Electrophotography – Image formation – Development
Patent
1997-07-21
1998-12-29
Grimley, Arthur T.
Electrophotography
Image formation
Development
399254, 399283, 492 35, G03G 1508
Patent
active
058549617
ABSTRACT:
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.
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Kelly Gar P.
Swantner Richard L.
Wibbels Mark
Chen Sophia S.
Grimley Arthur T.
Hewlett--Packard Company
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