Method and device for determining the quantity of product present in a reservoir, a product reservoir and a device for processing electrical signals intended for such a determination device
First Claim
1. A method for determining a quantity of product present in a reservoir, comprising the steps of:
- establishing, through the product present in the reservoir, a first electrical field, and a second electrical field which is differentiated from the first electrical field by at least one characteristic, measuring the first electrical field and the second electrical field passing through the product, to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, and processing the first electrical signal to produce a first information signal able to take a plurality of values making a representation of the quantity of product then present in the reservoir, determining the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and processing the second electrical signal to produce, at an appropriate time, a second information signal representing at least one predetermined quantity outside said range.
2 Assignments
0 Petitions
Accused Products
Abstract
A device determines a quantity of product present in a reservoir, particularly a quantity of ink in the reservoir (112) of an image formation device, such as a printer (10). In a preferred embodiment, the devices includes means (120, 113, 123) of connecting the said product to a predetermined potential, means (121, 122) of establishing a first electrical field through the product, and adapted to establish a second electrical field different from the first electrical field, means (122), of measuring electrical fields in order to produce first and second electrical signals representing electrical fields, and means (100) of processing the first electrical signal in order to produce a signal representing the quantity of product, and adapted to process the second electrical signal in order to detect the interruption of the connection of the product to the predetermined potential, the said interruption corresponding to a predetermined quantity of product present in the reservoir (112).
281 Citations
60 Claims
-
1. A method for determining a quantity of product present in a reservoir, comprising the steps of:
-
establishing, through the product present in the reservoir, a first electrical field, and a second electrical field which is differentiated from the first electrical field by at least one characteristic, measuring the first electrical field and the second electrical field passing through the product, to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, and processing the first electrical signal to produce a first information signal able to take a plurality of values making a representation of the quantity of product then present in the reservoir, determining the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and processing the second electrical signal to produce, at an appropriate time, a second information signal representing at least one predetermined quantity outside said range. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 39, 56, 57, 58, 60)
-
-
2. A method for determining a quantity of product present in a reservoir, comprising the steps of:
-
connecting the product to a predetermined potential to make a connection of the product to the predetermined potential, establishing, through the product present in the reservoir, a first electrical field, and a second electrical field which is differentiated from the first electrical field by at least one characteristic, measuring the first electrical field and the second electrical field passing through the product, to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, processing the first electrical signal to produce a first information signal able to take a plurality of values making a representation of the quantity of product then present in the reservoir, determining the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and processing the second electrical signal to produce, at an appropriate time, an information signal corresponding to an interruption of the connection of the product to the predetermined potential, the interruption corresponding to a predetermined quantity outside said range. - View Dependent Claims (3)
-
-
24. A device for determining a quantity of product present in a reservoir, comprising:
-
means for establishing a first electrical field and a second electrical field through the product present in the reservoir, the second electrical field being differentiated from the first electrical field by at least one characteristic, means for measuring the first electrical field and the second electrical field to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, and means for processing the first electrical signal and the second electrical signals to produce a first information signal able to take a plurality of values making a representation of the quantity of product present in the reservoir, to determine the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and to produce, at an appropriate time, from the second electrical signal, a second information signal representing at least one predetermined quantity outside the range. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 59)
-
-
25. A device for determining a quantity of product present in a reservoir, comprising:
-
means for connecting the product to a predetermined potential to make a connection of the product and the predetermined potential, means for establishing a first electrical field and a second electrical field through the product present in the reservoir, the second electrical field being differentiated from the first electrical field by at least one characteristic, means for measuring the first electrical field and the second electrical field in order to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, and means for processing the first electrical signal and the second electrical signal to produce a first information signal able to take a plurality of values making a representation of the quantity of product present in the reservoir, to determine the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and to produce, at an appropriate time, from the second electrical signal, an information signal corresponding to an interruption of the connection of the product to the predetermined potential, said interruption corresponding to a predetermined quantity outside said range.
-
-
26. A device for processing electrical signals, said device cooperating with
means for establishing a first electrical field through a product present in a reservoir, and adapted to establish a second electrical field, through the product present in the reservoir, the second electrical field being differentiated from the first electrical field by at least one characteristic, means for measuring the first electrical field and the second electrical field to produce a first electrical signal and a second electrical signal respectively representing the first electrical field and the second electrical field, said device comprising: -
means for producing a first information signal able to take a plurality of values to make a representation of the quantity of product present in the reservoir, means for determining the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, means for producing, at the appropriate time, from the second electrical signal, a second information signal representing at least one predetermined quantity outside said range.
-
-
27. A device for processing a first electrical signal and a second electrical signal, said device cooperating with
means for connecting a product present in a reservoir to a predetermined potential to make a connection of the product to the predetermined potential, means for establishing a first electrical field through the product present in the reservoir, and adapted to establish a second electrical field, through the product present in the reservoir, the second electrical field being differentiated from the first electrical field by at least one characteristic, means for measuring the first electrical field and the second electrical field in order to produce the first electrical signal and the second electrical signal respectively representing the first electrical field and the second electrical field, said device comprising: -
means for producing a first information signal able to take a plurality of values making a representation of the quantity of product present in the reservoir, means for determining the quantity of product, in accordance with at least one range of quantities in which said representation is directly usable, and means for producing, at an appropriate time, from the second electrical signal, an information signal corresponding to an interruption of the connection of the product to the predetermined potential, said interruption corresponding to a predetermined quantity outside said range.
-
Specification