High quality printer

Details High quality printer High quality printer

1977-06-30

1979-07-03

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 364900, B41J 312

Patent

active

041598822

ABSTRACT:
The printing apparatus disclosed herein generates alphanumeric characters of high quality, using a multi-pin printing head capable of forming discrete dots or pels, by controlling the actuation of the printing head with a timing resolution which is an order of magnitude finer than the nominal dot diameter so that a line smoothness for slanted or curved lines is obtained which is greater than that obtainable by a uniform matrix. The printing head is repeatedly traversed or scanned across the paper to provide essentially parallel lines of scan separated vertically by a distance which is a submultiple of the vertical spacing of the pins so that overlapping dots may be provided in the vertical dimension. By these means the apparatus facilitates the formation of smooth lines of essentially arbitrary slope or curvature.

REFERENCES:
patent: 3627096 (1971-12-01), Finnegan
patent: 3900094 (1975-08-01), Larsen et al.
patent: 3913719 (1975-10-01), Frey
patent: 3941230 (1976-03-01), Bellino et al.
patent: 3964591 (1976-06-01), Hill et al.
patent: 4010835 (1977-03-01), Martin et al.
patent: 4037705 (1977-07-01), Martin et al.
patent: 4081799 (1978-03-01), Granberg et al.
IBM Tech. Disc. Bulletin, J. W. Raider, "Additional Print Positions for a Matrix Printer", vol. 17, No. 12, May 1975, pp. 3560-3561.

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