Skewing print medium

Patent metadata

Field	Value
Publication number	US-10682871-B2
Application number	US-201515570885-A
Country	US
Kind code	B2
Filing date	Jul 13, 2015
Priority date	Jul 13, 2015
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

In one example implementation, a printing device may comprise a number of media skewing rollers to skew a print medium to a predetermined angle with respect to a media feed path and a print engine to print an image on the skewed print medium, the print engine skewing a digital representation of the image based on the predetermined angle such that the image printed is aligned with the print medium. In another example implementation, a printing device may comprise a number of skewing rollers to skew a print medium to a predetermined angle with respect to a media path, a number of pinch rollers to receive the skewed print medium prior to printing, and a print engine skewed to the same predetermined angle as the skewed print medium.

First claim

What is claimed is:

1. A printing device comprising:
a skew sensor to determine a first angle of a print medium with respect to a media feed path;
a number of media skewing rollers to increase skew of the print medium so that the skewed print medium has a skew angle of a predetermined angle greater than the first angle with respect to the media feed path, wherein operation of the number of media skewing rollers is based on the determination of the first angle by the skew sensor; and
a print engine to print an image on the skewed print medium, the print engine skewing a digital representation of the image based on the predetermined angle such that the image printed is aligned with the print medium.

2. The printing device of claim 1 , wherein the number of media skewing rollers are driven independent of each other and the number of media skewing rollers cooperate to create the skew angle.

3. The printing device of claim 1 , wherein the print engine maintains a top-of-form and edge registration properties of the digital representation of the image when aligning the printed image with the print medium.

4. The printing device of claim 1 , wherein the predetermined angle is less than 10 degrees.

5. The printing device of claim 1 , further comprising a number of deskewing rollers to deskew the print medium with respect to the media feed path prior to the skewing rollers skewing the print medium.

6. The printed device of claim 1 , further comprising a number of pinch rollers to receive the skewed print medium prior to the print medium receiving an image.

7. The printing device of claim 1 , wherein the sensor provides closed loop feedback to the number of media skewing rollers to continually maintain the skew angle at the predetermined angle.

8. The printed device of claim 1 , wherein the skew sensor is to move with the print medium along a portion of the media feed path.

9. A printing device, comprising:
a skew sensor to determine a first angle of a print medium with respect to a media feed path;
a number of skewing rollers to further skew in the print medium with respect to the media feed path so as to create a skew angle at a predetermined angle, wherein operation of the number of skewing rollers is based on the determination of the first angle by the skew sensor;
a number of pinch rollers to receive the skewed print medium prior to printing; and
a print engine to be skewed to the skew angle of the print medium.

10. The printing device of claim 9 , wherein the predetermined angle is 0.25 to 10 degrees.

11. The printing device of claim 9 , wherein the skew sensor is to move with the print medium along a portion of the media path.

12. The printing device of claim 9 , wherein the skew sensor provides continuous feedback to direct the number of skewing rollers to maintain the skew angle of the print medium at the predetermined angle as the print medium progresses along the media path.

13. The printing device of claim 9 , wherein the print engine maintains top-of-form and edge registration properties associated with an image to be printed by the print engine.

14. A non-transitory computer-readable storage medium encoded with instructions executable by a processor, the computer-readable storage medium comprising instructions to:
(a) receive information from a sensor, the information being indicative of a first angle of a print medium in a media feed path;
(b) operate a number of skew rollers, based on the information from the sensor, to create a skew angle of the print medium, the skew angle being greater than the first angle such that skew of the print medium is increased by the skew rollers to a predetermined angle.

15. The non-transitory computer-readable storage medium of claim 14 , further comprising instructions to:
repeat (a) and (b) continuously as the print medium progresses through at least a part of the media feed path.

16. The non-transitory computer-readable storage medium of claim 14 , further comprising instructions to:
cause a print engine to be skewed to the skew angle of the print medium.

17. The non-transitory computer-readable storage medium of claim 14 , wherein the instructions to operate a number of skew rollers includes instructions to drive each skew roller of the number of skew rollers independently of the other skew rollers.

Assignees

• Hewlett Packard Development Co

Inventors

• Sosnowski Luke P
• Mackenzie Mark H

Classifications

• B41J11/0095 Primary

  Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end · CPC title

• B65H2511/216

  Orientation, e.g. with respect to direction of movement · CPC title

• B41J2/07

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

• B65H2404/133

  Limited number of active elements on common axis · CPC title

• B41J13/0027

  in the printing section of automatic paper handling systems · CPC title