US4063255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro erosion printing head
Assignee: International Business Machines Corp
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Filing: 1976-06-17
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Granted: 1977-12-13
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Expires: 1996-06-17
Abstract
Abstract Guiding electrodes are built into the printing head of an electro-erosion printer using metalized paper for the purposes of equalizing paper pressure upon the printing surface of the head and prevention of irregular abrasion of the writing styli thereby leading to an improvement in the uniformity of contact pressure such as to consequently enhance printing quality.
Inventors
- 👤 Dietrich Juergen Bahr
- 👤 Karl Heinz Burckardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:51
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/39; B41J2/395
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A printing head for electro-erosion printing upon a web carrying a metallic layer adapted for burnt out marking, or erosion, comprising in combination, a plurality of writing electrodes each insulated from the others all being in contact with said metallic covered web and plural blind guide electrodes insulated from each other and from all the writing electrodes whereby the blind guide electrodes are adapted to assume a relatively greater amount of wear than do the writing electrodes and to provide a uniform contact pressure of the metallic layered web upon the writing electrodes.
Claim 2
Dependent Claim
93 words
A printing head for electro-erosion printing upon a web carrying a metallic layer adapted for burnt out marking, or erosion, comprising in combination, a plurality of writing electrodes each insulated from the others all being in contact with said metallic covered web and plural blind guide electrodes insulated from each other and from all the writing electrodes whereby the blind guide electrodes are adapted to assume a relatively greater amount of wear than do the writing electrodes and to provide a uniform contact pressure of the metallic layered web upon the writing electrodes.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1, wherein cross-section area of the blind guide electrodes is 2 to 5 times the cross-sectional area of the writing electrodes.
Claim 4
Dependent Claim
21 words
Apparatus as claimed in claim 1, wherein said plurality of writing and blind guide electrodes are disposed along a single line.
Claim 5
Dependent Claim
23 words
Apparatus as claimed in claim 3, wherein said blind guide electrodes are placed at the extreme ends of said single line of electrodes.
Claim 6
Dependent Claim
30 words
Apparatus as claimed in claim 1, wherein said plurality of writing electrodes are disposed along plural lines and where each of said plural lines contains a single blind guide electrode.
Claim 7
Dependent Claim
23 words
Apparatus as claimed in claim 5, wherein said blind guide electrodes are alternately right and left on different adjacent lines of writing electrodes.
Claim 8
Dependent Claim
30 words
Apparatus as claimed in claim 6, wherein the positions writing electrodes of one line are offset with respect to the positions of the writing electrodes located along an adjacent line.
References Cited (Backward Citations)
CA709521A
Cited
US3161457A
Cited
US3683126A
Cited
US3971042A
Cited
US3911447A
Cited
US3955204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |