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- Winding: What We Know & What We Don't Kno
- (Winding Unwinding Rewinding)
- July 31, 2008, ... the air entrained with and without a nip, side leakage during winding, and the loss of roll tightness as air escapes over time. The effects of dimensional changes due to viscoelasticity, temperature, ...
- A Recipe for Scratching
- (Web Handling)
- April 30, 2008, ... Use air or fluid to fully lubricate the web/roller interface. For narrow and stiff webs, use an undercut or dumbbell-shaped roller that makes contact only at the web edges. Use a tenter or edge nips to ...
- Quality Time
- (Gravure)
- March 31, 2008, ... Best of Show for this entry. Ten colors are printed on Fasson two-sided stamp stock using Siegwerk C-type solvent-based inks on a Dia-Nippon Kiko press with engravings by WRE ColorTech. The stamp is printed ...
- What's New Product
- (Magazine)
- March 31, 2008, ... to what will be encountered on-press, reports company. Printhead has micrometer-calibrated nip controls, as on earlier version, but now the anilox nip affects contact with plate, not with rubber transfer ...
- Roll Winding Dynamics
- (Web Handling)
- January 31, 2008, ... share of nip pressure, which may damage delicate materials; diametrical variations can result in an uneven stretching of the web around the roll so that the appearance of bagginess becomes a cause for ...
- Parallel Protocol
- (Web Handling)
- December 31, 2007, ... each time.) Finally, rolls that can be nipped and are used to apply a layer of coating onto a substrate, as shown in Figure 5, can have misalignment problems that lead to uneven coating thickness. This ...
- Differential Winding Limits: Part II
- (Magazine)
- November 30, 2007, ... or high winding nip loads. Radially Loading Systems In radially loaded shafts, the torque applied to a core is proportional (or nearly so) to the number of elements that grab the core, and each core ...
- Differential Winding Limits: Part I
- (Web Lines)
- October 31, 2007, ... material density, and roll width, you probably don’t have this important capability. Two last factors that add to torque are nips and inertias. If you use a winding nip roller to prevent air lubrication ...
- New Products, Part 1
- (Magazine)
- October 31, 2007, ... sensor is analyzing and to provide higher accuracy and speed. EMX Industries | 216-518-9888 | emxinc.com | PFFC-ASAP 404 Measure Nip Width Instantly The P-Nip handheld measurement device allows ...
- WHAT'S NE
- (Magazine)
- August 31, 2007, ... Proofing head works in combination with system’s precision speed and nip controls so operators can build an accurate fingerprint of any print station. Integrity Engineering | 763-856-4040 | perfectproofer.com ...
- New Publication on Winding Machines
- (Archive)
- August 22, 2007, ... Roll Geometry and Properties Simple Material Properties Introduction to Wound Roll Modeling Simple 1-D Models 2-D Models and Gauge Variation The Effect of Nip on Wound Roll Stresses The Effects ...
- Narrow Web New Products
- (Magazine)
- June 30, 2007, ... mandrel; variable pressure air controlled nip station; 360-deg register with remote control; and much more. PFFC-ASAP 403 Web Cleaner is Penetrating Teknek Ltd., Renfrewshire, UK; +44 (0) 141-568-8100; ...
- Driving R&D
- (Magazine)
- June 29, 2007, ... standards that would allow researchers to effectively manipulate and control a wide range of web handling variables. “We not only needed the right drive control technology, but we also needed someone ...
- Error alert!
- (Magazine)
- April 30, 2007, Thanks to an alert reader, I discovered some errors in the nip pressure table printed in the March column. The corrected table is online. Look for a full Thanks to an alert reader, I discovered some errors ...
- Reader's Choic
- (Magazine)
- February 28, 2007, ... 306. webexinc.com Manipulate Rolls Easily Vertical Center Lifts grip rolls from inside the core for safe and easy roll handling with the assistance of overhead cranes or hoists while keeping roll ...
- Product Protection
- (Technical Reports)
- February 28, 2007, ... both its moisture vapor transmission rate (MVTR) and its oxygen transmission rate (OTR) approach zero. However, when packages made with foil are subjected to the repeated manipulation and handling that ...
- Narrow Web What's Ne
- (Narrow Web)
- January 31, 2007, ... brake tension control; quick-release/removable nip roller with pneumatic pressure control; electronic web guidance system with ultrasonic sensor; and more. PFFC-ASAP 319 Foils Have No Seam Line ...
- Lessons in Laminating
- (Magazine)
- January 31, 2007, ... air bubbles. Increasing the nip pressure of the laminator seemed to be a simple solution. That helped, but it was not enough. Finding Solutions To achieve the line speed goal at high yield, the company ...
- How to Drive a Winding Roll
- (Web Lines)
- November 30, 2006, ... improved by using a close-proximity gap roller or a nip roller controlling the web’s entry into winding. In pure surface winding, the core is idling. All the work to drive the roll is applied to the ...
- Web Tension: A Pop Quiz
- (Web Lines)
- September 30, 2006, ... won't need a tenfold tension increase. Step 3: Bonus round (possible 10 points) Do you prefer unnipped or vacuum drive rollers over nipped drive rollers? (1 point) Have you used the belt equation ...
