Filter

Details Filter Filter

1977-01-07

1980-02-19

Silverman, Stanley S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

93 1C, 131267, 428171, 428172, 428286, 428288, 428290, 428296, B32B 330, B32B 2310

Patent

active

041895118

ABSTRACT:
Improved tobacco smoke filters, particularly cigarette filters, are prepared from a web of synthetic polymeric fibers having applied to at least one surface thereof a film-forming derivative of cellulose. Continuous processes and apparatus for the production of the web and filter are also described.

REFERENCES:
patent: 2966198 (1960-12-01), Wylde
patent: 3148101 (1964-09-01), Allmas, Jr. et al.
patent: 3214323 (1965-10-01), Russell et al.
patent: 3220904 (1965-11-01), Torsy et al.
patent: 3282771 (1966-11-01), Goodman et al.
patent: 3341394 (1967-09-01), Kinney
patent: 3407822 (1968-10-01), Touey et al.
patent: 3595731 (1971-07-01), Davies et al.
Roberts, A. G., Organic Coatings, Properties, Selection and Use, Building Science Series 7, pp. 38-41, Feb. 1968.
"TYVEK", Spunbonded Olefin, Bulletin S-10, Dec. 1973, Dupont Technical Information.

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