US 5666142

Patent Overview — US 5,666,142 A

Title: "Ink jet recording system having improved functional devices for driving energy generating members"

Patent number: US 5,666,142 A
Application number: US 08/255,899
Assignee: Canon Inc. (original assignee; listed current assignee)
Inventors: Kei Fujita, Asao Saito, Shigeyuki Matsumoto
Filing date: 1994-06-07
Publication (grant) date: 1997-09-09
Priority date (as listed): 1990-01-31
Legal status (as listed): Expired – Lifetime; anticipated expiration 2014-09-09
Source: https://patents.google.com/patent/US5666142/en

Purpose and plain-language scope (from the supplied excerpt):
The patent concerns an ink jet recording system in which improved "functional devices" drive energy-generating members. In simpler terms, it relates to the electrical/structural elements that power the components that eject ink, and to how those elements are arranged and formed in the print head. The excerpt associates the disclosure with bubble jet print heads, including "edge shooter" types, and with nozzle production techniques such as bonding, dry and wet etching, photolithography, molding, thin-film formation, and CVD. Prior-art keyword listings point to an "ink region," "impurity concentration," a "substrate plate," and the "functional devices" themselves, suggesting the technology addresses ink channel regions, substrate structure, and impurity (doping) levels in the drive circuitry. The classification applied is B41J2/16 (production of nozzles), including subclasses for bubble jet print heads, edge shooter print heads, and their manufacture.

What the supplied excerpt does not establish:
The excerpt contains only bibliographic data, classification codes, images placeholders, and prior-art keywords. It does not include the claims, the written description, an abstract, or the drawing descriptions. Therefore the excerpt does not establish the specific claimed structure, the precise relationship between impurity concentration and device function, any measured performance benefit, the embodiments described, or any comparison to prior art. Nothing here establishes litigation, ownership transfers, validity, or enforceability, and no such findings are offered.