Patent Document ID: 4150902
Application ID: 05814135

Base Claim:
1. An electronic printer having a single tracing element for tracing alphanumeric characters, comprising spacing means for relatively moving said tracing element and the paper in a letter spacing relationship, driving means for shifting said tracing element along a pair of coordinates parallel to the printing plane independently of the said letter spacing, for tracing each character, storing means for storing a set of addressable numerical instructions for each one of said characters, addressing means conditionable for sequentially addressing the instructions of a predetermined character, printing control means operable for conditioning said driving means according to a character to be printed, detecting means for detecting the position of said tracing element, D/A converting means for converting the numerical instructions so addressed into command signals, comparison means for comparing the signals given by said detecting means and by said converting means, and servo control means conditioned by said comparison means for controlling said driving means.

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Claim 2:
2. A printer according to claim 1, wherein said instructions define the speed of said element in a predetermined interval of time along said coordinates, and comprising a pair of control circuits included in said control means for controlling said driving means, integrating means connected to said control circuits, detecting means included in said servo control means for detecting the position of the said tracing element, and comparison means for comparing the signals of said detecting means and the singals corresponding to said instructions.