Global Patent Index - EP 0808941 B1

EP 0808941 B1 2001-12-12 - Process to make a screening apparatus having slotted apertures and screening apparatus obtained by this process

Title (en)

Process to make a screening apparatus having slotted apertures and screening apparatus obtained by this process

Title (de)

Verfahren zur Herstellung einer Siebvorrichtung mit spaltförmigen Öffnungen sowie danach hergestellte Siebvorrichtung

Title (fr)

Procédé de fabrication d'un appareil de tamisage à ouvertures en forme de fentes et appareil de tamisage produit par ce procédé

Publication

EP 0808941 B1 (DE)

Application

EP 97104439 A

Priority

  • DE 19709582 A
  • DE 29609298 U

Abstract (en)

[origin: EP0808941A1] To produce a sieve structure, especially for sorting fibre suspensions for papermaking pulp, the reinforcements (1) are structured so that the rods are shaped with a profile where inserted into recesses (4) which gives a fixing action to them. The holding force is at least sufficient to hold them firmly in place so that the rod (2) positions are unchanged in relation to the reinforcement during subsequent production processes. Also claimed is a sieve where the rods are secured within the recesses (4) by a bonding agent (5), so that the rods (2) cannot be detached from the reinforcement (1). Preferably the sieve sorting slits (3) have a max. width of 3 mm or 0.4 mm, at their narrowest points. The recesses (4) into the reinforcements (1) have an inwards taper from the outer surface, followed by an expansion. The inserted rod (2) has a triangular cross section with rounded corners, to give a thickening at the inserted side into the recess. The rods (2) have a shape so that, when inserted, the sorting slit ranges from the narrowest point into an expanded flow cross section in the flow direction. The bonding agent (5) is solder, which solders at a temp. of ≤ 900 degrees C, or ≥ 900 degrees C to build up in a high vacuum. The bonding agent can also be an adhesive where, at the bonding point, the reaction temp. does not exceed 200 degrees C. Or the bonding is by welding. The reinforcement (1) is not yet in its final shape while the rods (2) are inserted into their recesses (4), to be shaped into the final structure with the inserted rods in place which also clamp s the rods (2) in position.

IPC 1-7 (main, further and additional classification)

D21D 5/16; B01D 29/44; B07B 1/18; B07B 1/46

IPC 8 full level (invention and additional information)

B07B 1/12 (2006.01); B07B 1/18 (2006.01); B07B 1/46 (2006.01); D21D 5/16 (2006.01)

CPC (invention and additional information)

B07B 1/4618 (2013.01); B07B 1/12 (2013.01); B07B 1/18 (2013.01); B07B 1/4681 (2013.01); D21D 5/16 (2013.01); Y10S 29/902 (2013.01); Y10T 29/49604 (2013.01); Y10T 29/49925 (2013.01)

Designated contracting state (EPC)

AT DE FI FR GB NL SE

EPO simple patent family

EP 0808941 A1 19971126; EP 0808941 B1 20011212; AT 210756 T 20011215; CA 2203325 A1 19971124; CA 2203325 C 20030610; US 6047834 A 20000411

INPADOC legal status


2004-10-01 [NLR2] NL: DECISION OF OPPOSITION

- Effective date: 20040329

2004-09-28 [REG SE ECNC] EUROPEAN PATENT HAS BEEN CANCELLED

2004-08-18 [27W] PATENT REVOKED

- Effective date: 20040329

2004-08-18 [GBPR] GB: PATENT REVOKED UNDER ART. 102 OF THE EP CONVENTION DESIGNATING THE UK AS CONTRACTING STATE

- Free text: 20040329

2004-03-25 [PGFP SE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2003-01-06 [NLR1] NL: OPPOSITION HAS BEEN FILED WITH THE EPO

- Opponent name: ADVANCED FIBER TECHNOLOGIES OY

2002-10-30 [26] OPPOSITION FILED

- Opponent name: ADVANCED FIBER TECHNOLOGIES OY

- Effective date: 20020830

2002-03-01 [ET] FR: TRANSLATION FILED

2002-01-24 [REF] CORRESPONDS TO:

- Document: DE 59705733 20020124

2002-01-02 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20011212

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-12-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AT DE FI FR GB NL SE

2001-12-12 [REF] CORRESPONDS TO:

- Document: AT 210756 T 20011215

2000-07-19 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000531

1998-07-22 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980526

1997-11-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT DE FI FR GB NL SE