pocket book

The notebook employs a thread-stitched design with a spine reinforcement of styrene-based thermoplastic elastomer adhesive and a bottom reinforcement of polyvinyl acetate adhesive to address uneven rigidity and creasing issues, enhancing opening flexibility and structural integrity.

JP7856974B2Active Publication Date: 2026-05-12TAKAHASHI SHOTEN +1
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Patent Information

Application Number
JP2022120417
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-07-28
Publication Date
2026-05-12
Estimated Expiration
2042-07-28

AI Technical Summary

Technical Problem

Conventional bookbinding methods, such as thread-stitched and perfect binding, suffer from issues like uneven bending rigidity, creases, and poor book-opening properties due to the use of materials like washi paper and gauze, or the limitations of PUR/EVA-based hot-melt adhesives.

Method used

A notebook design using thread stitching with a spine reinforcement made of a cured synthetic rubber-based hot-melt adhesive containing styrene-based thermoplastic elastomer, combined with a bottom reinforcement of a cured aqueous emulsion adhesive, allowing for flexible and self-adhesive properties to enhance opening ability.

Benefits of technology

The notebook achieves improved flexibility and smooth opening, preventing creases and maintaining structural integrity without the need for additional reinforcing materials, surpassing the opening ability of conventional methods.

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Abstract

To provide a technology capable of improving a spread property of a pocket book more than a conventional article.SOLUTION: A pocket book has a body part, a lower hardening part, a back hardening part and a cover part. The body part is formed as a structure of binding a plurality of unit structures by a yarn sewer by laminating the plurality of unit structures with a sheet or a sheet folding-back body constituted by folding back the sheet as a unit structure. The lower hardening part is constituted by a hardened object of an aqueous emulsion adhesive of including polyvinyl acetate as a main component, and is coated on a place bound by the yarn sewer in the body part, and hardens the lower part of the body part. The back hardening part is constituted by a hardened object of a synthetic rubber type hot melt adhesive of including a styrene type thermoplastic elastomer as a main component, and is coated on a lower hardened place, and hardens the back of the body part.SELECTED DRAWING: Figure 2
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