CN212888978U - Ultrasonic heat sealing machine - Google Patents

Ultrasonic heat sealing machine Download PDF

Info

Publication number
CN212888978U
CN212888978U CN202021066277.1U CN202021066277U CN212888978U CN 212888978 U CN212888978 U CN 212888978U CN 202021066277 U CN202021066277 U CN 202021066277U CN 212888978 U CN212888978 U CN 212888978U
Authority
CN
China
Prior art keywords
transmission shaft
plane
sealing machine
heat
plate
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.)
Expired - Fee Related
Application number
CN202021066277.1U
Other languages
Chinese (zh)
Inventor
刘四祥
刘星
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.)
Xiantao Xingrong Protective Equipment Co Ltd
Original Assignee
Xiantao Xingrong Protective Equipment 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 Xiantao Xingrong Protective Equipment Co Ltd filed Critical Xiantao Xingrong Protective Equipment Co Ltd
Priority to CN202021066277.1U priority Critical patent/CN212888978U/en
Application granted granted Critical
Publication of CN212888978U publication Critical patent/CN212888978U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model relates to an ultrasonic wave heat-sealing machine, include: the operation panel, a body, foot switch, the mount pad, the heat-sealing machine body is installed on the operation panel, foot switch is used for controlling body work, body one end bottom is located to the mount pad, body other end bottom fixed mounting is at the upper surface of operation panel, the body is the door-shaped structure, install the heat seal roller on the mount pad, the both ends of heat seal roller are provided with square shaft and round shaft, be provided with the transmission shaft that a level was arranged in the mount pad, the transmission shaft passes through the drive assembly drive and rotates, the removable grafting assembly of tip of square shaft and transmission shaft, one side that the transmission shaft was kept away from to the mount pad is provided with semi-circular breach, the round shaft is placed in semi-circular breach, and the heat seal roller, the transmission shaft, semi-circular breach coaxial line is arranged, the mount pad is provided with the buckling. The utility model has the advantages of can make things convenient for, swift dismouting heat seal roller, work efficiency is high.

Description

Ultrasonic heat sealing machine
Technical Field
The utility model belongs to the technical field of the technique of tailoring equipment and specifically relates to an ultrasonic heat-sealing machine is related to.
Background
At present, when producing medical protective clothing, fur clothing, raincoat and other clothing, an ultrasonic heat sealing machine is used for pressing edges, so that the sealing performance of the edges is good, the cloth is not damaged, and the phenomena of burrs and turned edges do not exist.
As shown in fig. 1 and 2, a conventional ultrasonic heat sealing machine includes: the device comprises an operation table 1, a body 2, a foot switch 3 and a mounting seat 4, wherein the body 2 is installed on the operation table 1, the foot switch 3 is placed on the ground to be used for controlling the body 2 to work, the mounting seat 4 is arranged at the bottom of one end of the body 2, the bottom of the other end of the body 2 is fixedly installed on the upper surface of the operation table 1, a heat sealing roller 6 is installed on the mounting seat 4 through a bolt, and the heat sealing roller 6 rotates under the driving of a driving assembly.
The above prior art solutions have the following drawbacks: the heat-seal roller is installed on the installation seat through the bolts, the installation seat and the driving assembly need to be removed integrally to replace the heat-seal roller, a plurality of bolts need to be screwed, and the installation and disassembly processes are complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultrasonic wave heat-sealing machine, have quick dismantlement, installation heat-sealing roller, and can guarantee the stable advantage of heat-sealing roller operation to prior art exists not enough.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
an ultrasonic heat sealing machine comprising: operation panel, body, foot switch, the body is installed on the operation panel, foot switch places subaerial in order to be used for control the body work, this ultrasonic heat-sealing machine still includes: the mounting seat is arranged at the bottom of one end of the body, the bottom of the other end of the body is fixedly arranged on the upper surface of the operating platform, the body is of a door-shaped structure, the heat sealing roller is detachably arranged on the mounting seat, a square shaft and a round shaft are arranged at two ends of the heat sealing roller, a transmission shaft which is horizontally arranged is arranged in the mounting seat and is driven to rotate by a driving component, the square shaft and the end part of the transmission shaft are detachably spliced and assembled, one side of the mounting seat far away from the transmission shaft is provided with a semicircular notch, the round shaft is placed in the semicircular notch, the heat seal roller, the transmission shaft and the semicircular gap are coaxially arranged, the mounting seat is provided with a buckling piece, the buckling piece limits and fixes the circular shaft in the semicircular notch and does not influence the free rotation of the circular shaft.
By adopting the technical scheme, in the working process, a worker holds clothes to be heat-sealed by hands, the body is controlled by the pedal switch to be more convenient and safer, the square shaft of the heat-sealing roller is inserted in the end face of the transmission shaft, the synchronous rotation of the heat-sealing roller and the transmission shaft can be ensured, the round shaft of the heat-sealing roller is limited by the buckling piece to rotate in the semicircular notch, and the heat-sealing roller is more convenient to install and disassemble due to the arrangement of the semicircular notch. When the heat seal roller needs to be replaced, the buckling piece is rotated, the heat seal roller is pulled out along the axial direction far away from the transmission shaft, then the heat seal roller is taken out from the semicircular notch, the bolts do not need to be screwed in the process, the heat seal roller can be quickly disassembled and installed on the installation seat, the installation and disassembly processes are simple, the time for disassembling and assembling the heat seal roller in a large amount is saved, and the work efficiency is indirectly improved.
The present invention may be further configured in a preferred example, wherein the mounting base comprises: go up roof, left otic placode, right otic placode, it fixes to go up the roof level body one end bottom, the up end fixed mounting of right otic placode is in the lower terminal surface of last roof, the up end fixed mounting of left otic placode is in the lower terminal surface of last roof, the right otic placode the left otic placode is parallel to each other, the mounting hole has been seted up to the right otic placode side, install in the mounting hole the transmission shaft, semi-circular breach is located on the left otic placode.
Through adopting above-mentioned technical scheme, above-mentioned structural design's mount pad simple structure, the preparation is convenient and with low costs, makes things convenient for the installation of heat seal roller moreover fixed.
The present invention may be further configured in a preferred example, wherein the driving assembly includes: driving motor, first sprocket, second sprocket, chain, driving motor fixes this is internal, first sprocket is established on driving motor's the output shaft, the second sprocket is established on the transmission shaft, the chain cover is established just transmission assembly between first sprocket and the second sprocket, the slot has been seted up to the top board, the chain passes the slot.
Through adopting above-mentioned technical scheme, in the working process, start driving motor, under the transmission of first sprocket, second sprocket, chain, the transmission shaft rotates and drives the heat seal roller and rotate, realizes the hot briquetting to the clothing, and first sprocket, second sprocket, chain installation, change process ratio convenient and fast, whole drive assembly transmission is steady and simple structure.
The utility model discloses can further configure to in a preferred example, left side otic placode is seted up semicircular notch place face is called first plane, the buckling piece includes: arc board, straight board, end panel and locking Assembly, arc board one end with first plane rotates to be connected and rotates the axis level and arranges, the other end of arc board with straight board fixed connection, the straight board is kept away from the locking breach has been seted up to the terminal surface of arc board, the end panel is the semicircle board, the end panel is fixed the arc board is kept away from the side end face of heat seal roller, be fixed with locking Assembly on the first plane, the straight board with when the first plane laminating, the arc board with the semicircle breach forms a round hole, locking Assembly's part is passed the locking breach will the straight board locks on the first plane.
Through adopting above-mentioned technical scheme, the buckling piece is under locking Assembly's effect, and the semi-circular breach of cooperation restricts the heat seal roller axle part in semi-circular breach, and the end panel blocks the axle, prevents that the heat seal roller from rocking along the axial in the course of the work, above-mentioned structural design's buckling piece simple structure, simple to operate.
The present invention may be further configured in a preferred example, wherein the locking assembly comprises: dead lever, turning block and spring, the dead lever is fixed on the first plane, the dead lever is kept away from first plane end an organic whole is provided with the flange, the turning block has been seted up and has been rotated the hole, the dead lever is worn to establish rotate downthehole, rotate the hole with the flange adaptation, it is provided with the fender ring to rotate the hole, keep off the ring internal diameter with the dead lever diameter equals, the spring is located keep off the ring with just be used for ordering about between the flange the turning block is close to the first plane, can pass during the vertical state of turning block the locking breach, just will when the turning block rotates to the horizontality the straight board compresses tightly.
Through adopting above-mentioned technical scheme, when the straight board was laminated with first plane, to keeping away from the turning block of the vertical state of first planar direction pulling, then rotatory turning block was the horizontality until the turning block, and the turning block loosens, and the turning block compresses tightly the straight board, and locking Assembly simple structure compresses tightly straight board process convenient and fast, easy operation, and the elasticity of spring can order about the better subsides of turning block tightly on the straight board.
The utility model discloses can further configure to in a preferred example, the turning block is kept away from first plane is provided with the pull ring.
Through adopting above-mentioned technical scheme, the setting of pull ring can make things convenient for the staff to stimulate and rotate the turning block with the finger.
The utility model discloses can further configure into in a preferred example, the straight board is kept away from the inlay card groove has been seted up to first planar terminal surface, inlay card groove with the locking breach is arranged perpendicularly, inlay card groove with turning block adaptation block.
Through adopting above-mentioned technical scheme, when the turning block compressed tightly the straight board, the turning block card was gone into the inlay card groove, and the heat seal roller can have certain pressure to the arc board when rotating, and the turning block card is gone into in the inlay card groove, and the inlay card groove has limiting displacement to the turning block, avoids the buckling piece to rotate for the heat seal roller rotates more stably.
The utility model discloses can further configure to in a preferred example, the bearing has less coefficient of friction, and the heat seal roller rotates more steadily, and bearing purchase low price, easy to assemble.
By adopting the technical scheme, the bearing is low in purchase price, convenient to install and more stable in rotation of the heat seal roller.
To sum up, the utility model discloses a following beneficial technological effect:
1. the heat seal roller can be quickly disassembled and assembled, can be cleaned and maintained in time, prolongs the service life of the heat seal roller, reduces the use cost and indirectly improves the working efficiency;
2. the heat seal roller can be quickly and conveniently assembled and disassembled by using the buckling piece and the locking component without screwing a screw.
Drawings
FIG. 1 is a schematic structural view of a conventional ultrasonic heat sealing machine;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural diagram of an embodiment of the present invention;
FIG. 4 is an enlarged view at B in FIG. 3;
fig. 5 is a schematic structural diagram of the mounting seat in the embodiment of the present invention, which is specifically shown in an exploded view.
Reference numerals: 1. an operation table; 2. a body; 3. a foot switch; 4. a mounting seat; 41. an upper top plate; 411. a rectangular hole; 42. a right ear plate; 43. A left ear panel; 431. a semicircular notch; 5. a drive shaft; 51. a square groove; 52. a second sprocket; 53. a chain; 6. a heat seal roller; 61. a square shaft; 62. a circular shaft; 621. a bearing; 7. a fastener; 71. an arc plate; 72. a straight plate; 721. locking the notch; 722. a clamping groove; 73. an end panel; 74. a locking assembly; 741. fixing the rod; 742. rotating the block; 743. a spring; 744. and (4) a pull ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 3, for the utility model discloses an ultrasonic heat sealing machine, including operation panel 1, body 2, foot switch 3, mount pad 4, body 2 is installed on operation panel 1, and foot switch 3 places subaerial in order to be used for controlling body 2 work, and foot switch 3 makes things convenient for workman control body 2 work on the horizontal support pole that operation panel 1 is close to ground through the mounting screw in this embodiment. The mount pad 4 is located 2 one end bottoms of body, and 2 other end bottoms of body pass through bolt fixed mounting at the upper surface of operation panel 1, and body 2 is door-shaped structure.
Referring to fig. 4 and 5, the mount 4 includes: the upper top plate 41, the right ear plate 42 and the left ear plate 43, the upper top plate 41, the right ear plate 42 and the left ear plate 43 are all stainless steel plates, the upper top plate 41 and the right ear plate 42 are rectangular, the left ear plate 43 is L-shaped as a whole, the upper top plate 41 is horizontally fixed at the bottom of one end of the body 2, and in the embodiment, the upper top plate 41 is fixed on the body 2 (not shown in the figure) specifically through bolts. The up end welded fastening of right otic placode 42 is at the lower terminal surface of last roof 41, and the up end welded fastening of left otic placode 43 is at the lower terminal surface of last roof 41, and right otic placode 42, left otic placode 43 are parallel to each other, and the mounting hole (not pointed out in the figure) has been seted up to right otic placode 42 side, and installation transmission shaft 5 in the mounting hole, transmission shaft 5 pass through the drive assembly drive and rotate, and transmission shaft 5 keeps away from the terminal surface of mounting hole and has seted up square groove 51. The left ear plate 43 is provided with a semicircular notch 431, and the surface of the left ear plate 43 on which the semicircular notch 431 is provided is called a first plane. Heat seal roller 6's both ends welded fastening has square shaft 61 and circle axle 62, and the welding department is more level and smooth through the processing of polishing, square shaft 61 and square groove 51 adaptation, the removable grafting assembly of the tip of square shaft 61 and transmission shaft 5, be equipped with bearing 621 on the circle axle 62, circle axle 62 is placed in semi-circular breach 431, bearing 621 and semi-circular breach 431 adaptation, and heat seal roller 6, transmission shaft 5, semi-circular breach 431 coaxial line is arranged, first plane rotation is provided with buckling piece 7, buckling piece 7 fixes the restriction of circle axle 62 in semi-circular breach 431 and does not influence circle axle 62 free rotation.
The drive assembly includes: driving motor, first sprocket, second sprocket 52, chain 53, driving motor passes through the bolt fastening in body 2 (not shown in the figure), and first sprocket is established on driving motor's output shaft (not shown in the figure), and second sprocket 52 overlaps and establishes on transmission shaft 5, and chain 53 overlaps and establishes between first sprocket and second sprocket 52 and the transmission assembly, and rectangular hole 411 has been seted up to upper plate 41, and chain 53 passes rectangular hole 411.
Fastener 7 comprises: the heat sealing roll comprises an arc plate 71, a straight plate 72, an end plate 73 and a locking assembly 74, wherein the arc plate 71, the straight plate 72 and the end plate 73 are all made of stainless steel plates, the arc plate 71 is integrally semicircular, one end of the arc plate 71 is rotatably connected with a first plane and the rotation axis of the arc plate 71 is horizontally arranged, the other end of the arc plate 71 is fixedly connected with the straight plate 72 in a welding manner, the straight plate 72 is integrally rectangular, a locking notch 721 is formed in the end face, far away from the arc plate 71, of the straight plate 72, in the embodiment, the locking notch 721 is a locking notch, a clamping groove 722 is formed in the end face, far away from the first plane, of the straight plate 72, the clamping groove 722 is vertically arranged with the locking notch 721, the end plate 73 is a semicircular plate, the end plate 73 is fixedly welded to the end face, far away from the heat sealing roll 6, the locking assembly 74 is fixed on the first plane, when the straight plate 72 is attached to the first plane, the arc plate 71 and the semicircular notch, The arc plate 71 is adapted such that a portion of the locking assembly 74 passes through the locking notch 721 to lock the straight plate 72 to the first plane.
The locking assembly 74 includes: the fixing rod 741, the rotating block 742 and the spring 743 are both made of stainless steel, the fixing rod 741 and the rotating block 742 are welded and fixed on a first plane, a flange is integrally arranged at the end, away from the first plane, of the fixing rod 741, a rotating hole is formed in the rotating block 742, the fixing rod 741 penetrates through the rotating hole, the rotating hole is matched with the flange, a baffle ring is welded on the rotating hole, the inner diameter of the baffle ring is equal to the diameter of the fixing rod 741, the baffle ring is flush with the surface of the rotating block 742, the rotating block 742 is away from the first plane and is provided with a pull ring 744, the spring 743 is arranged between the baffle ring and the flange and used for driving the rotating block 742 to be close to the first plane, the rotating block 742 can penetrate through the locking notch 721 in a vertical state, and the rotating block 742 is clamped and embedded.
The implementation principle of the embodiment is as follows: when the heat sealing roller 6 needs to be disassembled and assembled, the pull ring 744 is pulled to enable the rotating block 742 to be separated from the clamping groove 722, the rotating block 742 is rotated to be in a vertical state, the fasteners 7 are rotated, the heat sealing roller 6 is slid along the axis of the round shaft 62 to be far away from the transmission shaft 5, the heat sealing roller 6 is taken down, and then the replaced heat sealing roller 6 is installed.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. An ultrasonic heat sealing machine comprising: operation panel (1), body (2), foot switch (3), body (2) are installed on operation panel (1), foot switch (3) are placed subaerial in order to be used for control body (2) work, its characterized in that, this ultrasonic heat-sealing machine still includes: the mounting seat (4) is arranged at the bottom of one end of the body (2), the bottom of the other end of the body (2) is fixedly arranged on the upper surface of the operating platform (1), the body (2) is of a door-shaped structure, the mounting seat (4) is detachably provided with a heat sealing roller (6),
the both ends of heat seal roller (6) are provided with square shaft (61) and circle axle (62), be provided with transmission shaft (5) that a level was arranged in mount pad (4), transmission shaft (5) are rotated through the drive assembly drive, square shaft (61) with the removable grafting assembly of tip of transmission shaft (5), mount pad (4) are kept away from one side of transmission shaft (5) is provided with semicircular notch (431), circle axle (62) place in semicircular notch (431), just heat seal roller (6) transmission shaft (5) semicircular notch (431) coaxial line is arranged, mount pad (4) are provided with buckling piece (7), buckling piece (7) will circle axle (62) restriction is fixed just do not influence in semicircular notch (431) circle axle (62) free rotation.
2. Ultrasonic heat-sealing machine according to claim 1, characterized in that said mounting seat (4) comprises: go up roof (41), left otic placode (43), right otic placode (42), it fixes to go up roof (41) level body (2) one end bottom, the up end fixed mounting of right otic placode (42) is in go up the lower terminal surface of roof (41), the up end fixed mounting of left otic placode (43) is in go up the lower terminal surface of roof (41), right otic placode (42) left otic placode (43) are parallel to each other, the mounting hole has been seted up to right otic placode (42) side, the installation in the mounting hole transmission shaft (5), semicircular notch (431) are located on the left otic placode (43).
3. An ultrasonic heat-sealing machine as claimed in claim 2, wherein said driving assembly comprises: driving motor, first sprocket, second sprocket (52), chain (53), driving motor fixes in body (2), first sprocket is established on driving motor's the output shaft, second sprocket (52) are established on transmission shaft (5), chain (53) cover is established first sprocket with just transmission assembly between second sprocket (52), rectangular hole (411) have been seted up in last roof (41), chain (53) pass rectangular hole (411).
4. Ultrasonic heat-sealing machine according to claim 2, characterized in that said semicircular notch (431) is defined in said left ear plate (43) by a first plane, said fastener (7) comprising: an arc plate (71), a straight plate (72), an end plate (73) and a locking component (74), one end of the arc plate (71) is rotationally connected with the first plane, and the rotation axis is horizontally arranged, the other end of the arc plate (71) is fixedly connected with the straight plate (72), a locking notch (721) is arranged on the end surface of the straight plate (72) far away from the arc plate (71), the end panel (73) is a semicircular plate, the end panel (73) is fixed on the side end face of the arc plate (71) far away from the heat-sealing roller (6), a locking assembly (74) is fixed on the first plane, when the straight plate (72) is jointed with the first plane, the arc plate (71) and the semicircular notch (431) form a circular hole, part of the locking assembly (74) passes through the locking notch (721) to lock the straight plate (72) on the first plane.
5. An ultrasonic heat-sealing machine as claimed in claim 4, characterized in that said locking assembly (74) comprises: the fixing rod (741), the rotating block (742) and the spring (743), the fixing rod (741) is fixed on the first plane, a flange is integrally arranged at the end, far away from the first plane, of the fixing rod (741), a rotating hole is formed in the rotating block (742), the fixing rod (741) penetrates through the rotating hole, the rotating hole is matched with the flange, a baffle ring is arranged in the rotating hole, the inner diameter of the baffle ring is equal to the diameter of the fixing rod (741), the spring (743) is arranged between the baffle ring and the flange and used for driving the rotating block (742) to be close to the first plane, the rotating block (742) can penetrate through the locking notch (721) in a vertical state, and the rotating block (742) presses the straight plate (72) when rotating to a horizontal state.
6. An ultrasonic heat-sealing machine according to claim 5, characterized in that the turning block (742) is provided with a pull ring (744) away from the first plane.
7. The ultrasonic heat-sealing machine according to claim 5, characterized in that the end face of the straight plate (72) away from the first plane is provided with a snap groove (722), the snap groove (722) is perpendicular to the locking notch (721), and the snap groove (722) is fittingly engaged with the rotating block (742).
8. An ultrasonic heat-sealing machine according to claim 4, characterized in that said circular shaft (62) is equipped with a bearing (621), said bearing (621) being adapted to said semicircular notch (431) and said arc plate (71).
CN202021066277.1U 2020-06-10 2020-06-10 Ultrasonic heat sealing machine Expired - Fee Related CN212888978U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021066277.1U CN212888978U (en) 2020-06-10 2020-06-10 Ultrasonic heat sealing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021066277.1U CN212888978U (en) 2020-06-10 2020-06-10 Ultrasonic heat sealing machine

Publications (1)

Publication Number Publication Date
CN212888978U true CN212888978U (en) 2021-04-06

Family

ID=75276526

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021066277.1U Expired - Fee Related CN212888978U (en) 2020-06-10 2020-06-10 Ultrasonic heat sealing machine

Country Status (1)

Country Link
CN (1) CN212888978U (en)

Similar Documents

Publication Publication Date Title
CN102848296A (en) Cup body polisher
CN212888978U (en) Ultrasonic heat sealing machine
CN202388200U (en) Variable frequency automatic assembly device for electrical appliance connector
CN205566045U (en) Two apparent coiling machines of plastic rotor
CN2592352Y (en) Dust collecting apparatus for band saw
CN211288206U (en) Connecting structure of mechanical oil pump for tooth type compressor
CN212189960U (en) Municipal works construction is with high-efficient screening sand device
CN111730531A (en) Wrench for steel bar connecting sleeve
CN2798596Y (en) Portable food frying machine
CN202763647U (en) Cup body polisher
CN214560556U (en) Elastic connector dismounting tool for demolishing house
CN105680643A (en) Dual-display winding machine of shaping rotor
CN202658414U (en) Embroidery machine with driving device arranged on left side of thread-hooking machine
CN217313298U (en) Granulation rotary drum mechanism of improved generation granulator
CN217165886U (en) Pump case welding bead flattening device
CN112715981B (en) Vegetable peeling device adjusted according to different vegetable hardness
CN220922077U (en) Quick positioning and fixing tool for crankcase machining
CN219925032U (en) Welding positioning assembly for electromechanical installation
CN214418158U (en) Aluminum skin slotting cutter with rotary polishing function
CN219530371U (en) Liquid crystal display splicing structure
CN107350678A (en) The turning device of weld jig
CN217563415U (en) Low-speed direct-drive permanent magnet synchronous motor
CN218146580U (en) Activation appearance of convenient dismantlement is used to liquid
CN211053353U (en) Special-shaped wood board polishing device
CN218312613U (en) Control box production and processing equipment

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210406

CF01 Termination of patent right due to non-payment of annual fee