Claims
- 1. A liquid jet recording head having a liquid chamber and a liquid discharging conduit with an inlet in direct communication with said liquid chamber for introducing liquid into said liquid discharging conduit along a first flow path, said liquid discharging conduit comprising an energy actuating region for imparting discharging force to a liquid, a liquid introducing region for introducing liquid from said inlet at the liquid chamber side of said conduit to said energy actuating region along the second flow path generally parallel to the first flow path, and a liquid discharging region between said energy actuating region and a liquid discharging outlet, wherein the average cross-sectional area of the conduit decreases substantially monotonically from said inlet to said outlet.
- 2. A liquid jet recording head according to claim 1, wherein the average cross-sectional area of the conduit at said energy actuating region, S.sub.1, and the average cross-sectional area of the conduit at said liquid introducing region, S.sub.2, satisfy the relation, S.sub.2 /S.sub.1 .gtoreq.1.3.
- 3. A liquid jet recording head according to claim 1, wherein said energy actuating region has a heating element arranged therein.
- 4. A liquid jet recording head according to claim 2, wherein S.sub.2 /S.sub.1 defines a value (x) which satisfies the following numerical formula:
- 10.gtoreq.x.gtoreq.1.3.
- 5. A liquid jet recording head according to claim 2, wherein a plurality of the liquid discharging conduits are provided.
- 6. A liquid jet recording head according to claim 1, wherein said liquid discharging conduit comprises a wall formed of a hardened film of photosensitive resin provided on a surface of a substrate and a liquid chamber, and wherein the average cross-sectional area of the conduit at said energy actuating region, S.sub.1, and the average cross-sectional area of the conduit at said liquid introducing region, S.sub.2, satisfy the relation S.sub.2 /S.sub.1 .gtoreq.1.3.
- 7. A liquid jet recording head according to claim 1, wherein said liquid discharging conduit comprises a wall formed of a hardened film of dry film photoresist provided on a surface of substrate and a liquid chamber, and wherein the average cross-sectional area of the conduit at said energy actuating region, S.sub.1, and the average cross-sectional area of the conduit at said liquid introducing region, S.sub.2, satisfy the relation S.sub.2 /S.sub.1 .gtoreq.1.3.
- 8. A liquid jet recording head according to claim 1, wherein the average cross-sectional area of said conduit decreases with at least one step-decrease and without substantial increase, from said inlet to said outlet.
- 9. A liquid jet recording head according to claim 1, wherein the average cross-sectional area of the conduit decreases continuously from a point intermediate said inlet and said energy actuating region to a point intermediate said energy actuating region and said outlet.
Priority Claims (2)
Number |
Date |
Country |
Kind |
56-101029 |
Jun 1981 |
JPX |
|
56-101030 |
Jun 1981 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 737,578 filed May 24, 1985, which was a continuation of appln. of Ser. No. 386,876 filed June 10, 1982 all abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2543452 |
Mar 1977 |
DEX |
0073562 |
Jun 1980 |
JPX |
0100169 |
Jul 1980 |
JPX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
737578 |
May 1985 |
|
Parent |
386876 |
Jun 1982 |
|