Selective primer removal

Patent metadata

Field	Value
Publication number	US-11215947-B2
Application number	US-201716603801-A
Country	US
Kind code	B2
Filing date	Apr 18, 2017
Priority date	Apr 18, 2017
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

In one example, an apparatus for selectively removing primer in a printing system is described, having a chamber for supply of a pressurised fluid, a plurality of valves fluidically coupled to the chamber and individually pivotable about a common elongate member that extends along a length of the apparatus, and a set of actuators to pivot the plurality of valves about the elongate member to selectively supply pressurised fluid from the chamber along the length of the apparatus.

First claim

What is claimed is:

1. Apparatus for selectively removing primer in a printing system comprising:
a chamber for supply of a pressurized fluid;
a plurality of valves fluidically coupled to the chamber and individually pivotable about a common elongate member that extends along a length of the apparatus, wherein each of the plurality of valves is configured to rotate about the common elongate member independently of other valves; and
a set of actuators to pivot the plurality of valves about the common elongate member to selectively supply pressurized fluid from the chamber along the length of the apparatus.

2. The apparatus of claim 1 , wherein each of the plurality of valves comprises a spring member and is biased in a closed configuration.

3. The apparatus of claim 1 , wherein each of the set of actuators is moveable along a length of the common elongate member, to selectively pivot multiple valves within the plurality of valves.

4. The apparatus of claim 1 , comprising a plurality of latches respectively coupled to the plurality of valves, and individually pivotable about a second elongate member that extends along the length of the apparatus, wherein each of the plurality of latches is configured to hold a valve in an open configuration, such that the pressurized fluid from the chamber is supplied by the valve, when the valve is pivoted by the set of actuators.

5. The apparatus of claim 4 , comprising a second set of actuators to pivot the plurality of latches about the second elongate member to selectively release the plurality of latches and selectively close the plurality of valves.

6. A priming station for a printing system, comprising:
a metering roller to carry primer fluid for application to a printing substrate;
a pressurized air supply; and
an addressable air knife mounted opposite the metering roller and comprising a plurality of valves in fluidic communication with the pressurized air supply, wherein each of the plurality of valves is pivotable about a common elongate member independently of other valves, extends along a width of the metering roller and is individually addressable to selectively remove primer fluid from the metering roller.

7. The priming station of claim 6 , wherein each of the plurality of valves is pivotable about a common elongate member and comprises a spring member to bias a respective valve of the plurality of valves in a closed configuration such that pressurized air from the pressurized air supply is blocked by the valve, and wherein the plurality of valves are individually addressable by an actuator to selectively pivot each of the plurality of valves into an open configuration such that that pressurized air from the pressurized air supply is supplied by the respective valve of the plurality of valves to remove primer fluid from the metering roller.

8. The priming station of claim 7 , comprising a plurality of latches respectively coupled to the plurality of valves, wherein each of the plurality of latches comprises a spring member and is configured to hold the respective valve of the plurality of valves in the open configuration when said valve is pivoted by the actuator.

9. The priming station of claim 8 , wherein the plurality of latches are individually pivotable about a second elongate member, wherein the second elongate member is controllable to pivot the plurality of latches and reset the plurality of valves to the closed configuration.

10. The priming station of 6 , comprising a suction zone having a vacuum supply positioned below the addressable air knife to collect primer fluid removed from the metering roller for re-use.

11. The priming station of claim 6 comprising:
an interface to receive data indicative of a desired pattern of primer fluid application for a printing substrate; and
a controller to control the plurality of valves of the addressable air knife to selectively remove primer fluid from the metering roller.

12. A method of applying primer in a printing system, comprising:
applying primer to a receiving medium;
receiving data indicative of a desired pattern of primer application for a printing substrate; and
controlling a series of fluid-flow control units positioned opposite the receiving medium in accordance with the received data to selectively supply a pressurized fluid and remove the applied primer from the receiving medium, wherein each of the series of fluid-flow control units is configured to rotate about a common elongate member independently.

13. The method of claim 12 , comprising:
receiving further data indicative of a thither desired pattern of further primer application for a further printing substrate;
resetting the series of fluid-flow control units;
re-applying primer to the receiving medium; and
controlling the series of fluid-flow control units in accordance with the received further data to selectively supply the pressurized fluid and remove the re-applied primer from the receiving medium.

14. The method of claim 12 , comprising:
collecting, by suction, the primer removed from the receiving mediums; and
recycling the removed primer to apply to the receiving medium.

15. The method according to claim 12 , comprising:
receiving a printing substrate;
transferring primer to the printing substrate; and
transferring printing fluid to the printing substrate.

Assignees

• Hp Indigo Bv

Inventors

• Feygelman Alex

Classifications

• G03G21/0052 Primary

  using an air flow; Details thereof, e.g. nozzle structure · CPC title

• B05C1/0817

  characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers (coating roller co-operating with dosing rollers B05C1/0834) · CPC title

• G03G15/6585

  by using non-standard toners, e.g. transparent toner, gloss adding devices · CPC title

• B41J11/0015 Primary

  for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114) · CPC title

• B41M5/0017

  Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying · CPC title