Folding or interfolding machine of sheets made of paper or similar material

The integration of force detection and AI-enhanced image acquisition in folding and interfolding machines addresses quality and productivity issues by ensuring precise stack formation and real-time adjustments, enhancing the production of high-quality folded or interfolded sheets.

US20260138845A1Pending Publication Date: 2026-05-21VALMET TISSUE CONVERTING SRL
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
VALMET TISSUE CONVERTING SRL
Filing Date
2023-10-20
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing folding and interfolding machines face challenges in maintaining high-quality production standards due to issues with folding roll adjustments, sheet stacking imperfections, and inaccurate weight measurement, leading to low productivity and potential machine stops.

Method used

Incorporation of detection devices in the separation and transfer groups to measure the force exerted by the forming stack, allowing for precise control of the folding and interfolding process, and the use of image acquisition for quality parameter definition through AI algorithms.

Benefits of technology

Enhances the quality and productivity of stack formation by ensuring correct folding and interfolding, preventing imperfections, and enabling real-time adjustments for optimal production conditions.

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Abstract

Folding or interfolding machine for forming stacks of a predetermined number of sheets comprising a first and a second folding or interfolding roll, arranged to rotate about respective rotation axes to fold or interfold the sheets according to a predetermined folding or interfolding configuration, obtaining a forming stack of folded or interfolded sheets which grows in height along a predetermined forming direction. A separation group is, furthermore, provided for separating a finished stack from a following forming stack of sheets. A transfer group is also provided for transferring the finished stack of folded or interfolded sheets towards a discharge zone. At least one between the separation group and the transfer group comprises at least a detection device for detecting the force exerted by the forming stack, or by the finished stack on the separation group, or on the transfer group.
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