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- Baggy Webs: Part 4 Minimizing
- (Archive)
- July 31, 2007, ... your machines to baggy webs? Increase Tension—Pull out length variations. Bagginess that is pulled out with tension usually is not a problem. Eliminate Nips—If tension doesn’t pull out your bagginess, ...
- Under Pressure (A Brighter Look)
- (Archive)
- May 31, 2007, ... this possibility, but my eagerness to share a valued concept gave me the courage to share some results of my analysis of how to combine nip load and footprint calculations to find nip pressure. Fortunately, ...
- 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 ...
- Baggy Webs: Part I Nightmares
- (Archive)
- March 31, 2007, ... all baggy webs will have trouble running through nips without wrinkles. I hate to leave you with these nightmares, but you must face your demons before you can exorcise them. Over the next three columns, ...
- Under Pressure (Revisited...and Revised)
- (Archive)
- February 28, 2007, If I have any repeating theme to understanding web handling, it is to follow the stresses and strains. In nipped processes, you need to follow the compressive stress (aka pressure). Web Lines (Corrected ...
- 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 ...
- Twist & Shout
- (Web Lines)
- December 31, 2006, ... compensate for web bagginess, such as having an end-pivot roller upstream of a nip point. Twisting is used in some simple in-line folding processes, either twisting one-half of a web 180 deg to the other ...
- 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 ...
- CPP: Season Two
- (Magazine)
- September 30, 2006, ... on the hottest topic related to both winding and wrinkling: baggy webs. Learn how winding can create baggy webs; and how to measure and handle baggy webs — especially in nipped roller processes. ...
- What's Ne
- (Magazine)
- August 31, 2006, ... positioning for manipulation and lithography. PFFC-ASAP 497 Accessory for Static Control Simco Industrial Static Control, Hatfield, PA; 215/822-6401; www.simco-static.com The Junction Box is for ...
- New Products
- (Magazine)
- April 29, 2006, ... and other demanding multi- and monolayer film or thin-sheet applications. Features a high nip pressure option of 800 pli of force between the two primary rolls and includes a high-pressure lamination option ...
- The Secret Strain
- (Magazine)
- December 30, 2005, ... hard to get rolls tight enough, causing cinching and telescoping. How does strain help understand what happens between nip rollers? Nip rollers are the most complex strain analysis challenge. We use ...
- New Products
- (Magazine)
- December 30, 2005, ... on the nip rolls prevents over-tensioning of film during sealing and minimizes the possibility of distorting and breaking the web, company reports. Servo control of head pressure and distance-of-travel ...
- Mastering RFID, Part 2
- (Archive)
- September 29, 2005, ... and release liner. Ionizer 6 neutralizes the charge on the facestock with the inlays coming out off the nip after the vacuum applicator and cut-off unit. Ionizer 7 neutralizes the charge where the inlays ...
- Without Boundaries
- (Magazine)
- August 30, 2005, ... and Faria explain, the films should not be stressed any more than necessary. Low-temperature adhesives were specified to minimize thermal expansion of the materials. Nip pressures were controlled accurately ...
- The Converting Relay Race: Part II
- (Magazine)
- August 30, 2005, ... election. Surface unwinds eliminate the need for radial torque adjustments, but they are relatively rare due to their increased complexity and nip- related web defects. When inertial torque is more than ...
- New Products
- (Magazine)
- June 29, 2005, ... Automatic, Middleborough, MA; 800/544-0070; butlerautomatic.com The 1000 Series splicer combines zero speed technology with 99.9% reliability, says company. Features include rolling nip splice head, simple ...
- Heat Transfer Gets More Precise
- (Magazine)
- June 29, 2005, ... they go through a nipping process, Schulz says. "They want to minimize deflection. Customers trying to dial in their process closer and closer to be more precise, to minimize their downtime, make more and ...
- Drawing Conclusions: Part II
- (Magazine)
- May 30, 2005, ... sections (presses, slitters, small-wrap over rollers, and unnipped pull rollers) and for low-modulus or easily yielding webs. Large draws are used for film orienting and for separation after sheeting. ...
- A Communication from the PLACE Div. of TAPPI
- (Magazine)
- April 29, 2005, ... rolls are possible, the discussion covers five basic types to include crowned and concave idler rolls, grooved rolls that are either rigid or flexible, nip type, curved axis rolls and bars, and expanding ...