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Web Handling & Converting

Blogmaster: Dr. David Roisum

01
10th Anniversary of this Blog
Welcome Web Handlers!  I am very excited to author this blog dedicated to the must-know subjects of rollers, nips, tension control, wrinkling and much much more.  This is how it all began 10 years ago.  Since then, much water has ‘passed over the dam’ so to speak.  Po...

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30
You used punch cards for computer programming in school. You were the last generation of engineering students to use a slide rule (and the very first student in my college to use a scientific calculator; the Bowmar Brain). You were the very first to write a thesis at your university us...

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28
If there were a ‘poster child’ for reading caliper variations from winding defects it would be corrugations.  No further ‘measurements’ (scanner, lab, or better yet, roll hardness) are needed the profile must be high-low-medium across a width of 2-10 cm. Web201.35...

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23
We busted the seams at the Web Handling class in Charlotte so we will be adding one more for the year.  AIMCAL will be hosting two days of Web Handling, Converting and Winding Intro September 21-22 followed by the graduate class in Winding: Machines, Mechanics and Measurements on September 23-2...

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Posted in: Current Affairs
21
(Caliper/gage/thickness) profile is an essential word when troubleshooting many winding defects and most every case of baggy webs including the most common cause:  web thickness variation across the width; in short; thickness profile causing bagginess profile. Web201.35b Profile and Wind...

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16
I often ask and often teach that the very first thing to know about a waste or delay issue is its annual cost to your company.  Even so, I change my tune with regard to wrinkling because people get used to seeing lack of flatness as a norm.  To reset your eyes to be able to ‘see&rsqu...

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14
When used properly, I believe that one of the most useful words for problem solving in the web industries is ‘profile’. Web201.35a Profile and Winding Defects – Introduction https://www.youtube.com/watch?v=qmZzbawAQPQ ***201.35a – Profile - Introduction ...

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09
When a web hits a roller it must make a ‘choice’ with regard to flatness.  The options are either better or worse.  Of course, if you had taken my Web101 class you would already know that.  You would also know how to encourage the choice to be in your favor.  You stil...

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07
Wrinkling is the #1 cause of waste and delay in our web industries.  Not surprisingly, it is also the subject of many fallacies. Web201.34e – Mythbusting In Web Handling – Wrinkling Fallacies https://www.youtube.com/watch?v=cXkP-1IYBIc ***201.34e – Mythbustin...

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02
Cellphone Cameras
I own at least a dozen cameras ranging from pinhole to dslr to mirrorless to IR (shown here) to 3D and so on.  When I travel I will carry 4 cameras in my bags.  Yet, it is not permitted for me to use photographic skills in the plant for security reasons.  So, I will pass on my #1 phot...

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Posted in: Problem Solving

Blogmaster

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
Sep 21 - 22, 2015 - Chicago, IL
Web Handling and Converting
Sep 23 - 24, 2015 - Chicago, IL
Winding: Machines, Mechanics and Measurements

View the entire AIMCAL Converting School class schedule »
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