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Patent Searching and Data


Title:
【発明の名称】紙製機械のドライヤ
Document Type and Number:
Japanese Patent JPH11511816
Kind Code:
A
Abstract:
The dryer section in a papermaking machine has a single tier of all top felted dryer rolls six to nine feet in diameter. Air caps are employed over the dryer rolls to simultaneously dry both sides of the web to prevent curl and to increase drying rates. The air caps employ blown air at a temperature of 250-900 degrees Fahrenheit and air speeds of 8,000-40,000 feet per minute. The dryer fabric employed is foraminous with a permeability of between 300-1,200 cubic feet per minute per square foot and is designed to withstand peak temperatures of up to 900 degrees Fahrenheit and average temperatures of between 500-600 degrees Fahrenheit. A single transfer roll, or more advantageously, two grooved vacuum rolls in a vacuum box are disposed between the dryer rolls to maximize the circumferential wrap of the web and, at the same time, support and transport the web between dryer rolls.

Inventors:
デシュパンデ、ラジェンドラ・ディー
プルコウキー、ジェフリー・エイチ
Application Number:
JP54236197A
Publication Date:
October 12, 1999
Filing Date:
April 03, 1997
Export Citation:
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Assignee:
ベロイト・テクノロジーズ・インコーポレイテッド
International Classes:
D21F5/04; (IPC1-7): D21F5/04
Domestic Patent References:
JPH07189163A1995-07-25
JPH07252793A1995-10-03
JPH03174084A1991-07-29
JP3225315B22001-11-05
Foreign References:
US5495679A1996-03-05
US5495679A1996-03-05
Attorney, Agent or Firm:
石川 新 (外1名)