Systems and methods for image distortion reduction in web printing

Patent metadata

Field	Value
Publication number	US-9446586-B2
Application number	US-201313963058-A
Country	US
Kind code	B2
Filing date	Aug 9, 2013
Priority date	Aug 9, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

Included are embodiments for image distortion reduction in web printing. Some embodiments are configured for determining an ink drop speed of ink from a printer and determining a web travel speed of a web of material, where the web of material engages with a folding board during printing that manipulates a plane of the web of material such that a projection of the web width is effectively reduced. Some embodiments may be configured for determining an altered web geometry of the web of material while engaging with the folding board, receiving a desired image for printing on the web of material, and calculating a pixel displacement of the plurality of pixels. Some embodiments may be configured for creating an altered image that utilizes the pixel displacement from the desired image and sending data related to the altered image for printing on the web of material.

First claim

What is claimed is:

1. A system for image distortion reduction in web printing, comprising:
a folding board of a predetermined shape consisting of a dual folding board with a multi-triangular configuration equivalent to an upside down w that defines an altered web geometry and receives a moving web of material with a starting web width such that when the folding board receives a printing area of the moving web of material, a plane of the moving web of material is manipulated such that a projection of the starting web width is effectively reduced by to create an altered geometry, wherein the moving web of material moves at a web travel speed in a machine direction, and wherein after the printing area of moving web of material passes the folding board, the starting web width is restored;
a printer that prints on the moving web of material at the printing area where the folding board receives the printing area by dispensing ink drops onto the moving web of material at an ink drop speed, wherein the printer prints at a printing width that is less than a width of the altered geometry; and
a computing device comprising a processor and a memory component, wherein the memory component stores logic that, when executed by the processor, causes the system to perform at least the following:
determine the ink drop speed, the web travel speed, and the altered web geometry;
receive a desired image for printing on the moving web of material at the printing area, wherein the desired image includes a pixel;
calculate, from the ink drop speed, the web travel speed, and the altered web geometry, a pixel displacement of the pixel in a cross-machine direction that will accurately print the desired image in the printing area while the folding board is receiving the printing area;
create an altered image that utilizes the pixel displacement from the desired image; and
send data related to the altered image to the printer for printing.

2. The system of claim 1 , wherein calculating the pixel displacement further utilizes at least one of the following: a characteristic of the ink, a characteristic of the moving web of material, and a characteristic of the printer.

3. The system of claim 1 , further comprising a vision device that captures the altered image, wherein the logic further causes the system to perform at least the following:
determine whether the altered image on the moving web of material substantially matches the desired image after the moving web of material at the printing area is moved from the folding board; and
in response to determining that the altered image on the moving web of material does not substantially match the desired image, recalculate the pixel displacement.

4. The system of claim 1 , wherein the logic further causes the system to perform at least the following:
detect a speed change in the web travel speed; and
further alter the altered image, based on the speed change.

5. The system of claim 1 , wherein the logic further causes the system to utilize a deformation factor to calculate the pixel displacement.

6. The system of claim 1 , wherein the pixel displacement additionally occurs in the machine direction, wherein the machine direction is substantially perpendicular to the cross-machine direction.

7. The system of claim 1 , wherein the logic further causes the system to perform at least the following:
determine a first number of pixels in the desired image; and
calculate a second number of pixels in the altered image.

Assignees

• Procter & Gamble

Inventors

• Matos Claudio Antonio
• Oetjen David Christopher

Classifications

• H04N1/387

  Composing, repositioning or otherwise {geometrically} modifying originals · CPC title

• B41J15/046

  for the guidance of continuous copy material, e.g. for preventing skewed conveyance of the continuous copy material · CPC title

• B41J2/07 Primary

  characterised by jet control (B41J2/205 takes precedence) · CPC title

• B41J11/0025 Primary

  Handling copy materials differing in width · CPC title

• B41J11/008

  Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins · CPC title