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1. (CA2082058) NONWOVEN FILTER AND METHOD OF MANUFACTURE

Office : Canada
Application Number: 2082058 Application Date: 02.05.1991
Publication Number: 2082058 Publication Date: 05.11.1991
Publication Kind : A1
Prior PCT appl.: Application Number:US1991003017 ; Publication Number: Click to see the data
IPC:
D04H 1/56
A24D 3/02
B01D 39/16
B29C 55/06
D TEXTILES; PAPER
04
BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
H
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING
1
Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40
from fleeces or layers composed of fibres without existing or potential cohesive properties
54
by welding together the fibres, e.g. by partially melting or dissolving
56
in association with fibre formation, e.g. immediately following extrusion of staple fibres
A HUMAN NECESSITIES
24
TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
D
CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
3
Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
02
Manufacture of tobacco smoke filters
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
39
Filtering material for liquid or gaseous fluids
14
Other self-supporting filtering material
16
of organic material, e.g. synthetic fibres
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55
Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02
of plates or sheets
04
uniaxial, e.g. oblique
06
parallel with the direction of feed
CPC:
A24D 3/0233
B01D 39/1623
B01D 2239/10
B29C 55/06
D04H 1/56
Y10S 55/05
Applicants:
Inventors: HASSENBOEHLER, CHARLES B., JR.
Priority Data: 519,132 04.05.1990 US
Title: (EN) NONWOVEN FILTER AND METHOD OF MANUFACTURE
(FR) FILTRE NON TISSE ET METHODE DE FABRICATION CONNEXE
Abstract: front page image
(EN) 2082058 9117297 PCTABS00008 A filter useful as a cigarette smoke filter is made by convergingly passing a flat restrained meltblown web successively through a heated zone (36) and a trumpet (24) to form a roving (25). The roving may be processed to make filters. The process results in stretch orientation of longitudinal fibers and bulking due to cross fibers. Primary and secondary pleats formed in the web are bundled into a cylindrical roving. The pleats add bulking to the web and provide fluid permeability through the filter.


Also published as:
EP0530251JPH05506809KR1019930700723AU1991078598MYPI 91000743WO/1991/017297