Ink jet recording apparatus with vacuum platen

Details Ink jet recording apparatus with vacuum platen Ink jet recording apparatus with vacuum platen

1990-07-19

1992-06-23

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

346140R, 400648, B41J 204, B41J 1102

Patent

active

051247283

ABSTRACT:
An ink jet recording apparatus composed of a print head of the on-demand type for ejecting an ink droplet according to print data and a platen having a flat section opposed to the head and extending at least over a region corresponding to a printing span through which the head is displaced to effect printing. The flat section of the platen is formed with a plurality of opening holes each having a relatively small diameter. A vacuum device creates a vacuum beneath the platen to attract a recording medium onto the flat section to enable the recording medium to receive ink droplets ejected from the head so as to print an image. The dimensions or the density of the opening holes is gradually reduced so as to compensate for differences in width of the recording media to thereby effectively avoid floating of a medium.

REFERENCES:
patent: 3741116 (1973-06-01), Green et al.
patent: 4294540 (1981-10-01), Thettu
patent: 4463361 (1984-07-01), Koumura
patent: 4504843 (1985-03-01), Prohl et al.
patent: 4992805 (1991-02-01), Yoshizawa

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