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US 4,227,835 AGranted
Apparatus for the metered supply of powder to a powder processing unit
AssigneePlasmainvent AG
InventorHerbert Nussbaum
Life of this patent
Estimating the term…
Abstract
Powder is fed from a container into a continuous annular groove on a rotating metering plate. A doctor member ensures that the powder is correctly filled into the groove. The powder is then sucked out of the groove after the plate has rotated through a certain angle by a suction device which has a projection extending into the groove.
Claims13
Apparatus for the metered supply of powder to a powder unit, the apparatus comprising:
- a rotatable metering plate,
- a circularly extending powder groove in the metering plate,
- a powder container located above the groove,
- an outlet from the powder container to the groove, and
- a suction device, for removing powder from the metering plate, provided above the powder groove and extending into the powder groove, wherein
- a doctor member is positioned around the outlet of the powder container, is supported on both sides of the powder groove and its rear end, and has a chamfer in the lower surface in the region of the container outlet,
- the suction device being supported on both sides of the powder groove and comprising a suction bore and a crescent-shaped projection behind the suction bore, said projection extending into the powder groove as far as the bottom surface thereof, the concave end face of said crescent-shaped projection directed towards the suction bore, and
- resilient means for biasing the metering plate against the doctor member and the suction device.
5 more elements
Apparatus for the metered supply of powder to a powder processing unit, the apparatus comprising:
- a rotatable metering plate,
- a circularly extending powder groove in the metering plate,
- a first powder container located above the groove,
- a second powder container within the first powder container,
- an outlet from the second powder container,
- a deflector member spaced from said outlet to define a gap through which powder can flow from the second to the first powder container,
- an outlet from the first powder container to the groove,
- a doctor member positioned around the outlet of the powder container and being resiliently supported on both sides of the powder groove, and
- a suction device, for removing powder from the metering plate, provided above the powder groove, extending into the groove at a position angularly spaced from the doctor member around the circumference of the groove, and being resiliently supported on both sides of the powder groove.
6 more elements
Dependencies are inferred from the claim text.