Bowed Rolls Technical Tips for Removing Web Wrinkles

Nim-Cor bowed rolls smooth out web wrinkles by inducing a spreading or widening action on a moving web of paper, film, textiles, etc. To obtain the best results, use the guidelines and installation suggestions below.

Perma-Bow™
The Perma-Bow™ has a bow of fixed dimensions and is widely used where operating conditions remain fairly constant. The amount of bow depends on the web material, face width, tension and arc of contact between the material and the bowed roll.

Ajusta-Bow™
By virtue of the adjustable bow feature, the Ajusta-Bow™ enables the roll to be effective under a wide variety of operating conditions.

BOW AND WRAP GUIDELINES BOWED ROLL APPLICATION WRAP ANGLE (DEGREES) BOW (% WORK FACE) SLIT SEPARATION FILM AND PAPER 30 - 150 0.5 - 0.75 WRINKLE REMOVAL ON FILM 30 - 90 1.0 - 1.125 WRINKLE REMOVAL ON PAPER 20 - 90 1.25 - 1.5 WRINKLE REMOVAL ON TEXTILES & NON WOVEN 45 - 120 2.0 - 2.5 TO INCREASE WIDTH ON TEXTILES & NON WOVEN 60 - 150 5 - 7 NOTE: CONSIDER DRIVEN ROLL IF BOW IS OVER 5%