Patent US3870856A successfully refreshed from Google Patents.
US3870856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal printing head
Assignee: Rohm Co Ltd
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Filing: 1973-02-20
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Granted: 1975-03-11
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Expires: 1993-02-20
Abstract
Abstract A thermal printing head which comprises a block of an insulating material and a thermal printing multi-symbol unit provided on that surface of the block which is brought into contact with a sheet of thermally-sensitive recording paper or the like. The unit comprises a plurality of resistive elements each comprising a plurality of linear portions and so arranged that selective combination of the elements or portions thereof produces different symbols to be printed. A common lead connects one end of each of the resistive element linear portion to one terminal of a source of energy while different leads selectively connect the opposite ends of the linear portions to the opposite end of the source to effect selective heating of the linear portions to provide a desired symbol.
Inventors
- 👤 Hideo Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/345
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface of said body two of said heating elements being positioned to define a common junction therebetween and forming a first Lshaped heating element section, two other heating elements being positioned to define a common junction therebetween and forming a second L-shaped heating element section, and three additional heating elements being positioned to define a common junction therebetween and forming a T-shaped heating element section; first electrically conductive means for connecting in common a first portion of substantially all of said heating elements to the first terminal, wherein said first portion of said two heating elements is adjacent said common junction; and
Claim 2
Dependent Claim
148 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface of said body two of said heating elements being positioned to define a common junction therebetween and forming a first Lshaped heating element section, two other heating elements being positioned to define a common junction therebetween and forming a second L-shaped heating element section, and three additional heating elements being positioned to define a common junction therebetween and forming a T-shaped heating element section; first electrically conductive means for connecting in common a first portion of substantially all of said heating elements to the first terminal, wherein said first portion of said two heating elements is adjacent said common junction; and
Claim 3
Dependent Claim
148 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface of said body two of said heating elements being positioned to define a common junction therebetween and forming a first L-shaped heating element section, two other heating elements being positioned to define a common junction therebetween and forming a second L-shaped heating element section, and three additional heating elements being positioned to define a common junction therebetween and forming a T-shaped heating element section; first electrically conductive means for connecting in common a first portion of substantially all of said heating elements to the first terminal, wherein said first portion of said two heating elements is adjacent said common junction; and
Claim 4
Dependent Claim
148 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface of said body two of said heating elements being positioned to define a common junction therebetween and forming a first L-shaped heating element section, two other heating elements being positioned to define a common junction therebetween and forming a second L-shaped heating element section, and three additional heating elements being positioned to define a common junction therebetween and forming a T-shaped heating element section; first electrically conductive means for connecting in common a first portion of substantially all of said heating elements to the first terminal, wherein said first portion of said two heating elements is adjacent said common junction; and
Claim 5
Dependent Claim
11 words
An apparatus of claim 1, wherein said heating elements are elongated.
Claim 6
Dependent Claim
19 words
An apparatus of claim 1, wherein said first and second electrically conductive means are positioned on said first surface.
Claim 7
Dependent Claim
24 words
An apparatus of claim 1, wherein said plurality of heating elements are positioned on said surface substantially in the form of a figure 8.
Claim 8
Dependent Claim
15 words
An apparatus of claim 1, wherein said heating elements are at least 30 microns thick.
Claim 9
Dependent Claim
31 words
An apparatus of claim 1, wherein said plurality of heating elements defines a multi-symbol unit, and wherein said printing head includes a plurality of said multi-symbol units arranged on said body.
Claim 10
Dependent Claim
23 words
An apparatus of claim 3, wherein said first and second electrically conducting means are made of the same material as said heating elements.
Claim 11
Dependent Claim
21 words
An apparatus of claim 1, wherein said first and second electrically connecting means are elongated, and narrower than said heating elements.
Claim 12
Dependent Claim
111 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface, each heating element composed of a thick film substantially at least 30 microns thick; means for coupling first and second portions of selected heating elements to the first and second terminals, respectively, said first and second portions of each selected heating element defining element segments therebetween, said element segments being heated by said source of electrical energy to actuate the adjacent thermally sensitive paper.
Claim 13
Dependent Claim
111 words
A thermal printing head, coupled to a source of electrical energy having first and second terminals, for printing by actuation adjacent thermally sensitive paper, comprising: a body having a first surface composed primarily of electrically insulating material; a plurality of heating elements positioned on said first surface, each heating element composed of a thick film substantially at least 30 microns thick; means for coupling first and second portions of selected heating elements to the first and second terminals, respectively, said first and second portions of each selected heating element defining element segments therebetween, said element segments being heated by said source of electrical energy to actuate the adjacent thermally sensitive paper.
Claim 14
Dependent Claim
22 words
An apparatus of claim 9, wherein said thick film is applied to said first surface in the form of a resistive paste.
Claim 15
Dependent Claim
21 words
An apparatus of claim 9, wherein said coupling means is composed of primarily the same material as is said heating elements.
Claim 16
Dependent Claim
21 words
An apparatus of claim 9, wherein said coupling means is composed of a thick film substantially at least 30 microns thick.
Claim 17
Dependent Claim
18 words
An apparatus of claim 9, wherein said heating elements are positioned in the form of the numeral 8.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |