Vacuum guide roll apparatus,申请号US19900525380-传众专利搜索

Vacuum guide roll apparatus

申请公布号：US5020238(A)

申请号：US19900525380

申请日期：1990.05.17

申请公布日期：1991.06.04

申请人：

BELOIT CORPORATION

发明人：WEDEL, GREGORY L.;ROERIG, ARNOLD J.

分类号：F26B13/16

主分类号：F26B13/16

摘要：A vacuum guide roll apparatus is disclosed for guiding a web between an upstream dryer and a downstream dryer of a dryer section. The apparatus includes a perforate roll shell having a first and a second end. The shell defines an elongate chamber which extends between the first and the second ends. A first and second shaft are rigidly secured to and disposed coaxially relative to the shell. The shafts are disposed adjacent to the first and second ends respectively of the shell. The shafts define respectively a first and second journal. A first and second bearing cooperate with the first and second journals respectively for rotatably supporting the roll shell. A housing is disposed coaxially relative to the shell and adjacent to one of the shafts. The housing defines a passageway which is connected to a source of partial vacuum. A first annular seal is disposed between the housing and the one shaft for sealing the housing relative to the one shaft. A second annular seal is disposed between the housing and the shell for sealing the housing relative to the shell so that when the shell rotates relative to the housing, the passageway is sealingly connected to the elongate chamber such that a partial vacuum is generated within the chamber for urging the web towards the perforate shell.