Method of preparing paper for filter bags, apparatus for impleme

Details Method of preparing paper for filter bags, apparatus for impleme Method of preparing paper for filter bags, apparatus for impleme

1993-05-12

1996-06-18

Lamb, Brenda A.

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

162109, 1621571, 55528, 55382, 210508, 428198, D21H 1300

Patent

active

055274293

ABSTRACT:
A method of preparing paper for filter bags, the method of the type comprising a step during which a non-woven paper is prepared comprising two superposed layers, namely a layer based on synthetic fibers and a layer of cellulose fibers, by a technique which is known per se, wherein the method includes a subsequent step of subjecting the non-woven paper to a calendering operation between a support structure and a heated cylinder having projections. The present invention also provides apparatus for implementing the method and products obtained in this manner.

REFERENCES:
patent: 3323983 (1967-06-01), Palmer
patent: 3350260 (1967-10-01), Johnson
patent: 3470052 (1969-09-01), Herman
patent: 3478141 (1969-11-01), Demsey et al.
patent: 3775244 (1973-11-01), Hubschmann
patent: 4135024 (1979-01-01), Callahan
patent: 4289580 (1981-09-01), Elston et al.
patent: 4590114 (1986-05-01), Holtman
patent: 4770920 (1988-09-01), Larsonneur
patent: 5173154 (1992-12-01), Heinrich
Pulp and Paper, Chemistry and Chemical Technology, vol. III, 3rd Edition (Casey) New York, N.Y. pp. 1751-1755.
Abstract Bulletin Of The Institute Of Paper Chemistry, vol. 51, No. 6, Dec. 1980, Appleton, US. p. 680 S. Ohyama, "Manufacture of Filter Paper".

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