US3684858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printing head
Assignee: Individual
•
Filing: 1971-06-23
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Granted: 1972-08-15
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Expires: 1991-06-23
Abstract
Abstract A thermal printing head comprises a vitreous plate through which a plurality of wires extend, the forward face, including the free extremities of the wires, constituting a planar continuum, and a plurality of vapor deposited sections selectively extending between selected free extremities of wires. The arrangement is such that the thermal coefficient of expansion of the wires and the vitreous plate are alike so that permanent integration of the wires and the plate is effected and bonding of the wires to the vapor deposited sections is assured.
Inventors
- 👤 Iwar H Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:10
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/335; B41J2/33505; B41J2/3351; B41J2/33515; B41J2/33525; B41J2/3353; B41J2/33545; B41J2/3355; B41J2/33555; B41J2/3357; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A thermal print head comprising a vitreous plate, electrical leads extending through said plate from a rear face to a front face, said front face including the free extremities of said electrical leads and the surrounding regions of said vitreOus plate disposed in a planar continuum, and a vapor deposited pattern on said front face composed of a metal containing, as its characteristic ingredient, a member selected from the class consisting of chromium and tantalum, said pattern including resistive elements of waveform configuration and conductive elements of solid configuration, selected ones of said resistive elements being connected between selected pairs of said conductive elements.
Claim 2
Dependent Claim
104 words
A thermal print head comprising a vitreous plate, electrical leads extending through said plate from a rear face to a front face, said front face including the free extremities of said electrical leads and the surrounding regions of said vitreOus plate disposed in a planar continuum, and a vapor deposited pattern on said front face composed of a metal containing, as its characteristic ingredient, a member selected from the class consisting of chromium and tantalum, said pattern including resistive elements of waveform configuration and conductive elements of solid configuration, selected ones of said resistive elements being connected between selected pairs of said conductive elements.
Claim 3
Dependent Claim
35 words
The thermal print head of claim 1 wherein said plate is composed of glass and said leads are composed of a nickel-iron alloy, said glass and said alloy having the same thermal coefficient of expansion.
Claim 4
Dependent Claim
29 words
The thermal print head of claim 1 wherein said free extremities of said selected ones of said electrical leads are in contact with selected ones of said conductive elements.
Claim 5
Dependent Claim
25 words
The thermal print head of claim 1 wherein the thickness of said resistive elements and said conductive elements ranges from 500 to 10,000 angstrom units.
Claim 6
Dependent Claim
36 words
The thermal print head of claim 1 wherein said resistive elements are eight in number and generally discrete from each other, being arranged in the form of a figure 8, together with a succeeding decimal point.
Claim 7
Dependent Claim
18 words
The thermal print head of claim 1 wherein certain of said conductive elements generally surround said resistive elements.
Claim 8
Dependent Claim
20 words
The thermal print head of claim 1 wherein certain of said conductive elements generally are surrounded by said resistive elements.
Claim 9
Dependent Claim
198 words
A thermal print head comprising a vitreous plate, electrical leads extending through said plate from a rear face to a front face, said front face including the free extremities of said electrical leads and the surrounding regions of said vitreous plate disposed in a planar continuum, and a vapor deposited pattern on said front face composed of a metal containing, as its characteristic ingredient, a member selected from the class consisting of chromium and tantalum, said pattern including resistive elements of waveform configuration and conductive elements of solid configuration, selected ones of said resistive elements being connected between selected pairs of said conductive elements, said plate being composed of glass and said leads being composed, of a nickel-iron alloy, said glass and said alloy having the same thermal coefficient of expansion, said free extremities of said selected ones of said electrical leads being in contact with selected ones of said conductive elements, the thickness of said resistive elements and said conductive elements ranges from 500 to 10,000 angstrom units, said resistive elements being eight in number, being generally discrete from each other and being arranged in the form of a figure 8, together with a succeeding decimal point.
Claim 10
Dependent Claim
198 words
A thermal print head comprising a vitreous plate, electrical leads extending through said plate from a rear face to a front face, said front face including the free extremities of said electrical leads and the surrounding regions of said vitreous plate disposed in a planar continuum, and a vapor deposited pattern on said front face composed of a metal containing, as its characteristic ingredient, a member selected from the class consisting of chromium and tantalum, said pattern including resistive elements of waveform configuration and conductive elements of solid configuration, selected ones of said resistive elements being connected between selected pairs of said conductive elements, said plate being composed of glass and said leads being composed, of a nickel-iron alloy, said glass and said alloy having the same thermal coefficient of expansion, said free extremities of said selected ones of said electrical leads being in contact with selected ones of said conductive elements, the thickness of said resistive elements and said conductive elements ranges from 500 to 10,000 angstrom units, said resistive elements being eight in number, being generally discrete from each other and being arranged in the form of a figure 8, together with a succeeding decimal point.
Claim 11
Dependent Claim
18 words
The thermal print head of claim 8 wherein certain of said conductive elements generally surround said resistive elements.
Claim 12
Dependent Claim
20 words
The thermal print head of claim 8 wherein certain of said conductive elements generally are surrounded by said resistive elements.
References Cited (Backward Citations)
US3026501A
Cited
US3161457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |