Printing up to edges of printing medium without platen soiling

Details Printing up to edges of printing medium without platen soiling Printing up to edges of printing medium without platen soiling

2005-02-22

2005-02-22

Nguyen, Lamson D (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S041000

Reexamination Certificate

active

06857725

ABSTRACT:
The printing is performed to the edges of printing paper without depositing ink drops on the platen. The platen26of the printer of the present invention comprises, in order from the upstream end in the sub-scanning direction, an upstream support portion26sf, a recessed portion26f, and a downstream support portion26sr. The printer performs printing of the upper edge portion of printing paper using only a nozzle group Nh facing recessed portion26f, and performs printing of the lower edge portion of printing paper using only a second nozzle group Nh facing recessed portion26f. Between printing of the upper edge portion and intermediate portion, there is performed an upper edge transition process wherein printing is performed using all nozzle groups in the same manner as in the intermediate portion, but with the same sub-scan feed as in the upper edge portion. Between printing of the intermediate portion and lower edge portion, there is performed a lower edge transition process wherein printing is performed using all nozzle groups, but with the same sub-scan feed as in the lower edge portion. By performing these transition processes, upper edge processing, intermediate processing and lower edge processing can be performed smoothly without sub-scan back-feed.

REFERENCES:
patent: 4198642 (1980-04-01), Gamblin
patent: 6464335 (2002-10-01), Suzuki
patent: 6565192 (2003-05-01), Vinals et al.
patent: 2000-118058 (2000-04-01), None

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