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Web Handling & Converting

Blogmaster: Dr. David Roisum

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Problem Solving

01

The Best Control Panel

Posted by David Roisum on February 1, 2011
The Best Control Panel
A new game. Below is a picture of something like a gold-standard of design. Tell us why and win a private answer (via phone or email) on any web handling topic. Click on comment link below to enter your idea.

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Posted in: Design, People, Problem Solving, Tension/Drive Control
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17

English vs. US Customary Units

Posted by David Roisum on January 17, 2011
I was born into a background of ‘English’ Units of measure.  While I was in grade school most of the African and Indonesian nations were completing metrification; the last holdout being South Africa which converted in 1968 following the lead of Britain which converted three years ea...

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Posted in: History, Problem Solving
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15

Portable iRoll

Posted by David Roisum on January 15, 2011
Portable iRoll
Sensors embedded in rollers are not new.  They have been done for decades in the lab and are now commercially available in covers from several high-end suppliers.  What seems to be new is a hybrid system wherein a temporary sensor can be applied to a (winding) nip roller in a production en...

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Posted in: Measurement, New & Noteworthy, Nips, Problem Solving, Web Manufacturing, Winding
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08

Web and Roll Center at PAPRICAN

Posted by David Roisum on January 8, 2011
Web and Roll Center at PAPRICAN
I reported on my visit to this unique lab in Montreal in my 7/17/2011 post.  This is just an update to point to their new website page.  While I hesitate using trade-names in any public discussion, I make exceptions when the case is exceptional.  If you have any of the following issue...

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Posted in: New & Noteworthy, Problem Solving
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06

Can a Sagging Roller Act Like a Bowed Roller?

Posted by David Roisum on January 6, 2011
Can a Sagging Roller Act Like a Bowed Roller?
Yes, but probably not for the vast majority of applications. First, you would have to be fortunate enough to have a location where the web traveling approximately straight down so that the gravity induced ‘bow’ would be approximately in the direction required by bowed roller spreading. ...

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Posted in: Design, Problem Solving, Rollers, Spreading
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01

Web Handling Pundit Predictions

Posted by David Roisum on January 1, 2011
This is the time of the year when pundits make predictions.  Not me though, because I just found out that expert predictions are only ever so ensie tinsie slightly better than tossing a coin.  Further, this tiny advantage is ONLY for a rare type of expert, the ‘fox.’  Foxe...

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Posted in: New & Noteworthy, Problem Solving
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20

We didn’t used to have this problem (as much)

Posted by David Roisum on December 20, 2010
Probably not true at all. You probably had that problem on that product on that machine since day one. What probably has happened is that people overlooked it for the most part. Now somebody, perhaps a fussier customer, perhaps a boss, noticed.

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Posted in: Problem Solving
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25

A Customer from Hell

Posted by David Roisum on November 25, 2010
In my classes I teach that there are no effective "tricks" to enable you to run a baggy web that you have not probably already tried: Increase/decrease tension, use effective spreading. Thus my advice in the Baggy Web Troubleshooting section of my Web101 is to send the material back to the supplier...

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Posted in: Problem Solving, Wrinkling & Flatness
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30

Lemon Gojo

Posted by David Roisum on October 30, 2010
Lemon Gojo
I learn so much from the people I work with.  Sometimes it is from my clients, other times from students and in this case from operators.  One of my students in a recent class remarked that they used Lemon Gojo for cleaning up sticky messes on rollers and other equipment.  The idea ca...

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Posted in: (Other) Converting, Maintenance, Problem Solving, Rollers, Safety
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07

The Most Useful Question

Posted by David Roisum on October 7, 2010
The most useful question is “Can you make it worse?” Of course, management wants you to make it better. However, you probably don’t know how to make it better (except for possibly via options that are constrained) otherwise you would have already done so. On the other hand, most...

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Posted in: Problem Solving
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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.