http://printwiki.org/BeaterRecent Changes of the page "Beater" on PrintWiki.en-us http://printwiki.org/Beater2007-09-06 12:00:00Encyclopedia of Graphic Communications Import <div id="content" class="wikipage content"> Differences for Beater<p><strong></strong></p><table> <tr> <td> <span> Deletions are marked with - . </span> </td> <td> <span> Additions are marked with +. </span> </td> </tr> <tr> <td> Line 1: </td> <td> Line 1: </td> </tr> <tr> <td> </td> <td> <span>+ Also called a refiner, a beater is an older, mechanical refining device for paper ["pulp"]. It is an oval-shaped tank containing metal bars mounted on a rotating beater roll in the center of the tank and stationary metal bars mounted on a bedplate attached to the wall of the tank. The fibers, suspended in a water ["slurry"], are circulated through the tank and drawn between the two sets of bars, the resulting abrasion alters the fibrous structure in such a way as to make them suitable for forming into a paper ["web"]. This process, known as ["beating"] or ["refining"], is the most crucial stage of the papermaking process. Various ["fillers"], ["coatings"], or ["sizing"] can also be added to the pulp fibers at this point, as can dyes used to color the paper. (Paper which has had its sizing added during refining is known as ["beater-sized"], while paper that has had its colorant added during refining is known as ["beater dyed"].) The fibers are pumped from the beater to a ["conical refiner"]—also called a ["jordan"]—for further beating.<br> + <br> + Newer pulp refining methods employ continuous ["disk refiners"] which take the place of the beater system. (See ["Refining"] and ["Paper and Papermaking: Papermaking"].)</span> </td> </tr> </table> </div>