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:
Nov. 17, 1987
Filed:
Jun. 25, 1986
Manfred Rosenthal, Kirchen-Freusburg, DE;
Jan Roulaux, Kirchen-Freusburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a covering device for protecting the nozzle area of an ink jet writing head, which device is detachably connected to the ink jet writing head in a sealing manner and forms a cavity which is opened towards the nozzles, into which cavity liquid ink is transported through the nozzles. In order to be able to store and transport an ink jet writing head filled with liquid ink for a long period of time, in particular also as an individual component, for example as a spare part, without the possibility existing the liquid ink of drying in the nozzle area and without enclosed or penetrating air bubbles that can lead to a chemical change of the liquid ink, it is ensured that the covering device (7) is form-coupled to the ink jet writing head (1) and that the cavity (8) comprises a closable ventilation duct (12) which communicates with the atmosphere.