Lexmark International, Inc.

Robert Watson McAlpine

Brian Scott Carpenter

Donato Austria Marmol

Michael Nuestro Bayubay

Salvador Capurihan Bonanciar

Katrina Rosit Lactuan

Donald Wayne Stafford

Gregory Scott Tigges

Michael Craig Leemhuis

Mark Duane Foster

Jason Carl True

Matthew Lee Rogers

James Daniel Anderson, Jr

Harald Portig

Jason Paul Hale

Kerry Leland Embry

Douglas Anthony Able

Kyle Bradley Martin

Jeremy Keith Payne

Franklin Joseph Palumbo

Martin Victor DiGirolamo

Jeffrey Alan Abler

David Starling MacMillan

Alexander Johannes Geyling

Bartley Charles Gould, Ii

Benjamin Erich Kant

Michael Brian Bacelieri

Alfred Louis Fahmy

Andrew Pryse Dale

Matthew Russell Smither

Jonathan Murray Hill

Mark William Johnson

Jared Kuohui Lin

William Dale Smith

Richard Kent Anderson

Masahito Cho

Jing X Sun

Edward Lynn Triplett

Thomas Eugene Pangburn

Ligia Aura Bejat

Cory Nathan Hammond

Rick Owen Jones

Bhaskar Gopalanarayanan

Robert Francis Soto

Thomas Wilbur Blanck

Matthew Thomas Martinkovic

Peter Nikolaivich Yaron

Whitney April Greer

James Thomas Welch

Jamie Piotrowski

Claudia Alexandra Marin Goggin

A toner cartridge according to one example embodiment includes a housing having a toner reservoir. An outlet port faces downward on a front of the housing near a first side of the housing. A linkage is positioned on the first side of the housing and has an engagement surface that is accessible at the rear of the housing. A projection is positioned on the first side of the housing and is movable between a first position and a second position. The projection is operatively connected to the linkage such that the projection moves upward from the first position to the second position when the engagement surface receives a forward force that is toward the front of the housing. The projection extends outward sideways from the first side when the projection is in the second position.

Toner cartridge having a movable projection for providing installation feedback to an image forming device

A replaceable unit for an electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet are detectable by a magnetic sensor when the replaceable unit is installed in the image forming device. A polarity of the first magnet is oriented opposite a polarity of the second magnet relative to the shaft. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.

Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing

A replaceable unit for an electrophotographic image forming device according to one example embodiment includes a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet pass near at least a portion of an inner wall of the housing forming the reservoir during rotation of the first and second magnets. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.

An imaging device includes a photoconductive drum charged by a charge roll and opposed by a transfer roll to transfer an image from the drum. The drum becomes biased to a negative voltage by setting charges of negative voltage on both the charge roll and transfer roll. A controller switches the bias of the transfer roll to a positive voltage from the negative voltage and a delta or difference in a charge of the drum is determined from before and after the switching. Based on the delta, the voltage on the charge roll is boosted by a boost voltage to improve the charge on the drum. In this way, deteriorating or defective charge rolls can be still used to charge the drum to a proper voltage for imaging. Techniques for determining the delta, the boost and the magnitude of voltage charges are further embodiments.

Compensation for deficient charge roll in an imaging device

Toner cartridge

An electrophotographic image forming device according to one example embodiment includes a replaceable unit including a housing having a reservoir for storing toner. A rotatable shaft is positioned within the reservoir and has an axis of rotation. A first magnet and a second magnet are connected to the shaft and rotatable around the axis of rotation in response to rotation of the shaft. The first magnet and the second magnet pass near at least a portion of an inner wall of the housing forming the reservoir during rotation of the first and second magnets. An amount of angular offset between the first magnet and the second magnet varies depending on an amount of toner in the reservoir.

Image forming device having a replaceable unit that includes magnets of varying angular offset for toner level sensing

Growing community of inventors

Lexington, KY, United States of America

Robert Watson McAlpine