US4336548A
Expired / Lapsed
US
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Droplets forming device
Assignee: Canon Inc
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Filing: 1980-06-24
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Granted: 1982-06-22
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Expires: 2000-06-24
Abstract
Abstract A droplets forming device of a construction wherein a body of liquid to be introduced into a chamber connected with liquid droplets discharging orifice is heated at a heat generating section provided on a part of the chamber, and the thus heated body of liquid is discharged from the orifice in the form of droplets, and in which the surface in contact with the liquid at this heat generating section is made to have surface coarseness of from 0.05S to 2S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Inventors
- 👤 Shigeyuki Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:58
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14088; B41J2/14112; B41J2/14129; B41J2002/14379; B41J2202/00; B41J2202/01; B41J2202/11
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
120 words
A droplets forming device comprising means defining a chamber into which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including at least a heat generating resistive body and a barrier layer to isolate said resistive body from the liquid in said chamber, and wherein the surface of said barrier layer in contact with the liquid has a surface coarseness of from 0.05 S to 2 S measured in accordance with Japanese Industrial Standard JIS B 0601.
Claim 2
Dependent Claim
120 words
A droplets forming device comprising means defining a chamber into which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including at least a heat generating resistive body and a barrier layer to isolate said resistive body from the liquid in said chamber, and wherein the surface of said barrier layer in contact with the liquid has a surface coarseness of from 0.05 S to 2 S measured in accordance with Japanese Industrial Standard JIS B 0601.
Claim 3
Dependent Claim
23 words
The droplets forming device according to claim 1, wherein said heat generating resistive body is a film formed by the vacuum deposition method.
Claim 4
Dependent Claim
28 words
The droplets forming device according to claim 1, wherein said heat generating resistive body has a film thickness in a range of from 1,000 A to 4,000 A.
Claim 5
Dependent Claim
23 words
The droplets forming device according to claim 1, wherein said barrier layer has a film thickness of from 0.1 μm to 5 μm.
Claim 6
Dependent Claim
18 words
The droplets forming device according to claim 1, wherein the top surface of said barrier layer is coarsened.
Claim 7
Dependent Claim
17 words
The droplets forming device according to claim 1, wherein said barrier layer consists of an inorganic substance.
Claim 8
Dependent Claim
45 words
The droplets forming device according to claim 1, wherein said barrier layer includes a film made of a material selected from the group consisting of SiO 2 , MgO, Al 2 O 3 , Ta 2 O 5 , TiO 2 and ZrO 2 .
Claim 9
Dependent Claim
17 words
The droplets forming device according to claim 1, wherein said barrier layer is in a laminated structure.
Claim 10
Dependent Claim
25 words
The droplets forming device according to claim 1, wherein said barrier layer is laminated on said heat generating resistive body at said heat generating means.
Claim 11
Dependent Claim
41 words
The droplets forming device according to claim 1, wherein said heat generating section is provided on a base plate having a surface coarseness of from 0.1 S to 5 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 12
Dependent Claim
109 words
A droplets forming device comprising means defining a chamber into which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including a lamination of a plurality of films formed by vacuum deposition, and wherein the surface of the film in contact with the liquid has a surface coarseness of from 0.05 S to 2 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 13
Dependent Claim
109 words
A droplets forming device comprising means defining a chamber into which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including a lamination of a plurality of films formed by vacuum deposition, and wherein the surface of the film in contact with the liquid has a surface coarseness of from 0.05 S to 2 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 14
Dependent Claim
35 words
The droplets forming device according to claim 11, wherein said heat generating means has a heat generating resistive body layer and a barrier layer to isolate said heat generating resistive body layer from the liquid.
Claim 15
Dependent Claim
40 words
The droplets forming device according to claim 11, wherein said heat generating means is provided on a base plate having a surface coarseness of from 0.1 S to 5 S in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 16
Dependent Claim
26 words
The droplets forming device according to claim 12, wherein said heat generating resistive body layer has a film thickness of from 1,000 A to 4,000 A.
Claim 17
Dependent Claim
23 words
The droplets forming device according to claim 12, wherein said barrier layer has a film thickness of from 0.1 μm to 5 μm.
Claim 18
Dependent Claim
17 words
The droplets forming device according to claim 12, wherein said barrier layer consists of an inorganic substance.
Claim 19
Dependent Claim
44 words
The droplets forming device according to claim 12, wherein said barrier layer includes a film made of a material selected from group consisting of SiO 2 , MgO, Al 2 O 3 , Ta 2 O 5 , TiO 2 , ZrO 2 .
Claim 20
Dependent Claim
102 words
A droplets forming device comprising means defining a chamber in which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including a heat generating resistive body layer formed on a base plate, and wherein said base plate has a surface coarseness of from 0.1 S to 5 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 21
Dependent Claim
102 words
A droplets forming device comprising means defining a chamber in which a liquid is introduced, said chamber being in communication with a liquid droplets discharging orifice, and heat generating means provided in a surface of said chamber defining means for heating the liquid so that the thus heated liquid is discharged from the orifice in the form of droplets, said heat generating means including a heat generating resistive body layer formed on a base plate, and wherein said base plate has a surface coarseness of from 0.1 S to 5 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 22
Dependent Claim
18 words
The droplets forming device according to claim 18, wherein said base plate consists of a sintered polycrystalline body.
Claim 23
Dependent Claim
30 words
The droplets forming device according to claim 18, wherein said base plate is made of metals, molten quartz, or sapphire, the surface of which has been subjected to coarsening treatment.
Claim 24
Dependent Claim
23 words
The droplets forming device according to claim 18, wherein said heat generating resistive body layer consists of a film formed by vacuum deposition.
Claim 25
Dependent Claim
26 words
The droplets forming device according to claim 18, wherein said heat generating resistive body layer has a film thickness of from 1,000 A to 4,000 A.
Claim 26
Dependent Claim
39 words
The droplets forming device according to claim 18, wherein the outer surface of said heat generating means has a surface coarseness of from 0.05 S to 2 S measured in accordance with the Japanese Industrial Standard JIS B 0601.
Claim 27
Dependent Claim
37 words
The droplets forming device according to claim 18, wherein said heat generating resistive body layer is covered with a barrier layer consisting of an inorganic substance to isolate the heat generating resistive body layer from the liquid.
Claim 28
Dependent Claim
19 words
The droplets forming device according to claim 24, wherein said barrier layer is a film formed by vacuum deposition.
Claim 29
Dependent Claim
29 words
The droplets forming device according to claim 18, wherein a heat accumulating layer is interposed between the surface of said base plate and said heat generating resistive body layer.
Claim 30
Dependent Claim
23 words
The droplets forming device according to claim 26, wherein said heat accumulating layer has a thickness of from 0.01 μm to 50 μm.
References Cited (Backward Citations)
US4243994A
Cited
US4251824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |