Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1997019299) FILTER ASSEMBLY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/019299 International Application No.: PCT/GB1996/002894
Publication Date: 29.05.1997 International Filing Date: 25.11.1996
Chapter 2 Demand Filed: 20.06.1997
IPC:
B01D 39/08 (2006.01) ,B01D 39/20 (2006.01) ,B01D 53/85 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
39
Filtering material for liquid or gaseous fluids
08
Filter cloth, i.e. woven, knitted or interlaced material
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
20
of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
53
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34
Chemical or biological purification of waste gases
74
General processes for purification of waste gases; Apparatus or devices specially adapted therefor
84
Biological processes
85
with gas-solid contact
Applicants:
NATIONWIDE FILTER COMPANY LIMITED [GB/GB]; NFC House Vickers Industrial Estate Mellishaw Lane Morecambe Lancashire LA3 3DY, GB (AllExceptUS)
WOOD, Fredrick, Ian [GB/GB]; GB (UsOnly)
Inventors:
WOOD, Fredrick, Ian; GB
Agent:
ATKINSON, Peter, Birch; Marks & Clerk Sussex House 83-85 Mosley Street Manchester M2 3LG, GB
Priority Data:
9523919.023.11.1995GB
Title (EN) FILTER ASSEMBLY
(FR) ENSEMBLE FILTRE
Abstract:
(EN) A filter assembly comprises a primary filter and a secondary filter of lower filtering efficiency than the primary filter. The secondary filter is treated with a biocide which serves to prevent or reduce biological contamination of the filter assembly. A preferred embodiment of the filter assembly comprises a copleated assembly of a glass fibre paper (primary filter) and a non-woven polyester matt (secondary filter) treated with a biocide. The filter assembly is particularly useful for use in air conditioning systems.
(FR) Cet ensemble filtre comprend un premier filtre ainsi qu'un second filtre dont l'efficacité de filtrage est inférieure à celle du premier filtre. On a traité le second filtre avec un biocide servant à empêcher ou réduire la contamination biologique de l'ensemble filtre. Un mode de réalisation préféré de l'ensemble filtre comprend un ensemble, plissé en même temps, d'un papier de fibre de verre (premier filtre) et d'une nappe polyester non tissée (second filtre) traitée à l'aide d'un biocide. Cet ensemble filtre est notamment utile dans des systèmes de conditionnement d'air.
Designated States: US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)