Apparatus and methods for servicing 3D printers

• US 7,387,359 B2
• Filed: 11/30/2004
• Issued: 06/17/2008
• Est. Priority Date: 09/21/2004
• Status: Active Grant

• Current Assignee: 3D Systems, Inc. (3D Systems Corporation)
• Original Assignee: Z CORPORATION (A Holdings Corp.)
• Inventors: Katalichenko, Dmitriy, Korda, Chris, Sweet-Block, Benjamin D., Kinsley, Joshua P., Hernandez, Andres Tomas, Zengerle, Walter H. III, Berlin, Andrew A., Russell, David B.
• Primary Examiner(s): Do; An H.
• Assistant Examiner(s): AL HASHIMI, SARAH
• Application Number:
  US10/999,847
• Publication Number:
  US 20060061618A1
• Time in Patent Office: 1,295 Days
• Field of Search: 347/29, 347/33, 347/19
• US Class Current: 347/29
• CPC Class Codes: B29C 64/112 using individual droplets, e.g. from jetting heads
• CPC Class Codes: B33Y 40/00 Auxiliary operations or equipment, e.g. for material handling
• CPC Class Codes: B41J 2/16532 by applying vacuum only
• CPC Class Codes: B41J 2/16538 with brushes or wiper blades perpendicular to the nozzle plate
• CPC Class Codes: B41J 2/16552 using cleaning fluids

Abstract

The invention relates to apparatus and methods for producing three-dimensional objects and auxiliary systems used in conjunction with the aforementioned apparatus and methods. The apparatus and methods involve 3D printing and servicing of the equipment used in the associated 3D printer.

Claims

1. An apparatus for cleaning a printhead, the apparatus comprising:

at least one nozzle for spraying a cleaning fluid towards a printhead face of the printhead;

a wiper disposable in close proximity to the printhead face for removing excess cleaning fluid from the printhead face; and

a splash guard for isolating a printhead face and preventing cleaning fluid from migrating beyond the printhead face, wherein the splash guard comprises an open position, a sealed position, and a sealing lip that circumscribes the printhead face when in the sealed position, and the splash guard is actuated from the open position to the sealed position by contact with a printhead.

2. The apparatus of claim 1, wherein the sealing lip is generally rectangular in shape.

3. The apparatus of claim 2, wherein the wiper is formed by one side of the sealing lip, the wiper including a notched portion configured and located to correspond to a location of a jet nozzle array on the printhead face to prevent the wiper from contacting the jet nozzle array.

4. The apparatus of claim 1, wherein the wiper is capable of movement relative to a printhead.

5. The apparatus of claim 1 further comprising a fluid source for providing cleaning fluid to the at least one nozzle under pressure.

6. The apparatus of claim 1, wherein the at least one nozzle comprises an array of nozzles.

7. The apparatus of claim 1, wherein the at least one nozzle is positionable to spray the cleaning fluid across the printhead face.

8. A method of cleaning a printhead, the method comprising the steps of:

positioning a printhead face of the printhead relative to at least one nozzle;

operating the at least one nozzle to spray cleaning fluid towards the printhead face; and

causing relative movement between a wiper and the printhead to pass the wiper in close proximity to the printhead face to remove excess cleaning fluid, wherein the wiper defines a notch configured and located on the wiper to correspond to a location of a jet nozzle array on the printhead face to prevent the wiper from contacting the jet nozzle array.

9. The method of claim 8, wherein the step of positioning the printhead face comprises sealing the printhead face to prevent the cleaning fluid from migrating beyond the printhead face.

10. The method of claim 8, wherein the operating step comprises spraying the cleaning fluid across the printhead face.

11. The method of claim 8 further comprising the step of operating the printhead to discharge cleaning fluid ingested by the printhead during cleaning.

12. The method of claim 8, wherein the at least one nozzle comprises an array of nozzles.