Vacuum roll transfer apparatus

Details Vacuum roll transfer apparatus Vacuum roll transfer apparatus

D - Textiles, Paper

21

F

34/23

D21F 5/04 (2006.01) D21F 3/10 (2006.01) D21G 9/00 (2006.01)

Patent

CA 1336228

A vacuum roll transfer apparatus is disclosed for drying a web extending through a single tier dryer section of a paper machine. The apparatus includes a rotatable perforate shell having a first and a second end. A stationary duct is disposed within and along the length of the shell between the ends of the shell. The duct is connected to a source of partial vacuum and the shell defines a plurality of holes along the length thereof such that in use of the apparatus, when the duct is connected to the source of partial vacuum, a partial vacuum is generated within a chamber defined between the shell and the duct. A flow restricting arrangement is disposed within the duct for generating a greater vacuum level adjacent to at least one of the ends of the shell for facilitating threading of a tail of the web.

609184

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