CN203960659U - A kind of blind slot single-chamber vacuum pressure roller - Google Patents
A kind of blind slot single-chamber vacuum pressure roller Download PDFInfo
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- CN203960659U CN203960659U CN201420311293.0U CN201420311293U CN203960659U CN 203960659 U CN203960659 U CN 203960659U CN 201420311293 U CN201420311293 U CN 201420311293U CN 203960659 U CN203960659 U CN 203960659U
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- blind slot
- case head
- behaviour
- hole
- liners
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Abstract
The utility model discloses a kind of blind slot single-chamber vacuum pressure roller, comprise body layer, liners, through hole, blind slot, vacuum tank, behaviour's side case head, suction inlet seat, turbine and worm, behaviour's side bearing, pass side case head, pass side bearing, case head bearing, panel; Described roll body is cylinder-like structure, body layer and liners, consists of, and in described body layer He on described liners, is provided with through hole; On described liners, be provided with blind slot, described blind slot is arranged between described through hole; Described through hole and described blind slot interval evenly configure, and are covered with described roll body surface; Described blind slot top is rectangle slotted eye, and described blind slot bottom surface is arcuation bottom surface, forms the blind slot two dark structures in the shallow centre of end; This novel optimizing structure, and by roll body layer and liners, through hole and blind slot being set, improve water separation capability, and then promote the aridity of finished paper, further increase paper machine speed, enhance productivity.
Description
Technical field
The utility model relates to a kind of papermaking equipment press section technical equipment field, particularly a kind of blind slot single-chamber vacuum pressure roller.
Background technology
The major function of press section of a paper machine is dehydration, solidifies page, improves page characteristic simultaneously, improves wet web strength to improve the drying capacity of drying section.Suction press roll is to realize the key equipment of press section major function, and Modern Paper Machine, due to the higher speed of a motor vehicle, is all used suction press roll, and suction press roll can improve dewatering efficiency, improves the quality of page, reduce the adverse effect that squeezing paper feeding industry is brought.The main feature of suction press roll is on roller shell, to have the through hole that a lot of diameters are less, and through hole is by liners and body layer, and during work, roller shell inner chamber maintains lasting vacuum.When page and blanket net enter the nip of pressure roller and suction press roll, the water in page proceeds to blanket net; During water saturation in blanket net, under pull of vacuum effect, water is discharged from blanket net, enters through hole, discharges after importing roller shell inner chamber.The effect of vacuum furnace inner chamber vacuum is: force the moisture that nip is extruded to pass blanket net, the through hole on vacuum furnace, enters roller shell inner chamber.This process need regular hour, the vacuum of vacuum furnace region of no pressure is higher, and this time is shorter, just has more moisture to be sucked out within the identical time, and page dehydration is just more, and namely the water separation capability of vacuum furnace is stronger.
In prior art, the dehydration of press section of a paper machine is improved on suction press roll surface by blind hole is set, thereby effectively eliminates embossing phenomenon, improves the water separation capability of vacuum furnace, its shortcoming is: be conventionally designed with blind hole and be circular hole, diameter is little, and the perforate degree of depth is all positioned at liners, and can not have influence on the intensity of body layer, although small diameter circular blind hole has certain dehydration, because aperture is little, air is left in inside, contained air, while entering nip, the air in blind hole can hinder entering of water, affects the water capacity of blind hole, further affects the dewatering efficiency of blind hole, while leaving nip, in blind hole, air can return to normal pressure, thereby can promote the discharge of moisture in blind hole, but the operation along with suction press roll, in blind hole, experience is carried out repeatedly to moisture enters and discharge process, therefore, blind hole is forced to moistening, and water-filling is inevitable, once air is substituted by moisture in blind hole, in described blind hole, will retain the moisture of part, blind hole to moisture siphonage under, even the centrifugal action through suction press roll, can be by the whole moisture emptyings in blind hole yet, thereby have influence on the water capacity of circular blind hole, directly affect the dewatering efficiency of suction press roll, thereby make the aridity of finished paper not high, restricting the raising of paper machine speed.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of blind slot single-chamber vacuum pressure roller, for deficiency of the prior art, optimize the structure of suction press roll, and by through hole and blind slot being set in body layer and liners, improve roll body surface percent opening, by blind slot structural design, overcome the shortcoming that in prior art, blind hole exists, promote the percent opening of liners, can not affect again the stiffness of body layer; Simultaneously, because blind slot is long trough, and vertical setting of nip direction of blind slot fluting direction and suction press roll, fundamentally having solved air in groove retains and the compressed problem of air, because blind slot is consistent with suction press roll direction of rotation, described blind slot is more easily discharged the appearance water in groove under the centrifugal force of roll body, improves the water separation capability of press section, and then the aridity of lifting finished paper, further promote paper machine speed.
For achieving the above object, the technical solution of the utility model is as follows: a kind of blind slot single-chamber vacuum pressure roller, be called for short pressure roller, comprise body layer, liners, through hole, blind slot, vacuum tank, sealing strip, supporting seat, push boat, oil filler point, behaviour's side case head, suction inlet seat, suction mouth, turbine and worm, behaviour's side labyrinth ring, pass side labyrinth ring, behaviour's side bearing, pass side case head, power transmission shaft, biography side bearing, flat key, case head bearing, sparge pipe, amplitude adjusted, pneumatic tyre Pressure gauge, panel, screen cloth, case head axle and amplitude adjusted frame, it is characterized in that:
Described pressure roller left end is fore side, and right-hand member is transmission side, and centre is roll body, in described roll body, is provided with vacuum tank; Described roll body is cylinder-like structure, body layer and liners, consist of, in described body layer He on described liners, be provided with through hole, described through hole radially arranges along roll body, and be uniformly distributed on body layer and liners, described through hole is through described body layer and liners; On described liners, be provided with blind slot, described blind slot is arranged between described through hole, and the width of described blind slot is less than the diameter of described through hole, and is uniformly distributed on described liners; Described through hole and described blind slot interval evenly configure, and are covered with described roll body surface; Described blind slot top is rectangle slotted eye, described blind slot bottom surface is arcuation bottom surface, form the blind slot two dark structures in the shallow centre of end, greatly reduced the tension force of described liners blind slot internal water accumulation, when screen cloth enters after nip, described blind slot is more prone to entering of water, at screen cloth, leaves after nip, described blind slot more easily throws away inner ponding by centrifugal force, thereby increases appearance water rate and the dehydrating effect of liners.
Described through hole shifts to install between adjacent two exhausting holes of roll body circumferencial direction, between the through hole that identical contour is arranged, is provided with blind slot, therefore, between adjacent two row's blind slots, naturally also shifts to install.
The length direction of described blind slot and the direction of rotation of described suction press roll be arranged in parallel, also perpendicular with roll body nip direction; In described blind slot, depth capacity is less than described liners thickness.
Described through-hole aperture is 4-8mm; The width of described blind slot is 2m-6mm; The length of described blind slot is 8mm-50mm; Described blind slot bottom surface is arc, and its depth capacity is less than described liners thickness.
Due to the strip shape lower arcuate surface design of described blind slot, make to hold the easy tank of the water capacity at nip and enter, while leaving nip, under centrifugal action, the thorough emptying of Rong Shuike in blind slot, guarantees the effect performance of blind slot to roll body dehydration rate, has also guaranteed the dewatering efficiency of suction press roll.
Described vacuum tank consists of metal cabinet, and one end of described vacuum tank is fixedly connected with described behaviour's side case head, and the other end is provided with case head axle, and connects by case head bearing and described biography side case headgear; Between described vacuum tank and described body layer inner side, be provided with sealing strip, described sealing strip is set to four sections, and forms circular arc vacuum dehydration region, and described sealing strip is connected described vacuum tank with described body layer inner seal; Described sealing strip is arranged with pneumatic tyre, by controlling the pressure in described pneumatic tyre, controls the sealing effectiveness of described sealing strip; Between described vacuum tank bottom and described body layer inner side, be provided with push boat, described vacuum tank inside is provided with amplitude adjusted frame and sparge pipe, and described amplitude adjusted frame can stretch by bilateral, for the dehydration peak width adjusting of vacuum tank.
Described transmission side is provided with power transmission shaft, and described power transmission shaft is rotating shaft, and described power transmission shaft is fixedly connected with by flat key with driving motor; Described biography side case head and described roll body are spirally connected fixing; Described biography side case head and described roll body synchronous rotary, the outside socket of described biography side case head is provided with biography side bearing, described biography side bearing two limits are provided with and pass side labyrinth ring, and carry out dual face seals by passing side labyrinth ring, and described biography side bearing below is fixedly connected with supporting seat; The inner side socket of described biography side case head is provided with case head bearing, the case head axle socket on described case head bearing and described vacuum tank.
Described fore side is provided with behaviour's side case head, described behaviour's side case head is provided with behaviour's side bearing, described behaviour's side case head is socketed by behaviour's side bearing and described roll body, described behaviour's side bearing two limits are provided with behaviour's side labyrinth ring, and carry out dual face seals by behaviour's side labyrinth ring, described behaviour's side case head below is provided with suction inlet seat, in described suction inlet seat, is provided with suction mouth, and described suction mouth is communicated with described vacuum tank; Described fore side end face is provided with panel, on described panel, be provided with sparge pipe, amplitude adjusted, pneumatic tyre Pressure gauge, vacuum meter, described behaviour's side case head top is provided with turbine and worm, described turbine and worm is for regulating the angle of described vacuum tank, and then the radial angle in adjusting vacuum tank dehydration region; Described amplitude adjusted is controlled the amplitude adjusted frame in described vacuum tank, for regulating the dehydration peak width of described vacuum tank.
Described biography side case head and roll body, under power transmission shaft drives, are done synchronous rotary motion in the biography side bearing in described supporting seat, described roll body one end is socketed on outside described behaviour's side bearing, and the other end is socketed by passing side case head and described case head bearing; Described behaviour's side case head, vacuum tank, suction inlet seat are fixed and are not rotated, and described vacuum tank is dynamically connected by the described sealing strip in its outside and the body layer medial surface sealed sliding of described push boat and rotation; Described biography side bearing, behaviour's side bearing, case head bearing are provided with oil filler point, for the lubrication protection to biography side bearing, behaviour's side bearing, case head bearing.
Pass through technique scheme, the beneficial effect of technical solutions of the utility model is: the structure of optimizing suction press roll, and by through hole being set in body layer, at liners, blind slot is set, improve roll body surface percent opening, blind slot structural design at the bottom of employing long trough and inner arc, and by slot vertical setting of nip direction of direction and suction press roll of blind slot, fundamentally having solved air in groove retains and the compressed problem of air, because blind slot is consistent with suction press roll direction of rotation, described blind slot is more easily discharged the appearance water in groove under the centrifugal force of roll body, improve the water separation capability of press section, and then the aridity of lifting finished paper, further promote paper machine speed.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed a kind of blind slot single-chamber vacuum pressure roller structural representation of the utility model embodiment;
Fig. 2 is that the disclosed a kind of blind slot single-chamber vacuum pressure roller A of the utility model embodiment is to view schematic diagram;
Fig. 3 is that the disclosed a kind of blind slot single-chamber vacuum pressure roller B-B of the utility model embodiment is to schematic diagram;
Fig. 4 is the disclosed a kind of blind slot single-chamber vacuum pressure roller roll surface blind slot through hole schematic diagram of the utility model embodiment, and wherein Fig. 4 a is blind slot through hole distribution map, and Fig. 4 b is that blind slot through hole C-C is to profile.
Numeral and the represented corresponding component title of letter in figure:
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
According to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model provides a kind of blind slot single-chamber vacuum pressure roller, comprise body layer 1, liners 2, through hole 3, blind slot 4, vacuum tank 5, sealing strip 6, supporting seat 7, push boat 8, oil filler point 9, behaviour's side case head 10, suction inlet seat 11, suction mouth 12, turbine and worm 13, behaviour's side labyrinth ring 14, pass side labyrinth ring 15, behaviour's side bearing 16, pass side case head 17, power transmission shaft 18, pass side bearing 19, flat key 20, case head bearing 21, sparge pipe 22, amplitude adjusted 23, pneumatic tyre Pressure gauge 24, panel 25, screen cloth 26, case head axle 27 and amplitude adjusted frame 28.
Described pressure roller left end is fore side, and right-hand member is transmission side, and centre is roll body, is provided with vacuum tank 5 in described roll body; Described roll body is cylinder-like structure, body layer 1 and liners 2, consist of, in described body layer 1 He on described liners 2, be provided with through hole 3, described through hole 3 radially arranges along roll body, and be uniformly distributed on body layer 1 and liners 2, described through hole 3 is through described body layer 1 and liners 2; On described liners 2, be provided with blind slot 4, described blind slot 4 is arranged between described through hole 3, and the width of described blind slot 4 is less than the diameter of described through hole 3, and is uniformly distributed on described liners 2; Described through hole 3 evenly configures with described blind slot 4 intervals, and is covered with described roll body surface; Described blind slot 4 tops are rectangle slotted eye, described blind slot 4 bottom surfaces are arcuation bottom surface, form the blind slot 4 two dark structures in the shallow centre of end, greatly reduced the tension force of described liners 2 blind slot 4 internal water accumulations, when screen cloth 26 enters after nip, described blind slot 4 is more prone to entering of water, at screen cloth 26, leaves after nip, described blind slot 4 more easily throws away inner ponding by centrifugal force, thereby increases appearance water rate and the dehydrating effect of liners 2.
Described through hole 3 shifts to install between adjacent two exhausting holes 3 of roll body circumferencial direction, between the through hole 3 that identical contour is arranged, is provided with blind slot 4, therefore, between adjacent two row's blind slots 4, naturally also shifts to install.
The length direction of described blind slot 4 and the direction of rotation of described suction press roll be arranged in parallel, also perpendicular with roll body nip direction; The interior depth capacity of described blind slot 4 is less than described liners thickness.
Described through hole 3 apertures are 4mm; The width of described blind slot 4 is 3mm; The length of described blind slot 4 is 12mm; Described blind slot 4 bottom surfaces are arc, and its depth capacity is less than described liners thickness.
Due to the strip shape lower arcuate surface design of described blind slot 4, make to hold the easy tank of the water capacity at nip and enter, while leaving nip, under centrifugal action, the thorough emptying of Rong Shuike in blind slot 4, guarantees the effect performance of 4 pairs of roll body dehydration rates of blind slot, has also guaranteed the dewatering efficiency of suction press roll.
Described vacuum tank 5 consists of metal cabinet, and one end of described vacuum tank 5 is fixedly connected with described behaviour's side case head 10, and the other end is provided with case head axle 27, and by case head bearing 21 and described biography side case head 17 sockets; Between described vacuum tank 5 and described body layer 1 inner side, be provided with sealing strip 6, described sealing strip 6 is set to four sections, and forms circular arc vacuum dehydration region, and described sealing strip 6 is connected described vacuum tank 5 with described body layer 1 inner seal; Described sealing strip 6 is arranged with pneumatic tyre, by controlling the pressure in described pneumatic tyre, controls the sealing effectiveness of described sealing strip 6; Between described vacuum tank 5 bottoms and described body layer 1 inner side, be provided with push boat 8, described vacuum tank 5 inside are provided with amplitude adjusted frame 28 and sparge pipe 22, and described amplitude adjusted frame 28 can stretch by bilateral, for the dehydration peak width adjusting of vacuum tank 5.
Described transmission side is provided with power transmission shaft 18, and described power transmission shaft 18 is rotating shaft, and described power transmission shaft 18 is fixedly connected with by flat key 20 with driving motor; Described biography side case head 17 is spirally connected fixing with described roll body; Described biography side case head 17 and described roll body synchronous rotary, described biography side case head 17 outside sockets are provided with and pass side bearing 19, described biography side bearing 19 2 limits are provided with and pass side labyrinth ring 15, and carry out dual face seals by passing side labyrinth ring 15, and described biography side bearing 19 belows are fixedly connected with supporting seat 7; Described biography side case head 17 inner side sockets are provided with case head bearing 21, and described case head bearing 21 is socketed with the case head axle 27 on described vacuum tank 5.
Described fore side is provided with behaviour's side case head 10, described behaviour's side case head 10 is provided with behaviour's side bearing 16, described behaviour's side case head 10 is socketed with described roll body by behaviour's side bearing 16, described behaviour's side bearing 16 2 limits are provided with behaviour's side labyrinth ring 14, and carry out dual face seals by behaviour's side labyrinth ring 14, described behaviour's side case head 10 belows are provided with suction inlet seat 11, in described suction inlet seat 11, are provided with suction mouth 12, and described suction mouth 12 is communicated with described vacuum tank 5; Described fore side end face is provided with panel 25, on described panel 25, be provided with sparge pipe 22, amplitude adjusted 23, pneumatic tyre Pressure gauge 24, vacuum meter, described behaviour's side case head 10 tops are provided with turbine and worm 13, described turbine and worm 13 is for regulating the angle of described vacuum tank 5, and then the radial angle in adjusting vacuum tank 5 dehydration regions; The amplitude adjusted frame 28 that described amplitude adjusted 23 is controlled in described vacuum tank 5, for regulating the dehydration peak width of described vacuum tank 5.
Described biography side case head 17 is with roll body under power transmission shaft drives, and the interior synchronous rotary of doing of biography side bearing 19 in described supporting seat 7 moves, and described roll body one end is socketed on outside described behaviour's side bearing 16, and the other end is by passing side case head 17 and described case head bearing 21 sockets; Described behaviour's side case head 10, vacuum tank 5, suction inlet seat 11 are fixed and are not rotated, and described vacuum tank 5 is dynamically connected with the body layer 1 medial surface sealed sliding of rotation by described sealing strip 6 and the described push boat 8 in its outside; Described biography side bearing 19, behaviour's side bearing 16, case head bearing 21 are provided with oil filler point 9, for the lubrication protection to biography side bearing 19, behaviour's side bearing 16, case head bearing 21.
By above-mentioned specific embodiment, the beneficial effects of the utility model are: the structure of optimizing suction press roll, and by through hole being set in body layer, at liners, blind slot is set, improve roll body surface percent opening, blind slot structural design at the bottom of employing long trough and inner arc, and by slot vertical setting of nip direction of direction and suction press roll of blind slot, fundamentally having solved air in groove retains and the compressed problem of air, because blind slot is consistent with suction press roll direction of rotation, described blind slot is more easily discharged the appearance water in groove under the centrifugal force of roll body, improve the water separation capability of press section, and then the aridity of lifting finished paper, further promote paper machine speed.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. blind slot single-chamber vacuum pressure roller, it is characterized in that, comprise body layer, liners, through hole, blind slot, vacuum tank, sealing strip, supporting seat, push boat, oil filler point, behaviour's side case head, suction inlet seat, suction mouth, turbine and worm, behaviour's side labyrinth ring, pass side labyrinth ring, behaviour's side bearing, pass side case head, power transmission shaft, biography side bearing, flat key, case head bearing, sparge pipe, amplitude adjusted, pneumatic tyre Pressure gauge, panel, screen cloth, case head axle and amplitude adjusted frame; Described pressure roller left end is fore side, and right-hand member is transmission side, and centre is roll body, in described roll body, is provided with vacuum tank; Described roll body is cylinder-like structure, body layer and liners, consist of, in described body layer He on described liners, be provided with through hole, described through hole radially arranges along roll body, and be uniformly distributed on body layer and liners, described through hole is through described body layer and liners; On described liners, be provided with blind slot, described blind slot is arranged between described through hole, and the width of described blind slot is less than the diameter of described through hole, and is uniformly distributed on described liners; Described through hole and described blind slot interval evenly configure, and are covered with described roll body surface; Described blind slot top is rectangle slotted eye, and described blind slot bottom surface is arcuation bottom surface, forms the blind slot two dark structures in the shallow centre of end.
2. a kind of blind slot single-chamber vacuum pressure roller according to claim 1, it is characterized in that, described through hole shifts to install between adjacent two exhausting holes of roll body circumferencial direction, between the through hole that identical contour is arranged, is provided with blind slot, between adjacent two row's blind slots, shifts to install.
3. a kind of blind slot single-chamber vacuum pressure roller according to claim 1, is characterized in that, the length direction of described blind slot and the direction of rotation of described suction press roll be arranged in parallel, also perpendicular with roll body nip direction; In described blind slot, depth capacity is less than described liners thickness; Described through-hole aperture is 4-8mm; The width of described blind slot is 2m-6mm; The length of described blind slot is 8mm-50mm.
4. a kind of blind slot single-chamber vacuum pressure roller according to claim 1, it is characterized in that, described vacuum tank consists of metal cabinet, and described vacuum tank one end is fixedly connected with described behaviour's side case head, the other end is provided with case head axle, and connects by case head bearing and described biography side case headgear; Between described vacuum tank and described body layer inner side, be provided with sealing strip, described sealing strip is set to four sections, and forms circular arc vacuum dehydration region, and described sealing strip is connected described vacuum tank with described body layer inner seal; Described sealing strip is arranged with pneumatic tyre, by controlling the pressure in described pneumatic tyre, controls the sealing effectiveness of described sealing strip; Between described vacuum tank bottom and described body layer inner side, be provided with push boat, described vacuum tank inside is provided with amplitude adjusted frame and sparge pipe, and described amplitude adjusted frame can stretch by bilateral.
5. a kind of blind slot single-chamber vacuum pressure roller according to claim 1, is characterized in that, described transmission side is provided with power transmission shaft, and described power transmission shaft is rotating shaft, and described power transmission shaft is fixedly connected with by flat key with driving motor; Described biography side case head and described roll body are spirally connected fixing; Described biography side case head and described roll body synchronous rotary, the outside socket of described biography side case head is provided with biography side bearing, described biography side bearing two limits are provided with and pass side labyrinth ring, and carry out dual face seals by passing side labyrinth ring, and described biography side bearing below is fixedly connected with supporting seat; The inner side socket of described biography side case head is provided with case head bearing, the case head axle socket on described case head bearing and described vacuum tank.
6. a kind of blind slot single-chamber vacuum pressure roller according to claim 1, it is characterized in that, described fore side is provided with behaviour's side case head, described behaviour's side case head is provided with behaviour's side bearing, and described behaviour's side case head is socketed by behaviour's side bearing and described roll body, and described behaviour's side bearing two limits are provided with behaviour's side labyrinth ring, and carry out dual face seals by behaviour's side labyrinth ring, described behaviour's side case head below is provided with suction inlet seat, in described suction inlet seat, is provided with suction mouth, and described suction mouth is communicated with described vacuum tank; Described fore side end face is provided with panel, is provided with sparge pipe, amplitude adjusted, pneumatic tyre Pressure gauge, vacuum meter on described panel, and described behaviour's side case head top is provided with turbine and worm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311293.0U CN203960659U (en) | 2014-06-11 | 2014-06-11 | A kind of blind slot single-chamber vacuum pressure roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311293.0U CN203960659U (en) | 2014-06-11 | 2014-06-11 | A kind of blind slot single-chamber vacuum pressure roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203960659U true CN203960659U (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420311293.0U Expired - Fee Related CN203960659U (en) | 2014-06-11 | 2014-06-11 | A kind of blind slot single-chamber vacuum pressure roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203960659U (en) |
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2014
- 2014-06-11 CN CN201420311293.0U patent/CN203960659U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20160611 |
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| CF01 | Termination of patent right due to non-payment of annual fee |