Level sensor for ink bag
Patent 4935751 Issued on June 19, 1990. Estimated Expiration Date: 
September 21, 2009. 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.
September 21, 2009. 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 ReferencesInk-jet recording apparatus Flexible collapsible container with liquid level indicating device Patent #: 4639251 InventorApplicationNo. 410771 filed on 09/21/1989US Classes:347/86, Cartridge116/227, Liquid level347/7Fluid content (e.g., moisture or solvent content, ink refilling, liquid level)ExaminersPrimary: Miller, George H. Jr.Attorney, Agent or FirmInternational ClassesG01D 018/00G01F 023/00 AbstractAn ink device (1) having means for determining the amount of ink remaining in an ink bag comprises a rigid, rectangular box (3) which has a window (29) in the top (13), a collapsible ink bag (23) in the container, one side of the ink bag being secured (33) to the corresponding side (9) of the container and the opposite side of the ink bag having a rigid plate or strip (19) secured to its lower half so that the top edge (21) of the plate is visible through the window. The container and the ink bag have cooperating means (17, 29) to allow ink (35) to flow into or out of the ink bag.Field of SearchLiquid level | |
