Enhanced discharge recovery for ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorIsao Ebisawa
Life of this patent
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Abstract
A recovery method, for an ink jet recording apparatus having a recording head for recording by discharging the ink with bubbles formed by thermal energy applied to a heat acting area and an energy supplying device for providing the thermal energy, includes a compulsory recovery mode in which more than 10.sup.3 predischarges are performed by supplying energy exceeding 1.48 times the minimum energy Eo necessary for producing the bubbles.
Claims17
A recovery method for an ink jet recording apparatus comprising recording means for recording by discharging ink with bubbles formed by thermal energy applied to a heat acting area in an ink holding portion and energy supply means for supplying the thermal energy on said recording means, the method including performing a compulsory recovery in which more than 10.sup.3 predischarges are performed by supplying energy exceeding 1.48 times the minimum energy Eo necessary for producing the bubbles.
An ink jet recording apparatus comprising:
- recording means for recording by discharging ink;
- and
- means for supplying more than 10.sup.3 shots of energy exceeding 1.48 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to a heat acting area in an ink holding portion of said recording means.
An ink jet recording apparatus
- means for supplying energy to preheat a heat acting area in an ink holding portion;
- and
- means for supplying more than 5.times.10.sup.5 shots of energy exceeding 1.44 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to said heat acting area.
An ink jet recording apparatus comprising a recording sheet conveying mechanism, a recording head having an ink holding portion and a heat acting area wherein bubbles are formed, and a recording head cap having therein an absorbing member;
- wherein:
- said apparatus has a compulsory recovery mode during recording in which predischarge is performed into said recording head cap by supplying more than 10.sup.3 shots of energy exceeding 1.48 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to said heat acting area;
- and
- said apparatus has a compulsory recovery mode during non-recording in which discharge is performed onto a recording sheet conveyed from said recording sheet conveying mechanism by supplying more than 10.sup.4 shots of energy exceeding 1.48 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to said heat acting area.
An ink jet recording apparatus comprising a recording sheet conveying mechanism and a recording head having an ink holding portion and a heat acting area wherein bubbles are formed;
- wherein:
- said apparatus has a compulsory recovery mode during non-recording in which predischarge is performed onto a recording sheet conveyed from said recording sheet conveying mechanism by supplying more than 10.sup.4 shots of energy exceeding 1.48 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to said heat acting area;
- and
- said apparatus has a compulsory recovery mode for maintenance in which predischarge is performed onto a recording sheet conveyed from said recording sheet conveying mechanism by supplying more than 10.sup.5 shots of energy exceeding 1.48 times the minimum energy Eo necessary for discharging ink with bubbles formed by thermal energy applied to said heat acting area, thereby supplying a larger amount of energy than in the compulsory recovery mode during non-recording.
An ink jet recording apparatus comprising:
- a recording head having discharge energy generating elements and capable of performing a recovery operation of compulsorily discharging ink through discharge ports by driving said discharge energy generating elements at a discharge failure of said recording head as well as recording by discharging ink through said discharge ports by use of the energy obtained from said discharge energy generating elements;
- and
- driving energy control means for controlling the driving energy so that the amount of electrical energy for driving said discharge energy generating elements during the recovery operation may be more than or equal to 1.48 times the minimum amount of electrical energy necessary for driving said discharge energy generating elements during recording.
A recovery method for an ink jet recording apparatus comprising a recording head having discharge energy generating elements and capable of recording by discharging ink droplets through discharge ports by use of the energy obtained from said discharge energy generating elements, wherein at discharge failure of said recording head, ink is compulsory discharged through said discharge ports by supplying more than or equal to 1.48 times the minimum amount of electrical energy necessary for discharging ink using said discharge energy generating elements during recording.
Dependencies are inferred from the claim text.