Drop detector for ink jet apparatus

Details Drop detector for ink jet apparatus Drop detector for ink jet apparatus

1996-12-12

2000-05-16

Barlow, John

Incremental printing of symbolic information

Ink jet

Controller

374163, 374166, B41J 2195

Patent

active

060626682

ABSTRACT:
A drop detection apparatus has a thermosensitive substrate for receiving drops of ink and providing a signal representative of a change in the temperature in the thermosensitive substrate which is caused by the ink drops deposited on the thermosensitive substrate. The thermosensitive substrate is made from a pyroelectric material, such as, for example, polyvinylidene fluoride (PVDF) and lead zirconium titanate (PLZT). As a result, a drop detection apparatus has a substantially simplified structure for detecting drops of ink ejected from large numbers of jets. Furthermore, since a drop detection apparatus relies on the temperature difference between the thermosensitive substrate and the drop of ink which is substantially small in size, the drop detection apparatus can be made substantially small in size, therefore suitable for a small sized ink jet apparatus.

REFERENCES:
patent: 3872318 (1975-03-01), Murayama
patent: 3898673 (1975-08-01), Haskell
patent: 4067019 (1978-01-01), Fleishcer et al.
patent: 4323905 (1982-04-01), Reitberger et al.
patent: 4835435 (1989-05-01), Yeung et al.
patent: 5508722 (1996-04-01), Saito et al.
patent: 5644343 (1997-07-01), Allen
International Search Report for PCT Application No. PCT/US97/22057 dated Dec. 10, 1997.
Japan Patent Abstract, Publication No. 56038267 dated Apr. 13, 1981.

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