Filling-in type plug cloth structure for manuscripts with uneven edges and sewing method of filling-in type plug cloth structure

Abstract

The invention discloses a filling-in plug cloth structure for manuscripts with uneven edges and a sewing method of the filling-in plug cloth structure, and relates to the technical field of Xinjiang classical literature repairing and binding. By customizing the leather filling-in gasket, the mixed sewing structure and the combination of the leather filling-in gasket and the mixed sewing structure and the Andussow style spine lining, the technical problem that a traditional Xinjiang classical literature plug cloth process is difficult to adapt to serious fluctuation of the edge of a book block is solved. According to the method, firstly, a special leather filling gasket is manufactured according to the actual contour of the edge of a manuscript book block, then a main plug cloth core is fixed by adopting a mixed sewing mode of combining a traditional circular seam and a P-type circular seam, and finally secondary plug cloth with herringbone patterns is sewn, so that the unification of structural stability and decorative aesthetics is realized. On the premise that original sewing holes of the manuscript are reserved and the historical structure is not damaged, free opening and closing of the book block are guaranteed, patterns of the plug cloth are accurate, and the method is suitable for protection and repair of manuscript documents with seriously uneven edges caused by factors such as dislocation of the historical sewing holes and composite leaf structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of Xinjiang classical literature repair and binding, in particular to a filling-in type endband cloth structure for manuscripts with uneven edges and a sewing method thereof. BACKGROUND

[0002] Endband is the core component of book binding, with the functions of structure reinforcement and decoration. In the traditional binding of Xinjiang classical literature, the endband adopts a composite structure of "primary sewing + secondary weaving", and realizes the unity of function and aesthetics through the double-stranded line process.

[0003] However, for manuscripts with historical damage, the traditional endband process may not be applicable due to the following problems: 1. Uneven edge problem: The book spine of some manuscripts is raised due to historical sewing hole misalignment and composite leaf splicing, resulting in a difference of 2-10mm in the edge of the book block. The traditional flat sewing process cannot form a continuous and flat endband surface; 2. Structural and aesthetic contradiction: Traditional endband sewing relies on uniform book block edges. If forced to use, it may limit the opening and closing of the book block, or damage the precision of the geometric pattern, violating the core principle of "structure is aesthetics" in traditional binding; 3. Too strong intervention: Existing solutions such as "trimming the edges of the book block" and "adding rigid support" will damage the original structure of the manuscript, which is not in line with the principles of "minimum intervention" and "recognizability" for the protection of ancient books; 4. Insufficient material compatibility: Some repair solutions use modern synthetic materials, which are not compatible with the physical properties (such as stretchability and air permeability) of the original leather and paper of the manuscript, and may cause secondary damage over time.

[0004] Currently, there is a gap in the repair technology of endband for manuscripts with uneven edges, and there is an urgent need for a sewing method that can adapt to historical damage patterns while preserving the original structure and decorative features to meet the needs of precious ancient book protection. SUMMARY

[0005] The purpose of the present application is to provide a filling-in type endband cloth structure for manuscripts with uneven edges and a sewing method thereof, to solve the triple contradiction of "structural stability-aesthetic integrity-originality preservation" in the repair of endband for manuscripts with uneven edges (especially Xinjiang classical literature), to provide a reversible, low-intervention, and highly adaptable filling-in endband structure sewing method, and to ensure that the manuscript can be fully opened and closed after repair, while maintaining the geometric precision and historical features of the endband.

[0006] Based on the above purpose, the present application realizes the patching and sewing of the patch cloth through the technical path of "matching the uneven edge of the patching pad + reinforcing structure of the mixed seam method + reversible connection without glue to retain the originality".

[0007] The present application provides a patching type patch cloth structure for uneven manuscript edges, comprising the following components: A patching pad, which is in contact with the original irregular edge of the manuscript to be repaired, serves as a basic patching layer; A spine lining, which is used to wrap the patching pad to the inside, serves as a structural reinforcement layer; A patch cloth core, which is fixed on the spine lining, serves as a reference layer for the secondary patch cloth; A secondary patch cloth, which is woven on the patch cloth core, is used for decoration and flexible protection of the manuscript edge; The patching pad, the spine lining, the patch cloth core, and the secondary patch cloth are sequentially combined to form an integrated self-adaptive reinforced patching type patch cloth structure.

[0008] Preferably, the patching pad is a solid-state pad with a three-dimensional profile, and the profile of the solid-state pad matches the unevenness of the original irregular edge of the manuscript to be repaired; The patching pad is a multi-layer composite structure composed of at least five layers of leather material with a thickness of 1.2-1.3mm.

[0009] Preferably, the multi-layer composite structure includes leather material, interlayer adhesive, and a bark paper sealing layer covering the outer surface of the patching pad; The interlayer adhesive is polyvinyl acetate (PVAc) or ethylene-vinyl acetate copolymer (EVA); The leather material is any water-absorbing and easy-to-plastic material such as thick vegetable tanned calf nubuck leather, alum tanned leather, or nubuck goat skin, which meets the archival level protection standard, has a pH value of 7.0-8.5, and has no sulfur residue.

[0010] Preferably, the book lining is an Andalusian type book lining reversibly connected with the book core without glue, including a flexible layer composed of paper and fabric laminated by adhesive, and a card strip pasted on the inner surface of the flexible layer, which is arranged longitudinally along the book lining.

[0011] Preferably, the material of the patch cloth core is leather matching the cover material of the manuscript to be repaired; The patch cloth core is a strip composed of a leather surface layer and alkali-reserved kraft paper adhered to the inside of the leather surface layer, with a width of 5-7mm, a total thickness of 1-1.2mm, and a pH value of the alkali-reserved kraft paper of 8.0; The color of the woven thread of the secondary endpaper matches the original endpaper color of the manuscript.

[0012] The application also provides a sewing method for the patching endpaper structure of the uneven edge manuscript, comprising the following steps: S1, production and integration of the patching gasket and the spine lining: respectively customize the patching gasket and the book lining, bond and fix the produced patching gasket to the inner side of the spine lining, and fold the extended parts of the head and tail of the spine lining to form a platform for carrying the endpaper core; S2, construction of the mixed sewing structure: S2-1, preparation of the endpaper core: dry the leather strip and alkali stock kraft paper after bonding with PVAc or EVA, enhance the stiffness and acid buffering capacity of the endpaper core, form a composite strip of predetermined width and thickness as the endpaper core; S2-2, pre-punching positioning: pre-punch the endpaper sewing holes along the original sewing holes of the book core, the hole spacing is consistent with the folio spacing, and at the same time, one additional sewing hole is added between every two original holes at the edge of the patching gasket, realizing the double fixation of the patching gasket and the book core; S2-3, mixed sewing method: using wax-free linen thread, in the mode of alternating traditional loop sewing and P-type loop sewing, the book core folio, customized patching gasket, spine lining and endpaper core are sewn and fixed, and anti-skid incisions are cut at the curved surface of the patching gasket to anchor the sewing, during the sewing process, the book core is placed horizontally to avoid uneven sewing tension caused by traditional vertical sewing; at the curved surface of the patching gasket (the fluctuation difference is ≥3mm), a small incision of 0.5mm deep is cut with a scalpel, the sewing is embedded and anchored in the incision to prevent the sewing from slipping along the gasket curve when the manuscript is opened and closed; S3, sewing of the secondary endpaper: using colored silk thread, the secondary endpaper is sewn on the endpaper core in a herringbone pattern, the weaving density is controlled to avoid excessive weaving causing the endpaper to be stiff, ensuring that the manuscript can be completely unfolded (opening angle ≥180°) and the endpaper has no wrinkles; S4, reversible connection of the book core and the spine lining: through the long-legged needle sewing method, the book core and the spine lining which have completed the above steps are connected only at the folio at the head and tail ends.

[0013] Preferably, the production of the patching gasket and the spine lining in step S1 comprises the following steps: S1-1, obtain a template by transferring the edge profile of the manuscript book core through a transparent film, cut multiple layers of leather according to the template, use PVAc or EVA as the interlayer adhesive to bond them, after shaping by a flattening machine, trim the edge of the gasket with a scalpel to completely match the profile of the book core, polish the edge with a Teflon folding knife until it is smooth, and seal the surface with mulberry paper to prevent leather fibers from falling off and contaminating the book core, forming a customized patching gasket that matches the fluctuations of the edge of the book core; S1-2, Preparation of the Andalusian spine lining: Paper with similar fiber characteristics to the manuscript's mulberry paper and linen are laminated with a wheat starch paste to form a flexible base layer, ensuring firm adhesion between layers and no warping, and archival-grade paperboard strips are pasted on the inner side in the longitudinal direction as a reinforcing layer, the edges of the paperboard strips are rounded to avoid scratching the book block paper, forming the spine lining; In S1-1, the pressing conditions of the flattening machine are: pressure 0.3 MPa, time 30 seconds; the leather is 1.2-1.3 mm thick; In S1-2, the paper is mulberry paper; the wheat starch paste is cooked with pure water, the concentration is 1:8 W / V, and the width of the paperboard strip is consistent with the book.

[0014] Preferably, in step S2-3, the traditional loop stitch and the P-type loop stitch are alternately performed at every 1-2 book block signatures; the stitches formed by the traditional loop stitch pass through the center of the book block signature after winding around the plug cloth core for one turn; the stitches formed by the P-type loop stitch are sewn on the spine side, forming a B-shaped structure, and the sewing on the spine side prevents the plug cloth core from falling off; Both the traditional loop stitch and the P-type loop stitch are knotted at the center fold of each book block signature, and the knots are hidden inside the book block.

[0015] Preferably, in step S3, the geometric precision error of the herringbone pattern is not more than 0.5 mm, and a 0.2 mm sewing allowance is reserved.

[0016] Preferably, in step S4, only 1-2 book block signatures at the beginning and end of the book block are fixed by sewing, and the reversible separation of the book block and the lining is achieved by cutting the sewing, which conforms to the "minimum intervention principle" and "reversibility principle" of ancient book protection.

[0017] Therefore, the present application adopts the above-mentioned plug cloth structure for uneven manuscript edges and its sewing method, which has the following advantages: 1. Improved structural stability: The combination of leather patch and mixed sewing structure completely adapts the plug cloth to the uneven edge of the book block, solving the problem of plug cloth breakage and limited opening and closing of the book block caused by uneven edges in traditional processes. Tests show that the repaired manuscript plug cloth sewing is not loose, and the book block edge is not worn.

[0018] 2. Retained aesthetic integrity: The geometric precision error of the secondary plug cloth herringbone pattern is ≤0.5 mm, consistent with the original plug cloth style, and part of the patch sewing line is visible, conforming to the "recognizability principle" of protection, and avoiding the loss of historical information caused by excessive repair.

[0019] 3. Balance of originality and reversibility: The original sewing holes of the manuscript are preserved throughout the process, the book block and the spine lining are reversibly connected without glue, and all repair steps and materials are reversible, conforming to the core principles of ancient book protection in the Venice Charter.

[0020] 4. Strong material and process compatibility: The repair materials are all special for archival protection (pH value 7.0-8.5, no acid and no sulfur), which are compatible with the leather and paper materials of the manuscripts of the classical literature of Xinjiang in the 15th-17th century, and there is no secondary corrosion risk in long-term use.

[0021] 5. Wide application scenarios: It is not only suitable for the manuscripts of the classical literature of Xinjiang with serious edge fluctuations, but also can be popularized to Islamic binding, Eastern Mediterranean binding, and medieval European binding, and other ancient books with similar composite endpaper cloth structure, thereby providing a standardized solution for similar protection problems.

[0022] The technical solutions of the present application will be further described in detail below by means of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The manufacturing process of the patch is shown in the figure, wherein (a) is the template mapping process; (b) is the leather cutting process; (c) is the adhesive flattening process; and (d) is a schematic diagram of the finished patch; Figure 2 The connection of the patch and the book lining on the outside of the book is shown in the figure; Figure 3 The schematic diagram of the loop seam method in the mixed sewing method is shown in the figure, wherein (a) is the traditional loop seam method; and (b) is the P-type loop seam; Figure 4 The B-shaped structure formed by the P-type loop seam is shown in the figure, wherein 1 is the endpaper cloth core; 2 is the patch; and 3 is the spine lining; Figure 5 The weaving effect of the secondary endpaper cloth herringbone pattern is shown in the figure; Figure 6 The stacking order of the components is shown in the figure, wherein a is the patch; b is the adhesive; c is the Andalusian spine lining; and d is the endpaper cloth core; Figure 7 The effect comparison before and after repair is shown in the figure, wherein (a) is a photo of the book before repair; (b) is a photo of the book after repair; and (c) is a photo of the book after repair; Figure 8 The flat display intention of the repaired book is shown in the figure. DETAILED DESCRIPTION

[0024] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the usual meanings understood by those skilled in the art to which the present application belongs.

[0025] The technical solutions of the present application will be further described in detail below by means of the accompanying drawings and examples.

[0026] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand. These other embodiments are also covered within the scope of protection of the present application.

[0027] This embodiment takes the 17th century Uighur medical manuscript UTK-0001 (size 320x220x53-80mm, book block composed of 30 booklets, composite leaf structure, maximum edge fluctuation 8mm) as an example to illustrate the implementation process of the present application in detail: 1. Preliminary preparation: Book block mapping: use transparent polyester film to transfer the outline of the head and tail edges of the UTK-0001 book block, and cut out a template according to the outline; this step is shown in Figure 1 (a).

[0028] Material selection: leather selected plant tanning calf nubuck leather, thickness 1.2mm; paper mulberry paper 20g / m 2 Handmade paper mulberry paper; British imported wax-free flax thread, diameter 0.5mm; wheat starch paste prepared with pure water; aviation linen; 300g archival grade cardstock; PVAc; goat skin, thickness 1.2mm; colored silk thread, diameter 0.4mm.

[0029] All materials meet the ISO16245 archival grade protection standard, avoiding chemical corrosion or physical stress mismatch.

[0030] 2. Leather patch preparation: Cutting: as shown in Figure 1 (b), cut 6 layers of calf nubuck leather according to the transparent polyester film template, each layer size 320mm (length) x 6mm (width), with 1mm excess reserved for the edge.

[0031] Bonding and flattening: evenly apply PVAc between the layers, place in a flattening machine, and press at a pressure of 0.3MPa for 30 seconds to flatten the bonded patch to a total thickness of 6mm, as shown in Figure 1 (c).

[0032] Trimming and sealing: trim with a scalpel to match the book block profile completely, polish the edges with a Teflon scraper, and seal the surface with paper mulberry paper, dry and ready for use, as shown in Figure 1 (d).

[0033] 3. Preparation and integration of Andalusian spine lining: Laminating: 20g / m 2The mulberry paper is laminated with thick wheat starch paste and dried under flat weight for 24 hours.

[0034] Reinforcement: 300g archival cardstock strips of 320mm x 75mm are adhered to the inside, with rounded edges.

[0035] Reserve: 10mm extensions at the head and tail for subsequent sewing.

[0036] Connection: The prepared patch is adhered to the inside of the spine lining, and the extensions at the head and tail of the spine lining are folded to form a platform for the plug cloth core, as shown in Figure 2 .

[0037] 4. Hybrid sewing structure sewing: Plug cloth core preparation: 1.2mm thick goat leather is cut into 6.5mm x 10mm long strips, and the flesh side is adhered to alkaline stock cowhide paper with a pH of 8.0, with a total thickness of 1.5mm after adhesion.

[0038] Pre-punching: punch holes at the staggered positions of the original sewing holes, with a hole spacing equal to the thickness of the signatures, and 6 additional holes are added at the edges of the patch.

[0039] Hybrid sewing method: use wax-free linen thread, flat sewing, odd-numbered signatures traditional loop sewing, even-numbered signatures P-type loop sewing, cut 0.5mm anti-slip notches at curved surfaces, sewing embedded anchoring, traditional loop sewing method as shown in Figure 3 (a), P-type loop sewing method as shown in Figure 3 (b), P-type sewing forms a B-shaped structure, and the wrapping around the spine side sewing prevents the plug cloth core from falling off, as shown in Figure 4 .

[0040] 5. Secondary plug cloth and overall adaptation: Silk thread: double-stranded silk thread (diameter 0.4mm).

[0041] Weaving: weave the secondary plug cloth on the plug cloth core in a herringbone pattern, with 1 unit every 3-5mm, with a precision error of 0.5mm, and the weaving effect is shown in Figure 5 .

[0042] Connection: long needle sewing method to fix the book block and the lining, only at the head and tail signatures.

[0043] The stacking order of the above components after completion is as follows Figure 6As shown, the key structures are presented from bottom to top (or from inside to outside) in the figure: Compensation Spacer: Compensation spacers are placed on the book block and tightly bonded to the inner side of the spine lining with adhesive b (Adhesive, PVAc or EVA), the spacer profile fully adapts to the irregular edges of the manuscript book block, the surface covers the mulberry paper sealing layer, and the precise compensation of the book block edges is achieved; Andalusi-Style Spine Lining: As the basic structural layer, the inner side is longitudinally pasted with archival-grade cardboard strips for reinforcement support, and the extended parts at the ends are folded to form a loading platform, providing a stable installation foundation for subsequent components; Leather Strip: Fixed on the platform formed by the folding of the spine lining, it is a strip composed of leather and alkali-reserved kraft paper, with stiffness and acid buffering capacity, serving as the woven reference for secondary leather.

[0044] Comparison of effects before and after repair Figure 7 As shown, the book is repaired from uneven edges to neat edges, and the compensation effect is obvious.

[0045] Boxing: Put into an archival-grade acid-free cloth clamshell book box, with a 3mm acid-free foam display reading book support wrapped in cloth inside, complete the repair.

[0046] Implementation effect UTK-0001 can be completely unfolded (opening angle 180°) after repair, as shown in Figure 8 The herringbone pattern of the leather strip is neat, and the edges are wrinkle-free; after testing, the sewing is tight, and the compensation spacer does not fall off; the book block and the lining can be reversibly separated, the original structure is completely preserved, and the subsequent academic research and display requirements are met.

[0047] Therefore, the present application provides a compensation type leather structure for uneven edge manuscripts and its sewing method, which realizes the compensation sewing of leather by the technical path of "compensation spacer adapting to edge fluctuations + mixed sewing method strengthening structure + reversible connection preserving originality without glue". It solves the threefold contradiction of "structural stability-aesthetics integrity-originality preservation" in the repair of uneven edge manuscript literature, especially the binding system of ancient books in Xinjiang classical literature, provides a reversible, low-intervention, and highly adaptive compensation leather structure sewing method, and ensures that the manuscript literature can be completely opened after repair, and the geometric precision and historical features of the leather are maintained.

[0048] The above specific embodiments further explain the purposes, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and does not limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A patching end-sealing fabric structure for manuscripts with uneven edges, characterized in that, Includes the following components: A leveling pad is placed against the original irregular edges of the manuscript to be restored, serving as a base leveling layer. Spine lining, used to wrap the padding pad inside as a structural reinforcement layer; The endpaper core is fixed to the spine lining and serves as the base layer for the secondary endpaper. Secondary end-cap fabric, woven into the end-cap fabric core, is used for decoration and provides flexible protection for the edges of the manuscript; The leveling pad, spine lining, end cap core, and secondary end cap are combined in sequence to form an integrated self-adaptive reinforced leveling end cap structure.

2. The edge-filling end-stopping fabric structure for manuscripts with uneven edges according to claim 1, characterized in that, The leveling pad is a solid pad with a three-dimensional contour, and the contour of the solid pad matches the undulation of the original irregular edge of the manuscript to be restored. The leveling pad has a multi-layer composite structure, consisting of at least five layers of leather material with a thickness of 1.2-1.3mm.

3. A leveling end-stop fabric structure for manuscripts with uneven edges according to claim 2, characterized in that, The multi-layer composite structure includes leather material, interlayer adhesive, and a paper sealing layer of mulberry bark covering the outer surface of the leveling pad; The interlayer adhesive is polyvinyl acetate or ethylene-vinyl acetate copolymer; The leather material is any one of thick vegetable-tanned calfskin suede, alum-tanned leather, or suede goatskin, archive grade, with no sulfur residue.

4. A leveling end-stop fabric structure for manuscripts with uneven edges according to claim 1, characterized in that, The book liner is an Andalusian-style book liner, which is reversibly connected to the book block without glue. It includes a flexible layer made of paper and fabric laminated together with adhesive, and cardboard strips pasted on the inner surface of the flexible layer. The cardboard strips are arranged longitudinally along the book liner.

5. A leveling end-stop fabric structure for manuscripts with uneven edges according to claim 1, characterized in that, The material of the end cap is leather that matches the cover material of the manuscript to be restored; The end cap core is a strip made of leather surface layer and alkali reserve kraft paper bonded to the inside of leather surface layer. The strip width is 5-7mm and the total thickness is 1-1.2mm. The pH value of the alkali reserve kraft paper is 8.

0. The color of the weaving thread in the secondary endpaper matches the color of the original endpaper in the manuscript.

6. A method for sewing a patching endpaper structure for manuscripts with uneven edges as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Fabrication and integration of leveling pads and spine lining: Customize leveling pads and book linings separately, glue and fix the prepared leveling pads to the inside of the spine lining, and fold the extended parts at the beginning and end of the spine lining to form a platform for supporting the end cap core. S2. Construction of a hybrid stitching structure: S2-1. Preparation of end cap core: Leather strips are combined with alkali storage kraft paper to form a composite strip of predetermined width and thickness as the end cap core; S2-2, Pre-drilling and positioning: Pre-drill holes along the original stitching holes of the book block and at the additional positions added on the edge of the leveling pad. The hole spacing is consistent with the book block spacing. S2-3, Mixed stitching method: Using unwaxed linen thread, the book block, custom patch pad, spine lining and end cap fabric core are sewn together and fixed in an alternating pattern of traditional loop stitch and P-type loop stitch. Anti-slip cuts are made on the curved surface of the patch pad to reinforce the stitching. S3. Sewing of secondary end-cap fabric: Use colored silk thread to sew secondary end-cap fabric onto the end-cap fabric core in a herringbone pattern. Control the weaving density to retain some of the lower layer sewing visible and ensure flexibility. S4. Reversible connection between the book block and the spine lining: The book block and the spine lining, which have completed the above steps, are sewn together only at the beginning and end of the book section using long stitch stitching.

7. A sewing method for a patching end-cover fabric structure for manuscripts with uneven edges, as described in claim 6, characterized in that, The fabrication of the leveling pad and spine lining in step S1 includes the following steps: S1-1. Obtain a template by tracing the outline of the manuscript block edge through a transparent film. Cut multiple layers of leather according to the template, and use interlayer adhesive to stack and bond them together. After pressing and shaping with a flattening machine, trim the edges and seal the surface with paper mulberry bark to form a customized leveling pad that matches the undulations of the manuscript block edge. S1-2, Preparation of Andalusian-style spine lining: Paper and linen are laminated with wheat starch paste to form a flexible base layer, and archival-grade cardboard strips are pasted longitudinally on the inside as a reinforcing layer to form the spine lining; In S1-1, the pressing conditions of the flattening machine are: pressure 0.3MPa, time 30 seconds; leather thickness 1.2-1.3mm; In S1-2, the paper is mulberry bark paper; the wheat starch paste is boiled with pure water to a concentration of 1:8 W / V, and the width of the cardboard strips is the same as that of the book.

8. A sewing method for a patching end-cover fabric structure for manuscripts with uneven edges, as described in claim 6, characterized in that, In steps S2-3, traditional circular stitching and P-type circular stitching are alternated every 1-2 book sections; the stitches formed by traditional circular stitching wrap around the end cap fabric core and then pass through the center of the book section; the stitches formed by P-type circular stitching wrap around the spine side of the book, forming a B-shaped structure. Both traditional circular stitching and P-type circular stitching are secured by knotting at the center fold of each book block, with the knot hidden inside the center of the book block; At the curved surface of the patch, a tiny incision of 0.5 mm depth is made with a scalpel, and the suture is embedded and anchored into the incision.

9. A sewing method for a patching end-cover fabric structure for manuscripts with uneven edges, as described in claim 6, characterized in that, In step S3, the geometric accuracy error of the herringbone pattern shall not exceed 0.5mm, and a sewing allowance of 0.2mm shall be reserved.

10. A sewing method for a patching end-cover fabric structure for manuscripts with uneven edges, as described in claim 6, characterized in that, In step S4, the stitching connection only fixes 1-2 book blocks at the beginning and end of the book block, and the reversible separation of the book block and the lining is achieved by cutting and sewing.

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