Quad/graphics, Inc.

Micron Corporation

Nicholas R Schetter

Frederick A Voeltner

Ronald J Frias

David Jagielski

An anti-ghosting roller having a main shaft, an inner race detachably mounted on the main shaft, a rotary bearing having movable bearing elements (e.g., needle bearings) positioned on the inner race, a roller core secured to the rotary bearing, and an end collar mounted to the shaft and spaced from an end of the roller core such that the roller core can both rotate and axially oscillate relative to the main shaft. The inner race extends beyond the end of the rotary bearing. An end collar is mounted to the end of the shaft. The end collar includes a spacer portion extending axially toward the roller core. The spacer portion is radially spaced from the main shaft so that it is free from interaction with the inner race.

Anti-ghosting roller

A reader/printer apparatus includes a main frame having an optical system for exposure of photocopy paper with the image on a film carrier in combination with an integrated modular developing station which is adapted to receive any one of a plurality of different developer modules. Each module is a self-contained plug-in type structure and includes a dry silver paper developer module and an electrostatic developer module are provided. Each module includes an infeed unit and a discharge unit for passing the paper from the exposure unit through the developer module. The dry silver module includes a suitable transfer roll and mating heating bars for developing the exposed dry silver paper. The electrostatic module includes a magnetic toner brush assembly to deposit toner particles in the image area. Each module includes an essentially identical rectangular frame structure corresponding to a rectangular developer chamber having a suitable guide means. Either of the modules is directly mounted into the developer chamber, with the infeed unit aligned with the discharge unit from the exposure station and a discharge unit aligned with an exit opening. A corona charging module is releasably mounted in the reader/printer immediately upstream of the entrance into the exposure station or unit. This module charges the photoconductive paper for electrostatic printing prior to entrance into the exposure station. The charging module is replaced with a transfer guide for dry silver printing. The charging may be negative or positive. A power supply switch includes a dead band area in switching from one polarity to the other and includes a pair of electromagnetic vacuum enclosed reed switches connecting the high voltage to the corona charging wires.

Growing community of inventors

Rubicon, WI, United States of America

Nicholas R Schetter