In this day and age, we all use printers. Sure, the majority of work is done on computers, and even stays on computers, but nothing will change that feeling of physical paper in hand. Despite green trends and advances in technology, it is likely that documents will continue to be hard copied and printed on a regular basis. Queue Ichiro Endo. Working for Canon Kabushiki Kaisha, back in 1988, Mr. Endo revolutionized the way we print documents. By patenting a bubble jet recording method in which the ink is heated to create bubbles, he was able to improve the quality and efficiency of printing significantly. While several methods of printing exist and are used today, the impact of Mr. Endo’s invention was revolutionary for his time, and it is still used often today.
MyPatentAssets Dashboard for Patent #4,723,129:
Looking at the MyPatentAssets dashboard, we can see that patent #4,723,129 has a Patent Rank of 80.
About Patent #4,723,129:
A liquid jet recording process comprises the step of providing a continuous passageway defining a path through which liquid can flow. The passageway has an inlet thereto and an outlet orifice therefrom and further defines a thermal chamber portion located directly in the path intermediate the inlet and the outlet orifice and spaced upstream from the outlet orifice. Liquid is supplied to the passageway to fill it and an input signal is generated each time it is desired to produce a liquid droplet. The liquid in the thermal chamber portion is heated in response to each input signal and heating is sufficient instantaneously to cause a change of state of the liquid in the thermal portion chamber sufficient to produce a force acting on liquid filling the passageway between the thermal chamber portion and the orifice that overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. After projection of the droplet of liquid and with attenuation of the change of state and the force produced thereby, the liquid chamber portion is replenished with liquid.
In Layman’s Terms:
In the thermal inkjet process, the print cartridges contain a series of tiny chambers, each containing a heater, all of which are constructed by photolithography – a process that uses light to transfer images onto paper. To eject a droplet from each chamber, a pulse of current is passed through the heating element causing a rapid vaporization of the ink in the chamber to form a bubble, which causes a large pressure increase, propelling a droplet of ink onto the paper.
Based on the MyPatentAssets analysis and our own personal research and evaluation, we conclude that patent #4,723,129 hold significant value.