Mask screen for UV curing

Patent metadata

Field	Value
Publication number	US-10022952-B1
Application number	US-201715473293-A
Country	US
Kind code	B1
Filing date	Mar 29, 2017
Priority date	Mar 29, 2017
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A print system and a method for curing marking material on an object using a mask screen are disclosed. For example, the print system includes a plurality of printheads, a curing light source, a movable member to hold an object, a mask screen and a controller to control movement of the movable member to move the object past the array of printheads, to operate the plurality of printheads to eject the marking material onto the object as the object passes the two-dimensional array of printheads, to control movement of the movable member to catch the mask screen and to operate the curing light source to cure the marking material, wherein the amount of energy that is applied to the object is controlled by the mask screen.

First claim

What is claimed is:

1. A print system, comprising:
a plurality of printheads arranged in a two-dimensional array, wherein each one of the plurality of printheads is configured to eject a marking material;
a curing light source coupled to the two-dimensional array of the plurality of printheads;
a movable member to hold an object and comprising a tab member on a bottom side of the movable member, wherein the movable member is positioned parallel to a plane formed by the two-dimensional array of the plurality of printheads and the curing light source;
a mask screen comprising a corresponding tab member configured to catch the tab member on the movable member, the mask screen positioned parallel to the plane, wherein the mask screen is movable to a location between the movable member and the curing light source; and
a controller to control movement of the movable member to move the object past the array of printheads, to operate the plurality of printheads to eject the marking material onto the object as the object passes the two-dimensional array of printheads, to control movement of the movable member to catch the mask screen via the tab member on the movable member and the corresponding tab member on the mask screen and to operate the curing light source to cure the marking material, wherein the amount of energy that is applied to the object is controlled by the mask screen.

2. The print system of claim 1 , wherein the mask screen comprises:
a left guide member;
a right guide member; and
a stopping member, wherein the mask screen is positioned between the left guide member and the right guide member and the stopping member rests against a top of the left guide member and a top of the right guide member.

3. The print system of claim 2 , wherein the stopping member is coupled to a top of the mask screen and positions the mask screen vertically above the movable member and vertically below the curing light source.

4. The print system of claim 2 , wherein a return position comprises the stopping member resting against the top of the left guide member and the top of the right guide member.

5. The print system of claim 1 , wherein the mask screen comprises a plurality of light control areas.

6. The print system of claim 5 , wherein the mask screen comprises a metal and the plurality of light control areas comprises a plurality of holes.

7. The print system of claim 6 , wherein the plurality of holes comprise different diameters based on a distance of a surface of the object from the mask screen.

8. The print system of claim 5 , wherein the mask screen comprises an optically clear material and the light control areas comprise a plurality of different levels of opaqueness in different locations of the mask screen based on a distance of a surface of the object from the mask screen.

9. The print system of claim 8 , wherein the optically clear material comprises a heat resistant plastic or glass.

10. The print system of claim 1 , further comprising:
a mask screen vibrator that vibrates the mask screen horizontally as the mask screen and the object move past the curing light source.

11. A method for curing marking material on an object using a mask screen in a three dimensional (3D) object printer, comprising:
ejecting the marking material onto the object via a two-dimensional array of a plurality of printheads;
moving a movable member holding the object vertically parallel to a plane formed by the two-dimensional array of the plurality of printheads;
catching the mask screen via a tab member on the mask screen and a corresponding tab member on the movable member as the movable member is moving vertically towards a curing light source; and
curing the marking material on the object via the curing light source, wherein the amount of light for curing the marking material on different locations of a surface of the object is controlled by the mask screen.

12. The method of claim 11 , further comprising:
scanning a stock keeping unit (SKU) number of the object before printing; and
inserting the mask screen that is prefabricated that corresponds to the SKU number into the 3D object printer.

13. The method of claim 11 , further comprising:
vibrating the mask screen horizontally as the mask screen and the object are moved past the curing light source.

14. The method of claim 11 , wherein the mask screen is located between the object and the curing light source.

15. The method of claim 11 , wherein the mask screen comprises a metal and a plurality of holes, wherein the plurality of holes comprise different diameters based on a distance of a surface of the object from the mask screen.

16. The method of claim 15 , wherein the mask screen comprises a glass with a plurality of different levels of opaqueness in different locations of the mask screen based on a distance of a surface of the object from the mask screen.

17. A print system, comprising:
a plurality of printheads arranged in a two-dimensional array, wherein each one of the plurality of printheads is configured to eject a marking material;
a curing light source coupled to the two-dimensional array of the plurality of printheads, wherein the curing light source comprises a two-dimensional array of light emitting diodes (LEDs);
a support member positioned to be parallel to a plane formed by the two-dimensional array of the plurality of printheads and the curing light source;
a member that is movably mounted to the support member and comprising a tab member on a bottom side of the member;
an actuator operatively connected to the member to enable the actuator to move the member along the support member;
an object holder, wherein the object holder is configured to mount to the member to enable the object holder to move an object in the object holder past the two-dimensional array of the plurality of printheads and the curing light source as the member moves along the support member;
a mask screen comprising a corresponding tab member configured to catch the tab member on the member, the mask screen positioned parallel to the plane, wherein the mask screen is movable to a location between the movable member and the curing light source; and
a controller operatively connected to the plurality of printheads, the curing light source and the actuator, the controller being configured to operate the actuator to move the object holder past the array of printheads, to operate the plurality of printheads to eject the marking material onto an object held by the object holder as the object holder passes the two-dimensional array of printheads, to control movement of the member to catch the mask screen via the tab member on the member and the corresponding tab member on the mask screen and to operate the curing light source to cure the marking material, wherein the amount of energy that is applied to the object is controlled by the mask screen.

Assignees

• Xerox Corp

Inventors

• Levy Michael Jon
• Herrmann Douglas K
• Mcconville Paul
• Lefevre Jason Matthew
• Praharaj Seemit

Classifications

• B41J3/4073

  Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects (B41J3/283, B41J3/286 take precedence; building up a 3D object using individual droplets from jetting heads B29C64/112) · CPC title

• B41J2/04501

  Control methods or devices therefor, e.g. driver circuits, control circuits · CPC title

• B41F15/36

  flat · CPC title

• B41F23/04

  by heat drying, by cooling, by applying powders {(B41F23/005 takes precedence)} · CPC title

• B41J11/002

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title