Sheet turn with vectored air supply

Details Sheet turn with vectored air supply Sheet turn with vectored air supply

1998-01-28

1999-12-21

Chin, Peter

Paper making and fiber liberation

Apparatus

Web creping or crinkling type

162193, 162271, 226 7, 226 971, 226 973, 2261961, 24261512, 24261521, B65H 5714

Patent

active

060044322

ABSTRACT:
In a papermaking machine for forming tissue paper, a turning bar is disposed having a curved surface about which a web of tissue paper is turned. The bar has an internal air plenum which supplies air to two sets of holes or slots. The first set is arranged to direct air normal to the curved surface of the bar or in the machine direction, the second set is arranged to direct air toward the edges of the tissue which is turned around the bar. The second holes or slots produce air jets which apply a cross machine direction tension to the web which prevents wrinkling of the web. The first set of holes or slots forms jets of air that prevent the tissue web from contacting the turning bar.

REFERENCES:
patent: 4342413 (1982-08-01), Reba
patent: 4919319 (1990-04-01), Ford et al.
patent: 5209387 (1993-05-01), Long et al.
patent: 5235733 (1993-08-01), Willbanks et al.
patent: 5464143 (1995-11-01), Hansen
patent: 5471766 (1995-12-01), Heikkila
patent: 5480086 (1996-01-01), Nakashima et al.
Smook, G.A., Handbook for Pulp & Paper Technologists, 2nd ed., (Vancouver, 1992) 316, 317, and 319, 1992.

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