Web Lines

The Converting Relay Race: Part II

Our rolls are loaded, spliced, and ready to run. To complete the unwinding relay, we need to finish strong with our plan for web alignment and tension control.

The Converting Relay Race: Part 1

Converting productivity is a race to see how much material we can get through our process. Instead of a marathon, with one runner going the distance, converting processes are more like relay races, with a series of runners. Like a relay, we need to pass baton from roll to roll so each roll can run their leg of the race.

Concave Rollers Pros & Cons

Got some nasty wrinkles on a roller? Some tape here, some tape there—wrinkles be gone. Adding tape collars or bands to a cylindrical roller just under each of the web’s edges turns a cylindrical roller into a wrinkle-stopping concave roller.

Drawing Conclusions: Part II

The principles of draw control usually create a good deal of confusion. Let’s pick up where we left off in my last column and see if we can move from drawing confusions to draw control conclusions.

Drawing Conclusions: Part 1

In planning the tension control for any web line, there are only three options: tension control, torque control, and draw control. Between any two rollers or rolls controlled by a motor, brake, or clutch, you have to select one of these three choices.

Clean Thinking

What is your definition of clean? What people think of as "clean enough" in their home is staggeringly different. Hopefully, your definition for your converting operation is the same as that of your customers.

Get Out of the Scroll Business

Curl will kill your product. How do webs end up curly? Let’s go over the top causes and consider how to eliminate them.

Why Tension?

Why is tensioning such a crucial first step? What are the benefits of a well-tensioned web? What is the right amount of tension for your product? Don’t slack off now...keep reading for these answers and more.

Who Likes Film?

Customers like films because they are cool. Films can be clear, thin, shiny, clean, and elastic. Product designers like films because they are functional. Films can improve a product’s break strength, tear resistance, and gas barrier performance. Process people like films because…wait. Do process people like films?

The Harms of Harmony

From a simple handling viewpoint, these harmonic motion hiccups may be no problem, but combined with coating, extrusion, slitting, or winding operations, they may lead to waste.

Slitting Debris: Cracking the Case

Dust and debris are a common but unwanted side product of slitting. Slitting debris comprises the small particles that break off a product's edge during the slitting process. It is created through fracture and abrasion. Uncontrolled slitting debris will lead to defects in your customer's product and equipment downtime.

10 Tips on Antiwrinkle Rollers

Antiwrinkle rollers, like antiperspirants and anti-inflammatories, have a name that implies a cure to your problem. But as with most remedies, read the

Can This Lamination Be Saved?

Delaminating undesired separation within a multilayer product is a major problem for many converters. Laminate products are a marriage of two or more

The Signs of Shear Wrinkle

Your web is talking to you. Not out loud but in a form of sign language. It's saying, Oh, I'm shifting to the right (or left) in this span, or Ouch, I'm

Tracking Wrinkles: Part II

The easiest way to explain roller diameter variation tracking is to walk you through the chain of events. Diameter variations create web strain variations.

Tracking Wrinkles: Part I

When traffic is heavy on a multi-lane freeway, staying in your lane is critical. We trust the other drivers in the cars next to us will stay in their

When Rollers Fight, Webs Lose

A tram is a coal bin with wheels. If you want your coal bin to stay on its tracks, you must keep the two axles parallel. If they are not parallel, the

Fun with Force Gauges

In today's world of high-tech electronic gadgets, a force gauge may seem unglamorous, but I hope to convince you a force gauge is something you should have and use.

Reduce Web Nip Problems

Web handling is about transport and delivery, getting from point A to point B, without damaging the product. It is relatively easy to move a web across a free span or over an unnipped roller, but getting into and through a nip can be a show stopper for many processes or products. As a web handler, you should consider nips your tough customers.

Friction Circles on a Winter's Day

Doing doughnuts — this was the term my high school friends called the art of driving around in snow-covered parking lots, spinning your back tires during a hard turn to get your car to fishtail in a circle.

Linebackers, Leashes, & Superman: A Look at Stress

Do you work well under pressure? How you react is dependent on the level of pressure or stress exerted on you. How your product reacts to pressures or stresses also will depend on the stress level it feels.

Small Flexing, Big Benefits

All spiral rollers, whether rigid or flexible, are con artists. Their turning roller's barber pole optical illusion tricks your eye. The rotating spirals, starting at the roller center, create a sense of outward motion.

Where Does a Spreader Spread?

Spreader rollers are important tools for web handlers with two main applications. First, they can spread a web after slitting, creating a gap between

Pay Attention to Tension

Our web handling expert reveals the subtle secrets of the slitting/rewinding process.

Going with the Parallel Flow

Parallel flow usually is a good thing. In driving your car down the road, if you and the other drivers agree to keep parallel to the lines in the road,

A Slippery Answer to Web Scratching

What percent slippage in idler roller speed relative to web speed is required to create scratches? Answer #1: Zero percent slip. Scratches are a form

Can't Touch This (Web): Part 3

Over the last two months, I have reviewed why some webs demand U Can't Touch This and web line options for true touch-free web handling. This month, let's

Can't Touch This (Web): Part 2

Last month we covered the web and process motives for touch-free web handling. This month we ll begin to review web line options for Can t Touch This

Can't Touch This (Web): Part 1

More than a decade ago, rapper MC Hammer made famous forever the line U Can't Touch This. I've worked with converters who use this phrase to describe

Cinching Belt Tightening Gone Bad: Part Two

The expression it's a cinch usually means something is easy, as easy as tightening a belt. However, as we learned last month, cinching is not something

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