EP0243952A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method for manufacturing and reinforcing a catalytic unit intended for purifying exhaust gases
Assignee: Kemira Oyj
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Filing: 1987-04-29
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Granted: —
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Expires: 2007-04-29
Abstract
Abstract The invention relates to a method for making and reinforcing a catalytic unit intended for purifying exhaust gases, in which method a helical catalytic unit is formed from a corrugated foil band (2) and a straight foil band (3), placed one on top of the other, by securing the foil bands, coated in advance with both a layer of support material and a layer of catalyst material, to a central shaft (4), around which the catalytic unit is formed. Thereafter, end supports (5) are secured to the ends of the shaft in such a way that they press somewhat to inside the unit and prevent movement of the foil bands in relation to each other.
Inventors
- 👤 Kauko Kanniainen
- 👤 Veikko Loukeinen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 05:03
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; B; B01; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2260/00; F01N2260/18; F01N2330/00; F01N2330/02; F01N2330/04; Y; Y10; Y10S; Y10S55/00; Y10S55/30; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A method for making and reinforcing a catalytic unit used for the purification of exhaust gases, by forming a helical catalytic unit (1) from a corrugated foil band (2) and a straight foil band (3) placed one on top of the other, characterized in that the corrugated and the straight foil bands, coated in advance with both a support-material layer and a catalyst layer, are secured to a central shaft (4), around which a catalytic unit of the desired size is formed, whereafter rigid end supports (5) are secured to the ends of the shaft in such a way that they press somewhat to inside the catalytic unit, thereby preventing movement of the foil bands in relation to each other.
Claim 2
Independent Claim
120 words
A method for making and reinforcing a catalytic unit used for the purification of exhaust gases, by forming a helical catalytic unit (1) from a corrugated foil band (2) and a straight foil band (3) placed one on top of the other, characterized in that the corrugated and the straight foil bands, coated in advance with both a support-material layer and a catalyst layer, are secured to a central shaft (4), around which a catalytic unit of the desired size is formed, whereafter rigid end supports (5) are secured to the ends of the shaft in such a way that they press somewhat to inside the catalytic unit, thereby preventing movement of the foil bands in relation to each other.
Claim 3
Dependent Claim
30 words
A method according to Claim 1, characterized in that at both ends of the central shaft (4) there are slits (6) into which the end supports are pressed and secured.
Claim 4
Dependent Claim
13 words
A method according to Claim 2, characterized in that the slits are parallel.
Claim 5
Dependent Claim
21 words
A method according to Claim 2, characterized in that the slits run in different directions, preferably being perpendicular to each other.
Claim 6
Independent Claim
29 words
A method according to any of the above claims, characterized in that at least one of the end supports is made up of one or several supports disposed crosswise.
Claim 7
Independent Claim
26 words
A method according to any of the above claims, characterized in that the end supports are secured by welding to the ends of the central shaft.
References Cited (Backward Citations)
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