PATENT CLAIM ANALYSIS

Application Number: 16111937
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2018-12
Patent Classification: ["347", "019000"]

Abstract:
In a method for detecting a disturbance in an ejection unit of an inkjet print head, the ejection unit of the inkjet print head includes a pressure chamber for holding an amount of liquid and is in fluid communication with a nozzle orifice; and an actuator operatively coupled to the pressure chamber for generating a pressure wave in the liquid in the pressure chamber for ejecting a droplet of the liquid through the nozzle orifice upon application of a droplet ejection pulse. The method determining at least one resonance frequency of the pressure chamber; determining a disturbance detection pulse for generating a pressure wave in the liquid in the pressure chamber taking into account the resonance frequencies previously determined, wherein the disturbance detection pulse has a frequency spectrum different from a frequency spectrum of the droplet ejection pulse; detecting a residual pressure wave in the liquid in the pressure chamber; and analyzing the residual pressure wave previously detected for determining whether a disturbance for droplet ejection is present in the ejection unit. With this method, disturbances in the ejection unit may be derived from the residual pressure wave more reliably and easier.

Claim (Index 8):
An inkjet printer comprising an inkjet print head and a control unit operatively coupled to the inkjet print head for controlling operation of the inkjet print head, the inkjet print head comprising an ejection unit, wherein the ejection unit comprises:\n a pressure chamber for holding an amount of liquid, said pressure chamber being in fluid communication with a nozzle orifice; and an actuator operatively coupled to the pressure chamber for generating a pressure wave in the liquid in the pressure chamber for ejecting a droplet of the liquid through the nozzle orifice upon application of a droplet ejection pulse, wherein the control unit is configured to supply the droplet ejection pulse to the inkjet print head for controlling the inkjet print head to expel a droplet of liquid through the nozzle orifice, and wherein the control unit is configured to supply a disturbance detection pulse, then to detect a residual pressure wave in the pressure chamber and to analyze the residual pressure wave for determining whether a disturbance is present in the ejection unit of the inkjet print head, the disturbance detection pulse being determined by taking into account at least one resonance frequency of the pressure chamber and having a frequency spectrum different from a frequency spectrum of the droplet ejection pulse.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 96.0
- Lexical Diversity: 2.65789
- Patent Class: 347.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15643212', '15493960', '13035552', '14306397', '13635747']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7667603237568275
- 35 USC 102 Novelty (BERT): 0.4910867759308522
- Combined Prediction Score: 0.7391929689742299
- Mean Citation Score: 258.803998
- Max Citation Score: 286.13684
- Similarity Product: 261.730502134099

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test