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- WHQuiz Answer #2 - Crossweb Tension Variations
- (Web Handling)
- February 20, 2012, ... diameter variations vs. width. Crossweb dimensional variations, either permanent (bagginess or skew) or temporary (from temperature or moisture variations) Splicing misalignments Bonus Question: ...
- WHQuiz Answer #1 - The Right Tension
- (Web Handling)
- February 20, 2012, ... If you know you have modest machine or crossweb direction tension variations from roller variations, web bagginess (especially if you web is narrow), misaligned splices, and roller drag / inertia, then ...
- Web Lines: Take the Laminator Quiz
- (Coating/Laminating)
- October 16, 2011, ... (avoiding deflection-induced wrinkles)? 5 pts. 19. Do you set pre-laminate tension high enough to pull out product bagginess? 3 pts. 20. For cambered or skewed webs, do you have an adjustable roller ...
- How To Wind Defectless Hard, Round Rolls
- (Winding Unwinding Rewinding)
- June 29, 2011, ... high caliper areas building on each other o Gauge bands that produce corrugations or rope marks in the tightly wound roll o Bagginess upon unwinding • Wind sufficient air in low areas ...
- The Holy Grail, Six Tips for Winding
- (Web Handling)
- June 29, 2011, When winding film, the Holy Grail is to achieve round, hard rolls without defects. These areas require adherence to consistently achieve success. 1. Be sure the web material is as flat as possible ...
- Web Lines: Would You Like Nips with That?
- (Winding Unwinding Rewinding)
- March 31, 2011, ... processing that quickly turn into value-subtracting wrinkling machines. Nip-related waste may be your web supplier's fault (excessive bagginess), or your equipment supplier's fault (undersized rollers ...
- Show Preview - Forecast for Orlando: ICE
- (Trends/Management)
- January 31, 2011, ... Bill Poulson, Harper Corp. of America 11:00-11:30 a.m. The Emerging Role of UV LED Curing in Web and Packaging Processes: Paul Mills, Consultant for Integration Technology Ltd. Quantifying Web Bagginess: ...
- Web Lines: Blow Away Your Roller
- (Web Handling)
- December 31, 2010, ... acceptable insensitivity to crossweb tension variations from misalignment or web bagginess Accounting for the diameter and float height in the elevation change with the entry to exit rollers Supplying ...
- Web Guiding | Lateral Motion Causes
- (Web Lines)
- March 31, 2010, ... costs. Lateral Errors in Web Transport | The five big causes that shift the web are misalignment, diameter variations, web camber/bagginess, uneven nipping, and interaction of the web to air or fluid ...
- What Is the Right Tension?
- (Web Lines)
- November 30, 2009, ... in both the machine and crossweb direction. Tensions in a web line vary like temperatures in a home. Tension will vary crossweb from roller misalignment, roller diameter variations, web bagginess, and ...
- Playing the Wrinkle Blame Game
- (Web Lines)
- June 30, 2009, ... you create wrinkles at unwinding or handling over your rollers, then don't blame the roll's supplier. You might be handicapped if their bagginess is too high (another defect that usually develops within ...
- Stress & Strain
- (Archive)
- May 31, 2009, ... baggy webs in and out of slitting where knowledge eliminates waste. Tension is the first line of defense against bagginess. A baggy web under no or low tension will show its crossweb length variations ...
- 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 ...
- The Great Span Length Debate | Part 1
- (Web Lines)
- February 28, 2009, ... CAD drawings of web lines show rollers and webs as circles with tangential connecting lines. Real webs will sag and flutter from gravity, web bagginess, and roller misalignment. Gravity is most obvious ...
- Winding: What We Know & What We Don't Kno
- (Winding Unwinding Rewinding)
- July 31, 2008, ... our ability to model real world winding. Work is underway in this area, but predicting when crossweb defects, such as bagginess or regional buckling, will or will not form is not here…yet. In winder ...
- 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 ...
- Differential Winding Limits: Part II
- (Magazine)
- November 30, 2007, ... bagginess at slitting. If differential shafts are turned up to a torque beyond the capacity of the driving motor or clutch, they won't slip differentially and you'll be winding on the world's most expensive ...
- Baggy Webs: Part 4 Minimizing
- (Archive)
- July 31, 2007, What does minimizing a baggy web mean? Two things. First, we would like to minimize the level of bagginess in our webs. Second, we would like to minimize the waste associated with running the inevitable ...
- Baggy Webs: Part III-Causes
- (Magazine)
- June 30, 2007, ... process usually has only a small amount of bagginess. Yes, if there are gross errors in the webmaking processes, if film heating, stretching, and cooling are uneven, if paper forming or moisture content ...
- Baggy Webs: Part II Measuring
- (Archive)
- April 30, 2007, ... or by time. Regarding baggy webs, what should you measure? Bagginess by itself isn't usually a problem until 1) you try to run the baggy web through a nip, or 2) it is so bad the web wrinkles or your ...