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US 4,063,255 AGranted
Electro erosion printing head
AssigneeInternational Business Machines Corporation
InventorsDietrich Juergen Bahr, Karl Heinz Burckardt
Life of this patent
Estimating the term…
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.
Claims7
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.
Dependencies are inferred from the claim text.