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Web Handling & Converting

Blogmaster: Dr. David Roisum

I used to be a web machine designer in a previous life for what was the largest and oldest of the web machine companies.  This background inevitably shows up in writings and teaching.  I would in fact love to make a special version of Web101 for machine builders, but they so seldom show up...

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Meter on Metal
I have run into yet a second machine this year that drives the rubber roll of a rubber metal nip.  The problem, as my Web101 students will know, is that the effective diameter of the rubber is indeterminate.  It depends on physical diameter, cover chemistry and thickness, temperature and n...

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How to Not make Bagginess Worse than it Already Is
The badness of baggy goes beyond mere waste, delay and customer complaint troubles and well into the troubles of troubleshooting one of the most difficult problems in our web industries.  My first piece of advice if your boss is looking for someone to be on the bagginess team is:  don&rsqu...

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Furlongs to Fathoms
I hate sounding pedantic or preachy, really, but there are many things that are not accessible without knowing what force, energy, work, stress and so on are.  The access that may be denied is a gut understanding of machines.  Similarly, one can’t really understand or work with numbe...

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We could share the science or take a poll, but both might commit a type 0 error in problem solving.  Read on or play, your choice. Web201.23b Which is worse, Baggy Edges or Baggy Center ***201.23b – Baggy Edges vs Baggy Center...

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My number one pet peeve is plants that do not have a ‘threading’ or web path diagram for all of their web machines.  It is next to impossible to communicate w/o this tool.  The threading diagram should be provided by builders at the proposal stage and updated at the time of ord...

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Can You Spread a Baggy Edge?
Short answer no, medium answer below on my Web201 on YouTube, understanding given in my Web101 school offered as video-on-demand or in Brussels or in Charlotte. Web201.23a Can You Spread a Baggy Edge? ***201.23a – Can You Spread a Ba...

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Rollset Curl
Hello Doctor.  We have customer complaints about roll-set curl on our heavy grades.  Is there anything published that might help us set up the winder better or guide our customers on decurling? Much is published on manufacturing and laminating curl as you can find from the Roisum Li...

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Spreader Vibration
Spreaders, just like any roller, will vibrate.  Unfortunately, spreaders tend to vibrate much more and that can cause serious issues.  Learn more in the following clip. Web201.22e Spreader Vibration ***201.22e – Spreader Vi...

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The third day of AIMCAL’s web conference was notable.  Dilwyn Jones gave a modeling/measurement/mechanics paper on residual stresses during the manufacturing of electronic panels.  The approach was a nice balance between all (finite element modeling) and nothing (the norm being trial...

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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
Sep 09 - 10, 2014 - Brussels, Belgium
Web Handling and Converting
Sep 11 - 12, 2014 - Brussels, Belgium
Winding: Machines, Mechanics and Measurements
Nov 04 - 05, 2014 - Charlotte, NC
Web Handling and Converting
Nov 06 - 07, 2014 - Charlotte, NC
Winding: Machines, Mechanics and Measurements

View the entire AIMCAL Converting School class schedule »

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