WO1991019081A1 - Catalytic converters - Google Patents

Catalytic converters Download PDF

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Publication number
WO1991019081A1
WO1991019081A1 PCT/GB1991/000760 GB9100760W WO9119081A1 WO 1991019081 A1 WO1991019081 A1 WO 1991019081A1 GB 9100760 W GB9100760 W GB 9100760W WO 9119081 A1 WO9119081 A1 WO 9119081A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
plastics
plastics material
fibrous material
catalytic converter
Prior art date
Application number
PCT/GB1991/000760
Other languages
French (fr)
Inventor
John Edward Carson
Original Assignee
Fibre Techniques Limited
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
Application filed by Fibre Techniques Limited filed Critical Fibre Techniques Limited
Priority to JP91509206A priority Critical patent/JPH05508897A/en
Publication of WO1991019081A1 publication Critical patent/WO1991019081A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/10—Plastic foam

Definitions

  • This invention concerns catalytic converters principally for motor vehicles.
  • Catalytic converters are used for treatment of exhaust gases from motor vehicle engines to render them substantially harmless before emission to atmosphere. Treatment is by passing the exhaust gases through a chamber enclosing a porous ceramic block whose pores are coated with a suitable catalyst.
  • the ceramic block is contained in a chamber formed from two half shells welded together at their edges, the chamber having an inlet and an outlet.
  • the block is wrapped in fibrous material in order to insulate it from colder temperatures outside the converter, to provide sound proofing and to cushion the ceramic block against expansion and contraction of the chamber.
  • a commonly use fibrous material is that sold under the trade name SAFFIL which is 95% alumina and provided as a low density mat.
  • SAFFIL 95% alumina
  • Proposals have been made in U.K. Patent applications Nos. 2171180A and 2205929A for methods of wrapping ceramic blocks to facilitate fitting of same in catalytic converters. These methods have proved to be acceptable in most areas but the presence of several layers of plastics material around and between layers of the fibrous material is seen as a possible source of contamination of the fibrous material that could impair its effectiveness.
  • An aspect of this invention is to provide a way of installing fibrous material about catalytic converters so that the above-mentioned problems are overcome or at least mitigated.
  • a method of protecting and insulating a catalytic converter block comprising wrapping said block in at least one layer of a mat of fibrous material and wrapping the at least one layer of fibrous material with plastics material under tension.
  • a sheet of plastics material overlaps itself or ends thereof overlap an underlying sheet of plastics material.
  • the sheet of plastics material overlaps itself to a relatively minor extent, whereby overlapping ends can be adhered together after a desired tension for the sheet has been reached.
  • tension will be applied to the plastics sheet by applying a force to one end of the sheet whilst the other end is held or by applying force simultaneously to both ends of the sheet in opposite directions.
  • One preferred proposal of the invention may be to form a loop in one or both ends of the plastics sheet in which a bar, rod or the like can be inserted. Force is then applied to the ends of the bar, rod or the like in the desired direction.
  • the loop may be formed by folding over the end of the sheet and adhering it to itself such as by means of double-sided adhesive tape or some other adhesive such as a moisture cured adhesive, say of the cyanoacrylate type, or a U.V. curable adhesive, which may be spray or drop applied. It may even be possible to form the loop by hot welding.
  • plastics sheet may be adhered to itself using any suitable means, such as for example using double-sided adhesive tape or some other adhesive, such as a moisture cured adhesive, say of the cyanocrylate type, or a U.V. curable adhesive, which may be of spray or drop applied. Hot welding may be another possibility for adhering the overlapped ends of the plastics sheet together.
  • a relatively narrow strip of plastics material is positioned on the fibrous material and the plastics sheet wrapped around the fibrous material under tension so that opposite ends thereof overlap the narrow strip, said opposite ends then being adhered to the relatively narrow strip by any suitable means.
  • the ends of the sheet of plastics material do not overlap each other.
  • the preferred material used in the invention should have sufficient strength to withstand the required tensioning as should any adhesive used.
  • Particularly suitable plastics material for use in the present invention will be those based on carbon and hydrogen only and possibly also on oxygen. Polypropylene and polyesters have been found to be especially suitable as the plastics material for use in the invention.
  • the fibrous material will preferably be overlapped at its ends, preferably over a flatter surface of the catalytic converter block. (Most catalytic converter blocks have an oval cross section) . It may be advantageous to provide a separate pad to give extra thickness of fibrous material on the opposite flatter surface of the block. Such an arrangement means that the thickness of fibrous material is less at the more curved ends of the block so that there is less likelihood of fibrous material being trapped between half shell edges of a catalytic converter as they are pressed together for welding.
  • the invention also comprehends a catalytic converter block wrapped in accordance with the invention as well as a catalytic converter comprising a wrapped catalytic converter block.
  • Figure 1 shows schematically a first stage for wrapping a catalytic converter block with fibrous material
  • Figure 2 shows schematically a second stage for wrapping a catalytic converter block with fibrous material
  • Figure 3 shows schematically a final stage for wrapping a catalytic converter block
  • Figure 4 shows schematically an alternative method of wrapping a catalytic converter block.
  • an oval section catalytic converter block 10 of the type usually housed in metal half shells welded together is firstly wrapped with a layer 12 of fibrous material, typically SAFFIL, so that it overlaps on a flatter section of the block. Then, a sheet 14 of polypropylene is wrapped around the fibrous material under tension and overlapped ends thereof adhered together to give a final product as shown in Figure 3.
  • a layer 12 of fibrous material typically SAFFIL
  • the method of wrapping the plastics sheet involves the following steps.
  • the width of the film is equal to the length of the converter block and the length is approximately one and a quarter times the outer circumference of the cover.
  • Each end of the sheet is folded over to form a loop 16 and adhered to the main part of the sheet, for example, by double-sided adhesive tape, moisture curable adhesive, U.V. curable adhesive or by welding.
  • both ends of the sheet 14 are looped but, for example in an automated system, the plastics sheet will be fed off a roller so no loop will be required at that end of the sheet, for reasons which will become apparent below.
  • a strip 18 of double-sided adhesive tape is fixed across the plastics sheet 14 just prior to the left hand loop, as seen in the drawing, backing strip being left on.
  • the spare backing strip is folded back onto the tape but projecting slightly.
  • a flat metal bar 20 is inserted into each loop 16 and, after wrapping the block with the required fibrous material firmly but not necessarily with great tension, the plastics sheet is wrapped around the fibrous material and overlapped at its ends.
  • the ends of the bars 20 are engaged by hydraulic cylinder (not shown) and tension applied to force the bars away from each other in order to compress the fibrous material.
  • the loops 16 are formed by turning the free ends of the plastics sheet 14 over to be on the opposite faces of the sheet 14 to those between which an adhesive bond is to be formed.
  • the backing strip is removed from the tape 18 and radial pressure applied to adhere the plastics sheet to itself in an overlapping relationship. Obviously, when the plastics sheet is supplied off a roll, ⁇ that will act as an anchor and only force need be applied to the other end of the sheet to achieve the required tension.
  • the bars 20 are then removed and excess plastics sheet and fibrous material trimmed away.
  • a curable adhesive may be applied in place of the double-sided adhesive tape at 18.
  • Such an adhesive can be moisture curable, say of the cyanoacrylate type, or U.V. curable.
  • the loops 16 may be formed without the need for adhesive or, indeed, the ends of the plastics sheet may be gripped in some way in order to apply tension thereto.
  • FIG. 4 of the accompanying drawings shows an alternative method of wrapping a converter block 10
  • the block 10 is wrapped with a layer 12 of fibrous material, as before, under tension and with its ends overlapped.
  • a relatively narrow strip 30 of plastics material is laid over the overlapped region of the fibrous material 12.
  • a sheet 32 of plastics material is wrapped around the block 10 and at each end passed over rollers 34.
  • the rollers 34 are arranged to be movable towards each other to apply tension to the sheet 32 along with tension applied to each end of the sheet 32.
  • Adhesive such as of the moisture cured type is applied to the strip 30 at 36 and the tensed sheet 32 brought down onto the adhesive to fix it in place under tension to complete the wrapping of the block 10.
  • the surplus ends of sheet 32 are cut off.

Abstract

A catalytic converter block (10) is firstly wrapped with a layer of fibrous material (12) and then by a sheet of plastics material (14) under tension. Overlapping ends of the sheet of plastics materialare adhered together.

Description

Title: Catalytic Converters
DESCRIPTION
This invention concerns catalytic converters principally for motor vehicles. Catalytic converters are used for treatment of exhaust gases from motor vehicle engines to render them substantially harmless before emission to atmosphere. Treatment is by passing the exhaust gases through a chamber enclosing a porous ceramic block whose pores are coated with a suitable catalyst.
The ceramic block is contained in a chamber formed from two half shells welded together at their edges, the chamber having an inlet and an outlet. The block is wrapped in fibrous material in order to insulate it from colder temperatures outside the converter, to provide sound proofing and to cushion the ceramic block against expansion and contraction of the chamber.
A commonly use fibrous material is that sold under the trade name SAFFIL which is 95% alumina and provided as a low density mat. Proposals have been made in U.K. Patent applications Nos. 2171180A and 2205929A for methods of wrapping ceramic blocks to facilitate fitting of same in catalytic converters. These methods have proved to be acceptable in most areas but the presence of several layers of plastics material around and between layers of the fibrous material is seen as a possible source of contamination of the fibrous material that could impair its effectiveness.
An aspect of this invention is to provide a way of installing fibrous material about catalytic converters so that the above-mentioned problems are overcome or at least mitigated.
According to this invention there is provided a method of protecting and insulating a catalytic converter block comprising wrapping said block in at least one layer of a mat of fibrous material and wrapping the at least one layer of fibrous material with plastics material under tension.
Preferably a sheet of plastics material overlaps itself or ends thereof overlap an underlying sheet of plastics material. In one preferred embodiment of the invention the sheet of plastics material overlaps itself to a relatively minor extent, whereby overlapping ends can be adhered together after a desired tension for the sheet has been reached. In a preferred embodiment tension will be applied to the plastics sheet by applying a force to one end of the sheet whilst the other end is held or by applying force simultaneously to both ends of the sheet in opposite directions. One preferred proposal of the invention may be to form a loop in one or both ends of the plastics sheet in which a bar, rod or the like can be inserted. Force is then applied to the ends of the bar, rod or the like in the desired direction. The loop may be formed by folding over the end of the sheet and adhering it to itself such as by means of double-sided adhesive tape or some other adhesive such as a moisture cured adhesive, say of the cyanoacrylate type, or a U.V. curable adhesive, which may be spray or drop applied. It may even be possible to form the loop by hot welding.
Once the plastics sheet has been tensioned it may be adhered to itself using any suitable means, such as for example using double-sided adhesive tape or some other adhesive, such as a moisture cured adhesive, say of the cyanocrylate type, or a U.V. curable adhesive, which may be of spray or drop applied. Hot welding may be another possibility for adhering the overlapped ends of the plastics sheet together.
When the plastics sheet is being supplied from a roll, it will be appreciated that only a tensioning loop need be formed in the free end of the plastics sheet, its other end being effectively anchored by being joined to the roll. It is envisaged that may well be the case for automated implementation of the method of the invention .
In another preferred embodiment of the invention, a relatively narrow strip of plastics material is positioned on the fibrous material and the plastics sheet wrapped around the fibrous material under tension so that opposite ends thereof overlap the narrow strip, said opposite ends then being adhered to the relatively narrow strip by any suitable means. In this embodiment, the ends of the sheet of plastics material do not overlap each other.
The preferred material used in the invention should have sufficient strength to withstand the required tensioning as should any adhesive used. Particularly suitable plastics material for use in the present invention will be those based on carbon and hydrogen only and possibly also on oxygen. Polypropylene and polyesters have been found to be especially suitable as the plastics material for use in the invention. The fibrous material will preferably be overlapped at its ends, preferably over a flatter surface of the catalytic converter block. (Most catalytic converter blocks have an oval cross section) . It may be advantageous to provide a separate pad to give extra thickness of fibrous material on the opposite flatter surface of the block. Such an arrangement means that the thickness of fibrous material is less at the more curved ends of the block so that there is less likelihood of fibrous material being trapped between half shell edges of a catalytic converter as they are pressed together for welding.
The invention also comprehends a catalytic converter block wrapped in accordance with the invention as well as a catalytic converter comprising a wrapped catalytic converter block. The invention will now be further described, by way of example only, with reference to the accompanying drawings, in which:-
Figure 1 shows schematically a first stage for wrapping a catalytic converter block with fibrous material;
Figure 2 shows schematically a second stage for wrapping a catalytic converter block with fibrous material;
Figure 3 shows schematically a final stage for wrapping a catalytic converter block; and
Figure 4 shows schematically an alternative method of wrapping a catalytic converter block.
Referring to the accompanying drawings, an oval section catalytic converter block 10 of the type usually housed in metal half shells welded together is firstly wrapped with a layer 12 of fibrous material, typically SAFFIL, so that it overlaps on a flatter section of the block. Then, a sheet 14 of polypropylene is wrapped around the fibrous material under tension and overlapped ends thereof adhered together to give a final product as shown in Figure 3.
The method of wrapping the plastics sheet involves the following steps. The width of the film is equal to the length of the converter block and the length is approximately one and a quarter times the outer circumference of the cover. Each end of the sheet is folded over to form a loop 16 and adhered to the main part of the sheet, for example, by double-sided adhesive tape, moisture curable adhesive, U.V. curable adhesive or by welding. As shown both ends of the sheet 14 are looped but, for example in an automated system, the plastics sheet will be fed off a roller so no loop will be required at that end of the sheet, for reasons which will become apparent below.
A strip 18 of double-sided adhesive tape is fixed across the plastics sheet 14 just prior to the left hand loop, as seen in the drawing, backing strip being left on. The spare backing strip is folded back onto the tape but projecting slightly.
Then, a flat metal bar 20 is inserted into each loop 16 and, after wrapping the block with the required fibrous material firmly but not necessarily with great tension, the plastics sheet is wrapped around the fibrous material and overlapped at its ends. The ends of the bars 20 are engaged by hydraulic cylinder (not shown) and tension applied to force the bars away from each other in order to compress the fibrous material. It should be noted that the loops 16 are formed by turning the free ends of the plastics sheet 14 over to be on the opposite faces of the sheet 14 to those between which an adhesive bond is to be formed. Once the desired tension has been reached, the backing strip is removed from the tape 18 and radial pressure applied to adhere the plastics sheet to itself in an overlapping relationship. Obviously, when the plastics sheet is supplied off a roll, ■ that will act as an anchor and only force need be applied to the other end of the sheet to achieve the required tension.
The bars 20 are then removed and excess plastics sheet and fibrous material trimmed away.
Alternatively, a curable adhesive may be applied in place of the double-sided adhesive tape at 18. Such an adhesive can be moisture curable, say of the cyanoacrylate type, or U.V. curable. Also, the loops 16 may be formed without the need for adhesive or, indeed, the ends of the plastics sheet may be gripped in some way in order to apply tension thereto.
It will be appreciated that although the method steps have been described in a particular order, that order may be altered to suit particular circumstances, such as if the method is to be carried out automatically on suitable machinery. Furthermore, it will be appreciated that, whilst the invention has been described particularly in respect of wrapping catalytic converter blocks, the method of the invention may be suitable for other wrapping applications.
Turning to Figure 4 of the accompanying drawings, which shows an alternative method of wrapping a converter block 10, the block 10 is wrapped with a layer 12 of fibrous material, as before, under tension and with its ends overlapped. A relatively narrow strip 30 of plastics material is laid over the overlapped region of the fibrous material 12. Then a sheet 32 of plastics material is wrapped around the block 10 and at each end passed over rollers 34. The rollers 34 are arranged to be movable towards each other to apply tension to the sheet 32 along with tension applied to each end of the sheet 32. Adhesive, such as of the moisture cured type is applied to the strip 30 at 36 and the tensed sheet 32 brought down onto the adhesive to fix it in place under tension to complete the wrapping of the block 10. Finally, the surplus ends of sheet 32 are cut off.

Claims

1. A method of protecting and insulating a catalytic converter block comprising wrapping said block in at least one layer of a mat of fibrous material and wrapping the at least one layer of fibrous material with plastics material under tension.
2. A method as claimed in claim 1, wherein a sheet of plastics material overlaps itself.
3. A method as claimed in claim 2, wherein the sheet of plastics material is overlapped on itself to a relatively minor extent under tension and the overlapping ends are adhered together.
4. A method as claimed in claim 2 or 3, wherein a force is applied to one end of the plastics sheet whilst the other end is held.
5. A method as claimed in claim 2 or 3, wherein force is applied to both ends of the sheet.
6. A method as claimed in any one of claims 2 to 5, wherein one or both of the ends of the plastics sheet is or are formed into a loop into which a bar, rod or the like can be inserted and to which a force can be applied.
7. A method as claimed in claim 6, wherein a loop is formed by folding over an end of the sheet of plastics material and adhering it to itself.
8. A method as claimed in claim 1, wherein ends of a sheet of plastics material overlap an underlying sheet of plastics material.
9. A method as claimed in claim 8, wherein a relatively narrow strip of plastics material is positioned on the fibrous material and the plastics sheet wrapped around the fibrous material under tension so that the ends of the plastics sheet overlap the narrow strip and said ends are adhered to the narrow strip.
10. A method as claimed in any one of claims 1 to 9, wherein the plastics material is based on carbon and hydrogen only.
11. A method as claimed in claim 10, wherein the plastics material is polypropylene.
12. A method as claimed in any one of claims 1 to 9, wherein the plastics material is based on carbon, hydrogen and oxygen only.
13. A method as claimed in claim 12, wherein the plastics material is a polyester.
14. A method as claimed in any one of claims 1 to 13, wherein the fibrous material is overlapped on a flatter surface of the catalytic converter block.
15. A method of protecting and insulating a catalytic converter block substantially as hereinbefore described with reference to and as illustrated in Figures 1 to 3 or Figure 4 of the accompanying drawings.
16. A catalytic converter block wrapped by a method as claimed in any one of claims 1 to 15.
PCT/GB1991/000760 1990-05-26 1991-05-14 Catalytic converters WO1991019081A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP91509206A JPH05508897A (en) 1990-05-26 1991-05-14 contact converter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9011849.8 1990-05-26
GB909011849A GB9011849D0 (en) 1990-05-26 1990-05-26 Catalytic converters

Publications (1)

Publication Number Publication Date
WO1991019081A1 true WO1991019081A1 (en) 1991-12-12

Family

ID=10676639

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/000760 WO1991019081A1 (en) 1990-05-26 1991-05-14 Catalytic converters

Country Status (6)

Country Link
EP (1) EP0531352A1 (en)
JP (1) JPH05508897A (en)
AU (1) AU7893091A (en)
GB (1) GB9011849D0 (en)
WO (1) WO1991019081A1 (en)
ZA (1) ZA913991B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882608A (en) * 1996-06-18 1999-03-16 Minnesota Mining And Manufacturing Company Hybrid mounting system for pollution control devices
WO2000012878A1 (en) * 1998-08-26 2000-03-09 Volkswagen Aktiengesellschaft Method for the production of a catalytic converter housing using a winding-tensioning technique
EP1207281A3 (en) * 2000-11-17 2004-01-21 J. Eberspächer GmbH & Co. KG Method for fixing a carrier mat on a monolith
US6726884B1 (en) 1996-06-18 2004-04-27 3M Innovative Properties Company Free-standing internally insulating liner
US6923942B1 (en) 1997-05-09 2005-08-02 3M Innovative Properties Company Compressible preform insulating liner
US7896943B2 (en) 2008-02-07 2011-03-01 Bgf Industries, Inc. Frustum-shaped insulation for a pollution control device
US8652599B2 (en) 2003-01-22 2014-02-18 3M Innovative Properties Company Molded three-dimensional insulator
EP2810771A1 (en) * 2013-06-03 2014-12-10 Ibiden Co., Ltd. Holding seal material, manufacturing method for holding seal material, exhaust gas purification apparatus and manufacturing method for exhaust gas purification apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3318822B2 (en) * 1996-05-29 2002-08-26 イビデン株式会社 Mounting method of heat-insulating sealing material for converter for purifying exhaust gas and mounting jig

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2200471A1 (en) * 1972-09-27 1974-04-19 Trieb Peter
FR2213413A1 (en) * 1973-01-06 1974-08-02 British Leyland Motor Corp
US4048363A (en) * 1976-06-16 1977-09-13 Minnesota Mining And Manufacturing Company Offset laminated intumescent mounting mat
EP0074220A2 (en) * 1981-08-26 1983-03-16 Lancaster Glass Fibre Limited Improvements in or relating to inserts for silencers
GB2205929A (en) * 1987-06-18 1988-12-21 Fibre Tech Ltd Fibrous material packaging

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2200471A1 (en) * 1972-09-27 1974-04-19 Trieb Peter
FR2213413A1 (en) * 1973-01-06 1974-08-02 British Leyland Motor Corp
US4048363A (en) * 1976-06-16 1977-09-13 Minnesota Mining And Manufacturing Company Offset laminated intumescent mounting mat
EP0074220A2 (en) * 1981-08-26 1983-03-16 Lancaster Glass Fibre Limited Improvements in or relating to inserts for silencers
GB2205929A (en) * 1987-06-18 1988-12-21 Fibre Tech Ltd Fibrous material packaging

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6726884B1 (en) 1996-06-18 2004-04-27 3M Innovative Properties Company Free-standing internally insulating liner
US5882608A (en) * 1996-06-18 1999-03-16 Minnesota Mining And Manufacturing Company Hybrid mounting system for pollution control devices
US6613294B2 (en) 1996-06-18 2003-09-02 3M Innovative Properties Company Hybrid mounting system for pollution control devices
US7501099B2 (en) 1996-06-18 2009-03-10 3M Innovative Properties Company Hybrid mounting system for pollution control devices
US7758795B2 (en) 1997-05-09 2010-07-20 3M Innovative Properties Company Method of making a polluction control device and a self-supporting insulating end cone
US8182751B2 (en) 1997-05-09 2012-05-22 3M Innovative Properties Company Self-supporting insulating end cone liner and pollution control device
US6923942B1 (en) 1997-05-09 2005-08-02 3M Innovative Properties Company Compressible preform insulating liner
US8741200B2 (en) 1997-05-09 2014-06-03 3M Innovative Properties Company Method of making self-supporting insulating end cone liners and pollution control devices
US8632727B2 (en) 1997-05-09 2014-01-21 3M Innovative Properties Company Self-supporting insulating end cone liner and pollution control device
WO2000012878A1 (en) * 1998-08-26 2000-03-09 Volkswagen Aktiengesellschaft Method for the production of a catalytic converter housing using a winding-tensioning technique
US6902710B2 (en) 1998-08-26 2005-06-07 Volkswagen Ag Method for the production of a catalytic converter housing using a winding-tensioning technique
EP1207281A3 (en) * 2000-11-17 2004-01-21 J. Eberspächer GmbH & Co. KG Method for fixing a carrier mat on a monolith
US8652599B2 (en) 2003-01-22 2014-02-18 3M Innovative Properties Company Molded three-dimensional insulator
US9995424B2 (en) 2003-01-22 2018-06-12 3M Innovative Properties Company Molded three-dimensional end cone insulator
US10844994B2 (en) 2003-01-22 2020-11-24 3M Innovative Properties Company Molded three-dimensional end cone insulator
US7896943B2 (en) 2008-02-07 2011-03-01 Bgf Industries, Inc. Frustum-shaped insulation for a pollution control device
EP2810771A1 (en) * 2013-06-03 2014-12-10 Ibiden Co., Ltd. Holding seal material, manufacturing method for holding seal material, exhaust gas purification apparatus and manufacturing method for exhaust gas purification apparatus
US9486739B2 (en) 2013-06-03 2016-11-08 Ibiden Co., Ltd. Holding seal material, manufacturing method for holding seal material, exhaust gas purification apparatus and manufacturing method for exhaust gas purification apparatus

Also Published As

Publication number Publication date
GB9011849D0 (en) 1990-07-18
EP0531352A1 (en) 1993-03-17
JPH05508897A (en) 1993-12-09
AU7893091A (en) 1991-12-31
ZA913991B (en) 1992-05-27

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