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The Coefficient of Winding Trouble

(Web Lines)

April 30, 2009, ... both are known wrinkling causes. Combined with high friction and long entry spans, winding high COF webs quickly becomes a trip to Wrinkle City. High COF products often use controlled gap winding to ...

Hit the Apex at CMM

(Editorial)

March 31, 2009, ... University Conference Week will co-locate at CMM, addressing subjects from winding to tension, web alignment to slitting, and principles and techniques to improve web handling operations. Two pre-conference ...

The Great Span Length Debate | Part 2

(Web Lines)

March 31, 2009, Last month, we debated roller spacing (a.k.a. web span length) relative to cost, safety, out-of-plane deviations from gravity, bagginess, and misalignment. Let's continue the debate. Here a roller, there ...

Crowning Benefits

(Web Handling: Main)

February 28, 2009, ... crowning ensures accurate web alignment and counters the effects of deflection. In a simple nip system, roller deflection is one of the main reasons for nip variations across the width of the roll face. ...

How Much Misalignment Is Trouble?

(Web Lines)

January 31, 2009, ... the bending web lead to buckling and a gathered wrinkling web on the misaligned roller. Shear wrinkles have three prerequisites: a mechanism that causes the web to bend between span, usually roller ...

How Much Misalignment Is Trouble?

(Web Handling)

December 31, 2008, ... achievable, measurable, and will eliminate unwanted roller-induced wrinkles, lateral shifting, and edge flutter in most webs. What problems will occur if roller alignment is only accurate to 10 mils/ft? ...

Wrinkle Removers

(Tension)

November 30, 2008, ... speeds. There are all kinds of things that can happen to a web, so having tension controls at more points throughout the process makes sense to help maintain quality.” Conversely, if the tension is ...

What's New Product

(Magazine)

September 30, 2008, ...  PFFC-ASAP 402 Manage Static at Many Stations Ion Power, the next generation of company's Virtual AC static neutralizer, neutralizes over a range of 30 in. at web/material speeds of more than 3,000 fpm. ...

Winding: What We Know & What We Don't Kno

(Winding Unwinding Rewinding)

July 31, 2008, ... from web and core properties, tensioning profile, and roll geometry. Though a winding roll is a continuous spiral, almost all models treat a wound roll as a series of pre-tensioned elastic rings or hoops. ...

New Products, Part 1

(Magazine)

October 31, 2007, ...  Stafford Mfg. Corp. | 800-695-5551 | staffordmfg.com | PFFC-ASAP 400 Sense Objects On Web The RPS-40-5 ultrasonic sensor with a detection range fixed at 0.5-5 in. is useful for sensing objects ...

WHAT'S NEW PRODUCT

(Magazine)

September 30, 2007, ... Machinery Co. | 401-596-0162 | maxsonautomatic.com | PFFC-ASAP 327 Produce Coreless Rolls Newly designed rewind shaft allows existing owners of company’s high-speed, wide web rewinders to produce ...

Product Protection

(Technical Reports)

February 28, 2007, ... on the other side for laminations and cold-seal applications (see Figure 1). It is designed for use as either an inner web of a lamination with converter-applied cold seal or as the middle ply of a multilayer ...

Don't Get Bent out of Shap

(Magazine)

January 31, 2007, Bending a web is like bending a pencil or a wire. A little bending is no problem, but if you go too far, something will get bent out of shape or break. Web Lines Bending a web is like bending a pencil ...

Twist & Shout

(Web Lines)

December 31, 2006, A wrinkle is the web’s equivalent of a shout—stop it, you’re hurting me! To avoid your web shouting at you, think about how to apply uniform tension across it. Web Lines A wrinkle is the web’s equivalent ...

Cure Cockling

(Magazine)

November 30, 2006, ... in the third dimension, separating away from the tape and the adhesive web. Cockling is caused not only by humidity but also by fluctuations in temperature. Elevated temperatures can dry out and damage ...

New Products

(Magazine)

October 31, 2006, ... smooth out wrinkles by inducing a spreading or widening action on the moving webs. Said to be especially valuable when running multiple lightweight webs, when a fixed bowed roll is placed before each decurl ...

CPP: Season Two

(Magazine)

September 30, 2006, ... more info on CPP, contact H.A. Bruno at 201/543-5060 or visit www.cppexpo.com. The Conference Program Monday, October 30 Web Handling: Rollers Part I — Effects on the Web — 9:00-9:50 A.M. This ...

What Makes Winding Difficult?

(Archive)

July 31, 2006, ... larger rolls mean more pressure, more stress, and more diameter differential from crossweb thickness variations. On the good side, when Et/Er is high, roll compression reduces diameter variations and ...

A Bunch of Hot Air

(Magazine)

April 29, 2006, There are reasons why your dryer could be giving you a headache. Here's what you can do about it. Dryer Technologies Web dryers actually are fairly simple process machines despite an apparent myriad ...

If Not Rough, How About Groovy?

(Magazine)

February 27, 2006, Even though rough surfaces have a bad reputation, rough is better than smooth to fight lubrication from air or liquid lubrication. But is rough the best solution? Web Lines Last month I presented the ...