| (19) |
 |
|
(11) |
EP 0 185 479 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
07.10.1987 Bulletin 1987/41 |
| (43) |
Date of publication A2: |
|
25.06.1986 Bulletin 1986/26 |
| (22) |
Date of filing: 28.11.1985 |
|
|
| (84) |
Designated Contracting States: |
|
BE CH DE FR GB LI NL SE |
| (30) |
Priority: |
13.12.1984 US 681502
|
| (71) |
Applicant: NORDSON CORPORATION |
|
() |
|
|
| |
|
| (54) |
Powder delivery system |
(57) A method and apparatus for pumping air entrained solid particulate powder material
from a hopper to a dispenser so as to maintain a steady rate of flow of powder to
the dispenser. The apparatus comprises a primary fluidized bed hopper from which powder
is pumped to an auxiliary and much smaller capacity auxiliary fluidized bed hopper.
The powder is then supplied from the auxiliary hopper to the dispenser.