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:
Apr. 16, 2019
Filed:
Dec. 07, 2017
Océ Holding B.v., Venlo, NL;
OCÉ HOLDING B.V., Venlo, NL;
Abstract
An ink handling system for an ink jet printer includes a local ink reservoir associated with a print head assembly of the printer, a fill state sensor arranged to detect a fill state of the local ink reservoir, a pump arranged to supply ink into the local ink reservoir, and a pump controller for controlling an operation of the pump, including controlling an on/off state of the pump, on the basis of a detection result of the fill state sensor. A pump calibration system includes an ink consumption measurement system including a droplet counter for counting a number of ink droplets jetted out by the print head assembly and arranged to calculate a volume V of consumed ink on the basis of the counted number of droplets; a timer for counting an on-time T of the pump; a flow rate calculator arranged to calculate an measured ink flow rate of the pump on the basis of the ratio V/T; and a flow rate drift compensation functionality in the pump controller, the compensation functionality being configured to control the operation of the pump on the basis of the measured ink flow rate.