Kenneth C Stevenson

US Patent:

46865403, Aug 11, 1987

Filed:

Apr 15, 1986

Appl. No.:

6/852987

Inventors:

Elmer N. Leslie - Dallas TX
Stephen S. Treadwell - Dallas TX
Thomas J. DiFloria - Allen TX
Larry D. Propst - Rowlett TX
Richard T. Kushmaul - Dallas TX
Paul A. Abney - Dallas TX
Kenneth Stevenson - Plano TX
C. Kenneth Thomaston - Dallas TX

Assignee:

Microdynamics, Inc. - Dallas TX

International Classification:

G01D 900

US Classification:

346 33R

Abstract:

A compact plotter is disclosed, having a small area in which a plurality of print heads (10) are laterally scanned to print impressions on the paper (14), and the paper (14) is incrementally advanced by an indexer (42) past the print heads (10). A paper travel encoder (36) measures the paper advancement. A computer 22 and a processor 26 are provided to coordinate the printing of pattern data stored in a data base (24) both with the movement of the print heads (10) and the advancement of the paper (14). The computer (22) allocates data from the data base (24) to be printed according to the amount of paper advancement. If the paper (14) is advanced more than a predefined amount, more data is allocated for printing than is actually printed. If the paper (14) is advanced less than the predefined amount, less data is allocated to be printed than is actually printed.