Printer having separated printhead array and method for operating a printer having a separated printhead array

Patent metadata

Field	Value
Publication number	US-2017368741-A1
Application number	US-201615195475-A
Country	US
Kind code	A1
Filing date	Jun 28, 2016
Priority date	Jun 28, 2016
Publication date	Dec 28, 2017
Grant date	—

Abstract

A printer is configured with at least two printheads that are separated from one another in a cross-process direction by an integral multiple of printhead widths. This configuration enables parallel swaths of material to be ejected and then movement of the printheads in the cross-process direction by a distance corresponding to one or more integral numbers of the printhead width enables the area between the swaths to be completed and the area outside of the original swaths printed.

First claim

What is claimed is:

1 . A printer comprising:
a member having a surface; at least two printheads, each printhead having an array of ejectors configured to eject drops of material toward the surface of the member, the printheads in the at least two printheads being mounted in tandem with one another and each of the printheads in the at least two printheads being separated in a cross-process direction from a closest printhead in the at least two printheads by a distance corresponding to an integral number of widths of one of the printheads; at least one actuator operatively connected to the member or the at least two printheads; and a controller operatively connected to the at least two printheads and the at least one actuator, the controller being configured to:
operate the at least one actuator to move the member or the at least two printheads in a process direction while operating the at least two printheads to eject drops of material from the at least two printheads and form a swath with each of the printheads in the at least two printheads with the swaths being separated by the distance corresponding to the integral number of widths of one of the printheads; and
operate the at least one actuator to move the member or the at least two printheads in the cross-process direction by a distance corresponding to one or more integral number of widths of one of the printheads.

2 . The printer of claim 1 wherein the printheads in the at least two printheads are separated by a distance corresponding to a width of a single printhead.

3 . The printer of claim 1 wherein the printheads in the at least two printheads are separated by a distance corresponding to a width of two printheads.

4 . The printer of claim 1 , the controller is further configured to:
operate the at least one actuator to move the at least two printheads in the process direction after the member or the at least two printheads have been moved in the cross-process direction while operating the at least two printheads to eject drops of material from the at least two printheads and form another swath with each of the printheads in the at least two printheads with the swaths being separated by the distance corresponding to the integral number of widths of one of the printheads.

5 . The printer of claim 1 further comprising:
at least two curing devices separated by the distance corresponding to the integral number of widths of one of the printheads; and
the controller operatively connected to the at least two curing devices, the controller being configured to:
operate the at least one actuator to move the member or the at least two curing devices in the process direction while operating the at least two curing devices to expose the drops of material ejected from the at least two printheads.

6 . The printer of claim 1 further comprising:
at least two rollers separated by the distance corresponding to the integral number of widths of one of the printheads; and
the controller being further configured to:
operate the at least one actuator to move the member or the at least two rollers in the process direction at a predetermined distance from the drops of material ejected from the at least two printheads while operating the at least one actuator to rotate the at least two rollers to remove a portion of the drops of material ejected from the at least two printheads.

7 . The printer of claim 1 further comprising:
a roller having at least two portions with a diameter that is greater than one or more portions of the roller separating the portions having the greater diameter, the portions having the greater diameter being separated by the distance corresponding to the integral number of widths of one of the printheads; and
the controller being further configured to:
operate the at least one actuator to move the member or the roller in the process direction at a predetermined distance from the drops of material ejected from the at least two printheads while operating the at least one actuator to rotate the roller to remove a portion of the drops of material ejected from the at least two printheads.

8 . The printer of claim 1 , the controller being further configured to:
operate the at least one actuator to move the member or the at least two printheads in the cross-process direction to enable the at least two printheads to eject drops of material within a swath previously formed by the at least two printheads.

9 . The printer of claim 1 , the controller being further configured to:
operate the at least one actuator to move the member or the at least two printheads in the cross-process direction by a distance that enables the at least two printheads to form a swath over swaths previously formed by the at least two printheads with edges of the swaths being formed not being aligned with edges of the swaths previously formed by the at least two printheads.

10 . A method of operating a printer comprising:
operating at least one actuator with a controller to move a member having a surface or at least two printheads in a process direction while operating the at least two printheads to eject drops of material from the at least two printheads and form a swath on the member with each of the printheads in the at least two printheads, the swaths being separated by a distance corresponding to an integral number of widths of one of the printheads; and operating the at least one actuator with the controller to move the member or the at least two printheads in the cross-process direction by a distance corresponding to one or more integral number of widths of one of the printheads.

11 . The method of claim 10 wherein the printheads in the at least two printheads are separated by a distance corresponding to a width of a single printhead.

12 . The method of claim 10 wherein the printheads in the at least two printheads are separated by a distance corresponding to a width of two printheads.

13 . The method of claim 10 further comprising:
operating the at least one actuator with the controller to move the at least two printheads in the process direction after the member or the at least two printheads have been moved in the cross-process direction while operating the at least two printheads with the controller to eject drops of material from the at least two printheads to form another swath on the member with each of the printheads in the at least two printheads, the swaths being separated by the distance corresponding to the integral number of widths of one of the printheads.

14 . The method of claim 10 further comprising:
operating the at least one actuator with the controller to move in the process direction the member or at least two curing devices separated by the distance corresponding to the integral number of widths of one of the printheads while operating the at least two curing devices with the controller to expose the drops of material ejected from the at least two printheads.

15 . The method of claim 10 further comprising:
operating the at least one actuator with the controller to move in the process direction the member or at least two rollers separated from one another by the distance corresponding to the integral number of widths of one of the printheads and separated from the drops of material ejected from the at least two printheads by a predetermined distance while operating the at least one actuator with the controller to rotate the at least two rollers to remove a portion of the drops of material ejected from the at least two printheads.

16 . The method of claim 10 further comprising:

Assignees

• Xerox Corp

Inventors

• Mandel Barry P
• Giacobbi James L
• Mcconville Paul J
• Mantell David A
• Spence James J
• Calamita James P

Classifications

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B41J2/145

  Arrangement thereof · CPC title

• B29C64/112 Primary

  using individual droplets, e.g. from jetting heads · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title