Automatic reverse bending mechanism for paper roll

By combining the recurved rubber roller with the rigid recurved large and small shafts and adjusting the air pressure, the problem of low adjustment accuracy of existing recurved devices is solved, achieving uniform recurving and efficient flatness of paper, adapting to different paper specifications, and improving the adaptability and lifespan of the equipment.

CN224350065UActive Publication Date: 2026-06-12DONGGUAN CHASHAN DENUO PRECISION MASCH FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN CHASHAN DENUO PRECISION MASCH FACTORY
Filing Date
2025-08-21
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing recurving devices have complex structures and low adjustment precision, making it difficult to adapt to the needs of paper of different thicknesses or materials, resulting in unstable recurving effects and easy tearing or wrinkling of the paper.

⚗Method used

It adopts a combination structure of inverted rubber roller and rigid inverted large and small shafts, combined with an adjustable clamping cylinder, and through the overall lifting assembly and air pressure adjustment device, it precisely controls the elastic deformation of the inverted rubber roller, and synchronously adjusts the angle between the guide roller and the inverted assembly to form a multi-stage inverted effect.

🎯Benefits of technology

It achieves uniform concave deformation of paper, avoids local stress concentration, adapts to diverse paper requirements, improves paper flatness and equipment stability, and extends service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to an automatic anti-bending mechanism for paper rolls, belonging to the technical field of paper processing equipment. It includes: guide rollers A, B, and C arranged sequentially along the paper feeding direction; an anti-bending assembly disposed between guide rollers B and C, comprising: a fixedly installed anti-bending rubber roller; and a large anti-bending shaft and a small anti-bending shaft located above the rubber roller, arranged parallel to each other and rigidly connected by a square steel rod fixed to the small anti-bending shaft. This utility model, by setting up a combined structure of the anti-bending rubber roller and the rigid large and small anti-bending shafts, combined with an adjustable clamping cylinder, can precisely control the elastic deformation of the anti-bending rubber roller, causing the paper to form a uniform concave deformation in the anti-bending section, avoiding damage caused by localized stress concentration; the overall lifting assembly raises and lowers the slider via a chain drive, synchronously adjusting the angle between the guide rollers and the anti-bending assembly, ensuring that the paper is always in the optimal stress state during the anti-bending process, reducing offset or paper jam problems.
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