Shifted element scanning/printing routine coordinated with media

Incremental printing of symbolic information – Ink jet – Ejector mechanism

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Details

347 16, B41J 2145, B41J 215, B41J 2938

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active

060171146

ABSTRACT:
A shifted element printing/scanning routine coordinated with media advance through an interaction zone of hardcopy device is provided for inkjet printing mechanisms, scanners or multi-function hardcopy devices. A method is provided of coordinating operation of a reciprocating head with media advance. The head has plural interaction elements, which may be ink-ejecting nozzles in a printing mechanism, or image receptors in a scanning mechanism, with the interaction elements being arranged in a linear array to selectively interact with media. A hardcopy device has a rotating media advancing member, a reciprocating head carrying the interaction elements, an encoder having indicia to track media advance, and a sensor that interprets the encoder indicia and generated a media position signal. A controller adjusts the media advance and shifts operation of selected interaction elements to other interaction elements along the linear array to avoid an indeterminate region of the position signal where the media position cannot be ascertained.

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Commonly-assigned, co-pending U.S. Patent Application No. 08/840,079, filed Apr. 9, 1997, entitled "Position Encoder".

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