Xerox Corporation

Cory Joseph Winters

Ajay Kumar

Keith Allan Nau

David Antwone Reed

John F Knapp

Michael D Thompson

Rachael L McGrath

Paul Windsor Morehouse, Jr

Rasin Moser

Jennifer R Wagner

Jonathan David Sadik

Hirotsugu Oba

Song Feng Mo

Allen T Retzlaff

A magnetic roll having longitudinal grooves machined in its rotating sleeve enables a pair of rolls to be rotated in a direction opposite to the direction of a photoreceptor moving through a development zone and a trim blade to be mounted proximate one of the rolls at a trim gap of approximately 0.5 to 0.7 mm. The magnetic roll includes a stationary core with at least one magnet, and a sleeve having longitudinal grooves that is mounted about the stationary core so that the sleeve rotates about the stationary core. The sleeve has a relatively smooth surface area between the grooves.

Xerographic developer unit having multiple magnetic brush rolls with a grooved surface

A development station that improves toner halftone dot development over a wide range of environmental conditions includes a developer housing for retaining semi-conductive carrier particles and toner particles, a first magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the first magnetic roll, a second magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the second magnetic roll, an environmental sensor for generating an environmental condition signal, a variable voltage supply coupled to the first magnetic roll and the second magnetic roll, and a control circuit for adjusting an output level for the variable voltage supply.

Environmental controls for operation of an electrostatographic developer unit having multiple magnetic brush rolls

Growing community of inventors

Rochester, NY, United States of America

Cory Joseph Winters