Ink jet printer

Details Ink jet printer Ink jet printer

1994-04-26

1996-05-07

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Medium and processing means

347 8, 400642, 400 56, 400 58, B41J 1310, B41J 201

Patent

active

055150942

ABSTRACT:
A leaf plate is disposed in abutment, through a guide path of printing paper, with a feed roller whose peripheral surface is in contact with the guide path. The printing paper is transported by the feed roller rotationally driven while the printing paper is pressed against the feed roller by the leaf plate. In the course of transportation of the printing paper, the printing paper fed by the feed roller is guided along a flat paper guide surface, and printing is performed by having ink jetted from a nose portion of an ink jet head to the printing paper being guided as described above. Immediately before the printing position in the guide path, there are disposed a plurality of projections in contact with the guide path and at predetermined intervals in the direction transverse to the printing paper. By bringing the transported printing paper into contact with the projections, the amplitude of undulations continuously produced in the printing paper in the direction transverse to the paper is reduced. Thus, the distance between the nose portion of the ink jet head and the printing paper in the printing position is made uniform and the quality of printing is improved.

REFERENCES:
patent: 4165029 (1979-08-01), Mitchell
patent: 4491854 (1985-01-01), Habelt et al.
patent: 4729557 (1988-03-01), Kiyohara
patent: 5356229 (1994-10-01), Hickman et al.
patent: 5356231 (1994-10-01), Nakamura et al.
patent: 5393151 (1995-02-01), Martin et al.
Patent Abstracts of Japan, vol. 11, No. 146 (M-587), May 13, 1987, JP-61-280967, Dec. 11, 1986.
Database JAPIO, Japan Patent Information Organization, AN-93-221061, JP-5-221061, Aug. 31, 1993.

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