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PPC Awards | JohnsByrne Earns Paperboard Package of the Year

(Carton Box)

October 27, 2013, ... perfectly in register. Its friction lock top and slit lock bottom closure simplifies fulfillment and allows for ease of packing and shipping.   RIGID BOX OF THE YEAR The Rigid Box of the Year award-winner ...

Kampf Slitter Has Many New Features

(News | New Products)

October 20, 2013, ... suited for working widths to 2,250 mm and a finished roll diameter to 630 mm.  Features include the air differential ball friction rewind shafts, laser-assisted and automatic core positioning, motorized ...

Pregis Introduces Sheet Foam with Multidirectional Stretch

(First Glance)

May 22, 2013, ... etc. Stretchfoam also offers the same high coefficient of friction (COF) long associated with the Microfoam line. This means that the sheet foam clings to the item it is protecting. (Low COF materials ...

Web Lines | Winding Process Fundamentals, Pt. 3

(Web Handling)

May 08, 2013, ... this four-part series, web handling expert Tim Walker discusses internal stresses and strain. Most wound rolls are held together with the friction. The tensioned (elongated) layers create pressure pushing ...

Web Lines | Winding Process Fundamentals, Pt. 2

(Technical Reports)

February 18, 2013, ... or nip load during the winding process. Some of these include: All the layers of a winding roll must transmit the applied center torque through the layer-to-layer frictional contact without slippage. ...

Web Lines | Winding Process Fundamentals, Pt. 1

(Technical Reports)

January 13, 2013, Understanding winding, roll defects, and winding-related web quality begins with understanding how the web, winder design, and process conditions combine to create the stress and strains of the wound roll. ...

Web Lines | Why Bigger Cores?

(Technical Reports)

November 15, 2012, ... winding torque into outer layer winding tension. First, they are at a mechanical disadvantage to the tension at the outside of the roll. Second, they have less area per layer to develop the friction needed ...

Gloucester Acquires Pearl Technologies

(Extrusion Coating)

October 17, 2012, ... and wicket attachments for converting equipment. Additionally, it offers customized performance enhancements built with low-friction surface technology for extrusion equipment such as collapsing frames, ...

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 ...

Winding Technology | Now Directly in the Drive

(Controls)

September 19, 2012, ... to approx. 10:1, good dv/dt compensation and friction required From experience, up to approx. 15:1 From experience, up to approx. 15:1, precise dv/dt compensation required From experience, up to ...

Montalvo Rotary Union Aids Air Flow

(News | New Products)

September 05, 2012, The tiny Micro Rotary Union from Montalvo injects air into any rotating shaft, offers low friction resistance, and has sturdy construction   GORHAM, ME | The Montalvo Corp., specialists in industrial ...

Catbridge Slitter Offers Speed, Versatility

(News | New Products)

August 26, 2012, ... The Model 900 runs in lay-on or gap winding modes and offers closed or open loop tension. Other available features include cam-lock or direct-friction style rewind shafts, auto knife positioning, laser ...

Montalvo Single-Disc Brake Suited for Printing

(Controls)

June 05, 2012, The CS-Series brake from Montalvo Corp. is recommended for printing applications, including narrow web, and offers high capacity and low inertia   GORHAM, ME | The Montalvo Corp. has developed a ...

Montalvo Offers Free Data Sheets

(Controls)

May 06, 2012, ... on friction modules and friction pad designs for the HP brakes, torque ranges, effective cooling speeds, and related accessories. Montalvo also offers a free data sheet on its U-25 series load cell, ...

Mach III Clutch Reports New Models

(Controls)

April 06, 2012, Nineteen new models of SensiFlex tension control clutches and brakes are on the market, including ones with ultra-low coefficient friction facings   WALTON, KY | Mach III Clutch announces nineteen ...

Gralex Unwind Stands Allow One-Person Changes

(News | New Products)

March 04, 2012, SRS Series unwind stands have self-adjusting friction brakes, lightweight shaft and core chuck assembly, and require no tools for changeovers   LEWIS CENTER, OH | Model SRS stationary unwind stands ...

WHQuiz Answer #8 - Nipped Driven Rollers

(Web Handling)

February 22, 2012, ... separating two tension zones? The capacity of an unnipped drive roller is an exponential function of web-to-roller coefficient of friction and wrap angle (in radians). For example, a COF of 0.3 and wrap ...

Web Lines | Blocking in Rolls

(Web Handling)

January 12, 2012, ... Roughness | Reducing contact area reduces the total force that can form in layer-to-layer bonding. Surface roughness also will tend to lower coefficient of friction and decrease the stiffness of the winding ...

Winding Film: How COF Properties Affect TNT

(Winding Unwinding Rewinding)

October 17, 2011, Your ability to apply tension/nip/torque winding principles to produce the desired roll hardness is affected by the film’s layer-to-layer coefficient of friction properties Your ability to apply tension/nip/torque ...

Web Handling: Top 7 Causes of Wrinkles

(Web Handling)

October 09, 2011, ... material. For example, when a web tries to expand and it is constrained by frictional contact with a roller, wrinkles are likely to occur. In these cases, a strategically located spreader roll—one with ...