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Web Lines | Unwritten Rules, Part 2

(Technical Reports)

June 08, 2015, ... rollers. Here are two more: 4. Overly narrow web vs. roller width is trouble, too. Don't run overly narrow web on wide rollers. You can get away with this, but overly wide rollers have overly high ...

Web Lines | Unwritten Rules, Now Written

(Technical Reports)

April 27, 2015, ... high tension, marginal tension, and low tension: High tension webs run straighter, have more traction on rollers, providing more force for spreading devices to prevent wrinkles. The high tension web ...

Web Lines | The Case of the Missing Pacer

(Technical Reports)

July 07, 2014, How can a system with only two slipping torque elements control speed? I recently visited a converter that had a rewinder with no apparent direct-driven pacer roller. The unwind had brake torque control, ...

Web Lines | Why Is Winding Optimization Difficult?

(Web Handling)

April 21, 2014, ... your Bachelor’s Degree is when you understand web tensioning, roller design, and guiding. Wrinkling and spreading get you your Master’s Degree program in web handling. Working with winding, winders, and ...

Web Lines | The Case for Shorter (and Longer) Acceleration Times

(Slit)

February 04, 2014, ... including the one that was running on this slitter, wrinkle much more at low speed. At higher speeds, air lubrication reduces the web-to-roller traction, reducing the ability of a roller to shift or gather ...

Coating Matters | Hot Melt Coating Technology, Part 2

(Coating/Laminating)

November 11, 2013, ... started out, compliant rubber back-up rollers were used. Because the coated film consistency was directly related to the geometry of the back-up roll, the industry began to move toward precision ground ...

Web Lines | Winding Process Fundamentals, Pt. 2

(Technical Reports)

February 18, 2013, ... roller is an effective tool to greatly reduce air captured in a winding roll. The air exclusion of a winding nip is directly a function of speed and inversely a function of effective radius (which is a ...

Web Lines | Why Avoid Nips?

(Web Handling)

September 24, 2012, ... here is a quick refresher on those topics. Avoid nips? Why? Nipped rollers are a top source of wrinkles and creases. Nipped rollers have the friction and pressure needed to shift, buckle, and fold ...

Static Beat | Unwinding Roll Tribocharging

(Static-Beat)

September 18, 2012, ... spindle and threaded through the first few rollers. To keep things simple, let’s assume that there is no static charge while the roll is stationary. Printed (or coated) product is commonly wound with ...

All Tape Supplies Offers Anti-Friction Tapes

(Label/Tape)

July 28, 2012, ETSB1000 and ETSB2000 anti-friction tapes from All Tape Supplies, in smooth and embossed versions, cover rollers in printing and adhesive industries   TILBURG, THE NETHERLANDS | ATS–All Tape Supplies ...

Labelexpo Americas | Mission Possible

(Label/Tape)

July 12, 2012, ...  The latest version of the butt splicer comes standard with a package of features, including ultrasonic sidelay sensors and spiral grooved rollers, for unwinding and splicing many clear film structures. ...

WHQuiz Answer #5 - Draw Control Pros/Cons

(Web Handling)

February 22, 2012, ... and one disadvantage of draw control (a.k.a. as speed ratio control)? Advantages: Draw control is the simplest intermediate tensioning system, requiring no rollers or feedback between driven rollers, ...

Web Lines | Test Your Web Handling Knowledge

(Web Handling)

February 14, 2012, ... tension variations across the web’s width (i.e., things would create a loose edge or center). 3. Tension Control—Name one advantage that using a dancer roller has over a tension load cell roller in a ...

Web Handling Workshops from TJWA & Optimation

(News | New Products)

January 26, 2012, ... use of spreader rollers. • Winding and Roll Defects—May 8-9. Understand the critical variables of winding, learn defect causes and remedies. • Web Handling Fundamentals—August 7-8. Quickly get an overview ...

Web Lines | Blocking in Rolls

(Web Handling)

January 12, 2012, ... final roll diameter, the winding speed, the cross-web thickness variations, but primarily by control of winding tension and winding nip roller load and their profile set points vs. roll diameter. Wound ...

Static Beat: Beat Winter Static

(Static-Beat)

November 22, 2011, ... brushes can be located 0 in. (contacting) ? 1 in. from the surface. 2. Rollers and Transport Belts Rollers, belts, and guides must be clean because your products accumulate static every time they touch ...

Web Lines: Take the Laminator Quiz

(Coating/Laminating)

October 16, 2011, ... to nip load force? or (b) If your nip is controlled by open or overlap gapping, do you have a procedure to measure the gap and set it repeatedly? 10 pts. 6. If you have a rubber roller in your nip system, ...

Idlers Do Away With Trapped Air

(Web Handling)

July 31, 2011, ... and the micro groove. Grooves are available on all company rollers, including aluminum, steel, stainless steel, and rubber covered idlers, and are offered in a variety of sizes and finishes. Webex ...

Best Papers Named At IWEB Conference

(Web Handling)

July 31, 2011, ... Emral Ltd., for “Web Tension Variations Caused by Temperature Changes and Slip-On Rollers” Jerry Brown, Essex Sysems USA, for “The Use of Conservation of Mass in Modeling Lateral Behavior in Moving Webs” ...

Static Beat: Why Static Is Worse at High Speeds

(Static Elimination)

July 31, 2011, ... fpm). Another reason that static problems get worse at higher speeds is that more static charge is separated between the film and each roller by tribocharging. The key factors for tribocharging are ...