OFFICINE AIRAGHI S.R.L. Patent applications |
Patent application number | Title | Published |
20120032010 | SPARE PART FOR DISC REFINERS FOR THE PRODUCTION OF PAPER - A spare part for disc refiners, in particular a stator and/or rotor used in a disc refiner for the preparation of paper pulp, where the stator and/or rotor each comprise a disc-shaped metallic element with a refining blade surface having alternating blades and grooves, where the rotor is designed to be driven and rotated around its own axis of rotation which passes through the centre of the disc-shaped element so that the rotor blades perform a rotary movement in front of the stator blades with a suitable air gap in between. The spare part is characterised in that the blade surfaces have a pre-set angle greater than | 02-09-2012 |
20090134258 | PROCESS FOR MAKING CONICAL SPARE PARTS FOR REFINERS FOR THE PRODUCTION OF PAPER - A process for making spare parts for refiners used for producing paper, in particular for making refiners for preparing paper pulps, where the pulp enters at one end and exits on the other side, passing through a rotary body or rotor or male component equipped with bars (or grooves) and a casing or stator or female component bearing fixed counter-bars. This process includes mechanical machining of unmachined sectors; routing or mechanical machining of the machined sectors to obtain a set of bars or grooves or holes; putting together the cone (rotor or stator by joining all of the sectors to the supporting flanges; mechanical machining (turning and grinding) to finish the cone; and balancing of the rotor or stator. | 05-28-2009 |