Global Patent Index - EP 0988498 A1

EP 0988498 A1 2000-03-29 - APPARATUS AND METHOD FOR MOISTURE CONTROL OF PARTICULATE MATERIAL

Title (en)

APPARATUS AND METHOD FOR MOISTURE CONTROL OF PARTICULATE MATERIAL

Title (de)

VORRICHTUNG UND VERFAHREN ZUR FEUCHTIGKEITSSTEUERUNG VON TEILCHENFÖRMIGEM MATERIAL

Title (fr)

APPAREIL ET PROCEDE DE REGULATION DE L'HUMIDITIE D'UN MATERIAU PARTICULAIRE

Publication

EP 0988498 A1 (EN)

Application

EP 98926318 A

Priority

  • US 9811594 W
  • US 4949897 P

Abstract (en)

[origin: WO9857110A1] Moisture content of material such as thermoplastic pellets (80) in a hopper (30) is controlled by supplying dehumidified air from a dessicant bed (90) to the hopper (30) and returning air from the hopper (30) to the dessicant bed (90). A dew point sensor (10) in the return air path determines the moisture content of the material (80) in the hopper (30), and when the dew point drops to a pre-set level, a diverter (134) causes the return air flow to bypass the dessicant bed (90) and to be re-supplied to the hopper (30) without dehumidification. Two dessicant beds are provided, one of which is on-process while the dessicant in the other is regenerated.

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

F26B 19/00; F26B 3/00; F26B 21/06

IPC 8 full level (invention and additional information)

F26B 21/00 (2006.01); B29B 13/06 (2006.01); F26B 21/08 (2006.01); F26B 25/22 (2006.01)

CPC (invention and additional information)

F26B 21/083 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9857110 A1 19981217; CA 2294016 A1 19981217; EP 0988498 A1 20000329; EP 0988498 A4 20001115; JP 2002504034 A 20020205

INPADOC legal status


2002-07-03 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020103

2000-11-15 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20001005

2000-11-15 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-03-29 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991210

2000-03-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE