Ink-jet recording apparatus
Patent 4604633 Issued on August 5, 1986. Estimated Expiration Date: 
December 8, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 8, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3308303 Ink supply system and print head Ink supply system for an array of ink jet heads Fluid tank and device for detecting remaining fluid Ink printer equipped with an ink printing head and intermediate ink container disposed on a movable carriage Patent #: 4475116 InventorsApplicationNo. 06/559496 filed on 12/08/1983US Classes:347/7, Fluid content (e.g., moisture or solvent content, ink refilling, liquid level)250/231.19, Pressure-responsive light valves340/619, Optical sensor73/293With illuminationExaminersPrimary: Hartary, Joseph W.Attorney, Agent or FirmInternational ClassB41J 2/175 (20060101)Foreign Application Priority Data1982-12-08 JPAbstractAn ink-jet recording apparatus having a detecting means for detecting ink pressure or an ink-residual quantity in the ink supply. The detecting means has a light shielding means coupled to the flexible diaphragm of the ink supply so as to be movable responsive to deformation of the flexible diaphragm. An ink pressure variation of -5 to -10 cm H2 O results in a diaphragm displacement of 5 um/cm H2 O to 20 mm/cm H2 O. | |
