Hewlett-packard Company

Richard L Swantner

Mark John Wibbels

Wayne E Foote

Gar P Kelly

Embodiments of a material-moving electrophotography roller are shown and described, each embodiment having an outer surface having ridges. The ridges may extend in right-handed or left-handed orientation, or in other angled (non-radial and non-horizontal) manner. The ridges lie in such a pattern so that the ridges move material radially over the roller or against a restrictive surface, and so that there are no gaps in the contact between the ridges and the material or the restrictive surface during a revolution of the roller. The roller is preferably made of a shaft covered by a sleeve or tube of non-disintegrating material with external ridges. The ridged tube is twisted and secured to the shaft so that the ridges run preferably and substantially at a 45.degree.-75.degree. angle from perpendicular to the roller axis. Alternatively, a monofilament line or other non-disintegrating cord may be wrapped and secured around a cylinder to create the ridges and troughs necessary for material movement and for distribution of the time of engagement of the ridges on material or surfaces.

Electrophotography developer canister with material-moving roller

A magnetic circuit structure for use in an actuator, where the actuator has a displaceable assembly and a coil attached to such assembly, is shown to include flux conductors having generally parallel first and second poles defining gaps therebetween and an integrally formed base joining one end of the first and second poles so that the conductor defines a continuous flux path, and magnets attached to each of the first poles in the gaps so that flux from the magnets is directed across the gaps, wherein a portion of the coil passes through said gap, so that when a current is passed through the coil, the assembly moves.

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Meridian, ID, United States of America

Richard L Swantner