Lexmark International, Inc.

Other

Texas Instruments Corporation

Adam Jude Ahne

Mark Joseph Edwards

Christopher Alan Adkins

William Michael Connors

Brian Keith Owens

Graydon Randall Dodson

Michael Anthony Marra, Iii

Frank Edward Anderson

James Ronald Booth

Patrick Laurence Kroger

David Allen Crutchfield

Ricky Earl Robbins

Galen Arthur Rasche

Michael Kelley Webb

Randal Scott Williamson

George Keith Parish

Randall David Mayo

Roger Steven Cannon

Kristi Maggard Rowe

Edmund Hulin James, Iii

John Thomas Writt

Michael Clark Campbell

Douglas Laurence Robertson

Alexander Lloyd Chapman

William George Goff, Iii

Barry Baxter Stout

Sean Terrance Weaver

John Glenn Edelen

Sam Norasak

Jeffery James Buchanan

Mahesan Chelvayohan

Thomas Jon Eade

Curtis Ray Droege

Mark Stephen Underwood

John Dennis Zbrozek

Raymond Jay Barry

Ronald Todd Sellers

Thomas Allen Bailey

John Douglas Anderson

David Michael Cseledy

Jay William Vessels

Paul Harrington, Iii

David Craig Stevenson

Stephen Andrew Budelsky

George Chausanski

Matthew David Clarke

Ellis Matthew King

Jimish Doshi

Miles Edward Anderson

Alexander Phillip Maroudis

Renee Garcia, Jr

John D Zbrozek

A toner cartridge for an image forming device includes a body for holding toner and a flight. The flight contains magnetic particles and is configured to guide movement of a magnetic field sensor. The magnetic particles generate a magnetic field that the sensor reads. Other systems and methods are disclosed.

Toner cartridge for image forming device including flight with magnetic particles to generate a magnetic field

A method of operating an I2C slave having an I2C clock pin and an I2C data pin is disclosed. The method includes (a) receiving a command via the I2C clock pin and the I2C data pin, (b) driving the I2C data pin to logic low for a first duration, (c) not driving the I2C data pin to logic low for a second duration, and (d) repeatingly alternating (b) and (c) until a termination event occurs. (b) and (c) are not synchronized to transitions of the I2C clock pin. Other methods and systems are disclosed.

Systems and methods for asynchronous toggling of I2C data line

Systems and methods for authenticating printer supply items using revocation lists are disclosed. Revocation lists are updated using DNSSEC to communicate between a printer and a DNS name server. A domain name is created containing a printer supply item serial number, a message digest, and a message authentication code. The domain name is sent to the DNS name server, and the returned IP address is used to update a revocation list. Other systems and methods are disclosed.

Systems and methods for authentication of printer supply items

A helical physical unclonable function is disclosed. The helical physical unclonable function may be used to authenticate a supply item for an imaging device. Measurements of the magnetic field adjacent a helical flight are stored in a non-volatile memory to be used by an imaging device to authenticate the supply item. Other systems and methods are disclosed.

Magnetic helical physical unclonable function measured adjacent to flight

A helical physical unclonable function is disclosed. The helical physical unclonable function may be used to authenticate a supply item for an imaging device. Measurements of the magnetic field above a helical flight are stored in a non-volatile memory to be used by an imaging device to authenticate the supply item. Other systems and methods are disclosed.

Magnetic helical physical unclonable function measured above flight

Methods for manufacturing a supply item for an imaging device having a helical physical unclonable function are disclosed. The helical physical unclonable function may be used to authenticate a supply item for an imaging device. Measurements of the magnetic field above a helical flight are stored in a non-volatile memory to be used by an imaging device to authenticate the supply item. Other systems and methods are disclosed.

Manufacturing a helical physical unclonable function

A capacitance measuring system, including: a calibration capacitor; first circuitry for sensing an input current at an input thereof and generating an output signal that is based upon a capacitance appearing at the input of the first circuitry; and multiplexer circuitry, coupled between the input of the first circuitry and a terminal of each of the capacitor to be measured and the calibration capacitor, for selectively coupling the terminal of each, one at a time, to the input of the first circuitry while the terminal not coupled to the input of the conversion circuitry is coupled to a ground reference; and controller circuitry for calculating a capacitance of the capacitor to be measured based upon the output signal of the first circuitry when the capacitor to be measured is coupled to the input thereof and upon the output signal of the first circuitry when the calibration capacitor is coupled to the input thereof.

Capacitive measurement multiplexing circuit and method

A method of operating a module is disclosed. The method includes determining if a voltage between a power connection and a ground connection exceeds a predetermined threshold and if so determined then setting a module communication address to a first address, responding to a first serial communication received via the serial communication connection addressed to the module communication address, and not responding to a second serial communication received via the serial communication connection addressed to a different address than the module communication address. Other methods and devices are disclosed.

Methods and apparatus for setting the address of a module using a voltage

A method of operating an imaging device having a failed or failing media-full sensor determines whether or not a controller can trust the output signal received from the media-full sensor. A reduced power or intensity level is used to test the media-full sensor and, in particular, the light source to counter the dimming of the light source that occurs due to aging and electrical noise in the system. When the output signal of a photoreceptor is at or below a threshold value, the photo-receptor is considered to have not detected the light beam from the light source and the light beam is deemed not to have been detected even though the photo-receptor may be providing a lower level output signal. Thus, an output signal of the photo-receptor is not trusted and an indication that a media storage area is not full is provided and an imaging operation is carried out.

Method for operating an imaging device with a failed media bin level sensor

A circuit module is disclosed. The circuit module has a ground connection, a power connection, a shunt regulator coupled to the power connection and to the ground connection, a current measuring circuit that measures a current flowing between the power connection and the ground connection, one or more communication connections, and a digital logic circuit coupled to the one or more communication connections to send and receive communications. The digital logic circuit responds to communications addressed to a communication address with the communication address based on the current measured by the current measuring circuit. Other systems are disclosed.

Systems for setting the address of a module

A method of operating a module is disclosed. The method includes determining a voltage between an I2C clock connection and a ground connection, setting a module communication address based on the determined voltage, receiving via the I2C clock connection and the I2C data connection a first command addressed to the module communication address, and responding to the first command. Other methods and devices are disclosed.

Methods and apparatus for setting the address of a module using a clock

A method of operating a module is disclosed. The method includes adjusting an impedance between a power connection and a ground connection to regulate a power connection voltage targeted to a predetermined target voltage, and setting a module communication address based on the adjustment. The power connection voltage is a voltage on the power connection. Other methods are disclosed.

Methods for setting the address of a module

A circuit and system for sensing a capacitance of a capacitive sensor disposed in a toner container of an electrophotographic imaging apparatus. The circuit and system may include an AC signal generator and conversion circuitry, coupled to the capacitive sensor, for detecting an AC current appearing on the capacitive sensor and converting the detected AC current to a substantially DC voltage, relative to a local ground, the local ground serving as a ground reference for the conversion circuitry. The AC signal generator is coupled between the local ground and a system ground. Physically separating the AC signal generator from the capacitive sensor allows for parts of the capacitive sensor to be used to perform other functions in the toner container.

Capacitive supply level sensing circuit and method

A method to generate a plurality of image panels for assembly as a poster includes determining an individual image boundary for each of a plurality of image data portions; associating a corresponding incising boundary with each individual image boundary, wherein at least a portion of each individual image boundary is coincident with the corresponding incising boundary; printing an image portion at a location on a sheet of media in accordance with the individual image boundary of an image data portion that corresponds to the image portion; incising the sheet of media with the incising unit along the corresponding incising boundary to form an individual image panel of the plurality of image panels; and repeating the printing and the incising until all of the plurality of image data portions are processed to form the plurality of image panels.

Method for using an imaging apparatus to generate image panels for assembly as a poster

An inkjet printhead. The inkjet printhead includes a temperature-sensing resistor with a low voltage end which is connected to a ground structure that at least partially encloses the temperature sensing resistor.

Ground structure for temperature-sensing resistor noise reduction

Growing community of inventors

Lexington, KY, United States of America

Adam Jude Ahne