CN112958335A - Paint spraying device capable of rapidly moving painted plate and moving method - Google Patents

Paint spraying device capable of rapidly moving painted plate and moving method Download PDF

Info

Publication number
CN112958335A
CN112958335A CN202110407371.1A CN202110407371A CN112958335A CN 112958335 A CN112958335 A CN 112958335A CN 202110407371 A CN202110407371 A CN 202110407371A CN 112958335 A CN112958335 A CN 112958335A
Authority
CN
China
Prior art keywords
wall
ring
arc
adjusting
rod
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Withdrawn
Application number
CN202110407371.1A
Other languages
Chinese (zh)
Inventor
柳华清
张毅
何明辉
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.)
Nanjing Hanxiyue Automation Technology Co Ltd
Original Assignee
Nanjing Hanxiyue Automation 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 Nanjing Hanxiyue Automation Technology Co Ltd filed Critical Nanjing Hanxiyue Automation Technology Co Ltd
Priority to CN202110407371.1A priority Critical patent/CN112958335A/en
Publication of CN112958335A publication Critical patent/CN112958335A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts

Landscapes

  • Spray Control Apparatus (AREA)

Abstract

The invention discloses a paint spraying device capable of rapidly moving a painted plate and a moving method, and relates to the technical field related to plate paint spraying. According to the invention, the adjusting ring fixedly connected with the upper end face of the bearing table is arranged, meanwhile, the inner wall of the adjusting ring is provided with the annular groove, in addition, the adjusting ring is connected with the adjustable arc-shaped plate through the annular groove, the tail end of the arc-shaped plate is fixedly connected with the fixing mechanism for clamping the plate, the plate is fixed by the fixing mechanism, and the plate in the paint spraying operation can be adjusted at any angle by adjusting the arc-shaped plate, so that the working efficiency of the paint spraying operation is improved, and the operation is convenient and fast.

Description

Paint spraying device capable of rapidly moving painted plate and moving method
Technical Field
The invention relates to the technical field related to plate painting, in particular to a paint spraying device and a moving method for quickly moving a painted plate.
Background
Plate production is very common in real life, the operation that is essential in the panel manufacturing process just includes the processing of spraying paint to the panel, the processing of spraying paint is carried out to the panel and can be according to the outside colour of user demand change panel, the while is sprayed paint to the panel and is handled can effectually play the guard action to the panel, the operation of spraying paint is directly placed panel and workstation in prior art, can not change the panel angle according to the spraying demand in real time, the operation is very loaded down with trivial details, the paint spraying apparatus and the removal method that have the panel fast travel that sprays paint have been designed here, so as to solve above-mentioned problem.
Disclosure of Invention
The present invention is directed to a paint spraying apparatus and a moving method thereof for rapidly moving a painted panel to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: paint spraying apparatus with to panel rapid draing sprays paint, including the plummer, the up end of plummer is provided with the adjustment mechanism who is used for adjusting the panel angle, and wherein, the plummer provides the installation impetus for adjustment mechanism.
Adjustment mechanism includes the adjustable ring, and the outer wall of adjustable ring and the up end fixed connection of plummer, the ring channel has been seted up to the inner wall of adjustable ring, and the adjustable ring is connected with adjustable arc through the ring channel, and wherein, the ring channel provides the track for the arc activity, and the terminal fixedly connected with of arc is used for the fixed establishment of centre gripping panel, can carry out the centre gripping fixedly to the panel that needs the processing of spraying paint through fixed establishment.
In further embodiment, the middle part of arc is connected with the slider through the pivot rotation, the lateral wall of slider and the inner chamber wall sliding connection of ring channel, slide along the ring channel inner chamber through the slider and can drive arc synchronous motion, the lateral wall of ring channel rotates and installs the transmission ring, one side and the slider outer wall fixed connection of transmission ring, rotate along the adjustable ring axis through the transmission ring, can drive slider synchronous motion, the outer wall fixedly connected with of adjustable ring is used for rotating the first motor that provides power for the transmission ring, switch on first motor, so that drive the transmission ring and rotate.
In a further embodiment, a second motor is fixedly connected inside the sliding block, a power output shaft of the second motor is fixedly connected with the outer wall of the arc-shaped plate through the matching of a worm gear and a worm, and the second motor is used as a power source for the arc-shaped plate to rotate along the axis of the sliding block.
In a further embodiment, fixed establishment includes the fixed axle, the outer wall of fixed axle and the outer wall fixed connection of arc, the inner chamber slidable mounting of fixed axle has L type pole, L type pole can slide along the axis direction of fixed axle inner chamber, the movable groove has been seted up to the fixed axle inner wall, the inner wall of movable groove rotates installs the regulation pole, the one end fixedly connected with brake lever of regulation pole, the spacing groove that is used for the brake lever to peg graft is evenly seted up to the outer wall of L type pole, through rotating the regulation pole, can make the brake lever accomplish peg graft with the spacing groove, and then accomplish the fixed to L type pole.
In a further embodiment, the fixing mechanism further comprises a control rod, the other end of the adjusting rod is provided with a compensation groove, the tip end of the control rod penetrates through the outer wall of the fixing shaft and is in sliding connection with the compensation groove through a pin shaft, the adjusting rod can be controlled to rotate through adjustment of the control rod, and therefore the insertion and separation of the brake rod and the limiting groove are completed.
In a further embodiment, one end of the control rod, which is far away from the brake rod, is made of iron, a magnet for attracting the adjusting rod is embedded in the inner wall of the movable groove, and the brake rod at the other end of the adjusting rod has a tendency of being inserted into the limiting groove in real time through the magnet attracting the adjusting rod.
In a further embodiment, the fixing mechanism further comprises an ejector rod, the radial outer wall of the ejector rod is connected with one end, away from the fixing shaft, of the L-shaped rod through internal and external thread matching, the ejector rod can move axially through rotation of the ejector rod, and therefore clamping and fixing of the plate are achieved.
Preferably, the moving method based on the painting device for rapidly moving the painted plate comprises the following steps:
a1, after a plate to be painted and an arc-shaped plate are fixed through a fixing mechanism, a first motor drives a transmission ring to rotate along the axis of an adjusting ring, the adjusting ring drives the arc-shaped plate to rotate along the axis of the adjusting ring through a sliding block, and meanwhile, a second motor drives the arc-shaped plate to rotate along the axis direction of the sliding block, so that the plate to be painted can be subjected to all-dimensional angle adjustment;
a2, when the panel that needs to treat the spraying paint is fixed, at first place the four corners of panel respectively between two corresponding ejector pins, through pushing away the control lever to the fixed axle inboard this moment, make the regulation pole rotate until brake lever and spacing groove separation, slide adjusting L type pole this moment, tentatively fix panel through ejector pin pointed end, through the rotatory ejector pin of adjusting at last, make the most advanced top of ejector pin tight panel, just accomplished the fixing to panel this moment.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a paint spraying device and a moving method for quickly moving a paint spraying plate.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic structural view of an arc plate according to the present invention;
FIG. 3 is a cross-sectional view of the adjusting ring of the present invention;
FIG. 4 is a cross-sectional view of a stationary shaft according to the present invention;
fig. 5 is a cross-sectional view of an L-shaped rod of the present invention.
In the figure: 1. a bearing table; 2. an adjustment mechanism; 21. an adjusting ring; 22. an arc-shaped plate; 23. an annular groove; 24. a first motor; 25. a second motor; 26. a drive ring; 27. a slider; 3. a fixing mechanism; 31. a fixed shaft; 32. a top rod; 33. an L-shaped rod; 34. a limiting groove; 35. a magnet; 36. a compensation groove; 37. a control lever; 38. adjusting a rod; 39. a movable groove; 310. brake lever.
Detailed Description
The embodiment of the application solves the problems in the prior art by providing the paint spraying device and the moving method for quickly moving the painted plate; the following will clearly and completely describe the technical solutions 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 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.
Example one
Referring to fig. 1-5, the present embodiment provides a paint spraying apparatus and a moving method for quickly moving a painted plate, including a bearing table 1, an adjusting mechanism 2 for adjusting an angle of the plate is disposed on an upper end surface of the bearing table 1, and the bearing table 1 is used for installing the adjusting mechanism 2 to provide a supporting and fixing effect.
In addition, fastening bolt holes are formed in two sides of the bearing table 1, so that the bearing table 1 is fixedly connected with the ground.
The adjusting mechanism 2 comprises an adjusting ring 21, the outer wall of the adjusting ring 21 is fixedly connected with the upper end face of the plummer 1, and the plummer 1 provides an installation force application point for the adjusting ring 21 so that the adjusting ring 21 is integrally fixed relative to the ground.
Annular groove 23 has been seted up to the inner wall of adjustable ring 21, and adjustable ring 21 is connected with adjustable arc 22 through annular groove 23, and the terminal fixedly connected with of arc 22 is used for the fixed establishment 3 of centre gripping panel, and arc 22 is used for providing the impetus for fixed establishment 3.
By adjusting the position of the arc 22 with respect to the adjusting ring 21, the angle of the sheet material held by the fixing means 3 can be adjusted during the painting operation.
The middle part of arc 22 is connected with slider 27 through the pivot rotation, and the lateral wall of slider 27 and the inner chamber wall sliding connection of ring channel 23 can drive arc 22 along the axis rotation of ring channel 23 through slider 27 along ring channel 23 inner wall slip, and ring channel 23 and adjustable ring 21 axis coincidence in addition, and arc 22 rotates along the axis of ring channel 23, and arc 22 rotates along the axis of adjustable ring 21 promptly.
The side wall of the annular groove 23 is rotatably mounted with a driving ring 26, wherein the driving ring 26 coincides with the axis of the adjusting ring 21.
One side of the driving ring 26 is fixedly connected with the outer wall of the sliding block 27, the sliding block 27 can be driven to synchronously rotate along the axis of the adjusting ring 21 by the rotation of the driving ring 26, and the sliding block 27 drives the arc-shaped plate 22 to revolve along the adjusting ring 21.
The outer wall fixedly connected with of adjustable ring 21 is used for rotating the first motor 24 that provides power for driving ring 26, and wherein the power transmission axle fixedly connected with worm of first motor 24, the worm is connected with the worm wheel through the meshing, and the worm wheel passes through the outer wall meshing of bevel gear and driving ring 26, and first motor 24 passes through the worm gear and is connected with driving ring 26, because the worm gear cooperation transmission has the dead nature of one-way lock, can prevent that driving ring 26 from driving first motor 24 and rotating.
The inside fixedly connected with second motor 25 of slider 27, the power output shaft of second motor 25 pass through worm gear cooperation and the outer wall fixed connection of arc 22, is connected with the worm through the power transmission axle of second motor 25, and the worm meshes with the worm wheel, and the axial direction central point of worm wheel puts through even axle and arc 22 fixed connection simultaneously, can drive arc 22 along slider 27 axis rotation through second motor 25.
In addition, the second motor 25 is connected with the arc-shaped plate 22 through a worm gear and a worm, so that the arc-shaped plate 22 can be prevented from driving the second motor 25 to rotate.
In this embodiment, fixed back with the arc 22 through fixed establishment 3 will need the panel that sprays paint, drive the axis rotation of driving ring 26 along adjustable ring 21 through first motor 24, and pass through slider 27 by adjustable ring 21 and drive arc 22 and rotate along adjustable ring 21 axis, drive arc 22 simultaneously through second motor 25 and rotate along slider 27 axis direction, alright carry out all-round angle modulation with the panel that need spray paint this moment, and the simple operation improves the work efficiency of the operation of spraying paint.
Example two
Referring to fig. 1-5, a further improvement is made on the basis of embodiment 1:
the fixing mechanism 3 comprises a fixing shaft 31, the outer wall of the fixing shaft 31 is fixedly connected with the outer wall of the arc-shaped plate 22, and the fixing shaft 31 is fixedly connected with the arc-shaped plate 22, so that when the arc-shaped plate 22 moves, the fixing shaft 31 can move synchronously.
An L-shaped rod 33 is slidably mounted in the inner cavity of the fixed shaft 31, wherein the L-shaped rod 33 can linearly slide along the inner cavity of the fixed shaft 31.
The inner wall of the fixed shaft 31 is provided with a movable groove 39, the inner wall of the movable groove 39 is rotatably provided with an adjusting rod 38, and the movable groove 39 provides a rotating space for the adjusting rod 38.
One end of the adjusting rod 38 is fixedly connected with the brake rod 310, the outer wall of the L-shaped rod 33 is uniformly provided with a limiting groove 34 for plugging the brake rod 310, and the effect of controlling the brake rod 310 to move can be achieved by rotating the adjusting rod 38 along the connecting position of the middle part of the adjusting rod and the side wall of the movable groove 39.
The brake bar 310 is to be moved by the adjusting bar 38 to complete the insertion and separation of the brake bar 310 and the limiting groove 34.
When the brake bar 310 is inserted into the limit groove 34, the L-shaped bar 33 can be limited from sliding along the inner cavity of the fixed shaft 31, and the L-shaped bar 33 can be fixed.
When the brake lever 310 is separated from the stopper groove 34, the L-shaped lever 33 can freely slide along the inner cavity of the fixed shaft 31 in a straight line.
In this embodiment, the relative distance between the two L-shaped rods 33 can be adjusted by sliding according to the thickness of the plate to be painted, so as to adapt to plates with different thicknesses.
The fixing mechanism 3 further comprises a control rod 37, the other end of the adjusting rod 38 is provided with a compensation groove 36, and the tip of the control rod 37 penetrates through the outer wall of the fixing shaft 31 and is slidably connected with the compensation groove 36 through a pin shaft.
The control rod 37 can slide along the axis of the control rod 37 relative to the fixed shaft 31, and the control rod 37 can slide along the axis of the control rod to drive the adjusting rod 38 to rotate, wherein the compensating groove 36 can be combined with the control rod 37 to move along the axis direction to form the arc-shaped track movement of the tip of the adjusting rod 38 when the adjusting rod rotates.
One end of the control rod 37, which is far away from the brake rod 310, is made of iron, the inner wall of the movable groove 39 is inlaid with a magnet 35 for attracting the adjusting rod 38, the other end of the adjusting rod 38 can be driven by the magnet 35 at the end, which is far away from the brake rod 310, of the adjusting rod 38, the brake rod 310 is inserted into the limiting groove 34 in real time, so that the brake rod 310 is inserted into the limiting groove 34 in real time, and the stability of limiting the L-shaped rod 33 can be guaranteed.
Fixing mechanism 3 includes ejector pin 32 again, and the radial outer wall of ejector pin 32 is connected through interior external screw thread fit and the one end that fixed axle 31 was kept away from to L type pole 33, uses L type pole 33 to carry out preliminary fixed back to panel, carries out accurate fixed to panel through rotation regulation ejector pin 32.
In summary, when a plate to be painted is to be fixed, the four corners of the plate are respectively placed between two corresponding ejector rods 32, at this time, the control rod 37 is pushed towards the inner side of the fixed shaft 31, the adjusting rod 38 is rotated until the brake rod 310 is separated from the limiting groove 34, the L-shaped rod 33 is adjusted in a sliding mode, the plate is preliminarily fixed through the tips of the ejector rods 32, and finally, the tips of the ejector rods 32 tightly push the plate through rotating the adjusting ejector rods 32, so that the plate is fixed, and the operation is convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. Paint spraying apparatus with panel rapid draing sprays paint, including plummer (1), its characterized in that: the upper end surface of the bearing table (1) is provided with an adjusting mechanism (2) for adjusting the angle of the plate;
adjustment mechanism (2) are including adjusting ring (21), the outer wall of adjusting ring (21) and the up end fixed connection of plummer (1), ring channel (23) have been seted up to the inner wall of adjusting ring (21), adjusting ring (21) are connected with adjustable arc (22) through ring channel (23), the terminal fixedly connected with of arc (22) is used for clamping plate's fixed establishment (3).
2. The painting apparatus with rapid movement of painted panels according to claim 1, characterized in that: the middle part of arc (22) is connected with slider (27) through the axle that links rotation, the lateral wall of slider (27) and the inner chamber wall sliding connection of ring channel (23), the lateral wall of ring channel (23) rotates and installs drive ring (26), one side and slider (27) outer wall fixed connection of drive ring (26), the outer wall fixed connection of adjustable ring (21) is used for rotating first motor (24) that provide power for drive ring (26).
3. The painting apparatus with rapid movement of painted panels according to claim 2, characterized in that: the inside fixedly connected with second motor (25) of slider (27), the power output shaft of second motor (25) passes through worm gear cooperation and the outer wall fixed connection of arc (22).
4. The painting apparatus with rapid movement of painted panels according to claim 1, characterized in that: fixed establishment (3) are including fixed axle (31), the outer wall of fixed axle (31) and the outer wall fixed connection of arc (22), the inner chamber slidable mounting of fixed axle (31) has L type pole (33), movable groove (39) have been seted up to fixed axle (31) inner wall, the inner wall of movable groove (39) is rotated and is installed regulation pole (38), the one end fixedly connected with brake lever (310) of adjusting pole (38), spacing groove (34) that are used for brake lever (310) to peg graft are evenly seted up to the outer wall of L type pole (33).
5. The painting apparatus with rapid movement of painted panels according to claim 4, characterized in that: the fixing mechanism (3) further comprises a control rod (37), the other end of the adjusting rod (38) is provided with a compensation groove (36), and the tip end of the control rod (37) penetrates through the outer wall of the fixing shaft (31) and is in sliding connection with the compensation groove (36) through a pin shaft.
6. The painting apparatus having a quick movement for a painted panel according to claim 5, wherein: one end of the control rod (37) far away from the brake rod (310) is made of iron, and a magnet (35) for attracting the adjusting rod (38) is embedded in the inner wall of the movable groove (39).
7. The painting apparatus having a quick movement for a painted panel according to claim 6, wherein: the fixing mechanism (3) further comprises an ejector rod (32), and the radial outer wall of the ejector rod (32) is connected with one end, far away from the fixing shaft (31), of the L-shaped rod (33) through internal and external thread matching.
8. A moving method of a painting apparatus having a quick movement function for a painted panel according to claim 1, comprising the steps of:
a1, after a plate to be painted is fixed with an arc-shaped plate (22) through a fixing mechanism (3), a transmission ring (26) is driven to rotate along the axis of an adjusting ring (21) through a first motor (24), the arc-shaped plate (22) is driven to rotate along the axis of the adjusting ring (21) through a sliding block (27) by the adjusting ring (21), meanwhile, the arc-shaped plate (22) is driven to rotate along the axis direction of the sliding block (27) through a second motor (25), and at the moment, all-directional angle adjustment can be carried out on the plate to be painted;
a2, when the panel that needs to treat the spraying paint is fixed, at first place the four corners of panel respectively between two ejector pins (32) that correspond, this moment through to fixed axle (31) inboard promotion control lever (37), make adjust pole (38) rotate, separate until brake lever (310) and spacing groove (34), slide this moment and adjust L type pole (33), through ejector pin (32) pointed end with panel preliminary fixed, at last through rotatory regulation ejector pin (32), make the most advanced top of ejector pin (32) tighten panel, this moment has just accomplished fixing to panel.
CN202110407371.1A 2021-04-15 2021-04-15 Paint spraying device capable of rapidly moving painted plate and moving method Withdrawn CN112958335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110407371.1A CN112958335A (en) 2021-04-15 2021-04-15 Paint spraying device capable of rapidly moving painted plate and moving method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110407371.1A CN112958335A (en) 2021-04-15 2021-04-15 Paint spraying device capable of rapidly moving painted plate and moving method

Publications (1)

Publication Number Publication Date
CN112958335A true CN112958335A (en) 2021-06-15

Family

ID=76279878

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110407371.1A Withdrawn CN112958335A (en) 2021-04-15 2021-04-15 Paint spraying device capable of rapidly moving painted plate and moving method

Country Status (1)

Country Link
CN (1) CN112958335A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113510024A (en) * 2021-07-13 2021-10-19 李旭丹 Intelligent paint spraying device for surface of service consumption robot
CN115487963A (en) * 2022-09-30 2022-12-20 淄博恒胜变速箱有限公司 Paint spraying equipment for production of gearbox body and application method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113510024A (en) * 2021-07-13 2021-10-19 李旭丹 Intelligent paint spraying device for surface of service consumption robot
CN115487963A (en) * 2022-09-30 2022-12-20 淄博恒胜变速箱有限公司 Paint spraying equipment for production of gearbox body and application method thereof
CN115487963B (en) * 2022-09-30 2024-02-06 淄博恒胜变速箱有限公司 Paint spraying equipment for gearbox body production and application method thereof

Similar Documents

Publication Publication Date Title
CN112958335A (en) Paint spraying device capable of rapidly moving painted plate and moving method
US11203029B2 (en) Mold paint-spraying device
US20210304960A1 (en) Device and Method for Improving Coercivity of Ring-Shaped NdFeB Magnet
CN110919806B (en) Even carbonizing apparatus of plank superficial layer
CN102601006A (en) High-precision automatic paint sprayer and paint spraying method
CN113426611A (en) Automatic adjusting and conveying device for barrel paint spraying processing
CN102527550A (en) Painting device for hockey stick
CN108436791A (en) A kind of shot-peening fixture for thin wall component
CN116809276A (en) Furniture processing device
CN208712001U (en) A kind of spray equipment for revolving body
CN208321174U (en) A kind of pipeline of metal plate spraying
CN113117983B (en) Electronic cigarette shell inner wall rubber coating device
CN207176059U (en) Mask plate microscope carrier and deposition system
CN202591014U (en) Mold sleeving device of workpiece
CN202591018U (en) High-precision automatic paint spraying machine
CN203578131U (en) Glue smoothing mechanism of compound machine
CN219160894U (en) Air drying device
CN107498998B (en) A kind of eccentric sleeve type high-precision positioner of coding product examine machine spray head
CN216988215U (en) Easily colored pigment spraying device is handled to resin
CN220678316U (en) Plastic spraying device with uniform plastic spraying thickness
CN201586583U (en) Automatic priming spraying machine for hollow composite insulator
CN211637056U (en) Door paint spraying apparatus is used in electric motor car production
CN211865662U (en) Glue dispenser for gluing stator rotating shaft
CN219880346U (en) Spraying and baking integrated equipment for surface painting of solid wood laminated board
CN219463735U (en) Electrostatic spraying line

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20210615

WW01 Invention patent application withdrawn after publication