Aerosol removal

Patent metadata

Field	Value
Publication number	US-12343669-B2
Application number	US-201917772227-A
Country	US
Kind code	B2
Filing date	Nov 19, 2019
Priority date	Nov 19, 2019
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

The present disclosure relates to methods and devices for removing an aerosol generated during a printing process. In an example there is disclosed a device which may comprise an air suction device, an air flow baffle, an aerosol absorber, and a droplet filter. The air suction device may draw air away from an area around a printhead nozzle, past the air flow baffle, through the droplet filter, towards the air suction device. The air flow baffle may cause a change in air flow direction such that at least some aerosol droplets contact the aerosol absorber.

First claim

The invention claimed is:

1. A device comprising:
an air suction device;
an air flow baffle;
an aerosol absorber;
a droplet filter;
an air inlet, positioned, along the air flow direction, between a printhead nozzle and the aerosol absorber; and
an aerosol droplet channel, extending between the air inlet and the aerosol absorber, to collect aerosol droplets deposited thereon and direct the aerosol droplets towards the aerosol absorber; wherein the air suction device is to draw air away from an area around the printhead nozzle, past the air flow baffle, through the droplet filter, towards the air suction device, and the air flow baffle is to cause a change in air flow direction such that at least some aerosol droplets contact the aerosol absorber.

2. The device of claim 1 , wherein the aerosol absorber is removable from the device.

3. The device of claim 1 , wherein the droplet filter is removable from the device.

4. The device of claim 1 , wherein the air suction device is to create an air flow speed past the printhead nozzle of approximately 1-3 m/s.

5. The device of claim 1 , wherein the air suction device is to create a region of reduced pressure between the air suction device and the droplet filter.

6. The device of claim 1 , wherein the air flow baffle includes a film to inhibit adherence of aerosol droplets to the air flow baffle.

7. A method for removing an aerosol generated during a printing process, the method comprising:
drawing air, with aerosol droplets suspended therein, away from a printhead nozzle, towards an air flow turbulence inducer causing a change in air flow direction and turbulence in air flow, such that at least some aerosol droplets contact an aerosol absorber, and through a filter for filtering aerosol droplets from the air.

8. The method of claim 7 , wherein the air is drawn at an air flow speed approximately 1-3 m/s, to create substantially laminar air flow around the printhead nozzle.

9. The method of claim 7 , wherein the air is drawn over an aerosol droplet groove, so that at least some aerosol droplets are deposited in the aerosol droplet groove.

10. The method of claim 7 , wherein the air is drawn by creating a region of reduced pressure between an air suction device and the filter.

11. A method for removing an aerosol generated during a printing process, the method comprising:
positioning an obstacle, an aerosol absorber, and a filter between a printhead nozzle and an air suction device; and
drawing air away from the printhead nozzle such that the air is directed towards the obstacle, past the aerosol absorber, and through the filter before reaching the air suction device, wherein the obstacle changes a direction of air flow such that at least some aerosol droplets are prevented from following the air flow path.

12. The method of claim 11 , wherein the air is drawn away from the printhead nozzle in a substantially laminar air flow.

13. The method of claim 11 , wherein the air is drawn by creating a region of reduced pressure between the air suction device and the filter.

Assignees

• Hewlett Packard Development Co
• Idneo Tech S A U

Inventors

• Llorach To Marcel
• Albert Gine Jordi
• Vandenbergh Kurt

Classifications

• B41J2/16517

  Cleaning of print head nozzles (B41J2/16505, B41J2/1707 take precedence) · CPC title

• B01D2279/00

  Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses · CPC title

• B01D2273/28

  Making use of vacuum or underpressure · CPC title

• B01D46/10

  Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces · CPC title

• B01D46/0031

  with collecting, draining means · CPC title