US4559542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printing head
Assignee: Fujifilm Business Innovation Corp
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Filing: 1983-06-02
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Granted: 1985-12-17
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Expires: 2003-06-02
Abstract
Abstract A thermal printing head for multi-tone reproduction includes a plurality of heating resistors disposed along the scanning line which differ in the magnitude of thermal output upon energization thereof by the same electric current for an identical time period. This effect is achieved by differing the heating area or by differing resistivity of each heating resistors. Selective energization of none, one or more of the heating surfaces enables the reproduction of different tones or colors on the thermo sensitive paper.
Inventors
- 👤 Tsunemasa Mita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/345; B41J2/35; B41J2/355; B41J2/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A thermal printing head for multi-tone or multicolor image reproduction comprising: a plurality of heating resistors disposed closely to each other along a path parallel to the direction of scanning, each of said plurality of heating resistors having different heating characteristics and being divided into a plurality of heating elements; and electricity supplying means for selectively and individually supplying electricity to any combination of said heating elements of said heating resistors so as to provide any desired combination of heat states of said heating element.
Claim 2
Dependent Claim
85 words
A thermal printing head for multi-tone or multicolor image reproduction comprising: a plurality of heating resistors disposed closely to each other along a path parallel to the direction of scanning, each of said plurality of heating resistors having different heating characteristics and being divided into a plurality of heating elements; and electricity supplying means for selectively and individually supplying electricity to any combination of said heating elements of said heating resistors so as to provide any desired combination of heat states of said heating element.
Claim 3
Dependent Claim
30 words
A thermal printing head as set forth in claim 1 wherein said plurality of heating elements of different heating resistors have areas different from those of the other heating resistor.
Claim 4
Dependent Claim
20 words
A thermal printing head as set forth in claim 1 wherein said heating resistors have resistivity different from one another.
Claim 5
Dependent Claim
93 words
A thermal printing head as in claim 2 wherein said elements in each of the heating resistors are disposed in a line perpendicular to the direction of scanning and wherein said electricity supplying means comprises a first plurality of electrodes which contact one of said heating resistors, a second plurality of electrodes which contact the other of said heating resistors and a third plurality of electrodes which contact both of said heating resistors the contact between all of said electrodes and said heating resistors occurs between adjacent elements in each respective heating resistor.
Claim 6
Dependent Claim
29 words
A thermal printing head as in claim 4, wherein the contact between all of said electrodes and said heating resistors occurs between adjacent elements in each respective heating resistor.
Claim 7
Dependent Claim
43 words
A thermal printing head as in claim 4, wherein that portion of the electrodes contacting one of said heating resistors is of a first width and that portion of said electrodes contacting the other of said heating resistors is of a different width.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |