CN215707682U - Folding mechanism of extraction formula paper handkerchief - Google Patents
Folding mechanism of extraction formula paper handkerchief Download PDFInfo
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- CN215707682U CN215707682U CN202121256844.4U CN202121256844U CN215707682U CN 215707682 U CN215707682 U CN 215707682U CN 202121256844 U CN202121256844 U CN 202121256844U CN 215707682 U CN215707682 U CN 215707682U
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Abstract
The utility model relates to a folding mechanism of a removable tissue, which comprises a paper feeding roller and a cutting mechanism, wherein the inner side of the paper feeding roller is respectively provided with a first raw paper and a second raw paper, the outer sides of the lower parts of the paper feeding roller are respectively provided with a sucker roller, the outer sides of the sucker rollers are respectively provided with the cutting mechanism, the inner sides of the lower parts of the cutting mechanism are respectively provided with a guide roller, the inner sides of the lower parts of the guide rollers are respectively provided with a pressing roller, the lower parts of the pressing rollers are respectively provided with a first folding roller and a second folding roller, the outer sides of the first folding roller and the second folding roller are respectively provided with a connecting rod, the outer sides of the connecting rods are respectively provided with a fixed seat, the lower parts of the fixed seats are respectively provided with a swing cylinder, and the lower parts of the first folding roller and the second folding roller are provided with stacking groove pipes; the paper connecting device has the advantages of simple structure, convenience in use, high working efficiency and capability of avoiding the phenomenon of paper connection.
Description
Technical Field
The utility model belongs to the technical field of extraction type tissue machines, and particularly relates to a folding mechanism of extraction type tissues.
Background
The extraction type tissues are also the tissues, in order to avoid wasting the toilet paper with higher cost, people divide the tissues into squares or rectangles, and the tissues are mutually stacked and then put into a paper box with a small opening, and one tissue can be taken out from the small opening every time, so that the tissue is taken out, and the tissue is named; therefore, it is necessary to provide a folding mechanism for removable tissues, which has a simple structure, is convenient to use, has high working efficiency, and avoids the occurrence of a paper connection phenomenon.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides the folding mechanism of the removable tissue, which has the advantages of simple structure, convenience in use, high working efficiency and capability of avoiding the phenomenon of paper connection.
The purpose of the utility model is realized as follows: a folding mechanism of a removable tissue comprises a paper feeding roller and a cutting mechanism, wherein the inner side of the paper feeding roller is respectively provided with a first raw paper and a second raw paper, the outer side of the lower part of the paper feeding roller is provided with a sucker roller, the outer side of the sucker roller is provided with the cutting mechanism, the lower part of the cutting mechanism is provided with a fixed roller, the upper part of the fixed roller is provided with a support column, the outer side of the support column is provided with a mounting seat, the upper part of the mounting seat is provided with a stretching air cylinder, the upper part of the stretching air cylinder is provided with an elastic spring, the upper part of the elastic spring is provided with a connecting seat, the upper part of the connecting seat is provided with a fixed plate, the joint of the fixed plate and the support column is provided with a shaft pin, the upper part of the fixed plate is provided with a mounting bracket, and the inner side in front of the mounting bracket is provided with a cutting knife, the cutting knife is provided with a driver in front, protective plates are arranged above the cutting knife, guide rollers are arranged on the inner sides below the cutting mechanism, pressing rollers are arranged on the inner sides below the guide rollers, a first folding roller and a second folding roller are arranged below the pressing rollers respectively, connecting rods are arranged on the outer sides of the first folding roller and the second folding roller respectively, fixing seats are arranged on the outer sides of the connecting rods, swing cylinders are arranged below the fixing seats, first swing grooves are arranged on the inner sides of the first folding roller corresponding to the connecting rods, a plurality of first air suction holes are uniformly arranged on the inner circumference of the first folding roller, a first cam is arranged in the first folding roller, a first swing frame is arranged on the inner side below the first cam, and a first guide wheel is arranged at the contact position of the first swing frame and the first cam, first rocking frame below preceding be provided with first pivot, the preceding top of first rocking frame be provided with first connecting axle, first rocking frame inboard be provided with first shift fork, the folding roller inboard of second correspond connecting rod department and be provided with the second and wave the groove, the folding roller of second in circle on evenly be provided with a plurality of second eye that induced drafts, the folding roller of second inside be provided with the second cam, second cam below inboard be provided with the second rocking frame, the second rocking frame be provided with the second guide pulley with second cam contact department, the second rocking frame below preceding be provided with the second pivot, the second rocking frame preceding top be provided with the second connecting axle, second rocking frame inboard be provided with the second shift fork, first folding roller and second folding roller below be provided with and pile up the grooved tube.
The first cam and the second cam are respectively connected with corresponding connecting rods, the first shifting fork is connected with the first swing frame through a first connecting shaft, and the second shifting fork is connected with the second swing frame through a second connecting shaft.
The first swing groove and the second swing groove are arc-shaped grooves.
The first shifting fork and the second shifting fork are both arc-angle L-shaped structures.
The utility model has the beneficial effects that: the utility model relates to a folding mechanism for a removable tissue, which is characterized in that when in use, a first base paper and a second base paper are respectively fed into corresponding sucker rollers through a paper feeding roller, the sucker rollers can adsorb the corresponding first base paper and the second base paper, a driver drives a cutter to cut the corresponding first base paper and the second base paper, a stretching cylinder drives a fixing plate to rotate for a certain angle around a shaft pin through an elastic spring, and further the distance between the cutter and the corresponding first base paper and the corresponding second base paper on the sucker rollers is adjusted, so that the cutter can better fit the corresponding first base paper and the corresponding second base paper, the cutting effect is improved, the inertial displacement generated in the cutting process of the first base paper and the second base paper is effectively eliminated, even if a machine runs at a high speed, the cutter connection phenomenon can not occur, the paper connection phenomenon during subsequent folding can be avoided, the yield is greatly improved, and the product quality is ensured, the first base paper and the second base paper after cutting are sent to a pressing roller through corresponding guide rollers, the first base paper and the second base paper are pressed by the pressing roller and then sent to a first folding roller and a second folding roller for folding operation, when the first folding roller rotates clockwise, a first air suction eye sucks the first base paper and the second base paper after being pressed, a swinging cylinder outside the first folding roller drives a corresponding first cam to do clockwise and anticlockwise swinging motion through a connecting rod, the first cam drives a first swinging frame to do anticlockwise and clockwise swinging motion around a first rotating shaft through a first guide wheel so as to drive a first shifting fork to do anticlockwise and clockwise swinging motion, along with the motion of the first air suction eye and the motion of the first shifting fork, when the first shifting fork moves anticlockwise to shield the first air suction eye, the first air suction eye does not suck the first base paper and the second base paper after being pressed, then the first shifting fork moves clockwise to drive the first and second compressed base papers to move downwards into the stacking slot tube, in the downward moving process of the first shifting fork, a second air suction hole of the second folding roller starts to attract the first and second compressed base papers, then the second shifting fork drives the first and second compressed base papers to move downwards into the stacking slot tube (the same as the motion process of the first shifting fork mentioned above), and the first and second compressed base papers alternately work, so that the first and second compressed base papers are crosswise folded into a rectangular paper stack, and the working efficiency is greatly improved; the paper connecting device has the advantages of simple structure, convenience in use, high working efficiency and capability of avoiding the phenomenon of paper connection.
Drawings
Fig. 1 is a front view of a folding mechanism for a pop-up towel of the present invention.
Fig. 2 is a schematic structural view of a cutting mechanism of a folding mechanism of a removable tissue according to the present invention.
Fig. 3 is a schematic structural view of a first folding roller and a second folding roller of the folding mechanism of the removable towel.
Fig. 4 is a partial structural schematic diagram of fig. 3.
FIG. 5 is a schematic view of the working state of the folding mechanism of the removable towel of the present invention.
In the figure: 1. the paper feeding device comprises a paper feeding roller 2, a suction cup roller 3, a cutting mechanism 4, a guide roller 5, a pressing roller 6, a first folding roller 7, a second folding roller 8, a connecting rod 9, a fixed seat 10, a swing cylinder 11, a stacking groove pipe 12, a fixed roller 13, a support column 14, a mounting seat 15, a stretching cylinder 16, a tension spring 17, a connecting seat 18, a fixed plate 19, a shaft pin 20, a mounting frame 21, a protection plate 22, a cutting knife 23, a driver 24, a first swing groove 25, a first air suction eye 26, a first cam 27, a first guide wheel 28, a first swing frame 29, a first rotating shaft 30, a first connecting shaft 31, a first shifting fork 32, a second swing groove 33, a second air suction eye 34, a second cam 35, a second guide wheel 36, a second swing frame 37, a second rotating shaft 38, a second connecting shaft 39, a first connecting shaft 39, a second connecting shaft 36, a connecting shaft, a connecting rod 9, a fixing seat 10, a swing groove 25, a fixing seat, a fixing plate, A second fork 40, a first base paper 41 and a second base paper.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-5, a folding mechanism for removable tissues comprises a paper feeding roller 1 and a cutting mechanism 3, wherein a first base paper 40 and a second base paper 41 are respectively arranged on the inner side of the paper feeding roller 1, a sucker roller 2 is arranged on the outer side of the lower part of the paper feeding roller 1, the cutting mechanism 3 is arranged on the outer side of the sucker roller 2, a fixed roller 12 is arranged on the lower part of the cutting mechanism 3, a support pillar 13 is arranged on the upper part of the fixed roller 12, a mounting seat 14 is arranged on the lower part of the outer side of the support pillar 13, a stretching cylinder 15 is arranged on the upper part of the mounting seat 14, a tension spring 16 is arranged on the upper part of the stretching cylinder 15, a connecting seat 17 is arranged on the upper part of the tension spring 16, a fixing plate 18 is arranged on the upper part of the connecting seat 17, a shaft pin 19 is arranged at the joint of the fixing plate 18 and the support pillar 13, the upper part of the fixing plate 18 is provided with a mounting frame 20, the front inner side of the mounting frame 20 is provided with a cutting knife 22, the front part of the cutting knife 22 is provided with a driver 23, the upper part of the cutting knife 22 is provided with a protection plate 21, the lower inner side of the cutting mechanism 3 is provided with a guide roller 4, the lower inner side of the guide roller 4 is provided with a pressing roller 5, the lower part of the pressing roller 5 is provided with a first folding roller 6 and a second folding roller 7 respectively, the outer sides of the first folding roller 6 and the second folding roller 7 are provided with connecting rods 8, the outer sides of the connecting rods 8 are provided with fixing seats 9, the lower parts of the fixing seats 9 are provided with swing air cylinders 10 respectively, the inner side of the first folding roller 6 is provided with a first swing groove 24 corresponding to the connecting rods 8, and the inner circumference of the first folding roller 6 is uniformly provided with a plurality of first air suction holes 25, the first folding roller 6 is internally provided with a first cam 26, the inner side below the first cam 26 is provided with a first swing frame 28, the contact part of the first swing frame 28 and the first cam 26 is provided with a first guide wheel 27, the front side below the first swing frame 28 is provided with a first rotating shaft 29, the front side above the first swing frame 28 is provided with a first connecting shaft 30, the inner side of the first swing frame 28 is provided with a first shifting fork 31, the inner side of the second folding roller 7 is provided with a second swing groove 32 corresponding to the connecting rod 8, the inner circumference of the second folding roller 7 is uniformly provided with a plurality of second air suction eyes 33, the inner side below the second folding roller 7 is provided with a second cam 34, the inner side below the second cam 34 is provided with a second swing frame 36, the contact part of the second swing frame 36 and the second cam 34 is provided with a second guide wheel 35, second swing frame 36 below preceding be provided with second pivot 37, second swing frame 36 preceding top be provided with second connecting axle 38, second swing frame 36 inboard be provided with second shift fork 39, first folding roller 6 and second folding roller 7 below be provided with and pile up grooved tube 11.
The utility model relates to a folding mechanism for a removable tissue, which is characterized in that in use, a first base paper 40 and a second base paper 41 are respectively fed into corresponding sucker rollers 2 through a paper feeding roller 1, the sucker rollers 2 can adsorb the corresponding first base paper 40 and second base paper 41, a driver 23 drives a cutting knife 22 to cut the corresponding first base paper 40 and second base paper 41, a stretching cylinder 15 drives a fixing plate 18 to rotate for a certain angle around a shaft pin 19 through an elastic spring 16, further, the distance between the cutting knife 22 and the corresponding first base paper 40 and second base paper 41 on the sucker rollers 2 is adjusted, the cutting knife 22 is convenient to be better attached to the corresponding first base paper 40 and second base paper 41, the cutting effect is improved, the inertial displacement generated in the cutting process of the first base paper 40 and the second base paper 41 is effectively eliminated, and the phenomenon of knife connection does not occur even if a machine runs at high speed, the phenomenon of paper connection during subsequent folding is avoided, the yield is greatly improved, the product quality is ensured, the cut first base paper 40 and the cut second base paper 41 are sent into a pressing roller 5 through a corresponding guide roller 4, the first base paper 40 and the second base paper 41 are pressed by the pressing roller 5 and then sent into a first folding roller 6 and a second folding roller 7 for folding operation, when the first folding roller 6 rotates clockwise, a first air suction eye 25 sucks the pressed first base paper 40 and the pressed second base paper 41, a swing cylinder 10 on the outer side of the first folding roller 6 drives a corresponding first cam 26 to swing clockwise and anticlockwise through a connecting rod 8, the first cam 26 drives a first swing frame 28 to swing anticlockwise and clockwise around a first rotating shaft 29 through a first guide wheel 27, and further drives a first shifting fork 31 to swing anticlockwise and clockwise, and along with the movement of the first air suction eye 25 and the movement of the first shifting fork 31, when the first shifting fork 31 moves anticlockwise to shield the first air suction hole 25, the first air suction hole 25 does not attract the first pressed base paper 40 and the second pressed base paper 41 any more, then the first shifting fork 31 moves clockwise to drive the first pressed base paper 40 and the second pressed base paper 41 to move downwards into the stacking slot tube 11, in the downward movement process of the first shifting fork 31, the second air suction hole 33 of the second folding roller 7 starts to attract the first pressed base paper 40 and the second pressed base paper 41, then the second shifting fork 39 drives the first pressed base paper 40 and the second pressed base paper 41 to move downwards into the stacking slot tube 11 (the same as the movement process of the first shifting fork 31 mentioned above), and the first pressed base paper 40 and the second pressed base paper 41 alternately work, so that the first pressed base paper 40 and the second pressed base paper 41 are folded into a rectangular paper stack in a crossed manner, and the working efficiency is greatly improved.
Example 2
As shown in fig. 1-5, a folding mechanism for removable tissues comprises a paper feeding roller 1 and a cutting mechanism 3, wherein a first base paper 40 and a second base paper 41 are respectively arranged on the inner side of the paper feeding roller 1, a sucker roller 2 is arranged on the outer side of the lower part of the paper feeding roller 1, the cutting mechanism 3 is arranged on the outer side of the sucker roller 2, a fixed roller 12 is arranged on the lower part of the cutting mechanism 3, a support pillar 13 is arranged on the upper part of the fixed roller 12, a mounting seat 14 is arranged on the lower part of the outer side of the support pillar 13, a stretching cylinder 15 is arranged on the upper part of the mounting seat 14, a tension spring 16 is arranged on the upper part of the stretching cylinder 15, a connecting seat 17 is arranged on the upper part of the tension spring 16, a fixing plate 18 is arranged on the upper part of the connecting seat 17, a shaft pin 19 is arranged at the joint of the fixing plate 18 and the support pillar 13, the upper part of the fixing plate 18 is provided with a mounting frame 20, the front inner side of the mounting frame 20 is provided with a cutting knife 22, the front part of the cutting knife 22 is provided with a driver 23, the upper part of the cutting knife 22 is provided with a protection plate 21, the lower inner side of the cutting mechanism 3 is provided with a guide roller 4, the lower inner side of the guide roller 4 is provided with a pressing roller 5, the lower part of the pressing roller 5 is provided with a first folding roller 6 and a second folding roller 7 respectively, the outer sides of the first folding roller 6 and the second folding roller 7 are provided with connecting rods 8, the outer sides of the connecting rods 8 are provided with fixing seats 9, the lower parts of the fixing seats 9 are provided with swing air cylinders 10 respectively, the inner side of the first folding roller 6 is provided with a first swing groove 24 corresponding to the connecting rods 8, and the inner circumference of the first folding roller 6 is uniformly provided with a plurality of first air suction holes 25, the first folding roller 6 is internally provided with a first cam 26, the inner side below the first cam 26 is provided with a first swing frame 28, the contact part of the first swing frame 28 and the first cam 26 is provided with a first guide wheel 27, the front side below the first swing frame 28 is provided with a first rotating shaft 29, the front side above the first swing frame 28 is provided with a first connecting shaft 30, the inner side of the first swing frame 28 is provided with a first shifting fork 31, the inner side of the second folding roller 7 is provided with a second swing groove 32 corresponding to the connecting rod 8, the inner circumference of the second folding roller 7 is uniformly provided with a plurality of second air suction eyes 33, the inner side below the second folding roller 7 is provided with a second cam 34, the inner side below the second cam 34 is provided with a second swing frame 36, the contact part of the second swing frame 36 and the second cam 34 is provided with a second guide wheel 35, second swing frame 36 below preceding be provided with second pivot 37, second swing frame 36 preceding top be provided with second connecting axle 38, second swing frame 36 inboard be provided with second shift fork 39, first folding roller 6 and second folding roller 7 below be provided with and pile up grooved tube 11.
For better effect, the first cam 26 and the second cam 34 are respectively connected with the corresponding connecting rods 8, the first fork 31 is connected with the first swing frame 28 through the first connecting shaft 30, and the second fork 39 is connected with the second swing frame 36 through the second connecting shaft 38.
For better effect, the first and second swing grooves 24 and 32 are arc-shaped grooves.
For better effect, the first fork 31 and the second fork 39 are both arc angle "L" shaped structures.
In use, the first base paper 40 and the second base paper 41 are respectively sent to the corresponding suction cup rollers 2 through the paper feeding roller 1, the suction cup rollers 2 can adsorb the corresponding first base paper 40 and the second base paper 41, the driver 23 drives the cutter 22 to cut the corresponding first base paper 40 and the second base paper 41, the stretching cylinder 15 drives the fixing plate 18 to rotate for a certain angle around the shaft pin 19 through the elastic spring 16, and further the distance between the cutter 22 and the corresponding first base paper 40 and the corresponding second base paper 41 on the suction cup rollers 2 is adjusted, so that the cutter 22 can better attach the corresponding first base paper 40 and the corresponding second base paper 41, the cutting effect is improved, the inertial displacement generated in the cutting process of the first base paper 40 and the second base paper 41 is effectively eliminated, even if the machine runs at a high speed, the cutter connection phenomenon can not occur, the paper connection phenomenon during subsequent folding can be avoided, and the yield can be greatly improved, the product quality is ensured, the cut first base paper 40 and the cut second base paper 41 are sent to a pressing roller 5 through a corresponding guide roller 4, the pressing roller 5 presses the first base paper 40 and the second base paper 41 tightly, then the base paper is sent to a first folding roller 6 and a second folding roller 7 for folding operation, when the first folding roller 6 rotates clockwise, the first air suction eye 25 sucks the pressed first base paper 40 and the pressed second base paper 41, a swing cylinder 10 at the outer side of the first folding roller 6 drives a corresponding first cam 26 to do clockwise and anticlockwise swing motion through a connecting rod 8, the first cam 26 drives a first swing frame 28 to do anticlockwise and clockwise swing motion around a first rotating shaft 29 through a first guide wheel 27, and further drives a first shifting fork 31 to do anticlockwise and clockwise swing motion, along with the motion of the first air suction eye 25 and the motion of the first shifting fork 31, when the first shifting fork 31 moves anticlockwise to shield the first air suction eye 25, the first air suction holes 25 do not attract the first base paper 40 and the second base paper 41 after being compressed any more, then the first shifting fork 31 moves clockwise to drive the first base paper 40 and the second base paper 41 after being compressed to move downwards into the stacking groove pipe 11, in the process that the first shifting fork 31 moves downwards, the second air suction holes 33 of the second folding roller 7 begin to attract the first base paper 40 and the second base paper 41 after being compressed, then the first base paper 40 and the second base paper 41 after being compressed are finally driven by the second shifting fork 39 to move downwards into the stacking groove pipe 11 (the same as the motion process of the first shifting fork 31 mentioned above), and the first base paper 40 and the second base paper 41 after being compressed work alternately, so that the first base paper 40 and the second base paper 41 after being compressed are folded into a rectangular paper stack in a crossed manner, and the working efficiency is greatly improved.
Claims (4)
1. The utility model provides a folding mechanism of extraction formula paper handkerchief, it includes paper feed roller and cutting mechanism, its characterized in that: the paper feeding device is characterized in that a first base paper and a second base paper are respectively arranged on the inner side of the paper feeding roller, a sucker roller is arranged on the outer side of the lower portion of the paper feeding roller, a cutting mechanism is arranged on the outer side of the sucker roller, a fixed roller is arranged on the lower portion of the cutting mechanism, a support column is arranged on the upper portion of the fixed roller, an installation seat is arranged on the lower portion of the outer side of the support column, a stretching air cylinder is arranged on the upper portion of the installation seat, a tension spring is arranged on the upper portion of the stretching air cylinder, a connecting seat is arranged on the upper portion of the tension spring, a fixed plate is arranged on the upper portion of the connecting seat, a shaft pin is arranged at the connecting position of the fixed plate and the support column, an installation frame is arranged on the upper portion of the fixed plate, a cutting knife is arranged on the inner side of the front surface of the installation frame, a driver is arranged in front of the cutting knife, and a protection plate is arranged on the upper portion of the cutting knife, the cutting mechanism is characterized in that guide rollers are arranged on the inner sides below the cutting mechanism, pressing rollers are arranged on the inner sides below the guide rollers, a first folding roller and a second folding roller are arranged below the pressing rollers respectively, connecting rods are arranged on the outer sides of the first folding roller and the second folding roller respectively, fixing seats are arranged on the outer sides of the connecting rods, swing cylinders are arranged below the fixing seats, a first swing groove is formed in the inner side of the first folding roller corresponding to the connecting rod, a plurality of first air suction holes are uniformly formed in the inner circumference of the first folding roller, a first cam is arranged in the first folding roller, a first swing frame is arranged on the inner side below the first cam, a first guide wheel is arranged at the contact position of the first swing frame and the first cam, a first rotating shaft is arranged in front of the lower side of the first swing frame, a first connecting shaft is arranged above the front of the first swing frame, first rocking frame inboard be provided with first shift fork, the folding roller inboard of second correspond connecting rod department and be provided with the second and wave the groove, the folding roller of second evenly be provided with a plurality of second air suction hole in the circumference, the folding roller of second inside be provided with the second cam, second cam below inboard be provided with the second rocking frame, the second rocking frame be provided with the second guide pulley with second cam contact department, the second rocking frame below preceding be provided with the second pivot, the preceding top of second rocking frame be provided with the second connecting axle, the second rocking frame inboard be provided with the second shift fork, the folding roller below of first folding roller and second be provided with and pile up the grooved tube.
2. The folding mechanism for a removable towel as recited in claim 1, wherein: the first cam and the second cam are respectively connected with corresponding connecting rods, the first shifting fork is connected with the first swing frame through a first connecting shaft, and the second shifting fork is connected with the second swing frame through a second connecting shaft.
3. The folding mechanism for a removable towel as recited in claim 1, wherein: the first swing groove and the second swing groove are arc-shaped grooves.
4. The folding mechanism for a removable towel as recited in claim 1, wherein: the first shifting fork and the second shifting fork are both arc-angle L-shaped structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121256844.4U CN215707682U (en) | 2021-06-07 | 2021-06-07 | Folding mechanism of extraction formula paper handkerchief |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121256844.4U CN215707682U (en) | 2021-06-07 | 2021-06-07 | Folding mechanism of extraction formula paper handkerchief |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215707682U true CN215707682U (en) | 2022-02-01 |
Family
ID=80041310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121256844.4U Active CN215707682U (en) | 2021-06-07 | 2021-06-07 | Folding mechanism of extraction formula paper handkerchief |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215707682U (en) |
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2021
- 2021-06-07 CN CN202121256844.4U patent/CN215707682U/en active Active
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