Droplet ejection apparatus

Details Droplet ejection apparatus Droplet ejection apparatus

2006-04-28

2008-10-28

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

07441849

ABSTRACT:
A droplet ejection apparatus which includes: a platen on which an ejection target medium is conveyed; a head that ejects droplets toward the platen, the head being provided in a reciprocable manner along the platen; a light emitting device that emits a light in an oblique direction toward the platen within a plane including a straight line along a moving direction of the head and a normal line with respect to the platen; a light receiving device that receives the light emitted from the light emitting device and regularly reflected by one of the platen and the ejection target medium; and a calculation device that calculates a distance between the one of the platen and the ejection target medium, and the head, based on a position at which the light receiving device receives the light during a movement of the head. One of the light emitting device and the light receiving device reciprocably moves integrally with the head, and the other is provided separately from the head.

REFERENCES:
patent: 5004928 (1991-04-01), Suzuki et al.
patent: 6137503 (2000-10-01), Hashimoto et al.
patent: 2005/0280665 (2005-12-01), Flotats et al.
patent: 1989264871 (1989-10-01), None
patent: 1990056375 (1990-02-01), None
patent: 2003246500 (2003-09-01), None

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