Copper foil winding apparatus

Abstract

The present disclosure relates to a copper foil winding apparatus comprising: a master roll having an outer surface that rotates about a shaft and winding a copper foil; and a pressing part for pressing the copper foil wound on the outer surface of the master roll.

Description

[0001] [DESCRIPTION]

[0002] [Invention Title]

[0003] Copper Foil Winding Apparatus

[0004] [Technical Field]

[0005] The present disclosure relates to a copper foil winding device.

[0006] [Background Art]

[0007] Copper foil is a high-precision metal foil used for manufacturing current collectors for secondary batteries, circuit boards for electronic circuits, or electronic components. It can be continuously produced through methods such as electroplating and is wound into a roll form for storage or transferred to the next process.

[0008] However, copper foil is very thin and has low mechanical strength, so if the tension is excessive or the winding surface is uneven during winding, defects such as wrinkles, bubbles, and tearing may occur, which can cause a decrease in product quality.

[0009] [Disclosure]

[0010] [Technical Problem]

[0011] The problem that the present disclosure aims to solve is to provide a copper foil winding device capable of preventing lifting of the copper foil through uniform pressure during the copper foil winding process.

[0012] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below.

[0013] [Technical Solution]

[0014] The present disclosure includes: a master roll whose outer surface rotates around an axis to wind a copper foil; and a pressing part that presses the copper foil wound on the outer surface of the master roll. The pressing part includes a pipe-shaped touch roll that presses the copper foil wound on the master roll.

[0015] It may include a pair of support bodies each coupled to both ends of the touch roll; and a driving unit that controls the movement of the pair of support bodies to adjust the pressing force of the touch roll.

[0016] The pair of support bodies may be extended perpendicularly to the central axis. Each of the pair of support bodies includes a tilt axis, and the driving unit can adjust the pressing force of the touch roll by rotating the pair of support bodies around the tilt axis.

[0017] The above pair of support bodies each further includes a first support arm connected to the driving unit; and a second support arm connected to the touch roll; and the tilt axis may be positioned between the first support arm and the second support arm.

[0018] The first support arm and the second support arm can each be rotatably coupled with the tilt axis.

[0019] The above driving unit may include an actuator that generates driving force using compressed air, hydraulic or electric energy, and a rod connected to the actuator to transmit the driving force to the pair of support bodies.

[0020] The rod moves linearly according to the operation of the actuator, and the pair of support bodies rotate due to the linear movement of the rod, and the pressing force of the touch roll can be adjusted by the rotation of the pair of support bodies.

[0021] The touch roll presses the copper foil wound on the master roll by its own weight, and as the touch roll moves away from the master roll according to the operation of the driving unit, the pressing force of the touch roll can be gradually reduced.

[0022] The touch roll may include an inner shaft coupled to the pair of support bodies; and a touch body rotatably coupled to the inner shaft.

[0023] The length of the touch body along the above axial direction may be greater than or equal to the length of the master roll.

[0024] The above touch roll may be in the shape of a pipe.

[0025] The touch body includes a first hole, and the first hole extends parallel to the inner axis, and the inner axis can be inserted into the first hole.

[0026] The touch body includes a second hole, the second hole extends parallel to the inner axis, and the second hole may be positioned between the first hole and the outer surface of the touch body.

[0027] The touch roll further includes a protective cover, and the protective cover may be ring-shaped. The protective cover may cover the second hole.

[0028] The diameter of the touch roll may be in the range of 40 mm to 150 mm.

[0029] [Advantageous Effects]

[0030] According to one embodiment of the present disclosure, a copper foil winding device can be provided that prevents lifting of the copper foil through uniform pressure during the copper foil winding process.

[0031] However, the effects obtainable through the present invention are not limited to the effects described above, and other technical effects not mentioned will be clearly understood by a person skilled in the art from the description of the invention below.

[0032] [Description of Drawings]

[0033] FIGS. 1 and 2 illustrate a pressurizing member applying pressure to a master roll according to one embodiment of the present disclosure.

[0034] FIG. 3 illustrates a touch roll according to one embodiment of the present disclosure.

[0035] FIG. 4 illustrates a front view of a touch roll according to one embodiment of the present disclosure.

[0036] FIG. 5 illustrates a touch roll combined with a protective cover according to one embodiment of the present disclosure.

[0037] FIG. 6 illustrates a copper foil being wound onto a master roll according to one embodiment of the present disclosure.

[0038] FIG. 7 is a perspective view of a copper foil winding device according to one embodiment of the present disclosure.

[0039] FIG. 8 is a side view of a copper foil winding device according to one embodiment of the present disclosure.

[0040] [Mode for Invention]

[0041] Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively.

[0042] Specific terms used in this specification are for convenience of explanation only and are not intended to limit the exemplified embodiments.

[0043] For example, expressions such as “identical” and “identical” indicate not only a strictly identical state, but also a state in which there is a tolerance or a difference in the degree to which the same function is obtained.

[0044] For example, expressions indicating relative or absolute arrangements such as “in a certain direction,” “along a certain direction,” “parallel,” “perpendicular,” “to the center,” “concentric,” or “coaxial” not only strictly indicate such arrangements, but also indicate a state of relative displacement with a tolerance or an angle or distance such that the same function is obtained.

[0045] To explain the present disclosure, the following description is based on a spatial orthogonal coordinate system formed by mutually orthogonal five axes, the Y-axis, and the Z-axis. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) refers to both directions in which each axis extends.

[0046] The five directions, five directions, and Z direction mentioned below are for the purpose of explaining the present disclosure so that it can be clearly understood, and it goes without saying that each direction may be defined differently depending on where the reference is placed.

[0047] The use of terms such as 'first, second, third,' etc., attached to the components mentioned below is intended solely to avoid confusion regarding the components being referred to, and is unrelated to the order, importance, or master-subordinate relationship between the components. For example, an invention including only the second component without the first component can also be implemented.

[0048] The terms used in this disclosure are for the description of specific embodiments and are not intended to limit the scope of the claims. As used in the description of embodiments and in the appended claims, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0049] FIGS. 1 and 2 illustrate a pressurizing member applying pressure to a master roll according to one embodiment of the present disclosure.

[0050] The copper foil winding device (1) of the present disclosure can wind a copper foil (10) supplied along a preset supply path. The copper foil winding device (1) of the present disclosure includes a master roll (100) that winds the copper foil (10) by rotating its outer surface around a central axis (110), and a pressing part (200) that presses the copper foil (10) wound on the outer surface of the master roll (100). The copper foil winding device (1) can wind a copper foil (10) moving along a preset supply path onto a rotating master roll (100). The master roll (100) is installed to be rotatable with respect to the central axis (110), and by winding the supplied copper foil (10) at a constant speed and tension, the copper foil (10) can be stably stacked in a roll shape.

[0051] The copper foil winding device (1) of the present disclosure may further include a pressure member (200) that presses the copper foil (10) wound on the master roll (100) with a constant pressure from the outside. The pressure member (200) can prevent damage to the copper foil (10). For example, damage to the copper foil may mean that the surface is lifted or wrinkles are formed due to changes in tension, vibration, or air inflow at the beginning or during the winding of the copper foil (10). The pressure member (200) is positioned in a location that can contact the outer surface of the master roll (100) and can apply stable surface pressure to the surface of the copper foil (10) wound on the master roll (100). Through this, the pressure member (200) can improve the winding quality of the copper foil (10) without being directly coupled to the master roll (100). The above-mentioned pressurizing unit (200) can maintain the alignment of the copper foil (10) being wound and prevent interlayer separation by pressing the copper foil (10) with the master roll (100) with a constant load or controlled force.

[0052] In addition, the above-mentioned pressurizing part (200) may have a curved structure, a cylindrical structure, or a pipe structure capable of contacting the outer surface of the master roll (100), and may be positioned to deliver uniform pressure over the entire outer surface of the copper foil (10).

[0053] Referring to FIGS. 1 and 2, the master roll (100) may be formed in a cylindrical shape. The copper foil (10) may be wound on the outer surface of the master roll (100). The pressing part (200) may be positioned adjacent to the master roll (100) to press the copper foil (10).

[0054] FIG. 3 illustrates a touch roll according to one embodiment of the present disclosure, FIG. 4 illustrates a front view of a touch roll according to one embodiment of the present disclosure, FIG. 5 illustrates a touch roll with a protective cover attached according to one embodiment of the present disclosure, and FIG. 6 illustrates a copper foil being wound onto a master roll according to one embodiment of the present disclosure.

[0055] The above-mentioned pressure unit (200) may include a pipe-shaped touch roll (210) that pressures the copper foil (10) wound on the master roll (100), a pair of support bodies (220) each disposed at both ends of the touch roll (210), and a driving unit (230) that controls the movement of the pair of support bodies (220) to control the pressure of the touch roll (210).

[0056] The touch roll (210) may be rotatably installed. More specifically, the touch roll (210) may be configured so that its outer surface can rotate.

[0057] The touch roll (210) may be positioned parallel to the direction of the central axis (110) of the master roll (100) (e.g., the X-axis direction in FIG. 1). At this time, the axis of the touch roll (210) may be positioned parallel to the central axis (110) of the master roll (100).

[0058] Through this, the touch roll (210) can prevent localized pressure concentration that may occur during the winding process of the copper foil (10) by applying uniform surface pressure to the copper foil (10). In addition, as the outer surface of the touch roll (210) rotates according to the movement of the copper foil (10), a constant surface pressure can be applied continuously without hindering the winding of the copper foil (10).

[0059] The touch roll (210) may include an inner shaft (211) coupled to the pair of support bodies (220) and a touch body (213) coupled to the inner shaft (211) so as to be rotatable around the inner shaft (211). The inner shaft (211) may be installed in a fixed state on the pair of support bodies (220) so as not to rotate, and the touch body (213) may be installed so as to be rotatable around the inner shaft (211). Through this, the touch body (213) can naturally rotate along the direction of movement of the copper foil (10). This structure has the advantage of reducing resistance in the direction of travel of the copper foil (10), thereby preventing surface damage, friction, or wrinkling of the copper foil (10) during the winding process.

[0060] The length of the touch body (213) along the axial direction of the central axis (110) may be greater than the width of the copper foil (10). This allows the touch body (213) to apply uniform surface pressure over the entire width of the copper foil (10) wound onto the master roll (100). The length of the touch body (213) is set to cover the entire maximum width of the copper foil (10) wound onto the master roll (100), thereby preventing localized pressure concentration and ensuring uniform winding quality.

[0061] The diameter of the touch roll (210) may be in the range of 40 mm to 150 mm. The diameter of the touch roll (210) may affect the pressure applied by the pressure and load pressure due to its own weight, as well as rotational responsiveness. If the diameter of the touch roll (210) is smaller than 40 mm, it may lead to an increase in localized surface pressure. If the diameter of the touch roll (210) is larger than 150 mm, the weight of the touch roll (210) is large and the contact surface area is wide, so a stable and uniform pressure may be applied; however, due to the increase in rotational inertia, it may be difficult to fine-tune the rotational speed and difficult to respond to changes in the copper foil (10) transport speed. Considering these points, the diameter of the touch roll (210) may be in the range of 40 mm to 150 mm.

[0062] Referring to FIG. 3, the inner shaft (211) may be formed to be longer than the touch body (213). This allows the inner shaft (211) to be connected to the pair of support bodies (220). Additionally, the diameter (L1) of the touch roll (210) may be in the range of 40 mm to 150 mm.

[0063] The touch body (213) may be in the shape of a pipe. The inner shaft (211) may be inserted inside the touch body (213). The touch roll may further include a bearing. The bearing may be placed between the inner shaft (211) and the touch body (213). The bearing may be provided in a configuration that minimizes rotational friction resistance, such as a ball bearing, a roller bearing, or a sleeve bearing.

[0064] The touch body (213) may include a plurality of holes. The touch body (213) may include a hole extending parallel to the inner shaft (211). The inner shaft (211) may be inserted into the hole. In this specification, the hole into which the inner shaft (211) is inserted may be defined as a first hole (2131). The inner shaft (211) is inserted into the first hole (2131), and both ends of the inner shaft (211) may each protrude outside the touch body (213). Both ends of the inner shaft (211) may each be coupled to the pair of support bodies (220).

[0065] The touch body (213) may include a hole that extends parallel to the inner axis (211) and is disposed between the first hole (2131) and the outer surface of the touch body (213). In this specification, the hole disposed between the first hole (2131) and the outer surface of the touch body (213) may be defined as a second hole (2133). The second hole (2133) may be provided in multiple numbers. The multiple second holes (2133) may be disposed along the circumferential direction of the touch body (213).

[0066] For example, referring to FIG. 4, the cross-section of the touch body (213) may be such that the first hole (2131) is positioned in the center and the plurality of second holes (2133) are positioned along the circumferential direction of the touch body (213). Through this structure, the rigidity of the touch body (213) can be improved while the weight of the touch body (213) can be reduced.

[0067] The touch roll (210) may further include a protective cover (215). The protective cover (215) may be attached to both ends of the touch body (213) to restrict the axial movement of the internal components of the touch body (213). Referring to FIG. 5, the protective cover (215) may prevent the components of the touch body (213) from moving in the X-axis direction. For example, the bearing may be prevented from separating from the touch roll (210). This ensures that even if the touch roll (210) rotates around an axis, the position of the internal components of the touch body (213) is fixed and safely protected.

[0068] The above protection cover (215) can cover the second hole (2133). The protection cover (215) may be ring-shaped. When the protection cover (215) is formed in a ring shape, the inner diameter of the protection cover (215) may be greater than or equal to the outer diameter of the first hole (2131), and the outer diameter of the protection cover (215) may be less than or equal to the outer diameter of the second hole (2133).

[0069] The touch body (213) may further include a coupling part (216) connected to the inner shaft (211). The coupling part (216) may be coupled to the inner shaft (211). The coupling part (216) may be coupled to each end of the inner shaft (211). The coupling part (216) may be formed in a rod shape and may be coupled to the inner shaft (211) in the direction in which the inner shaft (211) extends. The inner shaft (211) may be easily coupled to the pair of support bodies (220) by the coupling part (216). The coupling part (216) may be coupled to the inner shaft (211) by a bolt coupling or a screw coupling, but the method of coupling is not limited.

[0070] Referring to FIG. 6, the copper foil (10) passes between the touch roll (210) and the master roll (100) and can be wound onto the master roll (100). At this time, the touch roll (210) presses the copper foil (10) to prevent the copper foil (10) from lifting or wrinkling. It is confirmed that wrinkles are formed on the surface of the copper foil (10) before the copper foil (10) passes between the touch roll (210) and the master roll (100). When the copper foil (10) passes between the touch roll (210) and the master roll (100), the wrinkles formed on the surface of the copper foil (10) can be removed.

[0071] In addition, the touch body (213) is formed longer than the copper foil (10) along the direction of the central axis (110) (e.g., the X-axis direction in FIG. 6), so that pressure can be applied uniformly over the entire copper foil (10).

[0072] FIG. 7 is a perspective view of a copper foil winding device (1) according to one embodiment of the present disclosure, and FIG. 8 is a side view of a copper foil winding device (1) according to one embodiment of the present disclosure.

[0073] Referring to FIG. 7, the pair of support bodies (220) may be positioned at each end of the touch roll (210). The pair of support bodies (220) may support the touch roll (210) from both sides. More specifically, the pair of support bodies (220) may be connected to each end of the inner axis (211) of the touch roll (210). The driving unit (230) may control the movement of the pair of support bodies (220) to adjust the pressure applied by the touch roll (210). The driving unit (230) may adjust the pressure applied by the touch roll (210) to the copper foil (10) by controlling the position of the touch roll (210). Specifically, the driving unit (230) may adjust the position of the touch roll (210) so that it moves closer to or further away from the master roll (100).

[0074] for example ,

[0075] The above driving unit (230) is linked with an automatic control device (not shown) and can control the position of the touch roll (210) in real time according to the winding state, thickness change, or production conditions of the copper foil (10).

[0076] Additionally, the driving unit (230) can control the touch roll (210) to continuously press the copper foil (10) even after moving the touch roll (210) to a target position. This prevents wrinkling or lifting of the copper foil (10) being wound.

[0077] Below, we will explain how the pressure of the touch roll (210) is controlled by the pair of support bodies (220) and the driving unit (230).

[0078] The above pair of support bodies (220) may include a tilt axis (221), a first support arm (225), and a second support arm (223). Each of the above pair of support bodies (220) includes a tilt axis (221), and the driving unit (230) can rotate the above pair of support bodies (220) around the tilt axis (221) to adjust the pressure of the touch roll (210). The angle at which the above pair of support bodies (220) are rotated may be 0 to 20 degrees or less. The tilt axis (221) may be located at the center of the above pair of support bodies (220). The above pair of support bodies (220) may be separated into two parts around the tilt axis (221). Each part of the pair of support bodies (220) divided by the tilt axis (221) can rotate by a predetermined angle around the tilt axis (221). This allows the pressure applied by the touch roll (210) to the copper foil (10) to be changed.

[0079] The driving unit (230) can rotate the pair of support bodies (220). The driving unit (230) can change the position of the pair of support bodies (220) and can rotate the pair of support bodies (220).

[0080] The above pair of support bodies (220) each further include a first support arm (225) connected to the drive unit (230) and a second support arm (223) connected to the touch roll (210), and the tilt axis (221) may be positioned between the first support arm (225) and the second support arm (223). Here, rotation of the pair of support bodies (220) may mean that the first support arm (225) and the second support arm (223) rotate around the tilt axis (221). Additionally, each part of the pair of support bodies (220) divided by the tilt axis (221) may be the first support arm (225) and the second support arm (223).

[0081] One end of the second support arm (223) may be connected to the touch roll (210), and the other end of the second support arm (223) may be connected to the tilt axis (221). One end of the first support arm (225) may be connected to the drive unit (230), and the other end of the first support arm (225) may be connected to the tilt axis (221). The second support arm (223) may be connected to the first support arm (225) through the tilt axis (221). Through this, the position of the second support arm (223) may change as the position of the first support arm (225) changes. The first support arm (225) and the second support arm (223) may each be rotatably coupled to the tilt axis (221).

[0082] The above driving unit (230) may include an actuator (233) that generates driving force using compressed air, hydraulic or electric energy, and a rod (231) connected to the actuator (233) to transmit the driving force to the pair of support bodies (220).

[0083] The actuator (233) may be provided in a cylindrical structure. The actuator (233) may be installed in a fixed state on a frame or support member and may transmit driving force through the rod (231). The rod (231) is a structure extending in the axial direction of the actuator (233) and may be connected to the first support arm (225) of the pair of support bodies (220) to change its position. Additionally, the actuator (233) may be configured to operate automatically according to an external control signal regarding the pressure position or pressure force. The driving unit (230) may further include an input unit (not shown) for receiving a signal from a user. When a control signal is applied to the input unit, the actuator (233) may be driven to raise the touch roll. For example, when a user inputs a control signal of 3 bar to the input unit, the actuator (233) can operate with an operating pressure of 3 bar to raise the touch roll (210). The rod (231) moves linearly according to the operation of the actuator (233), and the pair of support bodies (220) rotate due to the linear movement of the rod (231), and the pressure of the touch roll (210) can be adjusted due to the rotation of the pair of support bodies (220). In addition, the driving unit (230) according to another embodiment can be implemented in various mechanical ways in addition to a structure including the actuator (233) and the rod (231). For example, the driving unit (230) can convert rotational motion or eccentric motion into linear motion to rotate the first support arm (225).

[0084] The copper foil winding device (1) of the present disclosure may further include a guide roller (310) and an auxiliary roller (320). The copper foil (10) may be manufactured before the copper foil winding device (1) is used. The manufactured copper foil (10) may be wound by the copper foil winding device (1) of the present disclosure after passing through the auxiliary roller (320) and the guide roller (310) in sequence. A movement path of the copper foil (10) may be formed by the auxiliary roller (320) and the guide roller (310). The auxiliary roller (320) may be an idle roller.

[0085] The guide roller (310) can stably transport the copper foil (10) as it moves from the auxiliary roller (320) to the master roller (100). Additionally, it can prevent wrinkles from forming while the copper foil (10) is being wound. In the embodiment, the guide roller (310) can prevent wrinkles from forming by applying tension to the copper foil (10) by applying a predetermined pressure toward the bottom.

[0086] Referring to FIGS. 7 and 8, the rod (231) can be lowered and one end of the first support arm (225) can be lowered. At this time, the second support arm (223) can rotate around the tilt axis (221) and one end of the second support arm (223) can be raised. Through this, the touch roll (210) can maintain an appropriate pressure in real time according to the winding state of the copper foil (10), the thickness of the copper foil (10) itself, changes in tension, etc., and can effectively prevent quality degradation factors such as wrinkling, lifting, and eccentricity of the copper foil (10).

[0087] In other words, the touch roll (210) can apply pressure to the copper foil (10) wound on the master roll (100) by its own weight, and the pressure applied by the touch roll (210) can be gradually reduced according to the operation of the driving unit (230). Through this structure, excessive pressure can be prevented during the initial winding of the copper foil (10). During the winding process, the touch roll (210) is separated by the control of the driving unit (230) to gradually reduce the pressure, thereby maintaining consistency in winding quality while reducing damage to the copper foil (10). Additionally, since pressure can be applied even without the driving force acting when the touch roll (210) is being pressed by its own weight alone, a stable winding state can be maintained even in the event of a malfunction of the driving unit (230). Furthermore, if pressure is required, the drive unit (230) may intervene to apply additional pressure, and if necessary, the touch roll (210) may be completely separated from the master roll (100) to facilitate maintenance or roll replacement work.

[0088] The present disclosure may be modified and implemented in various forms, and the scope of rights is not limited to the embodiments described above. The above description is merely an example of applying the principles of the present disclosure, and other configurations may be further included without departing from the scope of the present invention.

[0089] Explanation of drawing symbols

[0090] 1: Copper foil winding device

[0091] 10: Copper foil

[0092] 100: Master Roll

[0093] 200: Pressurized part

Claims

[CLAIMS]

1. In a copper foil winding device that winds copper foil supplied along a preset supply path, A copper foil winding device comprising: a master roll whose outer surface rotates around a central axis to wind the copper foil; and a pressing part that presses the copper foil wound on the outer surface of the master roll.

2. In Paragraph 1, The above pressurizing part A pipe-shaped touch roll for pressing the copper foil wound on the master roll; a pair of support bodies each coupled to both ends of the touch roll; and A copper foil winding device comprising: a driving unit that controls the movement of the pair of support bodies to adjust the pressing force of the touch roll.

3. In Paragraph 2, The above pair of support bodies is a copper foil winding device extending perpendicularly to the central axis.

4. In Paragraph 2, The above pair of support bodies each include a tilt axis, and A copper foil winding device in which the driving unit rotates the pair of support bodies around the tilt axis to adjust the pressing force of the touch roll.

5. In Paragraph 4, The above pair of support bodies each further includes a first support arm connected to the driving unit; and a second support arm connected to the touch roll. The above tilt axis is a copper foil winding device disposed between the first support arm and the second support arm.

6. In Paragraph 5, The above-mentioned first support arm and the above-mentioned second support arm are each rotatably coupled to the above-mentioned tilt axis, forming a copper foil winding device.

7. In Paragraph 2, A copper foil winding device comprising an actuator that generates driving force using compressed air, hydraulic or electric energy, and a rod connected to the actuator to transmit the driving force to the pair of support bodies.

8. In Article 7, The above rod moves linearly according to the operation of the above actuator, and A copper foil winding device in which the pair of support bodies rotate by the linear movement of the above-mentioned rod, and the pressing force of the touch roll is adjusted by the rotation of the pair of support bodies.

9. In Paragraph 8, A copper foil winding device in which the touch roll presses the copper foil wound on the master roll by its own weight, and the touch roll is separated from the master roll according to the operation of the driving unit so that the pressing force of the touch roll is gradually reduced.

10. In Paragraph 2, The above touch roll is An inner shaft coupled to the above pair of support bodies; and A copper foil winding device comprising a touch body rotatably coupled around the inner axis.

11. In Article 10, A copper foil winding device in which the length of the touch body along the axial direction of the central axis is greater than the width of the copper foil.

12. In Article 10, The above touch body is a pipe-shaped copper foil winding device.

13. In Article 10, A copper foil winding device wherein the touch body comprises a first hole, the first hole extends parallel to the inner axis, and the inner axis is inserted into the first hole.

14. In Paragraph 13, A copper foil winding device wherein the touch body includes a second hole, the second hole extends parallel to the inner axis, and the second hole is disposed between the first hole and the outer surface of the touch body.

15. In Paragraph 14, The above touch roll further includes a protective cover, and The above protection. The cover is a ring-shaped copper foil winding device.

16. In Paragraph 15, The above protection. The cover is a copper foil winding device that covers the above second hole.

17. In Paragraph 2, A copper foil winding device in which the diameter of the touch roll is within the range of 40 mm to 150 mm.

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