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Marie Helene Froger, Pascal Coudray, Mickael Lorgeoux: Method and device for monitoring the operational state of a reservoir, for example an ink reservoir. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, December 26, 2000: US06164744 (24 worldwide citation)

In order to monitor the state of a reservoir made of electrically insulating material containing a normally electrically conductive product, ink for example, the free end of the outlet channel of the reservoir is connected to a predetermined potential and two measurement procedures are defined, the ...


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Marie Helene Froger, Pascal Coudray: Method and device for monitoring the consumption of a product, such as an ink, contained in a reservoir. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, July 18, 2000: US06089688 (19 worldwide citation)

In order to monitor the consumption of a normally electrically conductive product contained in a reservoir made of electrically insulating material, a measurement procedure is defined according to which there is taken off a measurement signal in response to an excitation signal applied to a storage ...


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Marie Hélène Froger, Pascal Coudray, François Delumeau, Alexandre Dodge: Method and device for detecting the absence of a product in a reservoir. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, August 20, 2002: US06438500 (17 worldwide citation)

Detecting presence or absence of product in a reservoir by transmitting a signal affected by the product. The signal is detected from among other signals with which it is subsequently received by discrimination and delivery of an output signal whose level is set by the discrimination, and by samplin ...


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Philippe Piret, Pascal Coudray: Method and device for detecting and correcting any error in a sequence of numbers. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, May 18, 1999: US05905739 (14 worldwide citation)

According to a first aspect, the invention relates to the transmission of an "initial" sequence of at most 2.sup.n numbers, where n is a predetermined natural number, representing binary data modulating a predetermined physical quantity, characterized in that, successively:


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Pascal Coudray: Energy saving image edging method and device. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, May 11, 1999: US05902054 (13 worldwide citation)

Printing method and device enabling a low energy level to be indicated while extending the consumption duration and number of pages printed for a predetermined quantity of energy. According to the invention, detection of a predetermined quantity of energy remaining in an energy source (37) is interp ...


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Marie Helene Froger, Pascal Coudray, Mickael Lorgeoux: Method and device for monitoring the consumption of a product, for example a printing ink, using a low-pass filter. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, September 25, 2001: US06293144 (5 worldwide citation)

In order to monitor the consumption of a normally electrically conductive product contained in a storage chamber of a reservoir made of electrically non-conductive material, the storage chamber is disposed in a capacitive arrangement and a measurement procedure is defined, according to which, in res ...


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Pascal Coudray, Marie Hélène Froger, Mickaël Lorgeoux, Christophe Truffaut: Process for measuring the electrical resistance of a resistive body for example for checking the conformity of a liquid product and devices for carrying out such a process. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, June 18, 2002: US06407557 (5 worldwide citation)

Measuring the electrical resistance of a resistive body, in particular a reservoir containing a printing product such as ink. According to the invention, the resistive body is used to define a capacitance arrangement formed from a capacitive branch which includes a capacitor electrically connected t ...