Detector head, side edge detector and manufacturing device

Abstract

To provide a manufacturing device which manufactures a detector head which accurately determines a side edge position of a long material, a side edge detector and a long material.SOLUTION: A detector head (32) of a pneumatic type side edge detector for detecting the position of a side edge (K) of a long material, for example, a thin film material has a head part (38) and a detection range (40). A first flange (42) and a second flange (44) of the detector head (32) both include a detection end (50) for forming a fluid port (46) having an opening (54), a conduit (48) and the detection range (40). The detection range (40) is fluid-connected to the fluid port (46) of the first flange (42) and the second flange (44) by a plurality of openings (54) and a plurality of conduits (48) of the corresponding first flange (42) and the second flange (44). The side edge detector and a device are also disclosed.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a pneumatic side edge detector, a detector head, and a manufacturing apparatus for manufacturing long material. [Background technology]

[0002] Manufacturing machines for manufacturing long pieces that are guided according to a number of manufacturing steps are known. Various different guide devices are also known for gripping and moving the side edges of the long pieces for manufacturing purposes. However, since the position of the long piece and the position of its side edges constantly change during operation of the manufacturing machine, it is necessary to constantly measure the position of the side edges of the long piece. For measurement purposes, pneumatic side edge detectors are known that use detector heads to detect the side edge detection zones of the moving long piece.

[0003] In a known detector head, compressed air is introduced into one side of the detection area of ​​a pneumatic side edge detector for detecting the side edges of long materials, i.e., above the long material, and the air pressure is measured on the opposite side of the detection area, i.e., on the opposite side of the detection area.However, since the air pressure measured at the side edge position of the long material does not change linearly, it is difficult to accurately determine the side edge position at which the correct air pressure is measured with conventional pneumatic side edge detectors. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a detector head, a side edge detector, and a manufacturing apparatus for manufacturing elongated materials that accurately determine the side edge positions of elongated materials. [Means for solving the problem]

[0005] The object of the present invention is achieved by a detector head for a pneumatic edge detector, which includes a head and a detection area and detects the side edge position of a long material, i.e., a thin film material. The detector head head includes a first jaw, a second jaw, and a detection area disposed between the first and second jaws. Each of the first and second jaws includes a fluid port, a plurality of conduits, and a detection area having a plurality of openings. The detection ends formed on the first and second jaws form a detection area that is in fluid contact with the fluid port of the first jaw. The plurality of openings and conduits in the detection area of ​​the first jaw are in fluid contact with the fluid port of the first jaw, and the plurality of openings and conduits in the detection area of ​​the second jaw are fluidly connected to the fluid port of the second jaw.

[0006] Using multiple conduits and corresponding openings in the detection area of ​​the detector head, compressed air is introduced into the detection area and ejected from the multiple conduits along the wide area of ​​the detection area, with the compressed air flowing into the opposing openings and conduits simultaneously forming a uniform flow in the detection area.

[0007] In this way, a wide detection area is used to measure the presence or absence of the side edge of the elongated material, allowing for a detection area with a large gap relative to the side edge of the elongated material. At the same time, the linearity of the pressure drop associated with the displacement or change of the side edge of the elongated material is improved, making it possible to significantly more accurately measure.

[0008] The elongated member can be made of a plastic film, paper, fabric, or other woven or stretchable material. For example, each of the plurality of conduits opens into one of the openings in the detection area of ​​the corresponding jaw, thereby providing complete fluid communication with the airflow passing through the detection area formed between the corresponding first and second jaws.

[0009] The conduits may be tapered towards the opening, e.g., with a larger opening width at the end towards the fluid port of the opening. In this way, the flow characteristics are further improved. In an embodiment of the invention, the conduits may be at least partially arc-shaped, e.g., forming an angle between 80° and 100°, e.g., 90°, thereby reliably avoiding turbulence that would impair the quality of measurements in the case of curved fluid connections.

[0010] To further reduce turbulence and improve the quality of the measurements, the conduit may be provided with a length greater than 5 mm, for example greater than 10 mm and / or greater than three times the width of one of the apertures.

[0011] In an embodiment of the invention, the opening direction of the fluid inlets of the first and / or second jaws is angled, e.g., perpendicular to the opening direction of the detection area openings of the first and / or second jaws. In this way, the openings of the detection areas of the first and second jaws of the detector head can be simply fluidly connected. The opening direction of the fluid inlets can extend in a longitudinal direction, a lateral direction, or a perpendicular direction. For example, the opening directions of the fluid inlets of the first and second jaws extend parallel to each other, facing each other.

[0012] In an embodiment of the invention, the detection areas of the first and second jaws are arranged opposite each other, e.g., parallel to each other. In this way, a linear air flow path can be formed through the detection areas, further improving the accuracy or quality of the pressure measurements. For example, a linear air flow path can allow the detection areas to be flat and / or located on only one side of the corresponding first and second jaws.

[0013] In an embodiment of the present invention, the detection areas of the first and second jaws are spaced apart from one another in the vertical direction of the detector head, and the openings in the detection areas of the first and / or second jaws are positioned adjacent to one another in the longitudinal and / or lateral directions, thereby creating a uniform airflow across the detection area formed between the first and second jaws.

[0014] For example, the plurality of openings in the detection area of ​​the first jaw and / or the second jaw may be arranged in at least one extending row, e.g., longitudinally, so that the air flow through the detection area is uniform, e.g., longitudinally, and the linearity of the measurements may be further improved or increased.

[0015] In an embodiment of the present invention, at least two rows of apertures are laterally adjacent to each other and are arranged in a regular grid with their centers. Measurement accuracy can be further increased through the use of additional rows. For example, two adjacent rows of apertures are offset from each other to form as complete a detection area as possible.

[0016] For example, two rows of apertures, each with five apertures, are provided in each detection zone. More or fewer apertures may be provided in each of the two rows with more or fewer than five apertures. In an embodiment of the invention, the apertures in the detection zones of the first and second jaws are coaxially positioned with each other to further reduce turbulence and further improve the accuracy or quality of the measurements.

[0017] In an embodiment of the present invention, for example, the first jaw and second jaw are provided as a single piece, and because the entire detector head is a single piece, the detection area openings are precisely aligned with each other without the need for any adjustments.

[0018] For example, the detector head may be manufactured from a resin material by additive manufacturing processes such as 3D printing. For example, polyamide 12 (PA12) may be a suitable material for 3D printing and / or multi-jet fusion may be used as a manufacturing process.

[0019] One could consider manufacturing the head using 3D printing techniques using polyether ether ketone (PEEK), polyether ketone ketone (PEKK), aluminum, or steel. Other materials that can withstand temperatures above 80°C could also be used. Similarly, one could consider using stereolithography (SLA) or selective laser sintering (SLS).

[0020] For example, if the side edge of the elongated material can be guided into the detection area between the two jaws that form the C-shape of the head when observed from the side, head shapes other than C-shape can also be used.

[0021] In some embodiments of the invention, the expansion chambers formed in the first and / or second jaws can open the conduits of the corresponding jaws' fluid ports and openings. The compressed air flow can be distributed evenly and independently through the expansion chambers to all conduits or additional conduits connected to all conduits. For example, the expansion chambers and conduits can form a fluid connection.

[0022] The objects of the present invention are achieved by a side edge detector for detecting the position of a side edge of an elongated material, such as a thin film material. The side edge detector includes a detector head, a compressed air source, and a pressure detector, the compressed air source and the pressure detector being fluidly connected to different openings in the detector head. The features and advantages of the detector head equally apply to the side edge detector, and vice versa.

[0023] The fluid connection may be made by a fluid line, such as a pipe and / or a conduit. The object of the present invention is also achieved by an apparatus, such as a thin film manufacturing apparatus, for manufacturing a length of edge material that is inserted into a detection area formed between a first jaw and a second jaw. The features and advantages of the detector head and / or edge detector equally apply to the thin film manufacturing apparatus, and vice versa. [Brief explanation of the drawings]

[0024] Other features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which: [Figure 1] 1 is a perspective view of a long material manufacturing apparatus including a side edge detector having a detector head according to an embodiment of the present invention; FIG. [Figure 2] FIG. 2 is a side view of a pair of side edge detectors of FIG. 1 positioned at the left and right entrance areas of a furnace; [Figure 3] 3 is a perspective view of the detector head of the edge detector shown in FIG. [Figure 4] Cross-sectional view of the detector head of the edge detector shown in Figure 3 DETAILED DESCRIPTION OF THE INVENTION

[0025] 1 shows a perspective view of an apparatus 10 for manufacturing a long material B, which comprises a number of different associated devices. The illustrated example of the manufacturing apparatus 10 for illustrative purposes of the present invention shows a thin film manufacturing apparatus, which does not limit the scope of protection of the present invention.

[0026] In this embodiment, the elongated material B is a thin resin film. A paper material, a woven fabric, a knitted fabric, or other stretchable material can be used as the elongated material B. In the illustrated example, the manufacturing apparatus 10 includes an extrusion device 12, a casting and rolling device 14, at least one stretching device, for example, a machine direction orienter 16 (MDO) and a transverse direction orienter 18 (TDO), a tension roller device and / or a side edge treatment device 20, and a winding device 22.

[0027] The thin film produced by the production apparatus 10 is a biaxially oriented thin film such as biaxially oriented polypropylene (BOPP), biaxially oriented polyethylene terephthalate (BOPET), biaxially oriented polyamide thin film (BOPA), biaxially oriented polyethylene thin film (BOPE), biaxially oriented polylactic acid thin film (BOPLA), biaxial battery thin film (BOPP-C) or battery separator thin film (BSF).

[0028] The resin thin film is produced by feeding a thin film extruded from the extrusion device 12 onto the chill rolls of the casting and rolling device 14. For production purposes, the extrusion device 12 produces a molten resin which is fed from a granular starting material onto the chill rolls and formed into a thin film.

[0029] The film is conveyed from the casting mill 14 as a length B to the machine direction orienter 16. In the machine direction orienter 16, the film is stretched in the machine direction to form a thinner film. In the machine direction orienter 16, the film passes through a number of heated rolls to heat the film to a temperature suitable for stretching.

[0030] The film is sandwiched between at least two rollers in the machine direction orienter 16 and stretched in the machine, or tensile, direction to form a stretched film. The resulting film is transported from the machine direction orienter 16 to the cross direction orienter 18, where it is stretched in the cross direction. The cross direction orienter 18 includes a furnace 26 with different processing zones along the tensile direction of the manufacturing apparatus 10 for processing the film.

[0031] In the first zone, called the preheat zone, the thin film is heated by a heating furnace 26. In the second zone (the "stretch zone"), the thin film is stretched laterally so that at the end of the second zone, the lateral width of the thin film increases and the thickness of the thin film decreases compared to the entrance of the second zone.

[0032] Once the stretching process is complete, the film passes through a third and subsequent zones (e.g., a "heat treatment zone," a "reheat zone," and / or an "anneal zone" where internal stresses in the film are relieved at high temperatures), and finally, an additional zone (the "cooling zone") where the film is cooled.

[0033] Neutral zones are provided to separate the multiple zones. The neutral zones are, for example, empty spaces with no ventilation function. The multiple zones of the lateral director 18 can be divided into different shapes and / or have different lengths. For example, fewer or shorter neutral zones can be provided, or additional neutral zones can be arranged in other respects, with the remaining zones modified.

[0034] Following the transverse direction orienter 18, the biaxially stretched film can be conveyed through a tension roller arrangement and / or a side edge treatment device 20, and the film can be wound onto a winding device 22. Alternatively, for example, the manufacturing apparatus 10 can be provided with a co-stretching device 19 having a heating furnace 26 as the stretching device in addition to or instead of the machine direction orienter 16 and / or the transverse direction orienter 18. In this manner, the elongated material B in the manufacturing apparatus 10 can be guided to a plurality of side edge detectors 28 provided in the manufacturing apparatus 10.

[0035] By disposing a plurality of side edge detectors 28 at different positions in the manufacturing apparatus 10, the side edge positions of the elongated material B can be determined at the positions of the side edge detectors 28. For example, determining the position of the side edge detectors 28 is important when winding the elongated material B on the winding device 22 or when introducing the elongated material B into the heating furnace 26 of the transverse orienter 18. For example, positioning the side edge treatment device 20 is important in order to accurately detect the side edge positions of the elongated material B and to position the side edge treatment device 20.

[0036] 2 illustrates in three dimensions the entrance area of ​​the lateral orienter 18 to the heating furnace 26. The lateral orienter 18 includes two guide devices 29 spaced apart from each other at a fixed distance and guiding the side edges of the elongated material B.

[0037] The moving device 30 allows each of the multiple guiding devices 29 to move laterally toward and away from the long material B. Each guiding device 29 is also equipped with a side edge detector 32 that detects the side edge position of the long material B. A detection signal from the side edge detector 32 that detects the side edge position of the long material B is used by the moving device 30 as a variable signal to adjust the position of the guiding device 29.

[0038] The illustrated edge detectors 28 include a detector head 32, a compressed air source 34, and a pressure detector 36. Each edge detector 28 includes at least one detector head 32 and one pressure detector 36. Multiple edge detectors 28 include a shared compressed air source 34.

[0039] The compressed air source 34 is connected to the detector head 32 by a fluid line, such as piping and / or conduit. The detector head 32 is further connected to the pressure detector 36 by a fluid line. The detector head 32 is shown in cross section in Figure 4, with two rows of openings 54, shown diagrammatically in Figure 3. The detector head 32 comprises a head 38 and a detection area 40 defined by the head 38. The head 38 comprises a first section, or first jaw 42, and a second section, or second jaw 44, i.e., the first second jaw 42 and the second second jaw 44.

[0040] In the illustrated embodiment, the first jaw 42 and the second jaw 44 are formed as a single unit, e.g., the entire detector head 32 is formed as a single unit. The head 38, the first jaw 42, and the second jaw 44 are fabricated, for example, from a resin and manufactured by an additive manufacturing process, e.g., three-dimensional printing. Polyamide 12 (PA12) is suitable for three-dimensional printing and / or multi-jet fusion manufacturing.

[0041] 3D printing of the head can be considered using polyether ether ketone (PEEK), polyether ketone ketone (PEKK), aluminum, or steel. Other materials that can withstand temperatures above 80°C can also be used.

[0042] Similarly, stereolithography (SLA) or selective laser sintering (SLS) may be considered for manufacturing the head 38. Similarly, the head may be manufactured by resin casting or metal casting. The head 38 may be manufactured by fastening or connecting the first jaw 42 and the second jaw 44, which are manufactured as separate parts, to each other.

[0043] The detector head 32 has a longitudinal direction L, a lateral direction Q, and a vertical direction H. The elongated material B, which extends in the longitudinal direction L and the lateral direction Q, moves in the lateral direction Q. Accordingly, the side edge K of the elongated material B also moves in the lateral direction Q. The first jaw 42 and the second jaw 44 are spaced apart from each other in the vertical direction H. For example, the head 38 has a C-shape in the lateral direction when viewed from the side.

[0044] The first jaw 42 and the second jaw 44 each include a fluid port 46, a plurality of conduits 48, a detection end 50, and an optional expansion chamber 52. The plurality of fluid ports 46 are provided on the opposite side of the elongated material B in the longitudinal direction L of the head 38. The direction in which the plurality of fluid ports 46 open is the longitudinal direction L of the head 38. However, the fluid ports 46 may also open in the lateral direction Q or the vertical direction H. Similarly, the fluid ports 46 may also open in the lateral direction Q and / or the vertical direction H in addition to the longitudinal direction L of the head 38.

[0045] In the illustrated example, the opening directions of the multiple fluid ports 46 extend parallel to one another. Alternatively, the opening directions of the multiple fluid ports 46 do not have to extend parallel to one another. At the end of the head 38, the first jaw 42 and the second jaw 44 each form a detection end 50 that is spaced apart from the elongated material B. Each of the multiple detection ends 50 has a plurality of openings 54.

[0046] In the illustrated embodiment, the detection ends 50 of the first jaw 42 and the second jaw 44 extend parallel to each other in the lateral direction Q and the longitudinal direction L to the elongated material B. For example, the detection end 50 that detects the presence or absence of airflow ejected from at least one opening 54 of the first jaw 42 and the second jaw 44 is formed on a flat surface. In the illustrated embodiment, the detection end 50 is disposed on only one side of the corresponding first jaw 42 or second jaw 44 and does not extend to the opposite side.

[0047] In the illustrated embodiment, the multiple detection ends 50 are spaced apart from one another in the vertical direction H and are provided on opposite sides of the detection area 40. The detection area 40 provided between a pair of detection ends 50 in the vertical direction H is open in the longitudinal direction L and the lateral direction Q. The size and direction of the detection area 40 are determined by the dimensions of the detection end 50 in the longitudinal direction L and the lateral direction Q, for example, the length of the region of the detection end 50 having the multiple openings 54.

[0048] A plurality of openings 54 are provided in the sensing end 50, which comprises a number of openings 54 exactly as the conduits 48 of the corresponding first jaw 42 and second region 44. In the illustrated embodiment, the plurality of openings 54 open vertically at the sensing end 50, for example.

[0049] The openings 54 of each detection end 50 shown in Figure 3 are arranged as rows of openings 54 extending in the longitudinal direction L. In the illustrated embodiment, five openings 54 are provided in each row. In the illustrated embodiment, two rows of openings 54 are provided in the lateral direction Q.

[0050] In the illustrated embodiment, each sensing end 50 has ten apertures 54 arranged in a regular grid pattern. The apertures 54 are arranged adjacent to one another. The apertures 54 in adjacent rows can be offset in the length direction L. The offset spacing between the apertures 54 corresponds to half the gap (from midpoint to midpoint) between two apertures 54 in a row.

[0051] As shown in Figure 4, each sensing end 50 of the first jaw 42 and the second jaw 44 has a corresponding opening 54. The corresponding openings 54 of the first jaw 42 and the second jaw 44 are aligned with each other. The expansion chamber 52 and the conduit 48 fluidly connect each fluid port 46 of the first jaw 42 and the second jaw 44 to the opening 54 of the sensing area 40. The opening of each fluid port 46 opens into the expansion chamber 52. The expansion chamber 52 is a cavity within the first jaw 42 or the second jaw 44.

[0052] The conduits 48 of the first jaw 42 and the second jaw 44 are connected to the expansion chambers 52 of the first jaw 42 and the second jaw 44. For example, the conduits 48 extend from the sides of the expansion chambers 52 opposite the fluid port 46. The conduits 48 open into openings 54 of the corresponding first jaw 42 and second jaw 44. The conduits 48 extending from the expansion chambers 52 initially extend parallel to each other in the length direction L, and then curve in an arc toward the detection end 50.

[0053] In an alternative embodiment in which the sensing ends 50 and openings 54 of the first and second jaws 42, 44 are spaced apart in the vertical direction H, the conduit 48 can extend in a non-circular arc. In the illustrated embodiment, the conduit 48 extends at a 90° angle, although the sensing ends 50 can extend at an angle between 80° and 100°.

[0054] The conduit 48 has regions of the openings 54 that extend parallel to one another. The curved portions of the conduit 48 in the first jaw 42 and the second jaw 44 may have curved configurations with different angles. The length of the conduit 48 is greater than three times the width of one of the openings 54. Alternatively or additionally, the length of the conduit 48 is greater than 5 mm, for example, greater than 10 mm.

[0055] The conduit 48 can be tapered toward the opening 54. For example, the diameter of the conduit 48 toward the expansion chamber 52 has an opening width that is greater than the diameter of the conduit 48 at the opening 54. In this manner, the first jaw 42 provides a complete fluid connection from the expansion chamber 52 to the detection zone 40 via the fluid port 46 and the tapered cross-section of the conduit 48.

[0056] Similarly, a fluid connection is formed extending within the second jaw 44 from the fluid port 46 of the second jaw 44 through the conduit 48 to the detection area 40. For example, the fluid connection may include the expansion chamber 52 and the conduit 48 of the second jaw 44. The detector head 32 is fluidly connected to the compressed air source 34 and the pressure detector 36 by, for example, a flow path in the fluid connection, and measures and detects the position of the side edge K of the elongated material B by the air pressure received at the opening 54 of the conduit 48.

[0057] For example, the fluid port 46 of the first jaw 42 is fluidly connected to the compressed air source 34 via a fluid line, and the fluid port 42 of the second jaw 44 is fluidly connected to the pressure detector 36 via a fluid line. Compressed air is introduced into the detection area 40 through the fluid port 46 of the first jaw 42, the expansion chamber 52, the conduit 48, and the opening 54, and at the same time, the air pressure discharging from the opening 54 of the first jaw 42 to the detection area 40 is supplied to the pressure detector 36 through the opening 54 of the second jaw 44, the conduit 48, the expansion chamber 52, and the fluid port 46 of the second jaw 44, and the pressure detector 36 determines the pressure value at the detection end 50 of the second jaw 44.

[0058] Thus, the fluid port 46 of the second jaw 44 is fluidly connected to the compressed air source 34, and the pressure port 46 of the first jaw 42 is also fluidly connected to the pressure detector 36. The long material B, for example, the side edge K of the long material B, is guided into the detection area 40 shown in Figure 4, and the pressure value measured and detected by the pressure detector 36 changes depending on the position of the side edge K of the long material B relative to the detection area 40.

[0059] As a result, due to the position of the side edge K of the elongated material B covering the multiple openings 54, the compressed air ejected from the openings 54 of the second jaw 44 (or the first jaw 42) does not reach the corresponding openings 54 of the detection end 50 of the second jaw 44 (or the first jaw 42). When the side edge K of the elongated material B is not positioned in the detection area 40, the pressure determined by the pressure detector 36 is smaller than when the side edge K is positioned in the detection area 40, and when the pressure determined by the pressure detector 36 is low, the side edge K of the elongated material B is positioned in the detection area 40.

[0060] The pressure value measured by the pressure detector 36 can be used to determine the position of the side edge K of the elongated material B within the detection zone 40, and when the pressure value of the pressure detector 36 is low, the side edge K of the elongated material B is moved further in the lateral direction Q toward the detection zone 40.

[0061] For example, a precision detector head 32 and a precision side edge detector 28 are provided through the use of conduits 48. Through multiple conduits 48, a uniform air flow is generated in the detection area 40, and good linearity can be achieved between the position of the side edge K within the detection area 40 and the air flow rate through the detection area 40. Multiple air flows guided through multiple conduits 48 or multiple openings 54 are not influenced by each other.

Claims

1. A detector head of a pneumatic side edge detector (28) having a detection area (40) for detecting the side edge position of a long material (B) and a head (38), The head (38) includes a first jaw (42), a second jaw (44), and a detection area (40) formed between the first jaw (42) and the second jaw (44); Each of the first jaw (42) and the second jaw (44) includes a fluid port (46), a plurality of conduits (48), and a sensing end (50) having a plurality of openings (54) formed therein; The sensing ends (50) of the first jaw (42) and the second jaw (44) form a sensing area (40); The detection area (40) is fluidly connected to a fluid port (46) formed in the first jaw (42), a plurality of conduits (48) formed in the first jaw (42), and at least a plurality of openings (54) formed in the first jaw (42); The detector head is characterized in that the detection area (40) is fluidly connected to a fluid port (46) formed in the second jaw (44), a plurality of conduits (48) formed in the second jaw (44), and at least a plurality of openings (54) formed in the second jaw (44).

2. 2. The detector head according to claim 1, wherein the elongated material (B) is a thin film material.

3. 2. The detector head of claim 1, wherein each of the plurality of conduits (48) opens into one of a plurality of openings (54) in the sensing ends (50) of the corresponding first and second jaws (42,44).

4. 2. The detector head of claim 1, wherein the plurality of conduits (48) form at least a partial arc.

5. 5. The detector head of claim 4, wherein the arc angle of the plurality of conduits (48) forming the arc ranges between 80 degrees and 100 degrees.

6. 2. The detector head of claim 1, wherein the plurality of conduits (48) have a length greater than 5 mm, a length greater than 10 mm, and / or a length greater than three times the width of one of the plurality of apertures (54).

7. 2. The detector head of claim 1, wherein the opening direction of the fluid port (46) of the first jaw (42) and / or the second jaw (44) is angled.

8. 8. The detector head of claim 7, wherein the opening direction of the fluid port (46) of the first jaw (42) and / or the second jaw (44) is perpendicular to the opening direction of the opening (54) of the detection end (50) of the fluid port (46) of the first jaw (42) and / or the second jaw (44).

9. 2. The detector head of claim 1, wherein the sensing ends (50) of the first jaw (42) and / or the second jaw (44) are positioned opposite each other.

10. 10. A detector head as claimed in claim 9, wherein the sensing ends (50) of the first jaw (42) and / or the second jaw (44) are parallel to each other.

11. 2. The detector head of claim 1, wherein the sensing end (50) is flat and / or is provided on only one side of the corresponding first jaw (42) or second jaw (44).

12. the sensing ends (50) of the first jaw (42) and the second jaw (44) are spaced apart from each other in a vertical direction (H) of the detector head (32); 2. The detector head of claim 1, wherein the plurality of openings (54) in the detecting end (50) of the first jaw (42) and / or the second jaw (44) are arranged adjacent to one another in the length direction (L) and / or the width direction (Q).

13. 2. The detector head of claim 1, wherein the plurality of openings (54) in the sensing end (50) of the first jaw (42) and / or the second jaw (44) are arranged in at least a row.

14. 14. A detector head according to claim 13, wherein the plurality of apertures (54) in at least two rows are arranged adjacent to each other in the lateral direction (Q).

15. 2. The detector head of claim 1, wherein the plurality of openings (54) in the sensing ends (50) of the first jaw (42) and second jaw (44) are coaxially positioned with respect to one another.

16. 2. The detector head of claim 1, wherein the first jaw (42) and the second jaw (44) are constructed as a single piece.

17. 2. The detector head of claim 1, wherein the fluid ports (46) and conduits (48) of the first jaw (42) and / or the second jaw (44) open into an expansion chamber (52) provided in the first jaw (42) and / or the second jaw (44).

18. 18. The detector head of claim 17, wherein the fluid port (46) and the conduit (48) open into the expansion chamber (52) on opposite sides.

19. 2. A side edge detector for detecting the position of a side edge (K) of a long material (B), comprising a detector head (32), a compressed air source (34), and a pressure detector (36) according to claim 1, An edge detector characterized in that the compressed air source (34) and the pressure detector (36) are fluidly connected to different fluid ports (46) of the detector head (32).

20. 20. An apparatus for manufacturing a long material (B), comprising the side edge detector (28) according to claim 19.

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