Print bar sensors

Patent metadata

Field	Value
Publication number	US-10427406-B2
Application number	US-201615772344-A
Country	US
Kind code	B2
Filing date	Feb 5, 2016
Priority date	Feb 5, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

The present disclosure includes a description of an example print bar that includes an ejection die disposed on a support element, and a sensor disposed at a particular location on the support element.

First claim

What is claimed is:

1. A page wide print bar comprising:
a plurality of ejection dies disposed along a longitudinal dimension of the page-wide print bar on a support element; and
a plurality of discrete sensors disposed at corresponding positions spaced from each other along the dimension of the support element, each sensor positioned to sense print characteristics of an image printed in an overlapping print zone on a print media that corresponds to two adjacent ejection dies of the plurality of ejection dies.

2. The page wide print bar of claim 1 wherein at least some of the sensors each takes the form of an optical sensor to detect a print characteristic of two of the ejection dies.

3. The page wide print bar of claim 1 wherein the support element comprises an over-molded element.

4. The page wide print bar of claim 1 further comprising an electrical connection element coupled to the ejection dies and the sensors.

5. The page wide print bar of claim 4 further comprising a control component coupled to the ejection dies and the sensors.

6. The page wide print bar of claim 1 further comprising a mechanical connection element to couple the ejection dies and the sensors to a printing system.

7. A printing system comprising:
a print bar comprising:
a plurality of ejection dies disposed across a dimension of a support element; and
a plurality of sensors disposed across the dimension of the support element to sense print characteristics of an image printed in a corresponding print zone;

a print media handler to align print media in the print zone;
a controller to receive sensor signals from the plurality of sensors and generate control signals to control the plurality of ejection dies; and

a shared service station to clean both the plurality of ejection dies and the plurality of sensors.

8. The printing system of claim 7 wherein the plurality of sensors are disposed at corresponding positions to sense the print characteristics of the image deposited by two adjacent election dies in the plurality of ejection dies.

9. The printing system of claim 8 wherein the positions correspond to regions in which the two adjacent ejection dies overlap.

10. The printing system of claim 7 wherein the print bar further comprises an application specific integrated circuit (ASIC) comprising logic to control the plurality of ejection dies or the plurality of sensors.

11. The printing system of claim 7 wherein the print bar comprises a mechanical connection element corresponding to mounting features in the printing system.

12. The printing system of claim 7 wherein the print bar further comprises an electronic connection element coupled to the plurality of ejection dies and the sensor and the controller.

Assignees

• Hewlett Packard Development Co

Inventors

• Clark Garrett E
• Cumbie Michael W
• Sells Jeremy
• Mackenzie Mark H

Classifications

• B41J2202/20

  Modules · CPC title

• B41J13/32

  Means for positioning sheets in two directions under one control, e.g. for format control or orthogonal sheet positioning · CPC title

• B41J29/38

  Drives, motors, controls or automatic cut-off devices for the entire printing mechanism · CPC title

• B41J2/2135

  Alignment of dots · CPC title

• B41J11/007

  Conveyor belts or like feeding devices · CPC title