CN113734759A - Feeding mechanism and production line - Google Patents
Feeding mechanism and production line Download PDFInfo
- Publication number
- CN113734759A CN113734759A CN202111046563.0A CN202111046563A CN113734759A CN 113734759 A CN113734759 A CN 113734759A CN 202111046563 A CN202111046563 A CN 202111046563A CN 113734759 A CN113734759 A CN 113734759A
- Authority
- CN
- China
- Prior art keywords
- hand
- magazine
- cylinder
- handing
- over
- 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.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Specific Conveyance Elements (AREA)
Abstract
A feed mechanism, comprising: a magazine into which a plurality of materials required for production are loaded, the materials being present in a stacked state in the magazine; the pair of bearing cylinders are respectively positioned at two sides of the magazine and at a discharge port at the bottom of the magazine, and are provided with bearing hand grippers; the delivery cylinder is positioned below the magazine material outlet; work as when the handing-over cylinder goes upward, the handing-over station mould of handing-over cylinder head with the contact is grabbed to bearing cylinder's hand, at this moment, the bearing cylinder is opened, is located a material of magazine bottom falls into in the handing-over station mould of handing-over cylinder, the handing-over cylinder is down, the bearing cylinder is closed, the handing-over station mould is shifted to the circulation of production line, waits for next process to handle.
Description
Technical Field
The invention belongs to the field of intelligent manufacturing, and particularly relates to a feeding mechanism and a production line adopting the feeding mechanism.
Background
In the production process of the elevator, the manufacturing of the elevator rotor is one of the important components in the production link of the elevator. Among them, the common magnetic pasting operation in the manufacturing process of the elevator rotor is mostly carried out by manpower. In the whole production process, because the magnet is frequently subjected to feeding operation, the production speed is easily influenced by the working state of an individual. And long-time mechanical labor is easy to cause mental and physical fatigue, and the probability of human errors is increased.
Disclosure of Invention
In one embodiment of the present invention, a feeding mechanism includes,
a magazine into which a plurality of magnets required for producing an elevator rotor are loaded, the magnets being present in a stacked state in the magazine;
the pair of bearing cylinders are respectively positioned at two sides of the magazine and at a discharge port at the bottom of the magazine, bearing hand claws are arranged on the bearing cylinders, and when the bearing cylinders are closed, the pair of bearing hand claws seal the magnets in the magazine;
the connecting cylinder is positioned below the magnet outlet of the magazine;
when the hand-held joint cylinder moves upwards, the hand-held joint station mold at the head of the joint cylinder is in contact with the hand-held handle of the bearing cylinder, at the moment, the bearing cylinder is opened, a magnet positioned at the bottom of the magazine falls into the joint station mold of the joint cylinder,
the handing-over cylinder descends, the bearing cylinder closes, handing-over station mould is shifted to the circulation position of production line, waits for next process to handle.
The feeding mechanism also comprises a positioning cylinder which is positioned at one side of the connecting cylinder,
after the handover cylinder moves upwards, the positioning cylinder moves upwards along with the handover cylinder until the positioning pin of the positioning cylinder keeps a distance of a magnet height with the lower bottom surface of the handover station die,
when handing-over cylinder is down, because the effect of locating pin, handing-over station mould descend a magnetite height, the position of magnetite decline in the magazine, the hand of bearing cylinder is grabbed and is just in time sealed magazine bottom magnetite export.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 is a front view of a feed mechanism according to one embodiment of the present invention.
Figure 2 is a side view of a feed mechanism (hold cylinder open) according to one of the embodiments of the present invention.
Figure 3 is a side view of a feed mechanism (hold cylinder off) according to one embodiment of the present invention.
1-a magazine, 10-a magnet, 11-a spring clip,
2-a connecting cylinder, 21-a connecting station mould,
3-supporting cylinder, 31-hand grasping,
4-positioning the cylinder,
5-servo motor.
Detailed Description
In order to solve the problem that the existing magnet sticking process of an elevator traction machine in production can only manually stick magnets, the invention provides a set of automatic magnet feeding device, and meanwhile, the device also has certain universality and can be used for other similar feeding occasions through simple modification.
According to one or more embodiments, as shown in fig. 1 and 2. A magnet feeding mechanism capable of quickly filling and supplementing materials is used for stacking and filling magnets needing to be attached with magnets into a designed magazine according to a feeding and supplementing method of stacked products such as magnets, and the corresponding magazine filling can be selected according to different product models. As shown in fig. 1 by way of example for four magazines, the feed mechanism comprises:
the magazine loading stations of four stations are provided, each station is provided with a set of magazine, the interior of the magazine can adapt to magnets with different lengths through a dismounting part, and the number of stations can be increased or decreased according to actual field requirements;
two sets of magnet bearing cylinders are symmetrically arranged at the bottommost end of each station, and the total number of the magnet bearing cylinders is four groups and eight groups. The number and the weight of the magnets required by the largest rotor are calculated to select an applicable bearing cylinder, a bearing hand claw and a reverse arc design are designed on the bearing cylinder to be attached to the curved surface of the magnets, the magnets falling into the cross-connecting platform die are not damaged, and the effect similar to a gate is achieved;
a set of magnet connecting platform driven by a servo motor is provided with two stations to adapt to magnets with different widths; each station is provided with a set of cross-connecting cylinder and a set of positioning cylinder, and is also provided with a mold with corresponding magnet width. Selecting an applicable handover cylinder by adding the number and weight of magnets needed by the largest rotor and slight falling gravity impact during handover; the cross-over air cylinder can be flexibly configured according to different product types; each group of the connecting cylinders is provided with a corresponding positioning cylinder to adjust the position of the connecting cylinder during connecting so as to reduce the slight falling gravity generated during connecting;
all cylinders are equipped with magnetic switches to detect the actual position, and fiber optic correlation sensors are mounted under the magazine and on both sides of the mold to detect the presence of magnets.
The magnet connecting platform moves below the magazine station, and can be accurately positioned right below each magazine through a servo motor, so that the connecting mold and the magnets are completely aligned to reduce the falling impact of the magnets as much as possible; by PLC control location cylinder, handing-over cylinder and bearing cylinder switch chronogenesis during handing-over, bearing cylinder stroke is adjustable, guarantees that the action at every turn drops a magnetite, and similar bullet goes up the thorax.
The flow of the automatic feeding mechanism for realizing automatic feeding and supplying is as follows:
1. manually filling the magazine with magnets;
2. manually placing the loaded magazine into a station;
3. manually pressing a station button needing to be put into production on the workbench, wherein stations can be increased or decreased according to user requirements;
4. and starting the whole equipment on the control panel, and putting into production.
The whole operation flow is very simple, and the operation can be completed only by manually feeding, selecting a station and pressing a system starting button.
The time interval of magnet discharging is about 30 seconds each time, and as long as the speed of the subsequent process can be kept up, a large optimization space is provided. The whole process can finish the magnet pasting of at least one rotor only by one-time feeding without manual intervention as long as the whole process operates, and the magnet pasting of each time needs manual unpacking and manual taking unlike the previous manual work station.
The invention uses PLC as the core of the control system to control the operation of the whole set of device, and uses the combination of a touch screen, a button and an indicator light as the interface of man-machine interaction. The main control objects are various electromagnetic valves, hand grips and servomechanisms.
The embodiment of the invention has the advantages that the automatic mechanical device is used for replacing the mechanical labor which is originally completed by manual work), the error rate is reduced, the productivity is improved, and the hands of workers are liberated, so that the workers can have time to complete more detailed work and more benefit-producing work.
According to one or more embodiments, as shown in fig. 1, the fast feed replenishing apparatus includes: 4 magazine stations, wherein the bottom of each magazine station is provided with 1 pair of optical fiber sensors for detecting whether the magnets in the magazine are used up; each magazine station is symmetrically provided with two sets of receiving cylinders and hand grips thereof, the 4 stations are 8 sets in total and play a role of a magazine outlet gate, and the cylinders are provided with magnetic switches for detecting the hand grip positions; 4 sets of magazine, all by aluminum alloy preparation stereoplasm surface treatment, the firm light in weight of texture openly has the slip apron to conveniently open the material loading, and the magazine bottom is furnished with the spring jack catch, and the spring jack catch presss from both sides tightly can not the magnetite that drops in the material loading, and when inserting the magazine station, magazine station both sides mechanism can strut the spring clamp and make the magnetite drop on bearing cylinder holds in the palm.
1 handing-over platform installs 2 handing-over stations on the handing-over platform, is furnished with the mould of POM material, adapts to the magnetite of two kinds of different widths. Each transfer station is provided with 1 pair of opposite optical fiber sensors for detecting whether the magnet falls into the mold. Every handing-over station all is equipped with 1 set of handing-over cylinder and 1 set of location cylinder, installs 2 magnetic switch detection position on every cylinder. The magnet is accepted in handing-over cylinder and the action of location cylinder together, and the adjustable assurance of location cylinder stroke moves a magnet that drops at every turn.
1 set of servo drive mechanism, including servo motor, servo amplifier and drive lead screw, the main function is the drive handing-over platform, makes it at 4 stations and handing-over position accurate positioning. The servo system records 10 positions in total, and each station of the 4 stations has the positions of 2 handover stations, so that the number of the stations is 8 in total; the flow indexing of the last and next process is also provided with the positions of the two hand-over stations, so that there are a total of 10 positions. The coordinates of the 10 positions, the speed, the acceleration and other parameters of the motor are preset in the program in advance, and manual adjustment is completely not needed.
1 set of electromagnetic valve island for controlling all cylinders;
1 PLC controller for controlling automatic feeding process;
and 1 touch screen as a man-machine interface.
The specific work flow is as follows:
1) after the magazine is inserted into the magazine station after the feeding, the button with the lamp of the corresponding station begins to flash, and at the moment, the button is pressed, the indicator lamp is normally on, the station is selected, a plurality of stations can be selected at the same time, and the system can take the stations in sequence;
2) pressing a start button to start the system;
3) the transfer platform moves to the position below the selected station;
4) the transfer cylinder ascends, a groove is dug in a transfer station die to be matched with a support cylinder to be embedded by a hand grab, so that a die working surface and a hand grab support surface are positioned on the same plane, the PLC detects whether the magnetic switch is in place or not, and the PLC detects a signal to perform the next operation;
5) the positioning cylinder rises, and the thickness of a magnet is reserved on the positioning pin of the positioning cylinder and the lower bottom surface of the handover station;
6) the bearing cylinder is opened, and the magazine magnetite is whole to fall into the handing-over station, because handing-over station and bearing are held in hand and are lain in the coplanar almost, so do not have the impact basically. The cross-connecting station correlation optical fiber detects whether the magnet is in place;
7) the joint cylinder descends, the joint station can only descend by the thickness of one magnet due to the limitation of the positioning pin of the positioning cylinder, and the magnets in the whole magazine descend by the body position of one magnet in sequence;
8) closing the bearing cylinder;
9) the positioning cylinder and the connecting cylinder descend simultaneously and withdraw from the working surface to prevent interference;
10) after all the magnetic switches of the handover station are detected to be in the original positions, the servo motor works to move the handover station to the flow transposition position to wait for the next process;
11) after the correlation optical fiber detects that the magnet is taken away in the next process, repeating the action of 3-10 to continue feeding the magnet;
12) when all the magnets of the magazine at one station are taken out, the station is automatically deselected, and the indicator light flickers; the handing-over platform automatically move and select the magnetite to the next station of selecting.
The device has high precision requirement, and the smooth falling of the magnet can be ensured only by controlling the machining tolerance and the assembly tolerance within the design range without turning and blocking; the cooperation of handing-over station and bearing cylinder also just has just, otherwise arouses very easily to interfere, influences subsequent action. The supporting cylinder needs to be leveled to a very accurate position when the gripper is held by the hand, and the working surface in contact with the magnet needs to be subjected to fine surface treatment, so that the surface of the magnet is not damaged when the gripper is closed.
The feeding mechanism provided by the invention can complete the whole set of flow of feeding and supplying the magnetic sheets on the premise of operation of a single worker, and can realize one-time filling, automatic feeding and subsequent processes to form automatic production without repeating mechanical feeding actions every time. Thus, the yield is improved, and the production process is simplified.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. A feeding mechanism is characterized by comprising,
a magazine into which a plurality of materials required for production are loaded, the materials being present in a stacked state in the magazine;
the pair of bearing cylinders are respectively positioned at two sides of the magazine and at a discharge port at the bottom of the magazine, and are provided with bearing hand grippers;
the delivery cylinder is positioned below the magazine material outlet;
when the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-contacting contact of the hand-grasping contact of the hand-contacting contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-grasping contact of the hand-,
the handing-over cylinder descends, the bearing cylinder closes, handing-over station mould is shifted to the circulation position of production line, waits for next process to handle.
2. The loading mechanism of claim 1, further comprising a positioning cylinder located on one side of said interface cylinder,
after the handing-over cylinder goes upward, the positioning cylinder also goes upward until the positioning pin of the positioning cylinder keeps a material height distance with the lower bottom surface of the handing-over station die,
when the handing-over cylinder is down, because the effect of locating pin, handing-over station mould descends the material height, and the position of material decline in the magazine, the hand of bearing cylinder is grabbed and is just in time sealed magazine bottom material export.
3. A feed mechanism according to claim 1 or 2, wherein the bottom of the magazine is provided with spring clips which grip when material is filled into the magazine, preventing the material from falling out,
when the magazine is inserted into the magazine station of the feeding mechanism, the spring clip is spread, so that the material in the magazine falls on the hand grip of the bearing cylinder.
4. A loading mechanism according to claim 3, wherein the loading mechanism comprises a PLC, and the PLC controls the actions, timing and stroke of the cross-over cylinder, the take-over cylinder and the positioning cylinder.
5. The loading mechanism as claimed in claim 4, wherein a magnetic switch is provided on the hand-over station mold, and is detected by the PLC to determine whether the hand-over station mold is in place.
6. A loading mechanism according to claim 4, wherein said loading structure is provided with a fibre optic correlation sensor for detecting whether said material falling from the magazine is in place.
7. The loading mechanism of claim 1, wherein the material is magnetite and is used in the production of elevator rotors.
8. An elevator rotor production line, characterized in that it comprises one or more feed mechanisms according to claim 4 or 5.
9. The elevator rotor production line of claim 8, wherein the hand-off station mold is transferred to a flow station of the production line by a servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046563.0A CN113734759A (en) | 2021-09-06 | 2021-09-06 | Feeding mechanism and production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111046563.0A CN113734759A (en) | 2021-09-06 | 2021-09-06 | Feeding mechanism and production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113734759A true CN113734759A (en) | 2021-12-03 |
Family
ID=78736765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111046563.0A Pending CN113734759A (en) | 2021-09-06 | 2021-09-06 | Feeding mechanism and production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113734759A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274439A (en) * | 2022-03-07 | 2022-04-05 | 成都航利航空科技有限责任公司 | Rubber product three-dimensional layout production framework based on intelligent unit and production method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4339596A (en) * | 1995-06-05 | 1996-12-19 | Mcneall Industrial Technologies Pty Limited | Automatic pallet dispenser clamping system |
| CN101397084A (en) * | 2008-09-26 | 2009-04-01 | 云南昆船设计研究院 | Tobacco carton single piece distribution apparatus |
| CN101497396A (en) * | 2008-02-01 | 2009-08-05 | 贵阳普天物流技术股份有限公司 | Method and device for automatically sorting regular objects according to request of order |
| CN105438841A (en) * | 2015-12-26 | 2016-03-30 | 中国电子科技集团公司第十三研究所 | Universal type automatic loading and unloading system of bottom tool separation method based on conveyor belt |
| CN208150522U (en) * | 2018-04-18 | 2018-11-27 | 许昌烟草机械有限责任公司 | A kind of cigarette carton sorting mechanism |
| CN213170076U (en) * | 2020-08-19 | 2021-05-11 | 深圳市合元科技有限公司 | Tray storage and distribution mechanism and tray conveying device |
-
2021
- 2021-09-06 CN CN202111046563.0A patent/CN113734759A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4339596A (en) * | 1995-06-05 | 1996-12-19 | Mcneall Industrial Technologies Pty Limited | Automatic pallet dispenser clamping system |
| CN101497396A (en) * | 2008-02-01 | 2009-08-05 | 贵阳普天物流技术股份有限公司 | Method and device for automatically sorting regular objects according to request of order |
| CN101397084A (en) * | 2008-09-26 | 2009-04-01 | 云南昆船设计研究院 | Tobacco carton single piece distribution apparatus |
| CN105438841A (en) * | 2015-12-26 | 2016-03-30 | 中国电子科技集团公司第十三研究所 | Universal type automatic loading and unloading system of bottom tool separation method based on conveyor belt |
| CN208150522U (en) * | 2018-04-18 | 2018-11-27 | 许昌烟草机械有限责任公司 | A kind of cigarette carton sorting mechanism |
| CN213170076U (en) * | 2020-08-19 | 2021-05-11 | 深圳市合元科技有限公司 | Tray storage and distribution mechanism and tray conveying device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274439A (en) * | 2022-03-07 | 2022-04-05 | 成都航利航空科技有限责任公司 | Rubber product three-dimensional layout production framework based on intelligent unit and production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107283166B (en) | Automatic assembly line for fuel pumps and operation method of automatic assembly line | |
| CN105643248B (en) | Cylinder cover feeding and press-in device | |
| CN110801995B (en) | Automatic change point gum machine | |
| ITTO950999A1 (en) | PROCEDURE AND DEVICE FOR THE AUTOMATIC LOADING AND UNLOADING OF PIECES OF SHEET. | |
| CN112792550B (en) | Magnet assembling machine and assembling method | |
| CN110587302A (en) | Automatic assembly production line for automotive air conditioning compressor movable fixed plate | |
| CN113734759A (en) | Feeding mechanism and production line | |
| CN211222178U (en) | Graphite bipolar plate compression molding system | |
| CN107470899B (en) | Right end assembly machine of automatic assembly line of fuel pump and operation method of right end assembly machine | |
| CN108689785A (en) | A kind of automatic card inserting mouth plug device | |
| CN116855891B (en) | Full-automatic film plating umbrella feeding and discharging machine and umbrella feeding and discharging process | |
| CN211438907U (en) | Automatic assembly production line for automotive air conditioning compressor movable fixed plate | |
| CN217839418U (en) | Receive socks device | |
| CN217839419U (en) | Sock wearing plate device | |
| US3977539A (en) | Arrangement for inserting parts to be machined in a clamping frame | |
| CN111320360A (en) | Automatic feeding and discharging device for hot press molding of optical lenses | |
| CN217190994U (en) | Film-pasted glass sheet detection marking equipment | |
| CN114714758B (en) | Automatic silk screen printing detection and overturning equipment for negative electrode plate of PTC heater | |
| CN216862882U (en) | Feeding and discharging system for chemical fiber silk thread sample detection | |
| CN216029109U (en) | Quick kludge of oil cup subassembly | |
| CN114261750B (en) | Feeding and sheet taking equipment | |
| CN214566460U (en) | Automatic box equipment of going into of filament flitch | |
| CN111822978B (en) | Capillary assembling machine | |
| CN209439330U (en) | The sheet stock seperator of rotary machine hand continuous punching automatic production line | |
| CN208843209U (en) | Automate feeding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211203 |