Recording apparatus and method of controlling the same

• US 6,070,958 A
• Filed: 06/17/1998
• Issued: 06/06/2000
• Est. Priority Date: 06/19/1997
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Kanome, Yuji
• Primary Examiner(s): Braun, Fred L.
• Application Number:
  US09/098,423
• Time in Patent Office: 720 Days
• Field of Search: 347/7, 347/19, 347/85, 347/86
• US Class Current: 347/7
• CPC Class Codes: B41J 2/1652 by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head
• CPC Class Codes: B41J 2/17566 Ink level or ink residue control

Abstract

An recording apparatus and a method of controlling the operation of the recording apparatus in which the timing of replacing ink cartridges for supplying ink to a recording head or the timing of refilling the ink cartridges with ink is controlled in such a manner as to minimize the total amount of ink consumed during the operation of recovering the recording head performed after the ink cartridge is replaced or refilled thereby achieving a high efficiency in the replacement or refilling of ink cartridges. The amount of remaining ink is monitored for each ink cartridge. If an ink cartridge is detected to be so low in the amount of remaining ink that it should be replaced or refilled, then it is judged whether there is another ink cartridge whose amount of remaining ink is lower than a predetermined value. If there is such an ink cartridge, it is determined that the ink cartridge as well as the former one should also be replaced or refilled with ink. In accordance with the judgement result, information is presented about the ink cartridge which should be replaced or refilled. As opposed to conventional techniques in which there is a possibility that an ink cartridge runs out ink during a recovering operation performed after another ink cartridge was replaced or refilled with ink and thus it is also required to be replaced or refilled, the technique makes it possible to replace or refill ink cartridges in a highly efficient manner.

Claims

1. A recording apparatus for performing a recording operation using a recording head for emitting ink, said recording apparatus comprising:

a mounting unit for replaceably mounting a plurality of ink storage means for storing ink supplied to said recoding head;

remaining amount detection means for detecting the amount of ink remaining in each of the plurality of ink storage means; and

judgement means for determining whether it is required to replace some of the plurality of ink storage means on the basis of the detection result given by said remaining detection means, wherein said judgement means determines whether the amount of ink remaining in some of the plurality of ink storage means has decreased to such an extent that the ink storage means has to be replaced, and if it is determined that there is ink storage means which should be replaced, said judgement means determines that another ink storage means whose remaining ink is lower than a predetermined value should also be replaced; and

informing means for presenting information about the ink storage means which should be replaced, in accordance with the judgement result given by said judgement means.

2. A recording apparatus according to claim 1, further comprising:

recovery means for recovering the emission conditions of said recording head by means of discharging ink from said recording head; and

recover control means for controlling said recovery means so that said recovery means performs the recovering operation after ink storage means is replaced,

wherein said predetermined value is determined depending on the amount of ink discharged from said recording head during the recovering operation performed after the ink storage means is replaced.

3. A recording apparatus according to claim 2, wherein said recovery means recovers the emission conditions of the recording head by emitting ink from the recording head.

4. A recording apparatus according to claim 2, wherein said recovery means recovers the emission conditions of the recording head by discharging ink from the recording head by means of sucking.

5. A recording apparatus according to claim 2, wherein said recovery means consumes ink of all said plurality of ink storage means during the recovering operation.

6. A recording apparatus according to claim 1, wherein said predetermined value is determined on the basis of the break-even point in terms of cost determined for the case where only the ink storage means, whose amount of ink remaining therein has decreased to such an extent that the ink storage means has to be replaced, is replaced and also for the case where in addition to such ink storage means ink storage means whose amount of ink remaining therein has decreased to a level lower than said predetermined value is also replaced.

7. A recording apparatus according to claim 6, wherein said break-even point in terms of cost is determined on the basis of the cost per unit amount of ink stored in each said plurality of ink storage means.

8. A recording apparatus according to claim 1, wherein:

said judgement means determines that ink storage means should be replaced if the amount of ink remaining in said ink storage means has become lower than a first predetermined value;

if said judgement means determines that there is ink storage means which should be replaced, then said judgement means further determines that ink storage means whose amount of ink remaining therein is smaller than a second predetermined value greater than said first predetermined value should also be replaced.

9. A recording apparatus according to claim 8, further comprising:

recovery means for recovering the emission conditions of said recording head by means of discharging ink from said recording head; and

recover control means for controlling said recovery means so that said recovery means performs the recovering operation after ink storage means is replaced,

wherein said second predetermined value is determined on the basis of the amount of ink discharged from the recording head during the recovering operation performed after the replacement of the ink storage means.

10. A recording apparatus according to claim 9, wherein

said recovery means recovers the emission conditions of the recording head by emitting ink from the recording head.

11. A recording apparatus according to claim 9, wherein said recovery means recovers the emission conditions of the recording head by discharging ink from the recording head by means of sucking.

12. A recording apparatus according to claim 9, wherein said recovery means consumes ink of all said plurality of ink storage means during the recovering operation.

13. A recording apparatus according to claim 8, wherein said second predetermined value is determined on the basis of the break-even point in terms of cost determined for the case where only the ink storage means whose amount of ink remaining therein has become lower than said first predetermined value is replaced and also for the case where in addition to such ink storage means ink storage means whose amount of ink remaining therein has become lower than said second predetermined value is also replaced.

14. A recording apparatus according to claim 13, wherein said break-even point in terms of cost is determined on the basis of the cost per unit amount of ink stored in each said plurality of ink storage means.

15. A recording apparatus according to claim 1, wherein said plurality of ink storage means are ink cartridges which are capable of supplying ink when they are mounted on said mounting unit.

16. A recording apparatus according to claim 1, wherein said plurality of ink storage means are integrated in a single form with said recording head.

17. A recording apparatus according to claim 1, wherein said recording head includes an emission orifice via which ink is emitted and also includes emission means for emitting ink via said emission orifice.

18. A recording apparatus according to claim 17, wherein

said emission means is an electro-thermal conversion element for applying thermal energy to ink so that a bubble is generated in said ink by the thermal energy thereby emitting the ink via said emission orifice.

19. A method of controlling a recording apparatus, said recording apparatus including a mounting unit for replaceably mounting a plurality of ink storage means for storing ink, said recording apparatus being adapted to perform a recording operation using a recording head for emitting ink supplied from said ink storage means, said method comprising the steps of:

detecting the amount of ink remaining in each of the plurality of ink storage means;

judging whether replacement is required on each of the plurality of ink storage means on the basis of the detection result obtained in the step of detecting the amount of remaining ink, wherein in said judgement step it is determined whether the amount of ink remaining in some of the plurality of ink storage means has decreased to such an extent that the ink storage means has to be replaced, and if it is determined that there is ink storage means which should be replaced, it is further determined that another ink storage means whose remaining ink is lower than a predetermined value should also be replaced; and

presenting information about the ink storage means which should be replaced, in accordance with the judgement result made in said judgement step.

20. A method for controlling a recording apparatus, according to claim 19, wherein

said judgement step determines that ink storage means should be replaced if the amount of ink remaining in ink storage means has become lower than a first predetermined value;

and

if it is determined that there is ink storage means which should be replaced, then it is further determined that ink storage means whose amount of ink remaining therein is smaller than a second predetermined value greater than said first predetermined value should also be replaced.

21. A method for controlling a recording apparatus, according to claim 20, further comprising the steps of:

after completion of replacing said ink storage means, recovering the emission conditions of said recording head by discharging ink from said recording head,

wherein said second predetermined value is determined on the basis of the amount of ink discharged from the recording head during said recovering step performed after the replacement of the ink storage means.

22. A method for controlling a recording apparatus, according to claim 21, wherein in said recovering step, the emission conditions of the recording head are recovered by emitting ink from the recording head.

23. A method for controlling a recording apparatus, according to claim 21, wherein in said recovering step, the emission conditions of the recording head are recovered by discharging ink from the recording head by means of sucking.

24. A method for controlling a recording apparatus, according to claim 21, wherein in said recovering step, ink of all said plurality of ink storage means is consumed by the recovering operation.

25. A method for controlling a recording apparatus, according to claim 20, wherein said second predetermined value is determined on the basis of the break-even point in terms of cost determined for the case where only the ink storage means whose amount of ink remaining therein has become lower than said first predetermined value is replaced and also for the case where in addition to such ink storage means ink storage means whose amount of ink remaining therein has become lower than said second predetermined value is also replaced.

26. A method for controlling a recording apparatus, according to claim 25, wherein said break-even point in terms of cost is determined on the basis of the cost per unit amount of ink stored in each said plurality of ink storage means.

27. A method for controlling a recording apparatus, according to claim 19, wherein said recording head includes an emission orifice via which ink is emitted and also includes emission means for emitting ink via said emission orifice.

28. A method for controlling a recording apparatus, according to claim 27, wherein said emission means is an electro-thermal conversion element for applying thermal energy to ink so that a bubble is generated in said ink by the thermal energy thereby emitting the ink via said emission orifice.

29. A recording apparatus for performing a recording operation using a recording head for emitting ink, said recording apparatus comprising:

a plurality of ink storage means for storing ink supplied to said recoding head;

remaining amount detection means for detecting the amount of ink remaining in each of the plurality of ink storage means; and

judgement means for determining whether it is required to refill some of the plurality of ink storage means with ink on the basis of the detection result given by said remaining detection means, wherein said judgement means determines whether the amount of ink remaining in some of the plurality of ink storage means has decreased to such an extent that the ink storage means should be refilled with ink, and if it is determined that there is ink storage means which should be refilled with ink, said judgement means determines that another ink storage means whose remaining ink is lower than a predetermined value should also be refilled with ink; and

informing means for presenting information about the ink storage means which should be refilled with ink, in accordance with the judgement result given by said judgement means.

30. A recording apparatus according to claim 29, wherein:

said judgement means determines that ink storage means should be refilled with ink if the amount of ink remaining in said ink storage means has become lower than a first predetermined value; and

if said judgement means determines that there is ink storage means which should be refilled with ink, then said judgement means further determines that ink storage means whose amount of ink remaining therein is smaller than a second predetermined value greater than said first predetermined value should also be refilled with ink.

31. A recording apparatus according to claim 30, further comprising:

recovery means for recovering the emission conditions of said recording head by means of discharging ink from said recording head; and

recover control means for controlling said recovery means so that said recovery means performs the recovering operation after ink storage means is refilled with ink;

wherein said second predetermined value is determined on the basis of the amount of ink discharged from the recording head during the recovering operation performed after the ink storage means is refilled with ink.

32. A recording apparatus according to claim 31, wherein said recovery means recovers the emission conditions of the recording head by emitting ink from the recording head.

33. A recording apparatus according to claim 31, wherein said recovery means recovers the emission conditions of the recording head by discharging ink from the recording head by means of sucking.

34. A recording apparatus according to claim 31, wherein said recovery means consumes ink of all said plurality of ink storage means during the recovering operation.

35. A recording apparatus according to claim 30, wherein said second predetermined value is determined on the basis of the break-even point in terms of cost determined for the case where only the ink storage means whose amount of ink remaining therein has become lower than said first predetermined value is refilled with ink and also for the case where in addition to such ink storage means ink storage means whose amount of ink remaining therein has become lower than said second predetermined value is also refilled with ink.

36. A recording apparatus according to claim 35, wherein said break-even point in terms of cost is determined on the basis of the cost per unit amount of ink stored in each said plurality of ink storage means.

37. A recording apparatus according to claim 29, wherein:

said plurality of ink storage means are ink cartridges which can be refilled with ink.

38. A recording apparatus according to claim 29, wherein:

said plurality of ink storage means are integrated in a single form with said recording head.

39. A recording apparatus according to claim 29, wherein:

said recording head includes an emission orifice via which ink is emitted and also includes emission means for emitting ink via said emission orifice.

40. A recording apparatus according to claim 39, wherein:

said emission means is an electro-thermal conversion element for applying thermal energy to ink so that a bubble is generated in said ink by the thermal energy thereby emitting the ink via said emission orifice.

41. A method of controlling a recording apparatus, said recording apparatus including a plurality of ink storage means for storing ink, said recording apparatus being adapted to perform a recording operation using a recording head for emitting ink supplied from said ink storage means, said method comprising the steps of:

detecting the amount of ink remaining in each of the plurality of ink storage means;

judging whether some of the plurality of ink storage means should be refilled with ink on the basis of the detection result obtained in the step of detecting the amount of remaining ink, wherein in said judgement step it is determined whether the amount of ink remaining in some of the plurality of ink storage means has decreased to such an extent that the ink storage means should be refilled with ink, and if it is determined that there is ink storage means which should be refilled with ink, said judgement means determines that another ink storage means whose remaining ink is lower than a predetermined value should also be refilled with ink; and

presenting information about the ink storage means which should be refilled with ink, in accordance with the judgement result made in said judgement step.

42. A method for controlling a recording apparatus, according to claim 41, wherein

said judgement step determines that ink storage means should be refilled with ink if the amount of ink remaining in ink storage means has become lower than a first predetermined value;

and

if it is determined that there is ink storage means which should be refilled with ink, then it is further determined that ink storage means whose amount of ink remaining therein is smaller than a second predetermined value greater than said first predetermined value should also be refilled with ink.

43. A method for controlling a recording apparatus, according to claim 42, further comprising the steps of:

after completion of refilling said ink storage means with ink, recovering the emission conditions of said recording head by discharging ink from said recording head,

wherein said second predetermined value is determined on the basis of the amount of ink discharged from the recording head during said recovering step performed after the ink storage means is refilled with ink.