Presses – Methods – With heating or cooling
Patent
1998-03-26
1999-11-09
Gerrity, Stephen F.
Presses
Methods
With heating or cooling
72245, 492 7, 492 46, 100 35, 100162B, 100329, 100334, B30B 1534
Patent
active
059793058
ABSTRACT:
A method and apparatus for controlling a deflection roll for compressing a web of material includes a shaft and a hollow roll disposed around the shaft. The hollow roll includes a working surface where the hollow roll is engageable with a hard roll along an entire length of the working surface. At least two bearing devices are disposed within the roll and are substantially aligned with the working surface of said roll. Each bearing device has a predetermined positive bearing clearance facilitating displacement of each outer contact surface relative to a respective inner contact surface of each bearing. The deflection roll further includes a mechanism for displacing the working surface of the roll with a fluid where the displacing mechanism is disposed external to the bearing devices. The displacing mechanism moves the working surface to at least one of a first, second, and third positions where the roll provides a force distribution along said working surface which substantially increases surface quality of the web of material.
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"Swimming Rolls, The Simple Answer to Effective Nip Control Under all Loading Conditions", by Hunt & Moscrop, Finishing Division of Voith Sulzer Papertechnology, 16 pages.
"Econip Rolls -The Efficient Way to Achieve Effective NIP Control", Voith Sulzer Papertechnology, 6 pages.
Appleton Papers Inc.
Gerrity Stephen F.
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