Large size window protection assembly

Abstract

The utility model relates to a kind of large-size window protection components, the protection component from top to bottom includes surface layer protection film, window protection light-shielding composite layer, bottom layer protection film in sequence, window protection light-shielding composite layer includes the window protection film and light-shielding melinex frame composite with the lower surface of surface layer protection film, window protection film and light-shielding melinex frame lower surface are respectively compounded with window protection film self-own release film and melinex grid release film frame;Detection positioning hole mark line is formed at the four corners of the surface layer protection film respectively, and the distance difference between the center of two groups of detection positioning hole mark line distributed by two diagonal lines is less than or equal to 0.2mm.The utility model large-size window protection component is not under the premise of influencing main product structure, to diagonal line size difference value mode control confirmation product contour, reduce product measurement time, improve production efficiency and good product rate, reduce cost, the utility model process realizes product overall integration processing, can greatly improve production efficiency and capacity.

Description

Technical Field

[0001] This utility model relates to the field of precision die-cut component production technology, and specifically refers to a large-size window protection component. Background Technology

[0002] With the rapid development of products and devices using electronic display screens, such as laptops and televisions, screen protection and usage are receiving increasing attention. This is especially true for large-screen displays, which require corresponding large-screen protective components during assembly and use to provide dust and light protection for the viewing area. Existing large-screen components typically require a multi-stage die-cutting process followed by assembly. This method is not only inefficient in production and assembly but also results in poor product precision and a low yield rate. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a large-size window protection component.

[0004] The technical solution adopted by this utility model is: a large-size window protection component, which includes, from top to bottom, a top protective film, a window protection and light-blocking composite layer, and a bottom protective film. The window protection and light-blocking composite layer includes a window protective film and a light-blocking Mylar film frame laminated to the lower surface of the top protective film. The lower surfaces of the window protective film and the light-blocking Mylar film frame are respectively laminated with a release film integrated into the window protective film and a Mylar mesh release film frame. The light-blocking Mylar film frame is located around the window protective film, and the gap between the two is 0.35mm~0.50mm. The thickness of the film frame is greater than the thickness of the window protective film. The sum of the thicknesses of the light-shielding Mylar film frame and the Mylar mesh release film frame is greater than the sum of the thicknesses of the window protective film and the release film attached to the window protective film. The inner edge of the Mylar mesh release film frame does not contact the outer edge of the window protective film. The outer edge of the Mylar mesh release film frame extends outward by 3.0±1.0mm relative to the outer edge of the light-shielding Mylar film frame. Detection positioning hole marking lines are formed at the four corners of the surface protective film, and the difference in distance between the centers of the two sets of detection positioning hole marking lines distributed on the two diagonals is ≤0.2mm.

[0005] The two wide sides of the window protective film are respectively provided with window protective side strips that are isolated from the two sides of the window protective film body. The bottom edge of the window protective film is provided with a window protective bottom strip that contacts the bottom of the window protective film body. The gap between the window protective side strip and the window protective film body is 0.5±0.1mm, and the gap between the bottom end of the window protective side strip and the window protective bottom strip is 0.5±0.1mm. The top protective film has a protruding first handle portion at one corner; the bottom protective film has protruding second handle portions at both corners, and one of the second handle portions coincides with the outline of the first handle portion.

[0006] This utility model relates to a large-size window protection component. By adding four detection and positioning hole marking lines outside the main product outline within the component, the product outline shape is controlled and confirmed using diagonal dimensional differences without affecting the main product structure. This reduces product measurement time, improves production efficiency and yield, and ultimately lowers costs. Furthermore, the circular detection and positioning hole marking lines can also serve as a reference for positioning and assembly, enhancing the convenience and accuracy of assembly. This utility model's process achieves integrated product processing, significantly improving production efficiency and capacity, and increasing bonding efficiency. Precision dimensions are punched in a single pass, while other dimensions are punched in a nested manner, reducing assembly line risks. The use of a multi-station satellite rotary machine further reduces production line space and lowers costs. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the planar structure of a window protection component according to an embodiment of this utility model; Figures 1-1 to 1-4 yes Figure 1 Enlarged view of parts ABCD in the embodiment; Figure 2 , Figure 3 This is an exploded structural diagram of a single product according to an embodiment of this utility model; Figure 4 This is a schematic diagram of the process of this utility model; Figures 4-1 to 4-7 These are, respectively, the unfolded view of the blade rollers and the schematic diagram of the die-cutting effect of the first to seventh circular blade die-cutting roller groups in this utility model; Figure 4-8 yes Figures 4-2 to 4-7 A schematic diagram showing the superimposed die-cutting effects. Detailed Implementation

[0008] like Figure 1 , Figures 1-1 to 1-4 , Figure 2 , Figure 3As shown, this utility model describes a large-size window protection component. The component, from top to bottom, includes a top protective film 1, a window protection and light-blocking composite layer 2, and a bottom protective film 3. The window protection and light-blocking composite layer 2 includes a window protective film 21 laminated to the lower surface of the top protective film 1 and a light-blocking Mylar film frame 22. The lower surfaces of the window protective film 21 and the light-blocking Mylar film frame 22 are respectively laminated with a release film 211 (integrated with the window protective film) and a Mylar mesh release film frame 23. The light-blocking Mylar film frame 22 is located around the window protective film 21, and the gap between them is 0.35mm to 0.50mm. In this embodiment, the gap at the wide side is 0.39mm, and the gap at the long side is 0.49mm. The light-blocking... The thickness of the Mylar film frame 22 is greater than the thickness of the window protective film 21. The sum of the thicknesses of the light-shielding Mylar film frame 22 and the Mylar mesh release film frame 23 is greater than the sum of the thicknesses of the window protective film 21 and the release film 211 of the window protective film. The inner edge of the Mylar mesh release film frame 23 is exactly not in contact with the outer edge of the window protective film 21. The outer edge of the Mylar mesh release film frame 23 is 3.0±1.0mm outward relative to the outer edge of the light-shielding Mylar film frame 22. Detection positioning hole marking lines 11 are formed at the four corners of the surface protective film 1. The radius of the detection positioning hole marking lines 11 is 1mm±0.1mm, and the difference in distance between the centers of the two sets of detection positioning hole marking lines 11 distributed on the two diagonals is ≤0.2mm. By forming two sets of detection positioning hole marking lines 11 distributed along the diagonal on the surface protective film 1 during the manufacturing process, the dimensional accuracy of the product can be detected by the range of the difference in the diagonal distance between them, which can better realize accuracy detection and detection marking during the production process.

[0009] The two wide sides of the window protective film 21 are respectively provided with window protective side strips 213 that are isolated from the two sides of the window protective film body 212. The bottom edge of the window protective film 21 is provided with a window protective bottom strip 214 that contacts the bottom of the window protective film body 212. The gap between the window protective side strip 213 and the window protective film body 212 is 0.5±0.1mm, and the gap between the bottom end of the window protective side strip 213 and the window protective bottom strip 214 is 0.5±0.1mm. That is, the window protective film 21 is composed of a body, two side strips and a bottom strip. The outer edges of the two side strips and the bottom strip are exactly not in contact with the inner edge of the Mylar mesh release film frame 23. The top protective film 1 has a protruding first handle portion 12 at one corner; the bottom protective film 3 has protruding second handle portions 31 at each of its two corners, and one of the second handle portions 31 coincides with the outline of the first handle portion 12. The two handle portions can be formed at the same time and can be peeled off separately when in use.

[0010] Combination Figure 4 as well as Figures 4-1 to 4-8As shown, this utility model also provides a manufacturing process for the aforementioned large-size window protection component, which is carried out using a high-speed rotary die-cutting machine. The manufacturing process includes the following steps: Step a: Using the first backing film strip T1 composite surface protective film strip B1 (with their respective self-contained films T11 and B11 peeled off) running in the X direction as the main material strip, above the running main material strip, two X-direction light-blocking Mylar film strips Z1 (including the light-blocking Mylar main film strip Z11 and the first process release film strip Z12, with the first process release film strip Z12 facing upwards) are laminated at intervals on the second backing film strip T2 in the opposite direction; above the running direction of the X-direction light-blocking Mylar film strip Z1, the Y-direction light-blocking Mylar film strip Z2 (also including the light-blocking Mylar main film Z21 and the second process release film strip Z22, with the second process release film strip Z22 facing upwards) is laminated with... After the third backing film strip T3 is laminated, it undergoes its first die-cutting by the first circular die-cutting roller group M1. This first die-cutting separates the Y-direction light-blocking Mylar film strip Z2 into Y-direction light-blocking Mylar film strips along the Y direction. Then, through asynchronous transfer, these Y-direction light-blocking Mylar film strips are transferred intermittently (excluding the third backing film strip T3 during transfer) onto the lower X-direction light-blocking Mylar film strip Z1 and the second backing film strip T2. This results in the main body of the Y-direction light-blocking Mylar film strips being intermittently laminated onto the second backing film strip T2, while the two ends of the Y-direction light-blocking Mylar film strips are laminated onto the X-direction light-blocking Mylar film strip Z1. At this point, a preliminary (rectangular) light-blocking Mylar film frame is formed on the second backing film strip T2. Then, the Y-direction light-blocking Mylar film strips are further laminated onto the second backing film strip T2. Two first-row waste adhesive tapes P1 are laminated onto the second transition release film Z22 of the light-blocking Mylar film strip; then, the second backing film strip T2 and the light-blocking Mylar film composite strip on it are die-cut a second time by the second circular die-cutting roller group M2. The second die-cutting cuts out the two long edge lines M201 of the X-direction light-blocking Mylar film strip Z1 near the lower edge of the component and the inner long edge line M202 of the X-direction light-blocking Mylar film strip near the upper edge of the component. At the same time, the end of the Y-direction light-blocking Mylar film strip located on the X-direction light-blocking Mylar film strip is cut off. At the same time, the second die-cutting also forms the first positioning mark lines on the edges of the surface protective film strip B1 and the first backing film strip T1. M203; then the waste is removed. The waste includes the waste outside the long edge line M201 of the X-direction light-blocking Mylar film strip Z1 near the bottom of the component and all the first transition release film strip Z12. The first transition release film strip Z12 also has some waste from both ends of the Y-direction light-blocking Mylar film strip. At the same time, the second transition release film Z22 on the Y-direction light-blocking Mylar film strip is removed by the first row of waste tape P1. That is, after the second die-cutting and waste removal, the strips from bottom to top are: the second bottom film strip T2, the X-direction light-blocking Mylar film strip Z1 bonded to the second bottom film strip T2 in the X direction, and the Y-direction light-blocking Mylar film strip bonded to the second bottom film strip T2 in the Y direction.After the second die-cutting and waste removal, the strip is flipped by the first flipping roller F1 and then combined with the main strip running in the X direction. The combined main strip consists of the following layers from bottom to top: the first backing film strip T1, the top protective film strip B1, the X-direction light-blocking Mylar film strip Z1 and the Y-direction light-blocking Mylar film strip of the same layer, and the second backing film strip T2. There is some waste material at the inner edge of the X-direction light-blocking Mylar film strip. Step b: Remove the second backing film strip T2 from the top, then remove the X-direction light-blocking Mylar film waste at both ends of the Y-direction light-blocking Mylar film strip and the X-direction light-blocking Mylar film waste Z13 within the inner long edge line of the two X-direction light-blocking Mylar film strips through the second row of waste adhesive tape P2. Then attach the third transition release film strip G1, and the third transition release film strip G1 covers the X-direction light-blocking Mylar film strip Z1 and the Y-direction light-blocking Mylar film strip. At this time, the composite strips are arranged from bottom to top as follows: the first backing film strip T1, the surface protective film strip B1, the X-direction light-blocking Mylar film strip Z1 and the Y-direction light-blocking Mylar film strip of the same layer, and the third transition release film strip G1. The composite strip is then fed into... The third circular die-cutting roller group M3 of the multi-station satellite rotary machine performs the third die-cutting; the die-cutting rollers of the third die-cutting enter from above and die-cut two X-direction light-blocking Mylar films 221 and Y-direction light-blocking Mylar films 222 required for the finished light-blocking Mylar film frame 22 on the X-direction light-blocking Mylar film strip Z1 and the Y-direction light-blocking Mylar film strip, respectively forming the X-direction light-blocking Mylar film closed contour line M301 and the Y-direction light-blocking Mylar film closed contour line M302 on the X-direction light-blocking Mylar film strip Z1 and the Y-direction light-blocking Mylar film strip, and the X-direction light-blocking Mylar film closed contour line M301 and the Y-direction light-blocking Mylar film closed contour line M302 exactly cut through the light-blocking Mylar film; at the same time, the third die-cutting also preserves the surface layer Four detection positioning hole marking lines M303 are formed on the protective film strip B1, and these four detection positioning hole marking lines M303 are located on the outer side of the four corners of the light-shielding Mylar film frame. The four detection positioning hole marking lines M303 do not cut through the surface protective film strip B1. The third die-cutting also cuts a Y-direction dividing line M304 on the outer side of the Y-direction light-shielding Mylar film strip. This Y-direction dividing line M304 just cuts through the surface protective film strip B1. At the same time, the third die-cutting also forms a set of second positioning marking lines M305 corresponding to the first positioning marking line M203 on the edge of the surface protective film strip B1 and the first backing film strip T1. Then, the X-direction light-shielding Mylar film closed contour line M301 is removed. The X-direction light-blocking Mylar film material waste Z13 and the covered third transition release film material waste G1 are then removed through the third row of waste film P3. The waste inside the X-direction light-blocking Mylar film closed outline and the Y-direction light-blocking Mylar film strip waste inside and outside the Y-direction light-blocking Mylar film closed outline are removed, as well as the third transition release film waste G11. The material strips after waste removal are arranged from bottom to top as follows: the first bottom support film material strip T1, the surface protective film material strip B1, the X-direction light-blocking Mylar film and the Y-direction light-blocking Mylar film of the same layer. That is, the light-blocking Mylar film frame 22 is formed on the surface protective film material strip, and the surface protective film material strip B1 is formed with the detection positioning hole marking line M303 and the Y-direction dividing line M304. Step c: After the third die-cutting and waste removal, a window protective film strip C1 containing its own film is laminated onto the strip, with its own film facing upwards. The strip is then die-cut for the fourth time using the fourth circular die-cutting roller group M4 of the multi-station satellite rotary machine W1. This fourth die-cut only forms the third positioning mark line M401, corresponding to the second positioning mark line, on the film C11 of the window protective film strip. Simultaneously, the window protective film strip C1 and the surface protective film strip B1 are pressed together. Then, a process protective film strip G2 is laminated onto the film C11 of the window protective film strip. The process protective film strip G2 is divided into four strips, laminated at the edges and corners of the light-blocking Mylar film frame 22 to prevent the light-blocking Mylar film frame from shifting during subsequent die-cutting, ensuring accuracy. Finally, the strip is die-cut for the fifth time using the fifth circular die-cutting roller group M5 of the multi-station satellite rotary machine W1. This fifth die-cut forms the complete outline line M501 of the window protective film. In this embodiment, the main body, two side strips, and one bottom strip of the window protective film 21 are formed simultaneously. The outer edges of the two side strips and the bottom strip do not contact the inner edge of the Mylar mesh release film frame. The two side strips do not contact the main body and the bottom strip. At the same time, the fourth positioning mark line M502 corresponding to the second positioning mark line M305 is formed. Then, the waste material C12 of the window protective film strip and the waste material G21 of the process protective film strip are removed from the complete outline line M501 of the window protective film. Then, the waste material in the gap and the waste material G22 of the process protective film inside the frame are removed by the fourth row of waste tape. The main material strip after waste removal is as follows from bottom to top: the first bottom film strip T1, the surface protective film strip B1, the X-direction light-blocking Mylar film and the Y-direction light-blocking Mylar film of the same level, and the window protective film located inside the light-blocking Mylar film frame and composited with the surface protective film strip B1. The surface of the window protective film still retains its own film. Step d: In front of the main material belt after the fifth die-cutting waste removal in step c, in the opposite direction of the main material belt's operation, the Mylar mesh release film material belt L1 is laminated above the fourth bottom film material belt T4. Then, the sixth die-cutting is performed by the sixth circular die-cutting roller group M6, forming the inner frame outline M601 of the Mylar mesh release film frame and the fifth positioning mark line M602 corresponding to the second positioning mark line M305 on the Mylar mesh release film material belt L1. After being flipped by the second flipping roller F2, it is aligned and laminated with the main material belt, so that the inner frame outline M601 of the Mylar mesh release film frame is exactly located on the main material belt, where the complete outline M501 of the window protective film and the light-blocking Mylar mesh are aligned. In the gap between the inner edge contour lines of the membrane frame; then the fourth bottom film material strip T4 is removed from the top, and the Mylar mesh release film waste L11 within the inner frame contour line M601 of the Mylar mesh release film frame is removed through the fifth row of waste adhesive tape P5; after waste removal, the main material strips from bottom to top are: the first bottom film material strip T1, the surface protective film material strip B1, the X-direction light-blocking Mylar film and the Y-direction light-blocking Mylar film of the same level, and the window protective film 21 located inside the light-blocking Mylar film frame and combined with the surface protective film material strip, and the Mylar mesh release film material strip L1 with the inner frame contour line and combined with the surface of the light-blocking Mylar film frame; the surface of the window protective film 21 still retains its own film; Step e: After the sixth die-cutting, flipping, and waste removal in step d, the composite bottom protective film strip B2 on the main material strip is then die-cut for the seventh time by the seventh circular die-cutting roller group M7. This process cuts out the complete outline M701 of the bottom protective film, the Mylar mesh release film outline that overlaps with it, the surface protective film outline that partially overlaps with the complete outline M701 of the bottom protective film, and the sixth positioning mark M702 corresponding to the second positioning mark line M305. The die rollers of the seventh circular die-cutting roller group M7 are equipped with... The closed contour line blade R701 corresponding to the complete contour line of the protective film has a blade depth lower than other parts, and does not cut the protective film strip B1. The other parts of the closed contour line blade cut the protective film strip and connect with the Y-direction dividing line M304 formed in step b to form the complete contour line of the protective film. In this way, two handle parts can be formed on the bottom protective film and one handle part can be formed on the top protective film, which is convenient for the use of the component. After die-cutting, the waste material of the bottom protective film strip outside the complete outline of the bottom protective film M701 frame, the waste material of the Mylar mesh release film strip outside the outline of the Mylar mesh release film frame, and the waste material of the top protective film strip outside the outline of the top protective film frame, B12, are removed from the top. The first support film strip is peeled off from the bottom to obtain the finished components one by one. Each finished component, from bottom to top, consists of: top protective film, light-blocking Mylar film frame, window protective film and window protective film itself, Mylar mesh release film frame composite with light-blocking Mylar film frame, and bottom protective film.

[0011] In the above production process, the first circular die-cutting roller group M1 has several first slitting blades R101 arranged at intervals on the die roller, thereby slitting the Y-direction light-blocking Mylar film strip into Y-direction light-blocking Mylar film strips that are slightly wider than the width of the finished Y-direction light-blocking Mylar film, in preparation for the next step of asynchronous transfer. The Y-direction light-blocking Mylar film can save a lot of light-blocking Mylar film strip by using slitting and asynchronous transfer. The second circular die-cutting roller group M2 has three long edge line blades R201 formed on the die roller, which correspond to the two long edge lines M201 of the X-direction light-blocking Mylar film strip below the component and the inner long edge line M202 of the X-direction light-blocking Mylar film strip near the upper edge of the component. At the same time, it is provided with a first positioning mark line blade R202 corresponding to the first positioning mark line M203. The third circular die-cutting roller group M3, the fourth circular die-cutting roller group M4, and the fifth circular die-cutting roller group M5 are arranged sequentially at intervals along the rotation direction of the multi-station satellite rotary machine W1. The third circular die-cutting roller group M3 has four sets of light-shielding Mylar film closing contour line blades R301, corresponding to the X-direction light-shielding Mylar film closing contour line M301 and the Y-direction light-shielding Mylar film closing contour line M302, respectively. The four sets of light-shielding Mylar film closing contour line blades R301, when unfolded, form a rectangular arrangement. The die-cutting roller group M3 also has four detection positioning hole marking line blades R302 corresponding to the detection positioning hole marking line M303, a Y-direction dividing line blade R303 corresponding to the Y-direction dividing line M304, and a second positioning marking line blade R304 corresponding to the second positioning marking line M305. The second positioning marking line M305 formed by the second positioning marking line blades R304 consists of four marks: 1#, 2#, 3#, and 4#. Marking line 1# corresponds to the first positioning mark... The first three positioning mark lines correspond to the second positioning mark line M401, and the second positioning mark line M401 corresponds to the positioning mark line M401. The fourth circular die-cutting roller group M4 has a pressing convex surface M41 and a third positioning mark line pressing part M42 corresponding to the third positioning mark line M401. The position of the third positioning mark line pressing part M42 corresponds to the position of mark #4 in the second positioning mark line M305. The pressing convex surface M41 is located close to the inner side of the Y-direction light-blocking Mylar film position. The fifth circular die-cutting roller group M5 has a viewing window protection on its roller. The window protective film outline blade R501 corresponding to the complete outline line M501 and the fourth positioning mark blade R502 corresponding to the fourth positioning mark line M502 are also divided into four groups in this embodiment, including the two side thin strip window protective film outline blades, the bottom thin strip window protective film outline blades and the main window protective film outline blades. The fourth positioning mark line M502 corresponds to the position of the 2# mark line in the second positioning mark line M305. The sixth circular die-cutting roller group M6 has an inner frame contour line blade R601 corresponding to the inner frame contour line M601 of the Mylar mesh release film frame and a fifth positioning mark line blade R602 corresponding to the fifth positioning mark line M602; the fifth positioning mark line M602 corresponds to the position of the 3# mark line in the second positioning mark line M305; the seventh circular die-cutting roller group M7 has an outer frame closed contour line blade R701 corresponding to the complete contour line M701 of the bottom protective film and a sixth positioning mark line blade R702 corresponding to the sixth positioning mark line M702.

[0012] This utility model relates to a large-size window protection component. By adding four detection and positioning hole marking lines outside the main product outline within the component, the product outline shape is controlled and confirmed using diagonal dimensional differences without affecting the main product structure. This reduces product measurement time, improves production efficiency and yield, and ultimately lowers costs. Furthermore, the circular detection and positioning hole marking lines can also serve as a reference for positioning and assembly, enhancing the convenience and accuracy of assembly. This utility model's process achieves integrated product processing, significantly improving production efficiency and capacity, and increasing bonding efficiency. Precision dimensions are punched in a single pass, while other dimensions are punched in a nested manner, reducing assembly line risks. The use of a multi-station satellite rotary machine further reduces production line space and lowers costs.

[0013] The above embodiments are merely exemplary implementations used to illustrate the principles of this utility model; however, this utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A large-size window protection component, characterized in that: The protective component comprises, from top to bottom, a top protective film, a window protection and light-blocking composite layer, and a bottom protective film. The window protection and light-blocking composite layer includes a window protective film laminated to the lower surface of the top protective film and a light-blocking Mylar film frame. The lower surfaces of the window protective film and the light-blocking Mylar film frame are respectively laminated with a release liner for the window protective film and a Mylar mesh release liner frame. The light-blocking Mylar film frame is located around the window protective film, with a gap of 0.35mm to 0.50mm between them; and the thickness of the light-blocking Mylar film frame is greater than that of the window protective film. The thickness of the light-shielding Mylar film frame and the Mylar mesh release film frame is greater than the sum of the thickness of the window protective film and the release film of the window protective film itself; the inner edge of the Mylar mesh release film frame does not contact the outer edge of the window protective film, and the outer edge of the Mylar mesh release film frame is extended by 3.0±1.0mm relative to the outer edge of the light-shielding Mylar film frame; detection positioning hole marking lines are formed at the four corners of the surface protective film, and the difference in distance between the centers of the two sets of detection positioning hole marking lines distributed on the two diagonals is ≤0.2mm.

2. The large-size window protection component according to claim 1, characterized in that: The two wide sides of the window protective film are respectively provided with window protective side strips that are isolated from the two sides of the window protective film body. The bottom edge of the window protective film is provided with a window protective bottom strip that contacts the bottom of the window protective film body. The gap between the window protective side strip and the window protective film body is 0.5±0.1mm, and the gap between the bottom end of the window protective side strip and the window protective bottom strip is 0.5±0.1mm.

3. The large-size window protection component according to claim 1, characterized in that: The top protective film has a protruding first handle portion at one corner; the bottom protective film has protruding second handle portions at both corners, and one of the second handle portions coincides with the outline of the first handle portion.

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