Multiple speed printer

Details Multiple speed printer Multiple speed printer

1982-03-01

1984-03-27

Griffin, Donald A.

Recorders

Record receiver deforming

G01D 1518

Patent

active

044397755

ABSTRACT:
A dot matrix printer has a dot generator which projects dots through a dot selector and dot deflector towards a recording medium. Dots used for printing are selectively charged by the dot selector and deflected vertically by the dot deflector for printing on the recording medium. The dot generator moves horizontally at a speed S across the recording medium. Dots not used for printing are not charged, not deflected, and are collected in a gutter. A data input designates to the dot selector the character to be printed. A speed selector is operable to select standard speed printing S.sub.1, or high-speed printing S.sub.2. Speed S.sub.2 is equal to some factor Z multiplied by standard speed S.sub.1. If the standard speed printing is selected, the dot selector accesses the standard speed character matrix memory and receives dot position information corresponding to the designated character. The dot position information comprises X adjacent and parallel vertical scans, each scan comprising a column of Y potential dot, or matrix, positions. The dot selector codes each sequential dot with the position information for the next sequential matrix position of the scan. If high-speed printing S.sub.2 has been selected, the dot selector accesses the high-speed character matrix memory and receives dot position information corresponding to the designated character. The dot position information comprises X adjacent and parallel vertical scans, each scan having Y/Z potential dot, or matrix, positions. Since the matrix positions in the column of the scan have been reduced from Y to Y/Z, the standard scan time T is reduced to T/Z and the scan time is reduced in proportion to the increase in print speed.

REFERENCES:
patent: 3938163 (1976-02-01), Fujimoto et al.
patent: 3964591 (1976-06-01), Hill et al.
patent: 3972052 (1976-07-01), Atumi et al.
patent: 4025925 (1977-05-01), Jensen et al.
patent: 4045770 (1977-08-01), Arnold et al.
patent: 4115787 (1978-09-01), Futimoto et al.
patent: 4115788 (1978-09-01), Takano et al.
patent: 4172417 (1977-09-01), Fardeav et al.
patent: 4216480 (1980-08-01), Buehner et al.

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