| CN214555672U (en) | Energy-efficient circulating washing medicine machine | |
| CN213996131U (en) | Kitchen waste treatment device | |
| CN109909227A (en) | Cleaning equipment is used in a kind of production of glass microballoon | |
| CN214976198U (en) | A edulcoration device for rehmanniae | |
| CN112432454A (en) | Corn drying device is used to agricultural | |
| CN219698963U (en) | Cleaning device for soybean isoflavone extraction separator | |
| CN215879014U (en) | Belt cleaning device is used in wheat starch production | |
| CN206381729U (en) | A kind of coke processing system | |
| CN214767373U (en) | Wheat belt cleaning device for flour processing | |
| CN215427762U (en) | Synthetic crystal washing drying system | |
| CN214962513U (en) | Balanced edible plant blend oil production system of fatty acid | |
| CN214103147U (en) | Surface cleaning device is used in food almond processing | |
| CN218251859U (en) | Flax processing is with raw materials belt cleaning device | |
| CN217164753U (en) | Agricultural fertilizer processing is with broken integration equipment of drying | |
| CN220332061U (en) | Oil press with residue collecting function | |
| CN216631572U (en) | Wall seal stamp-pad ink production facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201225 |
|
| WW01 | Invention patent application withdrawn after publication |