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Blogmaster: Dr. David Roisum

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Roll Hardness - Rhometer

Posted by David Roisum on November 3, 2011
But let's not forget the venerable Rhometer invented by David Pfeiffer of Beloit Corporation in the mid 1960's because it soon became the number one hardness instrument in paper and number two in film.  Incredibly, you can still obtain the original as well as parts and service.  However, two digital versions made data handling easier though the resolution was slightly degraded (fans, going digital does not mean getting better) and the scales are slightly different.  The first, the Bel RhoHammer, was my invention and my only patent.  The second incarnation, the Bel-200 GenII, is what is currently marketed along with the original.

Since Beloit Corporation (one of the largest machine builders) went out of business in 1999, this product has been picked up by MillAssist Services (Otsego MI, 1 (269) 692-3211).  Those interested in the history of how the oldest, largest and most innovative web machine builder in the world could go out of business due to, you guessed it, corporate greed, will definitely want to read Lou Bagnato's Sacrificial Lamb.
Posted in: Measurement, Winding
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Comments

#313 Reginaldo Bachiega
Friday, January 20, 2012 3:42 PM
Hi Dr. Roisum, may you tell me what is the number one hardness instrument in film (esp OPP)?

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Dr. David Roisum

Dr. Roisum is a well-known authority in the area of web handling and converting. He has authored seven books, including Winding, Rollers and Web-Handling and has coauthored or edited several others. He was a technical editor for Converting Magazine with a monthly column entitled "Web Works." An accomplished professional speaker and instructor, Roisum has been praised for his skill at translating highly technical information into a common sense practical reference. Dave has been honored by TAPPI with their Finishing & Converting Division Award, Thomas W. Busch Prize and Finest Faculty awards and is a TAPPI Fellow. Dave received his Ph.D. from the Web Handling Research Center where he later became an Industrial Advisory Board member.

Dave has worked for the Beloit Corporation as a designer of winding machinery and later as a manager of research, and for Kimberly-Clark as a converting expert serving all business units. He is now a principal of Finishing Technologies Inc., providing consulting services to more than 300 clients who convert or manufacture: paper, film, foil, nonwovens, textiles and many other materials. He has accumulated much practical experience working in nearly 1,000 plants over the course of more than three decades.