US4048470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic printing head
Assignee: Suwa Seikosha KK
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Filing: 1975-09-23
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Granted: 1977-09-13
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Expires: 1995-09-23
Abstract
Abstract An exothermic type printing head is provided including a substrate, and electric conductors and exothermic elements mounted on the substrate. At least one common electric conductor is mounted on the substrate. Each common conductor has a plurality of branches extending therefrom. A corresponding plurality of discrete electrically conductive elements are also mounted on the substrate. Each of the electrically conductive elements is longitudinally arranged between a pair of branches extending from the common conductor. At least one integral exothermic element of predetermined width is mounted on the substrate overlying the discrete electrically conductive elements and branches of each common conductor. Signals are supplied to the common conductors from a common source.
Inventors
- 👤 Takemasa Shindo
- 👤 Kenichiro Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:28
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/345
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
An improved exothermic printing head for thermally recording a printing character on a thermally sensitive medium comprising a substrate, a first conductor means mounted on said substrate, said first conductor means including at least one pair of commonly referenced conductors, second conductor means mounted on said substrate and including a second conductor disposed intermediate each pair of commonly referenced first conductors, and exothermic means overlying each said first pair of conductors and second conductor disposed intermediate said pair of first conductors, said exothermic means being adapted to be activated to produce a pair of dots on said thermal sensitive medium in response to said second conductor means being referenced to a potential different than the potential at which said first pairs of conductors are commonly referenced.
Claim 2
Dependent Claim
126 words
An improved exothermic printing head for thermally recording a printing character on a thermally sensitive medium comprising a substrate, a first conductor means mounted on said substrate, said first conductor means including at least one pair of commonly referenced conductors, second conductor means mounted on said substrate and including a second conductor disposed intermediate each pair of commonly referenced first conductors, and exothermic means overlying each said first pair of conductors and second conductor disposed intermediate said pair of first conductors, said exothermic means being adapted to be activated to produce a pair of dots on said thermal sensitive medium in response to said second conductor means being referenced to a potential different than the potential at which said first pairs of conductors are commonly referenced.
Claim 3
Dependent Claim
36 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 6, wherein said first conductor means includes at least two pairs of longitudinally arranged conductors.
Claim 4
Dependent Claim
53 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 2, wherein the ends of said commonly referenced pairs of first conductors extend to a point beyond that of the ends of said second conductors disposed intermediate each pair of first conductors.
Claim 5
Dependent Claim
50 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 3, wherein the width of said exothermic means is less than the distance between the ends of said pairs of first conductors and the ends of said second conductors.
Claim 6
Dependent Claim
65 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 2, wherein said longitudinally arranged first pairs of conductors extend in parallel with respect to each other, said first pairs of conductors and said second conductors disposed intermediate said first pairs of conductors being arranged on said substrate to extend oppositely toward each other.
Claim 7
Dependent Claim
43 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 2, wherein said second conductors are substantially equally spaced from each of said first conductors defining each of said first conductor pairs.
Claim 8
Dependent Claim
50 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 2, wherein said exothermic means has a length greater than the distance between the furthest most spaced apart conductors of said respective pairs of first commonly referenced conductor pairs.
Claim 9
Dependent Claim
68 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 1, wherein said exothermic means define bars of a seven bar display and wherein each of said pairs of said commonly referenced first conductors define end points of each said bar and wherein said second conductors are electrically coupled to said bars intermediate the end points thereof.
Claim 10
Dependent Claim
47 words
An improved exothermic type printing head for thermally recording a printing character on a thermally sensitive medium as claimed in claim 1, said second conductor means including at least one additional second conductor mounted externally of one of said pairs of said commonly referenced first conductor pairs.
References Cited (Backward Citations)
US3903393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |