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. 15, 2000
Filed:
Aug. 13, 1999
Ralph Papenfuhs, Gerolsbach, DE;
Manuela Rau, Nurnberg, DE;
J.S. Staedtler GmbH & Co., Nurnberg, DE;
Abstract
An ink cartridge with a closing device for ink jet printers or similar writing, printing or drawing units, wherein the ink cartridge in the printer as well as the closing device are releasably mounted on the ink cartridge, wherein the ink cartridge can be filled manually or automatically with ink from an external tank, wherein the ink cartridge includes at least one housing, an ink reservoir and a refill opening, and wherein the refill opening is closeable by the closing device. The closing device includes at least two different closing elements, wherein a first element provides a sealing action and is a plug or a closing cap and a second element is constructed as an air-permeable compensating cap and includes a compensating body which is in the condition of use impregnated with a writing agent, a surface-active agent or tenside, with water, organic solvent or another liquid, wherein the closing elements or caps can be exchanged against each other and/or can be connected to each other and can be mounted on the ink cartridge and/or on each other.