Patent EP0200798A1 successfully refreshed from Google Patents.
EP0200798A1
Expired / Lapsed
EP
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Method for making a curved, corrugated article and apparatus therefor
Assignee: Denso Corp
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Filing: 1985-05-07
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Granted: —
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Expires: 2005-05-07
Abstract
Abstract A method and apparatus for making axial-flow filter wherein a curved corrugation is made from a flat sheet of filter material in the first step, and thereafter the curved corrugation is made circular to obtain the final product intended. In the first step, the flat sheet (2) of filter material is attached to a mold (3) so that it is slanted up from one end thereof, thereafter a set of fixing blades (4) is moved down to the mold to fold the flat sheet of filter material consecutively into a curved corrugation. In the second step the curved corrugation thus produced is made circular by using a contouring belt which embraces the outer circumference of the curved corrugation.
Inventors
- 👤 Yuuji Ito
- 👤 Tadahiko Shibata
- 👤 Masahiko Sakai
- 👤 Yukio Ota
- 👤 Naohiko Kondo
- 👤 Harukazu Matuyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:32
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D29/072; B01D46/0001; B01D46/10; B31; B31D; B31D5/00; B31D5/0082; B31F; B31F1/00; B31F1/0003; B31F1/0006; B31F1/0009; B31F1/08; B31F1/20; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B01D2201/00; B01D2201/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A method for making a curved corrugation from a flat sheet of material comprising the steps of: preparing said flat sheet of material, preparing a mold having a curved wavy surface at one side thereof, fixing an end of said flat sheet to a curved end of said mold so that said flat sheet is curved and inclined-with respect to said curved wavy surface of said mold, preparing a,set of fixing blades each of which mates with each of the bottom edges of said curved wavy surface when moved to said wavy surface, and moving said set of blades toward said wavy surface, folding said fixed flat sheet continuously along said curved wavy surface to make said curved corrugation in such a manner that a blade closest to said fixed end of said flat sheet is moved first and thereafter the successive blades are moved consecutively.
Claim 2
Independent Claim
146 words
A method for making a curved corrugation from a flat sheet of material comprising the steps of: preparing said flat sheet of material, preparing a mold having a curved wavy surface at one side thereof, fixing an end of said flat sheet to a curved end of said mold so that said flat sheet is curved and inclined-with respect to said curved wavy surface of said mold, preparing a,set of fixing blades each of which mates with each of the bottom edges of said curved wavy surface when moved to said wavy surface, and moving said set of blades toward said wavy surface, folding said fixed flat sheet continuously along said curved wavy surface to make said curved corrugation in such a manner that a blade closest to said fixed end of said flat sheet is moved first and thereafter the successive blades are moved consecutively.
Claim 3
Independent Claim
53 words
A method for making a curved corrugation from a flat sheet of material as claimed in claim-1, further comprising the step of: pressing the curved top edges of said curved corrugation by a heater after said curved corrugation is made between said fixing blades and said wavy surface for rigidifying said curved corrugation.
Claim 4
Dependent Claim
45 words
A method for making a curved corrugation from a flat sheet of material as. claimed in claim 1 or 2, further comprising the step of: heating said mold for fixing the shape of said curved corrugation made between said fixing blades and said wavy surface.
Claim 5
Dependent Claim
50 words
A method for making a curved corrugation from a flat sheet of material as claimed in claim 3, wherein: said flat sheet of material is fan-shaped with two curved edges and two-tapered side edges, and made of filter material, one of said two curved edges being fixed to said mold.
Claim 6
Independent Claim
205 words
A method for making an axial-flow filter comprising the steps of: preparing a flat sheet of filter material, preparing a mold having a curved wavy surface at one side thereof, fixing an end of said flat sheet to a curved end of said mold so that said flat sheet is curved and inclined with respect to said curved wavy surface of said mold, preparing a set of fixing blades each of which mates with each of the bottom edges of said curved wavy surface when moved to said wavy surface, moving said set of blades toward said wavy surface, folding said fixed flat sheet continuously along said curved wavy surface to make a curved corrugation in such a manner that a blade closest to said fixed end of said flat sheet is moved first and thereafter the successive blades are moved consecutively, positioning a center rod close to an inner curved end of said curved corrugation, positioning a contouring belt over an outer curved end of said curved corrugation, and moving said contouring belt toward said center rod in such a manner that said belt makes a circle around said center rod, said curved corrugation being made circular between said belt and said center rod.
Claim 7
Independent Claim
205 words
A method for making an axial-flow filter comprising the steps of: preparing a flat sheet of filter material, preparing a mold having a curved wavy surface at one side thereof, fixing an end of said flat sheet to a curved end of said mold so that said flat sheet is curved and inclined with respect to said curved wavy surface of said mold, preparing a set of fixing blades each of which mates with each of the bottom edges of said curved wavy surface when moved to said wavy surface, moving said set of blades toward said wavy surface, folding said fixed flat sheet continuously along said curved wavy surface to make a curved corrugation in such a manner that a blade closest to said fixed end of said flat sheet is moved first and thereafter the successive blades are moved consecutively, positioning a center rod close to an inner curved end of said curved corrugation, positioning a contouring belt over an outer curved end of said curved corrugation, and moving said contouring belt toward said center rod in such a manner that said belt makes a circle around said center rod, said curved corrugation being made circular between said belt and said center rod.
Claim 8
Dependent Claim
48 words
A method for making an axial-flow filter as claimed in'claim 5 further comprising the step of: locating a reshaper having circular teeth which mate with valleys of said circular-made curved corrugation at a disconnected portion of said circular-made curved corrugation for reshaping the ends of said circular-made corrugation.
Claim 9
Independent Claim
150 words
An apparatus for making a curved corrugation from a flat sheet of material comprising: a mold having a wavy curved surface on one side thereof which corresponds to said curved corrugation in shape, said mold having a sloped and curved inner end, a means for fixing an end of said flat sheet with said sloped and curved inner end in such a manner that said flat sheet is curved along said inner end and slanted up continuously, a set of fixing blades located apart from said curved and slanted flat sheet, and a means for moving a fixing blade closest to said end fixing means and moving remaining fixing blades consecutively from the one closer to said end fixing means to the one farthest from said end fixing means toward said wavy curved surface, so that said curved corrugation is made between said wavy curved surface and said fixing blades.
Claim 10
Independent Claim
150 words
An apparatus for making a curved corrugation from a flat sheet of material comprising: a mold having a wavy curved surface on one side thereof which corresponds to said curved corrugation in shape, said mold having a sloped and curved inner end, a means for fixing an end of said flat sheet with said sloped and curved inner end in such a manner that said flat sheet is curved along said inner end and slanted up continuously, a set of fixing blades located apart from said curved and slanted flat sheet, and a means for moving a fixing blade closest to said end fixing means and moving remaining fixing blades consecutively from the one closer to said end fixing means to the one farthest from said end fixing means toward said wavy curved surface, so that said curved corrugation is made between said wavy curved surface and said fixing blades.
Claim 11
Dependent Claim
92 words
An apparatus for making a curved corrugation from a flat sheet of material as claimed in claim 7, wherein: said set of fixing blades is so located as that each blades are consecutively raised from the one closest to said end fixing means to the one farthest from said end fixing means, and said set of fixing blades is moved all together toward said wavy curved surface so that each of said fixing blades is consecutively pressed down to each of a bottom edge of a valley of said wavy curved surface.
Claim 12
Dependent Claim
63 words
An apparatus for making a curved corrugation from a flat sheet of material as claimed in claim 8 further comprising: a set of heaters located between said fixing blades respectively for pressing top edges of said curved corrugation formed between said wavy curved surface and said fixing blades, and another set of heaters placed in association with said mold for heating the same.
Claim 13
Independent Claim
224 words
An apparatus for making an axial-flow filter from a flat sheet of material comprising: a mold having a wavy curved surface on one side thereof which corresponds to a curved corrugation from which said axial-flow filter is made, said mold having a sloped and curved inner end, a means for fixing an end of said flat sheet with said sloped and curved inner end in such a manner that said flat sheet is curved along said inner end and slanted up continuously, a set of fixing blades located apart from said curved and slanted flat sheet, a means for moving a fixing blade closest to said end fixing means and moving remaining fixing blades consecutively from the one closer to said end fixing means to the one farthest from said end fixing means toward said wavy curved surface, so that said curved corrugation is made between said wavy curved surface and said fixing blades, a center rod located close to an inner end of said curved corrugation, a contouring belt located around an outer end of said curved corrugation for embracing the same, a means for grasping each ends of said contouring belt, and a means for moving said grasping means along a predetermined path so that said contouring belt makes a circle around said center rod with said curved corrugation made circular therebetween.
Claim 14
Independent Claim
224 words
An apparatus for making an axial-flow filter from a flat sheet of material comprising: a mold having a wavy curved surface on one side thereof which corresponds to a curved corrugation from which said axial-flow filter is made, said mold having a sloped and curved inner end, a means for fixing an end of said flat sheet with said sloped and curved inner end in such a manner that said flat sheet is curved along said inner end and slanted up continuously, a set of fixing blades located apart from said curved and slanted flat sheet, a means for moving a fixing blade closest to said end fixing means and moving remaining fixing blades consecutively from the one closer to said end fixing means to the one farthest from said end fixing means toward said wavy curved surface, so that said curved corrugation is made between said wavy curved surface and said fixing blades, a center rod located close to an inner end of said curved corrugation, a contouring belt located around an outer end of said curved corrugation for embracing the same, a means for grasping each ends of said contouring belt, and a means for moving said grasping means along a predetermined path so that said contouring belt makes a circle around said center rod with said curved corrugation made circular therebetween.
Claim 15
Dependent Claim
53 words
An apparatus for making an axial-flow filter from a flat sheet of material as claimed in claim 10 further comprising: a supporting belt located inside of said contouring belt to mate with a valley of said curved corrugation for bending said curved corrugation together with said contouring belt to a circular axial-flow filter.
Claim 16
Dependent Claim
64 words
An apparatus for making an axial-flow filter from a flat sheet of material as claimed in claim 10 or 11 further comprising: a reshaper having semi-circular teeth therein for receiving said curved corrugation made circular, mating respective valleys of said curved corrugation made circular and said teeth in order that the ends of said curved corrugation made circular are reshaped by said semi-circular teeth.
References Cited (Backward Citations)
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