The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1985
Filed:
Jul. 05, 1983
Luke Volpe, Melrose, MA (US);
Lowell E Thomas, Tewksbury, MA (US);
Dynamics Research Corporation, Wilmington, MA (US);
Abstract
A large-scale printhead is made up of rows of styli patterned onto thin glass substrates sandwiched together between rugged support substrates, in which a series of thin glass substrate sections are internally butted one to the other. Fabrication of multiple rows of elements is accomplished by stacking the delicate styli-bearing substrates on an associated rugged substrate. In a preferred embodiment, all glass substrates are utilized, with the transparency of the glass permitting accurate alignment of the styli or nibs. The use of glass substrates also increases the wear resistance of the completed printhead. A specialized bus matrix permits reduction in the width of the substrates carrying the styli, with the bus structure being formed on a single side of the substrate carrying the styli, such that thru-holes need not be provided through the thin substrates. A staggered, offset, oppositely facing contact pad structure is provided at the base of styli-bearing substrates to accommodate multiple rows of printing elements.