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US 11,993,071 B2Granted
Ink dispensing system using pressure
AssigneeBobst Firenze S.R.L.
InventorsFederico D'Annunzio, Antonio Bellosi, Andrea Melchiorri
Life of this patent
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Abstract
This document discloses a system to dispense a precise and continuous amount of ink for a large printing press. The dispensing system can be judiciously combined into a more elaborate dispensing system that uses two chambers with ink having a different density to dispense ink with a precise, adjustable and stable ink density. The dispensing system can be used to compensate the drifts in quality observed in presses when the speed, or any environmentable parameters vary.
Claims20
An ink dispensing system comprising
- a first chamber configured to hold a first ink under pressure;
- a first ink channel connecting an output of the first chamber to a first input of a mixing valve, the first ink channel capable of providing the first ink to the mixing valve from only the first chamber;
- a first pressure source configured to deliver air with adjustable pressure to the first chamber;
- a first sensor configured to measure an amount or a flow of the first ink;
- and
- a control system functionally connected to the first pressure source and to the first sensor, wherein the control system is configured to (1) control the amount of an output ink output by the ink dispensing system by adjusting a pressure value of the first pressure source to a first pressure configured to flow the first ink and a second pressure configured to flow the first ink, and (2) control a composition of the output ink by adjusting the mixing valve to control the amount of the first ink extracted from the first ink channel relative to the amount of a second ink separately input to the mixing valve.
3 more elements
An ink dispensing system comprising:
- a first chamber configured to hold a first ink under pressure;
- a mixing valve having a first input and a second input;
- a first ink channel connecting an output of the first chamber to the first input to provide the first ink to the first input from only the first chamber;
- a first pressure source configured to deliver air with adjustable pressure to the first chamber;
- a first flow sensor configured to measure a flow of the first ink, the first flow sensor positioned downstream of the first chamber;
- and
- a control system functionally connected to the first pressure source, the mixing valve, and the first sensor, wherein the control system is configured to (1) control an amount of an output ink output by the ink dispensing system by adjusting a pressure value to a first pressure sufficient to cause the first to flower and a second pressure sufficient to cause the first ink to flow, and (2) control a composition of the output ink output by the ink dispensing system by adjusting the mixing valve to control the amount of the first ink extracted from the first ink channel relative to the amount of a second ink separately input to the mixing valve.
4 more elements
An ink dispensing system comprising:
- a first chamber configured to hold a first ink under pressure;
- a second chamber configured to hold a second ink under pressure;
- a mixing valve at a junction;
- a first ink channel connecting an output of the first chamber to a first input of the mixing valve at the junction, and a second ink channel connecting an output of the second chamber to a second input of the mixing valve at the junction, so that the mixing valve receives only the first ink at the first input and only the second ink at the second input;
- a first pressure source configured to deliver a gas with adjustable pressure to the first chamber and the second chamber;
- a first sensor configured to measure an amount or a flow of the first ink;
- a second sensor configured to measure an amount or a flow of the second ink;
- and
- a control system functionally connected to the first pressure source, the first sensor, the second sensor, and the mixing valve, wherein the control system is configured to control a composition of combined ink output by the ink dispensing system by adjusting the mixing valve to control the amount of the first ink relative to the amount of the second ink extracted from the first ink channel and the second ink channel, respectively.
6 more elements
Dependencies are inferred from the claim text.