In the paper production, doctor (scraping) blades are placed in contact with press rolls during wet pressing so as to purge the surface of the rolls from processing water, contamination, and stickies. The contact is achieved by mounting the blade on a holder, which is tilted around a rotation axis until the blade tip contacts with the roll. The contact force is determined by the supply pressure...

Doctor blades are commonly used in paper machines in order to keep the surface of rollers clean. Due to higher demanding conditions, the requirements for doctor blades have steadily increased. The wear rates must remain low, while simultaneously their cleaning function has to be ensured. For this reason, the paper industry has developed a high degree of empirical knowledge concerning the cleani...

In the paper production, doctor (scraping) blades are placed in contact with press rolls during wet pressing so as to purge the surface of the rolls from processing water, contamination, and stickies. The contact is achieved by mounting the blade on a holder, which is tilted around a rotation axis until the blade tip contacts with the roll. The contact force is determined by the supply pressure...

8 Abstract Doctor blades are commonly used in paper 9 machines to keep the surface of rollers clean. Due to higher 10 demanding conditions, the requirements for doctor blades 11 have steadily increased. The wear rates must remain low, 12 while simultaneously their cleaning function has to be 13 ensured. For this reason, the paper industry has developed 14 a high degree of empirical knowledge co...

The dynamical behaviour of doctor blades used in paper industry for cleaning press-rolls is studied numerically and semi-analytically. A multiscale approach combining the dynamic effects of uni-directional roughness of the rolls on the lubrication/cleaning process of the blade is established and a parametric study regarding the geometrical and elastic properties of the blade carried out. The ul...

20 nm ZnO nanoparticles are used to fabricate the mesoporous photoanode of the CdS/CdSe quantum dot-sensitized solar cells by the simple doctor blade method. A maximum power conversion efficiency of 4.46% has been achieved, which indicated exciting prospects for ZnO nanoparticle based quantum dot-sensitized solar cells.

Proefschrift ingediend tot het behalen van de academische graad van Doctor in de Psychologische Wetenschappen 2005 " I've seen things you people wouldn't believe… " Roy Batty in Ridley Scott's Blade Runner Is word processing in reading serial or parallel? 21 Low-level oculomotor factors versus higher-level cognitive processes 22 How much information is extracted from the right of the fixation? 24