CN113911739A - High-efficiency automatic blanking device for touch screen processing - Google Patents

High-efficiency automatic blanking device for touch screen processing Download PDF

Info

Publication number
CN113911739A
CN113911739A CN202111136862.3A CN202111136862A CN113911739A CN 113911739 A CN113911739 A CN 113911739A CN 202111136862 A CN202111136862 A CN 202111136862A CN 113911739 A CN113911739 A CN 113911739A
Authority
CN
China
Prior art keywords
group
automatic blanking
cabinet
blanking device
touch
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
Application number
CN202111136862.3A
Other languages
Chinese (zh)
Inventor
陆磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suqian Mingren Photoelectric Technology Co ltd
Original Assignee
Suqian Mingren Photoelectric Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suqian Mingren Photoelectric Technology Co ltd filed Critical Suqian Mingren Photoelectric Technology Co ltd
Priority to CN202111136862.3A priority Critical patent/CN113911739A/en
Publication of CN113911739A publication Critical patent/CN113911739A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/061Lifting, gripping, or carrying means, for one or more sheets forming independent means of transport, e.g. suction cups, transport frames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/068Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2249/00Aspects relating to conveying systems for the manufacture of fragile sheets
    • B65G2249/04Arrangements of vacuum systems or suction cups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2249/00Aspects relating to conveying systems for the manufacture of fragile sheets
    • B65G2249/04Arrangements of vacuum systems or suction cups
    • B65G2249/045Details of suction cups suction cups

Abstract

The invention discloses a high-efficiency automatic blanking device for processing a touch screen, which comprises a cabinet, wherein the cabinet is in a shape like a Chinese character 'tu', a conveying device is arranged at the upper part of the cabinet, a grabbing device is arranged at the upper part of the conveying device, and material receiving devices are arranged at two sides of the conveying device, so that the high-efficiency automatic blanking device has the beneficial effects that: automatic material receiving of a machine is realized, and the production efficiency can be effectively improved; the double grippers work simultaneously, so that useless actions of equipment can be reduced, material is collected at two sides simultaneously, and the working efficiency is further improved; receive the material platform from top to bottom the equidistance and slide, prevent on the one hand that the touch-sensitive screen distance of falling is too big, cause the touch-sensitive screen damage, it is accurate to pile up the position when also guaranteeing the unloading simultaneously, prevents to pile up and leads to the fact because of the dislocation when highly too high and emptys.

Description

High-efficiency automatic blanking device for touch screen processing
Technical Field
The invention relates to the technical field of touch screens, in particular to a high-efficiency automatic blanking device for processing a touch screen.
Background
The touch screen is also called as touch screen or touch panel, and is an inductive liquid crystal display device capable of receiving input signals of a touch head and the like, when a graphical button on the screen is touched, a touch feedback system on the screen can drive various connecting devices according to a pre-programmed program, so that the touch screen can be used for replacing a mechanical button panel, and vivid video and audio effects can be produced by a liquid crystal display picture.
In the present industrial production process, the unloading is all received the material through the manual work and is stacked after the touch-sensitive screen processing, and efficiency is lower, and partial enterprise adopts machinery to receive the material, nevertheless receives the material part and fixes, causes stacking of touch-sensitive screen comparatively scattered, causes the final product extrusion atress uneven easily, causes the product damage.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: unloading is all received the material through the manual work and is stacked after the touch-sensitive screen processing, and efficiency is lower, and partial enterprise adopts machinery to receive the material, nevertheless receives the material part fixed, causes stacking of touch-sensitive screen comparatively scattered, causes the final product extrusion atress uneven easily, causes the product damage.
(II) technical scheme
In order to solve the problems that blanking is carried out manually after the touch screen is processed, material collection and stacking are carried out, the efficiency is low, partial enterprises adopt mechanical material collection, but material collection parts are fixed, so that the stacking of the touch screen is scattered, the extrusion stress of final products is uneven, and the products are damaged, the invention provides the following technical scheme: the automatic feeding device comprises a cabinet, wherein the cabinet is in a convex shape, a conveying device is arranged at the upper part of the cabinet, a grabbing device is arranged at the upper part of the conveying device, and material receiving devices are arranged at two sides of the conveying device;
the conveying device comprises a group of parallel baffles, a plurality of guide rollers are arranged on one group of baffles, a group of conveying belts are arranged on the plurality of guide rollers, the upper parts of the group of conveying belts are horizontal and equal in height, a driving roller is further arranged on the group of baffles, a first motor is arranged in the cabinet and connected with the driving roller, a limiting plate is arranged in the middle of the group of baffles, a touch switch is arranged on the limiting plate, and the touch switch is electrically connected with the first motor;
the grabbing device comprises connecting rods arranged on two sides of a group of baffles, sliding rails are arranged on the upper portions of the connecting rods, a group of grippers capable of sliding on the sliding rails are arranged on the sliding rails, the sliding direction of the grippers is perpendicular to the advancing direction of the conveyor belt, the group of grippers are connected with each other, a first air cylinder is arranged on the upper portions of the connecting rods, and the head end of the telescopic portion of the first air cylinder is connected with the group of grippers and can drive the group of grippers to slide on the sliding rails;
the material receiving device comprises a material receiving platform, a set of limiting rods are arranged at one end of the material receiving platform, one end of the material receiving platform is sleeved on the limiting rods, a stepping lead screw motor is arranged at the bottom of the cabinet, the rotating shaft direction of the stepping lead screw motor is parallel to the limiting rods, the stepping lead screw motor can drive the material receiving platform to slide up and down on the limiting rods, and first blocking rods are arranged on two sides of the material receiving platform.
Further, the gripper comprises a first gripper and a second gripper, the first gripper comprises a first sliding block, a horizontal mounting plate is arranged on the first sliding block, a group of second cylinders are arranged on the mounting plate, and first suckers are arranged at the telescopic end parts of the group of second cylinders; the second tongs includes the second slider, is equipped with the third cylinder that the direction is decurrent on the second slider, and the flexible head end of third cylinder is equipped with the pneumatic valve, and the pneumatic valve lower part is equipped with even board, and even board lower part is equipped with a set of second sucking disc, and the pneumatic valve is connected with first sucking disc and second sucking disc.
Furthermore, one end of the material receiving platform, which is close to the limiting rod, is provided with a vertical second stop rod.
Further, the material that the rack used is the aluminium alloy.
Furthermore, the number of the first gear rods is 4.
(III) advantageous effects
The invention has the beneficial effects that:
(1) automatic material receiving of a machine is realized, and the production efficiency can be effectively improved;
(2) the double grippers work simultaneously, so that useless actions of equipment can be reduced, material is collected at two sides simultaneously, and the working efficiency is further improved;
(3) receive the material platform from top to bottom the equidistance and slide, prevent on the one hand that the touch-sensitive screen distance of falling is too big, cause the touch-sensitive screen damage, it is accurate to pile up the position when also guaranteeing the unloading simultaneously, prevents to pile up and leads to the fact because of the dislocation when highly too high and emptys.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of another angle structure of the present invention;
FIG. 3 is an enlarged view of part A;
FIG. 4 is a top view of the present invention;
FIG. 5 is a right side view of the present invention;
FIG. 6 is a sectional view taken along line A-A;
in the figure: 1-a cabinet, 2-a conveying device, 3-a gripping device and 4-a material receiving device;
2 a-a baffle, 2 b-a guide roller, 2 c-a conveyor belt, 2 d-a transmission roller, 2 e-a first motor, 2 f-a limiting plate and 2 g-a touch switch;
3 a-connecting rod, 3 b-sliding rail, 3 c-gripper, 3 d-first cylinder, 3 e-first gripper and 3 f-second gripper;
4 a-material receiving platform, 4 b-limiting rod, 4 c-stepping screw motor, 4 d-first gear rod and 4 e-second gear rod;
3 ea-a first slide block, 3 eb-a second cylinder, 3 ec-a first sucker;
3 fa-second slide block, 3 fb-third cylinder, 3 fc-pneumatic valve, 3 fd-connecting plate and 3 fe-second sucker.
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 the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, the present invention provides the following technical solutions: the device comprises a cabinet 1, wherein the cabinet is in a convex shape, a conveying device 2 is arranged at the upper part of the cabinet 1, a grabbing device 3 is arranged at the upper part of the conveying device 2, and material receiving devices 4 are arranged at two sides of the conveying device 2;
the conveying device 2 comprises a group of parallel baffles 2a, a plurality of guide rollers 2b are arranged on the group of baffles 2a, a group of conveying belts 2c are arranged on the plurality of guide rollers 2b, the upper parts of the group of conveying belts 2c are horizontal and equal in height, a transmission roller 2d is further arranged on the group of baffles 2a, a first motor 2e is arranged inside the cabinet, the first motor 2e is connected with the transmission roller 2d, a limiting plate 2f is arranged in the middle of the group of baffles 2a, a touch switch 2g is arranged on the limiting plate 2f, and the touch switch 2g is electrically connected with the first motor 2 e;
the grabbing device 3 comprises connecting rods 3a arranged on two sides of a group of baffles 2a, sliding rails 3b are arranged on the upper portions of the connecting rods 3a, a group of grippers 3c capable of sliding on the sliding rails 3b are arranged on the sliding rails 3b, the sliding direction of the grippers 3c is perpendicular to the advancing direction of the conveyor belt 2c, the group of grippers 3c are connected with each other, a first air cylinder 3d is arranged on the upper portion of the connecting rods 3a, and the head end of the telescopic portion of the first air cylinder 3d is connected with the group of grippers 3c and can drive the group of grippers 3c to slide on the sliding rails 3 b;
the material receiving device 4 comprises a material receiving platform 4a, one end of the material receiving platform 4a is provided with a group of limiting rods 4b, one end of the material receiving platform 4a is sleeved on the limiting rods 4b, the bottom of the cabinet 1 is provided with a stepping screw motor 4c, the rotating shaft direction of the stepping screw motor 4c is parallel to the limiting rods 4b, the stepping screw motor 4b can drive the material receiving platform 4a to slide up and down on the limiting rods 4b, and the two sides of the material receiving platform 4a are provided with first gear rods 4 d.
Further, the gripper 3c comprises a first gripper 3e and a second gripper 3f, the first gripper 3e comprises a first sliding block 3ea, a horizontal mounting plate is arranged on the first sliding block 3ea, a group of second cylinders 3eb is arranged on the mounting plate, and the ends of the telescopic parts of the group of second cylinders 3eb are provided with first suction discs 3 ec; the second gripper 3f comprises a second sliding block 3fa, a third cylinder 3fb in a downward direction is arranged on the second sliding block 3fa, a pneumatic valve 3fc is arranged at the head end of a telescopic part of the third cylinder 3fb, a connecting plate 3fd is arranged at the lower part of the pneumatic valve 3fc, a group of second suckers 3fe is arranged at the lower part of the connecting plate 3fd, and the pneumatic valve 3fc is connected with the first suckers 3ec and the second suckers 3 fe; a vertical second stop rod 4e is arranged at one end of the material receiving platform 4a close to the limiting rod 4b, and the cabinet 1 is made of aluminum profiles; the number of the first gear rods 4d is 4.
When the device is used, the device is placed at the tail end of a feeding belt, so that a touch screen can naturally move to a conveying belt 2c under the action of the feeding belt and then moves forwards on the conveying belt 2c, when the touch screen moves to a position of a limiting plate 2f and is in contact with a touch switch 2g, a first motor is closed at the moment, the receiving error caused by the overlapping and extrusion of too many touch screens is prevented, a second sucker 3fe is positioned right above the touch screen at the moment, the second sucker 3fe downwards sucks the touch screen under the action of a third cylinder 3fb and a pneumatic valve 3fc, then under the action of a first cylinder 3d, the second sucker 3de drives the touch screen to move right above a receiving device 4 at one side and put down, a material receiving table 4a is adjusted to a proper height by a stepping screw rod motor 4c at the moment, and when the touch screen is put down by the downward movement of the third cylinder 3fb, the touch screen can be stably placed on the material receiving table 4a, when the second gripper 3f is used for feeding, the first gripper 3e can realize the grabbing action on the other touch screen on the conveying belt under the action of the first cylinder 3d and the second cylinder 3eb, so that when the second gripper 3f is reset, the first gripper 3e can also realize the feeding on the material receiving device 4 on the other side, the double grippers work simultaneously, the useless actions of the equipment can be reduced, the two sides receive the materials simultaneously, and the working efficiency is further improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. The utility model provides a touch-sensitive screen processing is with high-efficient automatic unloader which characterized in that: the automatic feeding device comprises a cabinet (1), wherein the cabinet is in a convex shape, a conveying device (2) is arranged at the upper part of the cabinet (1), a grabbing device (3) is arranged at the upper part of the conveying device (2), and material receiving devices (4) are arranged on two sides of the conveying device (2);
the conveying device (2) comprises a group of parallel baffles (2a), a plurality of guide rollers (2b) are arranged on the group of baffles (2a), a group of conveying belts (2c) are arranged on the plurality of guide rollers (2b), the upper parts of the group of conveying belts (2c) are horizontal and equal in height, a transmission roller (2d) is further arranged on the group of baffles (2a), a first motor (2e) is arranged inside the cabinet, the first motor (2e) is connected with the transmission roller (2d), a limiting plate (2f) is arranged in the middle of the group of baffles (2a), a touch switch (2g) is arranged on the limiting plate (2f), and the touch switch (2g) is electrically connected with the first motor (2 e);
the grabbing device (3) comprises connecting rods (3a) arranged on two sides of a group of baffles (2a), a sliding rail (3b) is arranged on the upper portion of each connecting rod (3a), a group of hand grips (3c) capable of sliding on the corresponding sliding rail (3b) are arranged on the corresponding sliding rail (3b), the sliding direction of each hand grip (3c) is perpendicular to the advancing direction of the corresponding conveying belt (2c), the group of hand grips (3c) are connected with each other, a first air cylinder (3d) is arranged on the upper portion of each connecting rod (3a), and the head end of the telescopic portion of each first air cylinder (3d) is connected with the group of hand grips (3c) and can drive the group of hand grips (3c) to slide on the corresponding sliding rail (3 b);
receiving device (4) are including receiving material platform (4a), receive material platform (4a) one end and be equipped with a set of gag lever post (4b), receive material platform (4a) pot head and establish on gag lever post (4b), rack (1) bottom is equipped with step screw motor (4c), step screw motor (4c) pivot direction with gag lever post (4b) parallel, step screw motor (4b) can drive receive material platform (4a) and be in slide from top to bottom on gag lever post (4b), receive material platform (4a) both sides and be equipped with first shelves pole (4 d).
2. The efficient automatic blanking device for processing the touch screen as claimed in claim 1, wherein the efficient automatic blanking device comprises: the gripper (3c) comprises a first gripper (3e) and a second gripper (3f), the first gripper (3e) comprises a first sliding block (3ea), a horizontal mounting plate is arranged on the first sliding block (3ea), a group of second cylinders (3eb) is arranged on the mounting plate, and first suckers (3ec) are arranged at the telescopic parts of the group of second cylinders (3 eb); the second gripper (3f) comprises a second slider (3fa), a third cylinder (3fb) with the downward direction is arranged on the second slider (3fa), a pneumatic valve (3fc) is arranged at the end of a telescopic portion of the third cylinder (3fb), a connecting plate (3fd) is arranged on the lower portion of the pneumatic valve (3fc), a group of second suckers (3fe) are arranged on the lower portion of the connecting plate (3fd), and the pneumatic valve (3fc) is connected with the first suckers (3ec) and the second suckers (3 fe).
3. The efficient automatic blanking device for processing the touch screen as claimed in claim 1, wherein the efficient automatic blanking device comprises: and one end of the material receiving platform (4a), which is close to the limiting rod (4b), is provided with a vertical second stop rod (4 e).
4. The efficient automatic blanking device for processing the touch screen as claimed in claim 1, wherein the efficient automatic blanking device comprises: the cabinet (1) is made of aluminum profiles.
5. The efficient automatic blanking device for processing the touch screen as claimed in claim 1, wherein the efficient automatic blanking device comprises: the number of the first gear rods (4d) is 4.
CN202111136862.3A 2021-09-27 2021-09-27 High-efficiency automatic blanking device for touch screen processing Pending CN113911739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111136862.3A CN113911739A (en) 2021-09-27 2021-09-27 High-efficiency automatic blanking device for touch screen processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111136862.3A CN113911739A (en) 2021-09-27 2021-09-27 High-efficiency automatic blanking device for touch screen processing

Publications (1)

Publication Number Publication Date
CN113911739A true CN113911739A (en) 2022-01-11

Family

ID=79236463

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111136862.3A Pending CN113911739A (en) 2021-09-27 2021-09-27 High-efficiency automatic blanking device for touch screen processing

Country Status (1)

Country Link
CN (1) CN113911739A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105083628A (en) * 2015-09-06 2015-11-25 成都康河机械设备有限公司 Automatic tray arrangement machine capable of being used for dumpling packaging
CN206250323U (en) * 2016-12-02 2017-06-13 鹤壁市诺信电子有限公司 A kind of laminating machine for producing battery
CN108069251A (en) * 2018-01-15 2018-05-25 刘群翠 A kind of full-automatic double pawl crawl collecting machines
CN211197852U (en) * 2019-10-28 2020-08-07 青岛智腾自动化设备有限公司 Material conveyer in duplex position
CN212768511U (en) * 2020-04-15 2021-03-23 重庆城市职业学院 Double-station sheet stacking mechanism
CN213108438U (en) * 2020-05-13 2021-05-04 青岛万诺智能装备有限公司 A pneumatic material feeding unit for container bag punches a hole

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105083628A (en) * 2015-09-06 2015-11-25 成都康河机械设备有限公司 Automatic tray arrangement machine capable of being used for dumpling packaging
CN206250323U (en) * 2016-12-02 2017-06-13 鹤壁市诺信电子有限公司 A kind of laminating machine for producing battery
CN108069251A (en) * 2018-01-15 2018-05-25 刘群翠 A kind of full-automatic double pawl crawl collecting machines
CN211197852U (en) * 2019-10-28 2020-08-07 青岛智腾自动化设备有限公司 Material conveyer in duplex position
CN212768511U (en) * 2020-04-15 2021-03-23 重庆城市职业学院 Double-station sheet stacking mechanism
CN213108438U (en) * 2020-05-13 2021-05-04 青岛万诺智能装备有限公司 A pneumatic material feeding unit for container bag punches a hole

Similar Documents

Publication Publication Date Title
CN105397825B (en) The side of Turnover Box carries collet formula conveying robot and method for carrying
CN204737432U (en) Horizontal stacker of full -automatic glass
CN209051652U (en) A kind of blanking stacker mechanism
CN112456135A (en) Plate separating equipment
CN211711230U (en) Intelligent PCB bagging machine
CN112045080A (en) Correcting unit suitable for thin motor punching of jumbo size
CN112407944A (en) Unloader on frame is inserted to circuit board
CN211444139U (en) Automatic sheet material stacking machine
CN113911739A (en) High-efficiency automatic blanking device for touch screen processing
CN109733676A (en) A kind of stacker
CN212173476U (en) Hardware conveying device with better stability
CN210763113U (en) Double-functional fast switching automatic feeding and discharging equipment
CN210392962U (en) Shelf board stacking device for goods shelf
CN219636354U (en) Novel multifunctional robot stacker crane gripper
CN109607221B (en) Assembled foam stacking and unstacking equipment
CN110877811A (en) Integrated automatic bottle feeding machine
CN110803523A (en) Automatic sheet material stacking machine
CN116142556A (en) Paper buttress grabbing device
CN216548498U (en) Automatic trigger of putting of panel processing of PCB
CN214651897U (en) Iron sheet conveying device
CN202877426U (en) Stator feeding and discharging device
CN214893622U (en) FPC material loading detection device and FPC automatic detection line
CN211889732U (en) Automatic magnet releasing machine
CN210614907U (en) Punch machining center
CN212197509U (en) Automatic unloader that goes up of multi-disc material

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

Application publication date: 20220111

RJ01 Rejection of invention patent application after publication