Press felt for papermaking

Details Press felt for papermaking Press felt for papermaking

2004-02-20

2008-10-28

Cole, Elizabeth M (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

C442S183000, C442S286000, C162S358200, C162S900000

Reexamination Certificate

active

07442426

ABSTRACT:
A papermaking press felt comprises a base body, a batt layer, and an anti-rewetting layer comprising a non-oriented film, all intertwiningly integrated by needle punching. The anti-rewetting layer has openings with a three-dimensional structure, with an aperture on the paper web side larger than the aperture on the roll side. This press felt exhibits an excellent anti-rewetting effect while maintaining its water removing capability.

REFERENCES:
patent: 4446187 (1984-05-01), Eklund
patent: 4830905 (1989-05-01), Gulya et al.
patent: 5071697 (1991-12-01), Gulya et al.
patent: 5372876 (1994-12-01), Johnson et al.
patent: 6159880 (2000-12-01), Schiel
patent: 2003/0051848 (2003-03-01), Watanabe
patent: 3-8888 (1991-01-01), None
patent: WO 03029558 (2003-04-01), None

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