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Web Handling & Converting

Blogmaster: Dr. David Roisum

28
Sir  I am facing a following problem from past few days.  Initially I calculate the outer diameter of the roll from the standard formula i.e.. Length = (OD²-ID²)*(¶/4)*(1/thickness) But nowadays I am not getting the correct length from this formula. Generally, my...

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26
Two-Drum Troubles - Nips
Two drums are the most intolerant of winding machines for several reasons.  Find out why in this first of a series of clips. Web201.26a Two-Drum Troubles - Nips http://www.youtube.com/watch?v=jI-LC_ZgjKc ***201.26a – Two Drum Troubles - Nips 07 Slides Duration 03.49 ...

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21
What does core crush, starring, telescoping, wrinkling and many other defects have in common?  They are actually composed of distinctly different defects that share only one rather trivial feature:  they have an outcome that looks similar.  This is not even useful for management and c...

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Posted in: Problem Solving
19
Light weight webs challenge man, machine and material.  Here is the last of 3 clips on drives.  To learn more there is no substitute for both a web handling and a web drive school. Web201.25c Drive Strategies for Light Webs 3 - Motors http://www.youtube.com/watch?v=2XoGaKLEZG0 ...

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14
A Wrinkle is not a Wrinkle is not a Wrinkle
I will never forget a corporate statistician who taught me years ago the importance of details.  He said, “if our company had invented the blood pressure machine, the first thing they would have done was lump diastolic and systolic blood pressure measures together so that they only had to...

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12
Light weight webs challenge man, machine and material.  Here is part 2 of 3 clips on drives.  To learn more there is no substitute for both a web handling and a web drive school. Web201.25b Drive Strategies for Light Webs 2 - Mechanical http://www.youtube.com/watch?v=MoBuTWdihuk...

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07
Analog is Way Better than Binary
No, I am not referring to computers, or at least not directly.  What I am referring to is the value of data such as waste.  It is common for Q/A to reject a roll for wrinkles, so we will take this an illustrative example of a more general principle that could be applied to most any waste c...

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05
Light weight webs challenge man, machine and material.  Here we begin a 3-part clip series on drives.  To learn more there is no substitute for both a web handling and a web drive school. Web201.25a Drive Strategies for Light Webs 1 http://www.youtube.com/watch?v=Tuqid2t8ENw ...

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01
9th Anniversary Thank You
Thank you loyal readers so very much for making this blog the most viewed in our web industries.  Those of you whom were there from the very first, of which there are something like one thousand, have seen the equivalent of 500 pages of web handling tech text.  Many of the posts are on sub...

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Posted in: New & Noteworthy
29
If you do a literature search on ‘load cell calibration’ in the (good, fast and free) RoisumLibrary by AbbottApp, you will find next to nothing of substance on the subject.  (The one exception written by an Allen-Bradley service engineer is for a very niche product; sectional roller...

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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.

Converting School

Dr. David Roisum's
Upcoming Classes
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 »

Contributing Authors

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Dilwyn Jones

Consultant
dilwyn.jones@physics.org

Duane Smith

Davis-Standard
SmithD@BC-Egan.com

Jerry Brown

Essex Systems
jlbrown@essexsys.com

Upcoming Webinars

Fri., Oct. 10, 2014
11:00 AM - 12:00 PM EDT

Telescoping of Wound Rolls

Presented by David Roisum, Ph.D., Finishing Technologies, Inc.

Telescoping is a catch-all term for at least 5 distinctly different mechanisms that would cause the roll edge to move during winding. This webinar sorts out which specific telescope you have and what you can do effectively to remedy it.
Register Now
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