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Are You Rough Enough?

(Magazine)

January 30, 2006, What is the better roller surface to prevent web scratching, smooth or rough? Many people will opt for smooth, but in fact, this is the wrong direction. Web Lines Rough necks, rough language, rough ...

To Serve & Protect

(Magazine)

October 30, 2005, ... is formed. Avoid high shear so you can achieve maximum stability. Use only recommended application techniques: reverse gravure, smooth roll Mayer rod, fountain-less gravure with smoothing rollers, or ...

New Product Digest, Part 1

(Magazine)

March 30, 2005, ... unit comprises a Model 3700 power controller and XR ionizer. XR bar is equipped with tungsten emitters for long life and dependable service, company says. Visit booth 3276. Process Plates in Two Ways ...

Why Tension?

(Magazine)

January 30, 2005, ... dogs or sheets hanging in the wind to be left untensioned. Tensioning the web in spans and over rollers gives stiffness and straightness not necessarily inherent in the web. Tension-induced stiffness ...

Who Likes Film?

(Magazine)

December 30, 2004, ... The very film properties we like in product design come back to haunt us in film handling. Nonporous means air is trapped between the web and roller. Low tension means less driving force to squeeze air ...

Keeping it Clean

(Magazine)

October 30, 2004, ... self-cleaning units utilizing specially formulated elastomeric tacky roller coverings that are gentle on substrates but capable of picking off very small particles,” he says. He also believes the developments ...

Can't Touch This (Web): Part

(Magazine)

May 31, 2003, ... up and returns from the dryer heading down, leaving 180 deg of wrap for all one-sided web handling functions in between. If the dryer has ten idler rollers, we have 18 deg for each. However, if we also ...

Can't Touch This (Web): Part

(Magazine)

March 31, 2003, ... wait before any roller “sits” on the fresh paint. The touch-free zone starts at the coating head and extends into the drying or curing oven. Here “no contact” is qualified as one-sided and temporary.  ...

Five Questions and Answers on Lubrication

(Magazine)

September 30, 2002, ... turns. However, unintended air lubrication on rollers and in the winding roll may be a bad thing. Air lubrication needs to be understood and controlled to prevent loss of web tension, guiding, and winding ...

Goldilocks and the Three Bears Deal with Traction Problems

(Magazine)

July 31, 2002, Rollers are the hands of web handling the hands we use to grip the web to meet our goals for web speed, position, and flatness. To be able to position Rollers are the hands of web handling — the hands ...

DOVIDs: Functional Beauty

(Magazine)

July 31, 2002, ... peaks and valleys on the plate surface, which are reproduced on the surface of a micro embossing roller using electro-forming processes. This is used to emboss directly onto polymer films or onto specialized ...

Coating Control, Quality, & Paperboard Packaging

(Magazine)

April 30, 2002, ... coating as they do to apply the ink. On offset presses, the coater usually falls into one of two categories; roll coater or anilox (flexo) coater. There are many different configurations of roller coaters. ...

Measurement technique improves metallized PP

(Magazine)

November 30, 1995, ... coincided with physical peaks in the film. Three types of pin-windows were identified. In the first type, the small peaks apparently act as load-bearing points as the film travels over rollers or is ...