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The Official
Technical Magazine
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Web Handling & Converting

Blogmaster: Dr. David Roisum

Many of you know of TAPPI as one of the oldest and largest trade organizations in all of the web industries.  Though its roots are in paper, it has had divisions for polymers, coatings, laminations, nonwovens, tissue and other non-paper materials for decades.  More of you should know of TA...

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Our third in series of fluid control clips discusses design guidelines for mid-stroke and end-of-stroke positioning using pneumatic and hydraulic cylinders. Web201.32c Fluid Control – Cylinder Positioning ***201.32c – Fluid ...

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What does it mean when a defect favors some portion of the radius range of the wound roll, such as near the core or near the OD? We learned at the end of your two day winding class section of Web101 that radius dependencies always mean that the winder is involved in some way. What is t...

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IWEB June 8-10
The 13th IWEB  is just 8 weeks away.  Don’t miss this biennial trip to the Web Handling Research Center that is the ‘Mecca’ for the subjects we all hold so near and dear.  Papers will be presented in the following areas: Longitudinal Mechanics and Tension Control; La...

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Our second in series of fluid control clips discusses how to control cylinder stroke speed and related piping issues. Web201.32b Fluid Control – Ins & Outs of Cylinders\ ***201.32b – Fluid Control – Ins & Outs ...

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Why do splices break more often than non-splice areas of the web? Duh, because splices are weaker. Why are splices weaker? Because they are imperfectly made, whether made by man or machine. Granted, but could a splice be weaker even if it were perfect? Yes, I seem ...

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My 10th Book
No, this is not a misprint or an April Fool’s joke.  Yes, I have10 published books (but who is counting?).  My latest, Photo Art of Dr Roisum, is self-published through Shutterfly.  You can order the book directly from the print-on-demand company or just browse through it if you...

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Fluid Control - Pressure
We begin a series of fluid control clips by starting at the beginning; how to size or resize a pneumatic (or hydraulic) cylinder.  We also talk about the even greater challenges on a pneumatic unwind brake and solutions for them. Web201.32a Fluid Control – Pressure https://www....

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It is next to impossible to know, before hand, whether saleable product can be made during acceleration/deceleration.  Some processes, such as coating and drying, are speed dependent and can not be readily modulated during the speed change cycle.  Sometimes it is less than perfect drive co...

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Nuts and Bolts - Shear Ledges
Shear ledges are not for everybody.  However, they do handily solve several problems related to alignment and maintenance.  Find out what these are and whether shear ledges are for you. Web201.31c Nuts and Bolts – Shear Ledges ...

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David Roisum photo

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.

Converting School

Dr. David Roisum's
Upcoming Classes
May 11 - 12, 2015 - Charlotte, NC
CONNECT USA - Web Handling and Converting
May 14 - 15, 2015 - Charlotte, NC
CONNECT USA - Winding: Machines, Mechanics and Measurements

View the entire AIMCAL Converting School class schedule »

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