Method of elevated printing

• US 9,834,006 B2
• Filed: 06/02/2016
• Issued: 12/05/2017
• Est. Priority Date: 06/10/2015
• Status: Active Grant

• Current Assignee: Océ-Technologies B.V. (Canon Inc.)
• Original Assignee: Océ-Technologies B.V. (Canon Inc.)
• Inventors: Weijkamp, Clemens, Valade, Cdric
• Primary Examiner(s): Luu, Matthew
• Assistant Examiner(s): MCMILLION, TRACEY M
• Application Number:
  US15/171,432
• Publication Number:
  US 20160361929A1
• Time in Patent Office: 551 Days
• Field of Search: None
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B41J 2/14 Structure thereof only for on-demand ink jet heads
• CPC Class Codes: B41J 2/21 for multi-colour printing

Abstract

A method of forming a solid body using a two-dimensional image printer, wherein liquid droplets of different colors are used for applying solid material in several layers one upon the other, and colors of the liquids for forming a surface layer of the body are selected from a specific set of surface colors, the surface layer being formed by mixed printing of transparent droplets and surface color droplets, characterized in that the thickness of the surface layer is varied such that it increases with increasing slope of the surface of the body.

Claims

1. A method of forming a solid body using a two-dimensional image printer, comprising:

applying materials of different colors in liquid droplets for solidifying in several layers one upon the other to form a body having an interior and surface layer, and selecting colors of the liquids for forming the surface layer of the body from a specific set of surface colors, the surface layer being formed by mixed printing of transparent droplets and surface color droplets,

wherein a thickness of the surface layer in a direction normal to the surface layer increases with increasing slope of the surface layer of the body.

2. The method according to claim 1, further comprising curing the liquid droplets after application by UV-radiation.

3. The method according to claim 1, wherein the surface layer, at least in selected surface portions of the body, comprises droplets that are arranged in several layers superposed in the direction of the normal to the surface layer.

4. The method according to claim 3, wherein the surface layer comprises a layer of colored material sandwiched between two layers of transparent material.

5. The method according to claim 1, wherein the number of droplet layers constituting the surface layer is varies with the slope of the surface layer.

6. The method according to claim 1, wherein the ratio between transparent droplets and surface color droplets varies with the thickness of the surface layer.

7. The method according to claim 1, further comprising forming a primer layer of droplets that have a uniform color immediately underneath the surface layer.

8. The method according to claim 7, wherein the primer layer comprises predominately white material.