Ink rationing based on page composition

• US 6,761,422 B2
• Filed: 10/30/2001
• Issued: 07/13/2004
• Est. Priority Date: 10/30/2001
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Smith, Donald X. II
• Primary Examiner(s): Meier, Stephen D.
• Assistant Examiner(s): Do, An H.
• Application Number:
  US10/001,648
• Publication Number:
  US 20030081020A1
• Time in Patent Office: 987 Days
• Field of Search: 347/15, 347/5, 347/7, 347/19, 347/12, 358/1.15, 358/1.16, 358/75.78, 358/80, 358/49, 101/365-367, 399/25, 399/24, 399/27, 399/30
• US Class Current: 347/5
• CPC Class Codes: B41J 29/393 Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
• CPC Class Codes: G06F 3/1219 with regard to consumables, e.g. ink, toner, paper
• CPC Class Codes: G06F 3/1244 Job translation or job parsing, e.g. page banding
• CPC Class Codes: G06F 3/1246 by handling markup languages, e.g. XSL, XML, HTML
• CPC Class Codes: G06F 3/1254 Automatic configuration, e.g. by driver

Abstract

The print content is received and parsed to determine if different priority levels have been assigned to any section of the content. If any section of the content has been assigned a priority level, an ink rationing process is invoked. The manner in which the content is printed depends on the ink supply level and the priority assigned to each section. If the ink supply level is low and a particular section has been assigned a low priority, that section is printed in grayscale or degraded in some other way that uses less ink. Other higher priority sections of the content are printed in normal mode.

Claims

1. A method for rationing ink in a printer, the printer having an ink supply for printing content on print media, the method comprising the steps of:

receiving a print job comprising one or more sections of print content identified by metadata in which one or more of the sections of print content are assigned priority levels according to the metadata;

parsing the metadata associated with one or more sections of print content prior to printing the print job;

if a section of print content is assigned a priority level, printing the section of print content in a print mode that is appropriate for the priority level; and

if a section of print content is not assigned a priority level, printing the section of print content using a normal print mode.

2. The method of claim 1 further comprising printing each section of print content according to the priority level assigned to that particular section of print content.

3. The method of claim 1 further comprising the steps of printing a first section of print content assigned a low priority level in grayscale;

and

printing a second section of print content that assigned a high level of priority in the normal print mode.

4. The method of claim 1 and further comprising the step of coupling the printer to a computer.

5. The method of claim 4 wherein the step of parsing is performed by the computer.

6. The method of claim 1 wherein the metadata identifies a type of content selected from a set of content including:

images, text and advertisement.

7. A printer having a capability to ration its ink supply in response to the ink supply level, the printer comprising:

a printing device that prints a received print job containing metadata in which one or more of the sections of print content are assigned priority levels according to metadata; and

a controller, coupled to the printing device, that controls the printing device in response to the print job, the controller having means for instructing the printing device to print each section of print content in an ink-rationing mode in response to both the ink supply level and the priority level associated with that section of print content.

8. The printer of claim 7 wherein the ink supply comprises a laser printer toner supply.

9. The printer of claim 7 wherein the printing device comprises a thermal inkjet pen.

10. The printer of claim 7 wherein the printing device comprises a piezoelectric inkjet pen.

11. A printer having a capability to ration its ink supply in response to the ink supply level, the printer comprising:

a printing device that prints a received print job on print media, the print job comprising one or more sections of print content identified by metadata in which one or more of the sections of print content are assigned priority level; and

a controller, coupled to the printing device, that controls the printing device in response to the print job, the controller comprising means for instructing the printing device to print a first section of content in an ink-rationing mode in response to at least one of the ink supply level and the priority level assigned to the first section by the metadata.

12. A method for generating a print document that can be printed in an ink rationing printer, the method comprising the steps of:

generating content that is comprised one or more sections of print content;

assigning a print priority level to each section of the at least one section of the content; and

generating the print document comprising the one or more sections of print content, and metadata in which at least one of the one or more sections of print content is assigned a priority level.

13. The method of claim 12 wherein the at least one print priority level in a minimum print priority level.

14. The method of claim 13 and further including the steps of:

transmitting the print document to a printer having an ink rationing mode, the ink rationing mode printing the content in response to a printer ink supply level and the at least one priority level; and

generating a charge of a predetermined monetary value if the print document is printed at a priority level that is less than the minimum print priority level.

15. In a printer comprising an ink supply for printing content on print media, the method comprising the steps of:

receiving a print job comprising one or more sections of print content identified by metadata in which one or more of the sections of print content are assigned priority levels according to the metadata;

parsing the metadata associated with the one or more sections of print content prior to printing the print job;

if the print content is assigned a priority level, printing the print content in a print mode that is appropriate for the priority level; and

if the print content is not assigned a priority level, printing the print content using a normal print mode.

16. The printer of claim 15 wherein the ink supply comprises a laser printer toner supply.

17. A printer having a capability to ration its ink supply, the printer comprising:

a printing device that prints a received print job on print media, the print job comprising one or more sections of print content identified by metadata in which one or more of the sections of print content are assigned priority levels according to the metadata; and

a controller, coupled to the printing device, that controls the printing device in response to the print job, the controller comprising;

means for parsing the print job to determine the print priority level of each section of content according to the metadata; and

means for instructing the printing device to print a first section of content in an ink-rationing mode in response to at least one of the ink supply level and the first section priority level.

18. The printer of claim 17 wherein the ink rationing mode comprises printing in a grayscale mode.

19. In a system comprising a computer coupled to a printer, the printer having an ink supply for printing content on print media and capable of:

receiving a print job comprising one or more sections of print content identified by metadata in which one or more of the sections of print content are assigned priority levels according to the metadata;

parsing the print content to determine at least one print priority level for each section of the at least one section according to the metadata;

generating a print job in response to the content and the at least one print priority level;

transmitting the print job to the printer; and

printing the print job in response to the content and the at least one print priority level.

20. The system of claim 19 wherein the step of printing comprises printing the content in an ink rationing mode in response to the at least one print priority level.

21. The system of claim 20 wherein the ink rationing mode comprises printing the content in grayscale.