Dosing and weighing device and method for determining the weight of a product in a dosing and weighing device
AssigneeBuhler AG
InventorsPeter Schai, René Haid, Andreas Kleiner, Heinz Brand
Life of this patent
Estimating the term…
Abstract
A dosing and weighing device (1) comprising a housing (2) having an inlet opening (3) and an outlet opening (4), and a weighing surface (5), which is operatively connected to at least one weight sensor (7), a mechanism (9) for detecting a pressure difference between a pressure in the housing upstream and a pressure in the housing downstream of the weighing surface (5). Via a control unit (8), the detected pressure difference is used to correct the weight detected by the weight sensor (7).
Claims10
A dosing and weighing device for bulk materials comprising:
- a housing with an inlet opening and an outlet opening for a product to be weighed and dosed;
- a weighing surface which is movable between a weighing position and a dosing position by an operating device and is operatively connected to at least one weight sensor, wherein
- in the weighing position a product flow between said inlet opening and said outlet opening is prevented and thus a weight of the product loaded on the weighing surface can be determined by the at least one weight sensor, and
- in the dosing position, the product flow between said inlet opening and said outlet opening is at least partially enabled, and
- a control unit which is designed at least for controlling the operating device and is connected to the at least one weight sensor,
- wherein means for determining a gas pressure difference between a pressure in the housing upstream on a first side of the weighing surface of the at least one weight sensor, in a product flow direction, and a pressure in the housing downstream on a second side of the weighing surface of the at least one weight sensor, in the product flow direction, and by the control unit the determined pressure difference is used to correct the weight determined by the weight sensor, and
- there are no ventilation openings in the housing.
A dosing and weighing device for bulk materials comprising:
- a housing with an inlet opening and an outlet opening for a product to be weighed and dosed;
- a weighing surface being located within the housing between said inlet opening and said outlet opening, the weighing surface being movable between a weighing position and a dosing position by an operating device and is operatively connected to at least one weight sensor, wherein
- in the weighing position a product flow between said inlet opening and said outlet opening is prevented and thus a weight of the product loaded on the weighing surface can be determined by the at least one weight sensor, and
- in the dosing position, the product flow between said inlet opening and said outlet opening is at least partially enabled, and
- a control unit which is designed at least for controlling the operating device and is connected to the at least one weight sensor,
- wherein means for determining a gas pressure difference between a pressure in the housing upstream on a first side of the weighing surface of the at least one weight sensor, in a product flow direction, and a pressure in the housing downstream on an opposed second side of the weighing surface of the at least one weight sensor, in the product flow direction, and by the control unit the determined pressure difference is used to correct the weight determined by the weight sensor, and
- there are no ventilation openings in the housing.
Dependencies are inferred from the claim text.