Crêping doctor and method

The crepe scraper with a wear-resistant layer and differential surface roughness on the plateau and notches addresses wear issues, ensuring high bulk tissue production with maintained softness and extended service life.

WO2026109240A1PCT designated stage Publication Date: 2026-05-28VOITH PATENT GMBH
View PDF 6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
VOITH PATENT GMBH
Filing Date
2025-10-21
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing crepe scrapers experience significant wear on their working edges, leading to reduced service life and impaired product quality, particularly in the production of high bulk tissue products, while wear-resistant coatings alter the surface finish and compromise softness.

Method used

A crepe scraper with a metal blade featuring a wear-resistant layer on the impact surface, where the surface roughness of the plateau is lower than that of the notches, allowing for selective adjustment of surface topography to maintain product quality and extend service life.

Benefits of technology

The solution enhances the production of high bulk tissue products with maintained softness by selectively adjusting the surface roughness of the impact area, thereby reducing wear and extending the scraper's lifespan without compromising product quality.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure EP2025080275_28052026_PF_FP_ABST
    Figure EP2025080275_28052026_PF_FP_ABST
Patent Text Reader

Abstract

The invention relates to a crêping doctor and to a production method for a crêping doctor, which crêping doctor comprises a blade-shaped main body which is made of metal, in particular of steel or stainless steel, and which has a running surface that can be placed against the drying cylinder, and an end face which is at least partially covered with an anti-abrasion layer which provides the impact area for the fibrous web, the impact area having a plateau and a number of notches, characterized in that the surface roughness Ra1 of the plateau and the surface roughness Ra2 in the notches differ from one another.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Creping blade, creped paper and method of manufacturing paper

    EP1157818A1

  • Creping blade design

    EP4076931A1

  • Crepe scraper, method for manufacturing a crepe scraper and use of a crepe scraper

    DE102006001336A1

  • Crepe scraper for scraping paper web i.e. tissue web, from drying cylinder in tissue machine, has two ceramic layers arranged one above other at working edge and comprising wear-resistant, hard and less hard ceramic materials, respectively

    DE102011115813A1

  • Creping blade design

    EP4076931B1