CN113906177A - Rotary drum box of sewing machine - Google Patents
Rotary drum box of sewing machine Download PDFInfo
- Publication number
- CN113906177A CN113906177A CN202080039629.0A CN202080039629A CN113906177A CN 113906177 A CN113906177 A CN 113906177A CN 202080039629 A CN202080039629 A CN 202080039629A CN 113906177 A CN113906177 A CN 113906177A
- Authority
- CN
- China
- Prior art keywords
- thread
- bobbin
- bobbin thread
- box
- sewing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 29
- 230000002265 prevention Effects 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
- D05B57/143—Vertical axis type
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/18—Shuttles with bobbin casings held by removable caps
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
- D05B57/265—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices for looptakers with vertical axis
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/28—Applications of bobbins for storing the lower thread
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a sewing machine drum box, wherein a drum shell with a thread-off preventing end is connected to the periphery of a bottom thread box (30) so as to install a bottom thread (A) supplied from the center.
Description
Technical Field
The present invention relates to a sewing machine drum box, and more particularly, to a sewing machine drum box in which a bobbin thread drawing path is provided in a bobbin case so that a bobbin thread released from a central portion can be easily installed, so that an administrator can easily manage the sewing machine drum box in which a large number of sewing machines are installed.
Background
Generally, a drum box is provided with an outer bobbin case, an inner bobbin case placed on the outer bobbin case and rotated, and a bobbin case. Further, the outer bobbin case is rotated by being connected to a rotation shaft at a lower portion, and the inner bobbin case is rotatably mounted with respect to the outer bobbin case.
And, the bobbin case is detachably installed to cover the front of the inner bobbin case, and the bobbin having the bobbin thread wound inside is received or the bobbin thread wound in a cylindrical shape is directly received in the bobbin case and installed in the inner bobbin case of the sewing machine. On the other hand, the inner bobbin case is normally controlled to rotate by a bobbin case stopper member mounted on the needle plate.
As a related art, korean patent registration No. 10-1010835 (registration date 2011, 1/18) discloses a "drum box for a sewing machine".
A related art drum box (10) for a sewing machine includes an outer bobbin case which rotates in one direction below a needle plate 5 mounted on a bed 1 and has a hook tip extending in the rotation direction on a part of an outer periphery, an inner bobbin case and a bobbin case which are mounted so as to be rotatable with respect to a front portion of the outer bobbin case, a slope for sliding a thread is formed on the outer periphery of the outer bobbin case continuous with a base of the hook tip so as to be inclined toward a front surface of the bobbin case, and a loop of an upper thread held by the hook tip slides on the slope for sliding the thread so as to pass through the front surface of the bobbin case by the rotation of the outer bobbin case.
The radius of the outer bobbin case at the formation portion of the thread sliding slope is larger than the radius of the outer bobbin case at the formation portion of the thread sliding slope opposite to the rotation axis of the outer bobbin case.
And a wire-moving slope inclined in the same direction as the wire-sliding slope is provided at a portion opposite to the hook tip of the wire-sliding slope,
an inclination angle of a rotation axis of the outer bobbin case with respect to the thread moving slope is greater than an inclination angle of the rotation axis of the thread sliding slope.
However, in the prior art, since a separate mounting shaft to which the bobbin case is mounted is provided inside the inner bobbin case, the amount of bobbin thread wound on the bobbin is reduced as compared with bobbin thread wound without bobbin, and in a sewing machine operating in large quantities, there is a problem in that the bobbin thread must be frequently replaced.
In addition, the prior art has a problem in that it is difficult to draw the bobbin thread from the bobbin before drawing the bobbin thread to the upper portion of the needle plate 5, and thus it takes much time to replace the bobbin thread.
Disclosure of Invention
Technical problem to be solved
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a drum case in which a bobbin thread drawn out from the center is mounted on a bobbin case, a bobbin thread drawing hole and a bobbin thread drawing hole passage are formed in the bobbin case, so that the bobbin thread can be easily drawn out from an upper plate of a sewing machine, and a bobbin thread hanging end bent inward is provided at one end of a drum case, so that a large amount of replacement bobbin threads can be easily managed.
Technical scheme
In order to achieve the above object, a sewing machine drum box according to the present invention includes: a hook body to which the driving shaft is connected to the lower surface and rotates; a bobbin thread base coupled to an inner circumference of the hook body so as to rotate in a direction opposite to the hook body when the driving shaft rotates, and provided at an upper end of the main wall with a groove recessed in a lower direction; a bobbin case inserted in such a manner that an upper portion thereof is exposed to an inner side of the bobbin base so as to be wrapped around an upper portion and a side surface of a bobbin thread drawn out from a center,
the bottom line box includes: a protrusion protruded by an elastic force so as to be inserted into the groove; a hook having one end connected to a hook connection hole formed in the protrusion, the protrusion being shifted in an inner side direction when the other end is lifted; a case having a protrusion introduction part at an upper side such that both sides of the protrusion are elastically supported after being inserted, and a lower side formed in a cylindrical shape with an opening so as to insert the bobbin thread; a drum shell, which is formed with a bobbin thread hanging end bent inward at one side end portion so as to be connected to one side of the outer circumference of the case body to guide the drawing-out of the bobbin thread,
a bobbin thread groove recessed inward is provided at one end of the protrusion introduction portion to be guided when the bobbin thread is drawn out.
The bottom line box is provided with a bottom line leading-out hole penetrating through the centers of the box body, the protrusion and the hook so as to lead out the bottom line, and the protrusion and the box body are provided with cut leading-out hole channels so as to communicate the bottom line leading-out hole with the outside.
The drum shell is provided with: a case fixing part extending from the bobbin thread hanging end and combined to the outer circumference of the case; and an elastic insertion part extending from the case fixing part and elastically and closely contacting the outer circumference of the lower thread case by elastic force, the elastic insertion part being provided with an anti-thread-off end bent inward to prevent the lower thread from being separated.
The anti-drop thread end is formed with an upper prevention end bent at an upper portion and a lower prevention end bent at a lower portion, so that the bobbin thread is drawn out from the center of the end portion, and the box body is provided with an end prevention groove of a through hole, so that the anti-drop thread end is recessed towards the inner side.
The bobbin thread holder is provided on one side of the upper surface of the case so as to be spirally rotated and extended, and the bobbin thread is drawn out after being recessed to the center.
Advantageous effects
As described above, the drum box for a sewing machine according to the present invention has the following effects.
First, a lower thread drawing hole for drawing a lower thread from a case body forming a lower thread case by penetrating the center of a protrusion and a hook and a drawing hole passage communicating with the lower thread drawing hole are provided, thereby easily drawing the lower thread drawn from the center.
Second, a bobbin thread groove is provided in the projection introduction part so that the bobbin thread drawn through the draw-out hole passage is placed on the upper surface of the box body, and when the bobbin thread is drawn out, the bobbin thread can be stably guided to prevent the bobbin thread from being tangled.
And thirdly, one end of the drum shell is provided with an inward bent bottom thread hanging end, and the other end of the drum shell is provided with an anti-drop thread end, so that the bottom thread led out through the bottom thread groove can be led out to an upper plate of the sewing machine more easily.
Fourth, by providing a bobbin thread holder formed in a pigtail shape on a case constituting the bobbin thread case, it is possible to maintain tension of the bobbin thread in a predetermined manner and stably draw out the bobbin thread by preventing malfunction.
Drawings
Fig. 1 is a view illustrating a drum box of a related art sewing machine.
Fig. 2 is an exploded perspective view of a drum box for a sewing machine according to the present invention.
Fig. 3 is a view for explaining a drum shell according to the present invention.
Figure 4 is a view showing the plane and side of the wallbox according to the invention,
fig. 5 is a view for explaining a state where a bobbin thread is drawn out from the bobbin thread case according to the present invention.
Detailed Description
The sewing machine rotary bookcase of the invention is explained in detail below with reference to the accompanying drawings.
As shown in fig. 2 to 5, the drum box for a sewing machine according to the present invention includes: a hook body 10 driving a shaft connected to a lower surface and rotating; a bobbin thread base 20 coupled to an inner circumference of the hook body 10 so as to rotate in a direction opposite to the hook body 10 when the driving shaft rotates, and provided at an upper end of a main wall with a groove 21 recessed in a lower direction; the bobbin case 30, the upper portion of which is exposed to the inside of the bobbin thread base 20, is inserted so as to be wrapped around the upper portion and the side of the bobbin thread a drawn out from the center, i.e., the bobbin thread a drawn out from the center, so that more bobbin thread a can be wound than if separate bobbin cores were provided.
Further, the bottom line box 30 includes: a protrusion 31 protruded by an elastic force so as to be inserted into the groove 21; a hook 32 having one end connected to a hook connection hole 31a formed in the protrusion 31, the protrusion 31 being shifted in an inner direction when the other end is lifted; a case 33 having a protrusion introduction part 33a at an upper side such that both sides of the protrusion 31 are elastically supported after being inserted, and a lower side formed in a cylindrical shape opened so as to insert the bobbin thread a; a drum shell 34 formed with a bobbin thread hooking end 34a bent inward at one side end portion so as to be coupled to one side of the outer circumference of the box body 33 to guide the drawing of the bobbin thread a.
When the hook 32 is lifted, the projection 31 is recessed inward to be inserted into the groove 21, and when the hook 32 is released, the projection 31 is protruded outward by spring force to be caught at an upper inner end of the groove 21.
A bobbin thread groove 33a' recessed inward is provided at one end of the protrusion drawing part 33a to be guided when drawing the bobbin thread a so that the bobbin thread a is stably drawn through the upper surface of the case 33.
On the other hand, a lower thread drawing hole 30a penetrating the center of the box body 33, the projection 31 and the hook 32 is provided at the lower thread box 30 so as to draw the lower thread a, and a cut drawing hole passage 30b is provided at the projection 31 and the box body 33 so that the lower thread drawing hole 30a communicates with the outside, so that the lower thread a is drawn out by being recessed into the lower thread groove 33a' through the lower portion of the hook 32.
The drum shell 34 includes: a case fixing portion 34b extending from the lower thread hanging end 34a and coupled to the outer periphery of the case 33; and an elastic insertion part 34c extending from the case fixing part 34b and elastically coming into close contact with the outer circumference of the bottom line case 30 by an elastic force, wherein the elastic insertion part 34c is provided with a thread escape prevention end 341 bent inward to prevent the bottom line a from separating. By raising the thread escape preventing end 341 of the drum shell 34, the bobbin thread a is drawn in a state of being recessed between the drum shell 34 and the box body 33.
At this time, an upper prevention end 341 'bent at the upper portion and a lower prevention end 341 ″ bent at the lower portion are formed at the escape preventing end 341 so that the bobbin thread a is drawn out from the center of the end portion, and an escape preventing end groove 33c of a through hole is provided on the case 33 so that the escape preventing end 341 is recessed toward the inside so that the bobbin thread a is drawn out through a space between the upper prevention end 341' and the lower prevention end 341 ″.
On the other hand, the lower thread holder 33b is provided on the upper surface side of the box body 33 to be spirally rotated and extended so that the lower thread a is drawn out after being recessed to the center, thereby preventing the upper thread and the lower thread a from being tangled with each other even if the hook body 10 is rapidly rotated.
The operation of the sewing machine drum box of the invention constituted by the above structure is as follows.
As shown in fig. 2 to 5, the sewing machine drum box of the present invention is accommodated in a bobbin thread case 30 inserted into a bobbin thread base 20 so that a bobbin thread a is wound and supplied from the center without a bobbin. The bobbin thread base 20 is placed inside the hook body 10 to rotate in the opposite direction to the hook body 10.
In addition, the bobbin thread a is wound more than the case of the bobbin using the central axis of the bobbin (not shown) and the space of the upper and lower plates as the winding space, so that the maintenance cost is reduced when a large number of sewing machines are operated.
Further, a lower thread drawing hole 30a is formed through the center of the upper surface of the lower thread case 30, and a cut drawing hole passage 30b is provided so that the lower thread drawing hole 30a communicates with a side surface, thereby easily drawing the lower thread a.
That is, the lower thread a drawn out from the center is drawn out from the side through the lower thread drawing-out hole 30a and the drawing-out hole passage 30b, recessed between the lower face of the hook 32 and the upper face of the projection 31. And, the bobbin thread a is drawn out from the drum shell 34 through the bobbin thread groove 33a' of the projection lead-in portion 33 a.
Also, the drum shell 34 is bolt-fixed to the outer circumference of the side of the box body 33 by a box body fixing portion 34b, and the bobbin thread a is drawn upward by a bobbin thread hooking end 34a and an elastic insertion portion 34 c. At this time, the escape preventing wire end 341 bent inward is provided at the end of the elastic insertion portion 34c, thereby preventing the bobbin thread a from being separated.
The bobbin thread a recessed between the drum shell 34 and the box body 33 is drawn out from the upper plate through the thread off preventing end 341 through the spiral bobbin thread holder 33b so that tension is maintained when drawn out from the upper plate of the sewing machine, thereby completing the mounting of the bobbin thread a.
As described above, in order to facilitate installation of the lower thread a supplied from the center in the drum case of the present invention, the lower thread can be quickly installed through the lower thread drawing hole 30a, the drawing hole passage 30b, the lower thread groove 33a', the lower thread hooking end 34a, the thread escape preventing end 341, and the lower thread holder 33b, so that it can be effectively managed with less manpower when applied to a large number of sewing machines, thereby improving the productivity.
The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by those skilled in the art without departing from the gist of the present invention claimed in the claims, which are within the scope of the claims.
In the drawings
10: hook, 20: bottom line base
21: groove, 30: bottom line box
30 a: bottom line lead-out hole, 30 b: lead-out hole channel
31: projection, 31 a: hook connecting hole
32: hook
33: cartridge, 33 a: protrusion lead-in part
33 a': bottom line groove, 33 b: bottom line holder
33 c: end-preventing groove
34: drum shell
34 a: bobbin thread hanging end, 34 b: box fixing part
34 c: elastic insertion portion, 341: anti-drop wire end
341': upper prevention end, 341 ": lower prevention end
A: a bottom line.
Claims (5)
1. A rotary drum box of a sewing machine is characterized by comprising: a hook body (10) which drives the shaft to rotate and is connected to the lower surface; a bobbin thread base (20) coupled to an inner circumference of the hook body (10) such that it rotates in a direction opposite to the hook body (10) when the driving shaft rotates, and provided with a groove (21) recessed in a lower direction at an upper end of a main wall; a bottom line case (30) inserted in such a manner that an upper portion thereof is exposed to an inner side of the bottom line base (20) as to be wrapped around an upper portion and a side surface of the bottom line (A) drawn out from a center,
the bottom box (30) includes: a protrusion (31) protruding by an elastic force so as to be insertable into the groove (21); a hook (32) having one end connected to a hook connection hole (31a) formed in the protrusion (31), the protrusion (31) being shifted in an inner side direction when the other end is lifted; a case (33) having a protrusion introduction part (33a) on an upper surface such that both sides of the protrusion (31) are elastically supported after being inserted, and a lower surface formed in a cylindrical shape opened so as to insert the bobbin thread (A); a drum shell (34) having a bobbin thread hanging end (34a) formed at one side end portion thereof to be bent inward so as to be connected to one side of the outer circumference of the box body (33) to guide the drawing of the bobbin thread (A),
a bobbin thread groove (33a') recessed inward is provided at one end of the protrusion introduction portion (33a) to be guided when the bobbin thread (A) is drawn out.
2. A drum box for a sewing machine according to claim 1, wherein a lower thread drawing hole (30a) penetrating the center of the box body (33), the projection (31) and the hook (32) is provided at the lower thread box (30) so as to draw out the lower thread (a), and a cut drawing hole passage (30b) is provided at the projection (31) and the box body (33) so that the lower thread drawing hole (30a) communicates with the outside.
3. A sewing machine drum box according to claim 1,
the drum shell (34) is provided with: a box body fixing part (34b) which extends from the bottom line hanging end (34a) and is combined with the periphery of the box body (33); an elastic insertion part (34c) extending from the case fixing part (34b) and elastically brought into close contact with the outer periphery of the bottom line case (30) by an elastic force,
a thread escape prevention end (341) is provided at the elastic insertion portion (34c) to be bent inward to prevent the bobbin thread (A) from being separated.
4. A sewing machine drum box according to claim 3,
an upper prevention end (341') bent at an upper portion and a lower prevention end (341 ") bent at a lower portion are formed at the thread escape preventing end (341) such that the bobbin thread (A) is drawn out from the center of the end portion,
and a through-hole end-preventing groove (33c) is formed in the box body (33) so that the end-preventing end (341) is recessed inward.
5. The sewing machine drum box according to claim 1, characterized in that a bobbin thread holder (33b) which is spirally rotated and extended is provided on the upper surface side of the box body (33) so that the bobbin thread (a) is drawn out after being recessed to the center portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190063097A KR102110940B1 (en) | 2019-05-29 | 2019-05-29 | Shuttle device for sewing machine |
| KR10-2019-0063097 | 2019-05-29 | ||
| PCT/KR2020/006614 WO2020242122A1 (en) | 2019-05-29 | 2020-05-21 | Rotary shuttle for sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113906177A true CN113906177A (en) | 2022-01-07 |
Family
ID=70736977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080039629.0A Pending CN113906177A (en) | 2019-05-29 | 2020-05-21 | Rotary drum box of sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20220220650A1 (en) |
| KR (1) | KR102110940B1 (en) |
| CN (1) | CN113906177A (en) |
| WO (1) | WO2020242122A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176325A (en) * | 1996-05-16 | 1998-03-18 | 重机公司 | Bobbin casing and under-thread bobbin for sewing machine |
| CN1189550A (en) * | 1997-01-29 | 1998-08-05 | 株式会社广濑制作所 | Rotary hook for sewing machiens |
| CN1470701A (en) * | 2002-07-11 | 2004-01-28 | 东海工业缝纫机株式会社 | Cop-latch cover |
| CN103097600A (en) * | 2010-08-25 | 2013-05-08 | 姜小大 | Lower thread supply device for sewing machine |
| CN106192242A (en) * | 2016-08-08 | 2016-12-07 | 东阳市太极精密制造有限公司 | Large Copacity sewing-machine rotating shuttle |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3347193A (en) * | 1965-07-30 | 1967-10-17 | Union Special Machine Co | Semi-dull finish bobbin case basket |
| DE2028371A1 (en) * | 1969-06-09 | 1971-02-04 | Watanabe, Kenµ, Shibata (Japan) | Bobbin case for sewing machines |
| US4434734A (en) * | 1981-02-18 | 1984-03-06 | The Singer Company | Anti-spill device for sewing machine bobbin |
| DE3911134A1 (en) * | 1989-04-06 | 1990-10-11 | Kochs Adler Ag | REVOLVING GRIPPER FOR DOUBLE-LOCKED STITCH SEWING MACHINES IN WHICH A CORELESS THREAD WINDING OR A REEL WINDED WITH A THREAD CAN BE STORED |
| DE4138402C1 (en) * | 1991-11-22 | 1992-11-26 | Duerkopp Adler Ag, 4800 Bielefeld, De | Feed dog for double lock-stitch machine - has thread tensioning element which is fastened on outside of a collar on a top bobbin and features a clamp and guide device |
| JPH10165682A (en) * | 1996-05-16 | 1998-06-23 | Juki Corp | Bobbin casing and looper thread bobbin in sewing machine |
| JP2960363B2 (en) * | 1997-01-18 | 1999-10-06 | 株式会社廣瀬製作所 | Bobbin case |
| KR20140028339A (en) * | 2012-08-28 | 2014-03-10 | 강소대 | Bobbin cap |
| US9797077B2 (en) * | 2015-02-09 | 2017-10-24 | Cm Cerliani S.R.L. | Hook for lockstitch sewing machine comprising a bobbin case with a slide composed of multiple components |
-
2019
- 2019-05-29 KR KR1020190063097A patent/KR102110940B1/en active IP Right Grant
-
2020
- 2020-05-21 US US17/615,050 patent/US20220220650A1/en not_active Abandoned
- 2020-05-21 CN CN202080039629.0A patent/CN113906177A/en active Pending
- 2020-05-21 WO PCT/KR2020/006614 patent/WO2020242122A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1176325A (en) * | 1996-05-16 | 1998-03-18 | 重机公司 | Bobbin casing and under-thread bobbin for sewing machine |
| CN1189550A (en) * | 1997-01-29 | 1998-08-05 | 株式会社广濑制作所 | Rotary hook for sewing machiens |
| CN1470701A (en) * | 2002-07-11 | 2004-01-28 | 东海工业缝纫机株式会社 | Cop-latch cover |
| CN103097600A (en) * | 2010-08-25 | 2013-05-08 | 姜小大 | Lower thread supply device for sewing machine |
| CN106192242A (en) * | 2016-08-08 | 2016-12-07 | 东阳市太极精密制造有限公司 | Large Copacity sewing-machine rotating shuttle |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102110940B1 (en) | 2020-05-14 |
| US20220220650A1 (en) | 2022-07-14 |
| WO2020242122A1 (en) | 2020-12-03 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220107 |