EP3842162A1 - Environmentally friendly straw and manufacturing method thereof - Google Patents
Environmentally friendly straw and manufacturing method thereof Download PDFInfo
- Publication number
- EP3842162A1 EP3842162A1 EP19219717.6A EP19219717A EP3842162A1 EP 3842162 A1 EP3842162 A1 EP 3842162A1 EP 19219717 A EP19219717 A EP 19219717A EP 3842162 A1 EP3842162 A1 EP 3842162A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubular body
- leveling
- honing
- machine
- environmentally friendly
- 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.)
- Granted
Links
- 239000010902 straw Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G2400/00—Details not otherwise provided for in A47G19/00-A47G23/16
- A47G2400/02—Hygiene
Definitions
- the present invention is generally related to straws, and more particular to an environmentally friendly straw and its manufacturing method.
- a major objective of the present invention is to employ a honing machine to polish an inner wall of a straw so that the straw is convenient to clean and use.
- the environmentally friendly straw includes a tubular body having a through channel inside connecting two openings respectively at two ends of the tubular body, an outer layer surrounding the tubular body between the two openings formed by a leveling machine, an inner layer, as an inner wall of the tubular body, surrounding the channel formed by a honing machine.
- the straw is manufactured by first leveling the tubular body by a leveling machine so as to enhance a straightness of the tubular body up to an accuracy below 0.01mm.
- the leveled tubular body's inner wall is then honed by a honing machine by reciprocally threading a spinning abrasive element into the channel of the tubular body through the openings.
- a smooth inner layer between the channel and the tubular body having a center line average roughness (Ra) below 0.025 ⁇ is achieved so that the straw is convenient to clean and use.
- an environmentally friendly straw according to a first embodiment of the present invention includes the following components.
- a tubular body 1 has a through channel 12 inside connecting two openings 11 respectively at two ends of the tubular body 1.
- the tubular body 1 is made of metal, glass, or other material.
- the inner layer 13 is formed by a honing machine 2.
- the honing machine 2 is an upright honing machine 2.
- the honing machine 2 may also be a horizontal honing machine 2.
- the honing machine 2 includes a honing driving member 21, a rotational member 22, and at least an abrasive element 23.
- the rotational member 22 is joined to and engaged by the honing driving member 21, and the abrasive element 23 is configured around the rotational member 22.
- the honing driving member 21 therefore drives the rotational member 22 and the abrasive element 23 as well to turn.
- the honing driving member 21 is a motor
- the abrasive element 23 is one of sandpaper, millstone, sand strip, and foam sandpaper.
- the present embodiment uses sandpaper as example.
- the honing machine 2 further includes a first reciprocal member 24 engaging the rotational member 22 into a reciprocal movement.
- the environmentally friendly straw further includes an outer layer 14 around the tubular body 1 between the two openings 11.
- the outer layer 14 is formed by a leveling machine 3.
- the leveling machine 3 includes a number of support elements 31 holding the environmentally friendly straw in between, a leveling driving member 32 positioned to a side to the support elements 31 (the present embodiment has a rotatable cylindrical as an example of the leveling driving member 32), a leveling element 33 configured to a bottom end of the leveling driving member 32, and a straightness measurement member 34 measuring a levelness of the tubular body 1.
- a bottom side of the leveling element 33 has a trough 331. Inside and along the trough 331, there is a protrusion 332 and two recesses 333 next to the two ends of protrusion 332, respectively. A convex shape is thereby formed inside the trough 331.
- a cushion element 311 is beneath each support element 31.
- the tubular body 1 is thereby polished by the honing machine 2 to form a smooth inner layer 13 so that the environmentally friendly straw may be cleaned thoroughly.
- the environmentally friendly straw is manufactured through the following steps:
- a metallic tube would be leveled before it is out of factory.
- this leveling can only achieve 0.05mm ⁇ 01mm deformation for the tubular body 1.
- Honing a tubular body with this amount of deformation is rather difficult and not cost-effective, as the smoothness is hard to control, working time is prolonged. Therefore, in the present invention, the tubular body 1 is first further leveled on the leveling machine 3 before honing.
- the tubular body 1 is first supported between support elements 31, and its straightness is measured by the straightness measurement member 34 to detect places along the tubular body 1 having greater deformation. Then, the leveling driving member 32 drives the leveling element 33, for example, through a hydraulic means, to level the tubular body 1.
- the leveling element 33's trough 331 has a semi-cylindrical shape compatible to the tubular body 1's shape.
- the trough 331 is aligned with the tubular body 1 and, through the recesses 333, only the protrusion 332 inside the trough 331 would contact with the tubular body 1. In this way, the tubular body 1 would not be pressed and deformed. Then, the tubular body 1, based on its own rigidness, is leveled by the repeated contact of the leveling element 33. If the leveling driving member 32 exerts too much a pressure, the support elements 31 would descend by compressing the cushion element 311 so that the tubular body 1 would not be deformed. As such, the tubular body 1 may be leveled until its deformation is less than 0.01mm, and the subsequent honing can be performed more smoothly.
- the reciprocal honing after the above leveling may polish the inner layer 13 for further smoothness until the inner layer 13 has a center line average roughness (Ra) below 0.025 ⁇ , conforming to the standard of various countries.
- Ra center line average roughness
- the channel 12 is not clogged by larger particles, is difficult to contaminate, and is more convenient to clean.
- a step (c1) may be performed after the step (c), where the first reciprocal member engages the rotational member and the abrasive element into a reciprocal movement to conduct reciprocal honing.
- a step (c1) may be performed after the step (c), where the first reciprocal member engages the rotational member and the abrasive element into a reciprocal movement to conduct reciprocal honing.
- manual or other reciprocal operation is also possible.
- a step (h1) may be conducted after the step (h) where, after a first round of honing, the abrasive element 23a may be replaced by another abrasive element 23a of a finer grit size, and a second round of honing is conducted.
- an initial honing is performed with an abrasive element 23a of a greater grit size, and a second honing is conducted with abrasive element 23a of a finer grit size. In this way, not only honing performance, but also honing accuracy is enhanced.
- the honing machine 2b of this embodiment further includes a second reciprocal member 25b disposed to a side of the rotational member 22b, engaging the tubular body 1b into a reciprocal movement.
- a step (f1) may be conducted after the step (f), where the second reciprocal member drives the tubular body 1b to move reciprocally, so that it is honed by the spinning abrasive element 23b.
- This embodiment adopts a horizontal honing machine 2b, demonstrating that the environmentally friendly straw may be manufactured using either upright or horizontal honing machine 2b.
- FIG. 16 another embodiment also involves a horizontal honing machine 2c. This embodiment, then, involves manually driving the tubular body 1c reciprocally against the abrasive element 23c. This embodiment demonstrates that the honing of the environmentally friendly straw can be performed manually without resorting to any mechanical driving.
- FIG. 17 another embodiment of the leveling machine has a leveling driving member 32d manually operated by a wheel, demonstrating that the leveling driving member 32d may be implemented in various ways.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
- The present invention is generally related to straws, and more particular to an environmentally friendly straw and its manufacturing method.
- For environmental protection, many countries prevent the use of plastic bags, cups, and straws. Most people are also gradually used to bring their own bags, cups, and straws. Cleaning for these food-related products is important. However, it is difficult to clean the inner wall of a straw when it is dirty.
- A major objective of the present invention is to employ a honing machine to polish an inner wall of a straw so that the straw is convenient to clean and use.
- To achieve the objective, the environmentally friendly straw includes a tubular body having a through channel inside connecting two openings respectively at two ends of the tubular body, an outer layer surrounding the tubular body between the two openings formed by a leveling machine, an inner layer, as an inner wall of the tubular body, surrounding the channel formed by a honing machine.
- The straw is manufactured by first leveling the tubular body by a leveling machine so as to enhance a straightness of the tubular body up to an accuracy below 0.01mm. The leveled tubular body's inner wall is then honed by a honing machine by reciprocally threading a spinning abrasive element into the channel of the tubular body through the openings. As such, a smooth inner layer between the channel and the tubular body having a center line average roughness (Ra) below 0.025µ is achieved so that the straw is convenient to clean and use.
- The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.
- Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
-
-
FIG. 1 is a perspective diagram showing an environmentally friendly straw according to an embodiment of the present invention. -
FIG. 2 is a flow diagram showing the steps of manufacturing the environmentally friendly straw ofFIG. 1 according to an embodiment of the present invention. -
FIG. 3 is a perspective diagram showing a leveling machine used in manufacturing the environmentally friendly straw ofFIG. 1 . -
FIG. 4 is a front-view diagram showing a scenario of the leveling machine ofFIG. 3 in operation. -
FIG. 5 is a front-view diagram showing another scenario of the leveling machine ofFIG. 3 in operation. -
FIG. 6 is a perspective diagram showing how the environmentally friendly straw ofFIG. 1 is placed on a honing machine according to a first embodiment. -
FIG. 7 is a perspective diagram showing how an abrasive element is installed on the honing machine ofFIG. 6 . -
FIG. 8 is a perspective diagram showing a scenario of the environmentally friendly straw ofFIG. 1 honed on the honing machine ofFIG. 7 . -
FIG. 9 is a schematic diagram showing another scenario of the environmentally friendly straw ofFIG. 1 honed on the honing machine ofFIG. 7 . -
FIG. 10 is a perspective diagram showing the environmentally friendly straw ofFIG. 1 after honing on the honing machine ofFIG. 7 . -
FIG. 11 is a perspective diagram showing how abrasive elements are installed on a honing machine according to a second embodiment of the present invention. -
FIG. 12 is a perspective diagram showing a scenario of the environmentally friendly straw ofFIG. 1 honed on the honing machine ofFIG. 11 . -
FIG. 13 is a perspective diagram showing a scenario of placing the environmentally friendly straw ofFIG. 1 on a honing machine according to a third embodiment of the present invention. -
FIG. 14 is a perspective diagram showing another scenario of placing the environmentally friendly straw ofFIG. 1 on the honing machine ofFIG. 13 . -
FIG. 15 is a perspective diagram showing a scenario of the environmentally friendly straw ofFIG. 1 honed on the honing machine ofFIG. 13 . -
FIG. 16 is a perspective diagram showing a scenario of the environmentally friendly straw ofFIG. 1 honed on a honing machine according to a fourth embodiment of the present invention. -
FIG. 17 is a perspective diagram showing a scenario of the environmentally friendly straw ofFIG. 1 honed on a honing machine according to a fifth embodiment of the present invention. - The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.
- As shown in
FIGS. 1 to 10 , an environmentally friendly straw according to a first embodiment of the present invention includes the following components. - A
tubular body 1 has a throughchannel 12 inside connecting twoopenings 11 respectively at two ends of thetubular body 1. Thetubular body 1 is made of metal, glass, or other material. - An
inner layer 13, as an inner wall of thetubular body 1, surrounds thechannel 12. Theinner layer 13 is formed by ahoning machine 2. In the present embodiment, thehoning machine 2 is anupright honing machine 2. Alternatively, thehoning machine 2 may also be ahorizontal honing machine 2. - The
honing machine 2 includes ahoning driving member 21, arotational member 22, and at least anabrasive element 23. Therotational member 22 is joined to and engaged by thehoning driving member 21, and theabrasive element 23 is configured around therotational member 22. The honing drivingmember 21 therefore drives therotational member 22 and theabrasive element 23 as well to turn. In the present embodiment, thehoning driving member 21 is a motor, and theabrasive element 23 is one of sandpaper, millstone, sand strip, and foam sandpaper. The present embodiment uses sandpaper as example. - In the present embodiment, the
honing machine 2 further includes a firstreciprocal member 24 engaging therotational member 22 into a reciprocal movement. - The environmentally friendly straw further includes an
outer layer 14 around thetubular body 1 between the twoopenings 11. Theouter layer 14 is formed by aleveling machine 3. - The
leveling machine 3 includes a number ofsupport elements 31 holding the environmentally friendly straw in between, a levelingdriving member 32 positioned to a side to the support elements 31 (the present embodiment has a rotatable cylindrical as an example of the leveling driving member 32), aleveling element 33 configured to a bottom end of the levelingdriving member 32, and astraightness measurement member 34 measuring a levelness of thetubular body 1. A bottom side of theleveling element 33 has atrough 331. Inside and along thetrough 331, there is aprotrusion 332 and tworecesses 333 next to the two ends ofprotrusion 332, respectively. A convex shape is thereby formed inside thetrough 331. Acushion element 311 is beneath eachsupport element 31. - According to the above description, the
tubular body 1 is thereby polished by thehoning machine 2 to form a smoothinner layer 13 so that the environmentally friendly straw may be cleaned thoroughly. - The environmentally friendly straw is manufactured through the following steps:
- (a) providing a tubular body, where the tubular body has a channel inside connecting two openings at two ends of the tubular body, respectively;
- (b) placing the tubular body on a leveling machine, where the tubular body is supported by the support elements contacting the openings, respectively;
- (c) leveling the tubular body by a leveling element driven by a leveling driving member of the leveling machine against the tubular body, where a straightness of the tubular body is measured by a straightness measurement member;
- (d) placing the leveled tubular body on a honing machine;
- (e) configuring at least an abrasive element on a rotational member of the honing machine;
- (f) spinning the abrasive element by the rotational member rotated by a honing driving member of the honing machine;
- (g) threading the abrasive element into the channel through the openings;
- (h) moving the abrasive element reciprocally inside the channel; and
- (i) forming an inner layer around the channel inside the tubular body by the abrasive element's reciprocal movement.
- Ordinarily, a metallic tube would be leveled before it is out of factory. However, this leveling can only achieve 0.05mm∼01mm deformation for the
tubular body 1. Honing a tubular body with this amount of deformation is rather difficult and not cost-effective, as the smoothness is hard to control, working time is prolonged. Therefore, in the present invention, thetubular body 1 is first further leveled on the levelingmachine 3 before honing. - For this leveling work, the
tubular body 1 is first supported betweensupport elements 31, and its straightness is measured by thestraightness measurement member 34 to detect places along thetubular body 1 having greater deformation. Then, theleveling driving member 32 drives the levelingelement 33, for example, through a hydraulic means, to level thetubular body 1. - The leveling
element 33'strough 331 has a semi-cylindrical shape compatible to thetubular body 1's shape. When leveling is performed, thetrough 331 is aligned with thetubular body 1 and, through therecesses 333, only theprotrusion 332 inside thetrough 331 would contact with thetubular body 1. In this way, thetubular body 1 would not be pressed and deformed. Then, thetubular body 1, based on its own rigidness, is leveled by the repeated contact of the levelingelement 33. If theleveling driving member 32 exerts too much a pressure, thesupport elements 31 would descend by compressing thecushion element 311 so that thetubular body 1 would not be deformed. As such, thetubular body 1 may be leveled until its deformation is less than 0.01mm, and the subsequent honing can be performed more smoothly. - Compared to ordinary honing by lathe or internal hole grinder, the reciprocal honing after the above leveling may polish the
inner layer 13 for further smoothness until theinner layer 13 has a center line average roughness (Ra) below 0.025µ, conforming to the standard of various nations. As theinner layer 13 is very smooth, thechannel 12 is not clogged by larger particles, is difficult to contaminate, and is more convenient to clean. - In the present embodiment, an
upright honing machine 2 is used as an example. Therefore, a step (c1) may be performed after the step (c), where the first reciprocal member engages the rotational member and the abrasive element into a reciprocal movement to conduct reciprocal honing. However, manual or other reciprocal operation is also possible. - As shown in
FIGS. 11 and12 , a step (h1) may be conducted after the step (h) where, after a first round of honing, theabrasive element 23a may be replaced by anotherabrasive element 23a of a finer grit size, and a second round of honing is conducted. - As such, an initial honing is performed with an
abrasive element 23a of a greater grit size, and a second honing is conducted withabrasive element 23a of a finer grit size. In this way, not only honing performance, but also honing accuracy is enhanced. - As shown in
FIGS. 13 to 15 , the honingmachine 2b of this embodiment further includes a secondreciprocal member 25b disposed to a side of therotational member 22b, engaging thetubular body 1b into a reciprocal movement. - A step (f1) may be conducted after the step (f), where the second reciprocal member drives the
tubular body 1b to move reciprocally, so that it is honed by the spinningabrasive element 23b. - This embodiment adopts a horizontal honing
machine 2b, demonstrating that the environmentally friendly straw may be manufactured using either upright or horizontal honingmachine 2b. - As shown in
FIG. 16 , another embodiment also involves a horizontal honingmachine 2c. This embodiment, then, involves manually driving the tubular body 1c reciprocally against theabrasive element 23c. This embodiment demonstrates that the honing of the environmentally friendly straw can be performed manually without resorting to any mechanical driving. - As shown in
FIG. 17 , another embodiment of the leveling machine has aleveling driving member 32d manually operated by a wheel, demonstrating that theleveling driving member 32d may be implemented in various ways. - While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.
Claims (10)
- An environmentally friendly straw, comprising:a tubular body (1) having a through channel (12) inside connecting two openings (11) respectively at two ends of the tubular body (1);an outer layer (14) surrounding the tubular body (1) between the two openings (11), where the outer layer (14) is formed by a leveling machine (3);an inner layer (13), as an inner wall of the tubular body (1), surrounding the channel (12), where the inner layer (13) is formed by a honing machine (2);wherein the honing machine (2) comprises a honing driving member (21), a rotational member (22), and at least an abrasive element (23); the rotational member (22) is joined to and engaged by the honing driving member (21) to spin; the abrasive element (23) is configured around the rotational member (22); and the tubular body (1) is reciprocally worked by the abrasive element (23).
- The environmentally friendly straw according to claim 1, wherein the honing machine (2) further comprises a first reciprocal member (24) connected to and engaging the rotational member (22) into a reciprocal movement.
- The environmentally friendly straw according to claim 1, wherein the honing machine (2) further comprises a second reciprocal member (25b) disposed to a side of the rotational member (22b) and engaging the tubular body (1) into a reciprocal movement.
- The environmentally friendly straw according to claim 1, wherein the leveling machine (3) comprises a plurality of support elements (31) holding the environmentally friendly straw in between, a leveling driving member (32) positioned to a side to the support elements (31), a leveling element (33) configured to a bottom end of the leveling driving member (32) for contacting the tubular body (1), and a straightness measurement member (34) measuring a levelness of the tubular body (1).
- The environmentally friendly straw according to claim 4, wherein a bottom side of the leveling element (33) has a trough (331); inside and along the trough (331), there is a protrusion (332) and a plurality of recesses (333) next to the protrusion (332)'s two ends, respectively; and a cushion element (311) is beneath each support element (31).
- A method of manufacturing an environmentally friendly straw, comprising the steps of:(a) providing a tubular body (1), where the tubular body (1) has a channel (12) inside connecting two openings (11) at two ends of the tubular body (1), respectively;(b) placing the tubular body (1) on a leveling machine (3), where the tubular body (1) is supported by a plurality of support elements (31) of the leveling machine (3) contacting the openings (11), respectively;(c) leveling the tubular body (1) by a leveling element (33) driven by a leveling driving member (32) of the leveling machine (3) against the tubular body (1), where a straightness of the tubular body (1) is measured by a straightness measurement member (34) of the leveling machine (3);(d) placing the tubular body (1) after leveling by the leveling machine (3) on a honing machine (2);(e) configuring at least an abrasive element (23) on a rotational member (22) of the honing machine (2);(f) spinning the abrasive element (23) by the rotational member (22) rotated by a honing driving member (21) of the honing machine (2);(g) threading the abrasive element (23) into the channel (12) through the openings (11);(h) moving the abrasive element (23) reciprocally inside the channel (12); and(i) forming an inner layer (13) around the channel (12) inside the tubular body (1) by the abrasive element (23)'s reciprocal movement.
- The method according to claim 6, further comprising a step (f1) after the step (f) of: providing a first reciprocal member (24) connected to the rotational member (22) that engages the rotational member (22) into a reciprocal movement.
- The method according to claim 6, further comprising a step (f1) after the step (f) of: providing a second reciprocal member (25b) to a side of the rotational member (22b) that engages the tubular body (1b) into a reciprocal movement.
- The method according to claim 6, further comprising a step (h1) after the step (h) of: replacing the abrasive element (23a) with a second abrasive element (23a) of a finer grit size and conducting a second round of honing.
- The method according to claim 6, wherein a bottom side of the leveling element (33) has a trough (331); inside and along the trough (331), there is a protrusion (332) and a plurality of recesses (333) next to the protrusion's two ends, respectively; and a cushion element (311) is beneath each support element (31).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19219717.6A EP3842162B1 (en) | 2019-12-26 | 2019-12-26 | Manufacturing method of environmentally friendly straw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19219717.6A EP3842162B1 (en) | 2019-12-26 | 2019-12-26 | Manufacturing method of environmentally friendly straw |
Publications (3)
Publication Number | Publication Date |
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EP3842162A1 true EP3842162A1 (en) | 2021-06-30 |
EP3842162C0 EP3842162C0 (en) | 2023-08-02 |
EP3842162B1 EP3842162B1 (en) | 2023-08-02 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19219717.6A Active EP3842162B1 (en) | 2019-12-26 | 2019-12-26 | Manufacturing method of environmentally friendly straw |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE719624C (en) * | 1940-03-16 | 1942-04-13 | Schloemann Ag | Device for straightening round bodies |
DE2812463A1 (en) * | 1978-03-22 | 1979-09-27 | Dunkes Maschinenbau Kg | Internal straightening machine for gun barrels - uses two centre punches directed by auto-collimator focussed into barrel bore |
GB2026730A (en) * | 1978-07-26 | 1980-02-06 | Galdabini R | Machine for automatically straightening-out elongate workpieces |
CN101829708B (en) * | 2010-05-14 | 2011-08-31 | 中建七局第二建筑有限公司 | Manually rotating-pressing type steel tube straightener |
CN209360306U (en) * | 2018-10-19 | 2019-09-10 | 叶家澄 | The structure of environmentally friendly suction pipe |
-
2019
- 2019-12-26 EP EP19219717.6A patent/EP3842162B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE719624C (en) * | 1940-03-16 | 1942-04-13 | Schloemann Ag | Device for straightening round bodies |
DE2812463A1 (en) * | 1978-03-22 | 1979-09-27 | Dunkes Maschinenbau Kg | Internal straightening machine for gun barrels - uses two centre punches directed by auto-collimator focussed into barrel bore |
GB2026730A (en) * | 1978-07-26 | 1980-02-06 | Galdabini R | Machine for automatically straightening-out elongate workpieces |
CN101829708B (en) * | 2010-05-14 | 2011-08-31 | 中建七局第二建筑有限公司 | Manually rotating-pressing type steel tube straightener |
CN209360306U (en) * | 2018-10-19 | 2019-09-10 | 叶家澄 | The structure of environmentally friendly suction pipe |
Also Published As
Publication number | Publication date |
---|---|
EP3842162C0 (en) | 2023-08-02 |
EP3842162B1 (en) | 2023-08-02 |
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