Ink jet recording apparatus and method using ink jet head having u-shaped wiring

a technology of ink jet head and recording apparatus, which is applied in the field of droplet forming apparatus, can solve the problems of insufficient inability to provide uniformity of droplet diameter, and inability to compact the entire apparatus, and achieves the effect of easy manufacturing and excellent uniformity of ink droplet discharg

USRE40529E1Inactive Publication Date: 2008-10-07CANON KK
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2008-10-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

An ink jet recording method includes the steps of providing an ink jet recording head having a plurality of discharge openings for discharging ink, a plurality of liquid passageways for holding ink and a plurality of heat generating members. Each of the heat generating members corresponds to a liquid passageway and each heat generating member has a pair of electrodes for driving the heat generating member individually and the electrodes and corresponding heat generating member form a U-shaped wiring portion. The recording head may be manufactured using a cutting process. A voltage is applied to selected pairs of electrodes for driving selected heat generating members individually for providing thermal energy to the ink in the liquid passageway for abruptly forming a bubble and discharging ink from the discharge opening and recording on a recording medium.
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Description

[0001]This application is a continuation of application Ser. No. 08 / 159,709 filed Dec. 1, 1993, now abandoned, which in turn is a continuation of application Ser. No. 07 / 998,053 filed Dec. 29, 1992, now abandoned, which is a division of application Ser. No. 07 / 711,418 filed Jun. 5, 1991, now U.S. Pat. No. 5,204,689, which is a continuation of application Ser. No. 07 / 632,610, filed Dec. 27, 1990, now abandoned, which is a continuation of application Ser. No. 07 / 403,860, filed Sep. 1, 1989, now abandoned, which is a continuation of application Ser. No. 07 / 188,071, filed Apr. 28, 1988, now abandoned, which is a continuation of application Ser. No. 07 / 013,172 filed Feb. 9, 1987, now abandoned, which is a continuation of application Ser. No. 06 / 846,472 filed Mar. 31, 1986, now abandoned, which is a continuation of application Ser. No. 06 / 750,985 filed Jul. 1, 1985, now abandoned, which is a continuation of application Ser. No. 06 / 639,531 filed Aug. 9, 1984, now abandoned, which is a cont...

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Embodiment Construction

[0025]In the thus constructed droplet forming apparatus of the present invention, signal energy is effectively used to cause ink to discharge and fly as droplets, thus greatly improving the discharge efficiency of ink droplets, discharge responsiveness and long-time continuous recording capability. Above all, in the apparatus of the present invention, the size and discharge direction of ink droplets discharged through the discharge orifice are not at all disturbed and the apparatus is excellent in uniformity of discharged ink droplets and discharge stability.

[0026]Also, the apparatus of the present invention is simple in construction and the minute machining thereof can be easily accomplished so that the droplet forming head portion itself can be made much more compact as compared to the conventional apparatus, and the simplicity of the construction thereof and the ease of the machining thereof lead to great ease with which a highly dense multi-orifice array indispensable for high-s...