NL7710199A - Glass fibre paper filtration element for radioactive gases - is formed by pleated bands concertina folded into holder - Google Patents

Glass fibre paper filtration element for radioactive gases - is formed by pleated bands concertina folded into holder

Info

Publication number
NL7710199A
NL7710199A NL7710199A NL7710199A NL7710199A NL 7710199 A NL7710199 A NL 7710199A NL 7710199 A NL7710199 A NL 7710199A NL 7710199 A NL7710199 A NL 7710199A NL 7710199 A NL7710199 A NL 7710199A
Authority
NL
Netherlands
Prior art keywords
pleats
folded
bands
holder
radioactive gases
Prior art date
Application number
NL7710199A
Other languages
Dutch (nl)
Other versions
NL166859C (en
NL166859B (en
Original Assignee
Filtration Soc Ind De
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR94189A external-priority patent/FR1529632A/en
Application filed by Filtration Soc Ind De filed Critical Filtration Soc Ind De
Publication of NL7710199A publication Critical patent/NL7710199A/en
Publication of NL166859B publication Critical patent/NL166859B/en
Application granted granted Critical
Publication of NL166859C publication Critical patent/NL166859C/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B01D46/121—V-type arrangements

Abstract

Filter elements are produced in the form of bands for building into a filtration unit to be incorporated into a junction box in a duct along which harmful or radioactive gases are exhausted and have to be filtered. A porous fleece such as a paper of glass fibres is folded into a continuous series of pleats, refolded into a rectangular structure and packed into a holder with two openings facing each other. Along the crests of the undulating pleats at the two opposing sides, supporting strips are attached. These are then cut through in zones between the two crests of adjacent pleats, at a definite and uniform pitch, alternately on one side of the band and then on the other. Where the incisions allow it, the bands are then folded concertina fashion and packed into the filtration cell frame. The folding is effected automatically in a special purpose machine. The continuous web of filter paper being drawn from the reel, folded into continuous accordion pleats, whilst the stiffening strips are attached simultaneously. The hydraulic operating mechanism is controlled electronically together with the circular saw motors for the slitting of the supporting strips etc. Provides a much cheaper filter assembly than that formed from a large number of parts, including a housing with support plates for the pleated filter cloths, which need to be sealed all round with a large amt. of adhesive paste.
NL7710199.A 1967-02-08 1977-09-16 METHOD FOR MANUFACTURING A FILTER ELEMENT BY FOLDING AND MOUNTING A POROUS CORRUGATED FILM HARMONICA, AND PRODUCING PRODUCTS USED USING THE SAID FILTER ELEMENTS. NL166859C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR94189A FR1529632A (en) 1967-02-08 1967-02-08 Improvements to filter cells and their manufacturing process
NL6801609A NL6801609A (en) 1967-02-08 1968-02-05

Publications (3)

Publication Number Publication Date
NL7710199A true NL7710199A (en) 1978-01-31
NL166859B NL166859B (en) 1981-05-15
NL166859C NL166859C (en) 1981-10-15

Family

ID=26174671

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7710199.A NL166859C (en) 1967-02-08 1977-09-16 METHOD FOR MANUFACTURING A FILTER ELEMENT BY FOLDING AND MOUNTING A POROUS CORRUGATED FILM HARMONICA, AND PRODUCING PRODUCTS USED USING THE SAID FILTER ELEMENTS.

Country Status (1)

Country Link
NL (1) NL166859C (en)

Also Published As

Publication number Publication date
NL166859C (en) 1981-10-15
NL166859B (en) 1981-05-15

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Legal Events

Date Code Title Description
V4 Discontinued because of reaching the maximum lifetime of a patent