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US 5,689,292 AGranted
Multi-step heating of a recording head
AssigneeCanon Kabushiki Kaisha
InventorsNaohisa Suzuki, Kazuhisa Kawakami, Junichi Yoshikawa
Life of this patent
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Abstract
A recording apparatus for recording an image on a recording material includes a heat generating element for controlling a temperature of a recording head, a driver for driving the heat generating element to generate heat, and control circuitry for controlling the driver to generate heat from the heat generating element with plural steps with a predetermined heat generating period, after completion of a recording operation by the recording head.
Claims32
A recording apparatus for recording an image on a recording material, the apparatus comprising:
- record control means for controlling a recording head to effect a recording operation;
- a heat generating element for controlling a temperature of the recording head;
- driving means for driving said heat generating element to generate heat;
- and
- control means for controlling said driving means to generate heat with said heat generating element with plural steps, each generating heat a plurality of times in a predetermined heat generating period, after completion of a recording operation, wherein energy applied to said heat generating element in a later step is smaller than energy applied to said heat generating element in an earlier step.
2 more elements
A recording apparatus for recording an image on a recording material, the apparatus comprising:
- record control means for controlling a recording head to effect a recording operation;
- a heat generating element for controlling a temperature of the recording head;
- driving means for driving said heat generating element to generate heat;
- and
- control means for controlling said driving means to drive said heat generating element with a first step after actuation of a main switch of said recording apparatus and before start of a recording operation and thereafter to drive said heat generating element with a second step, heat being generated in each of said first step and said second step a plurality of times in a predetermined heat generating period, wherein energy applied to said heat generating element in said second step is smaller than energy applied to said heat generating element in said first step.
2 more elements
A recording method for recording an image on a recording material, the method comprising the steps of:
- recording with a recording head;
- and
- performing a plurality of heat generating steps after said recording step by actuating a heat generating element for controlling the temperature of the recording head plural times so that heat is generated in each heat generating step a plurality of times in a predetermined heat generating period, wherein energy applied to said heat generating element in a later step is smaller than energy applied to said heat generating element in an earlier step.
A recording method for recording an image on a recording material, the method comprising the steps of:
- actuating a main switch of a recording apparatus;
- performing a first heat generating step after actuation of the main switch by driving a heat generating element for controlling a temperature of a recording head to generate heat before start of a recording operation;
- performing a second heat generating step when a predetermined condition is satisfied after said first heat generating step, wherein energy applied to the heat generating element in said second heat generating step is smaller than the energy applied to the heat generating element in said first heat generating step, and the heat generating element is driven in each of said first heat generating step and said second heat generating step to generate heat a plurality of times in a predetermined heat generating period;
- and
- recording using the recording head at least after said first heat generating step.
2 more elements
A recording apparatus for recording an image on a recording material, the apparatus comprising:
- record control means for controlling a recording head to effect a recording operation;
- a heat generating element for controlling a temperature of the recording head;
- driving means for pulsewisely driving said heat generating element to generate heat;
- control means for controlling said driving means to generate heat with said heat generating element with plural steps, each having a predetermined heat generating period, after completion of a recording operation;
- and
- counting means for counting a number of pulse drives in heating steps executed prior to the start of the recording operation, wherein when the number exceeds a predetermined number, said control means controls said driving means so that energy applied to said heat generating element in subsequent heat generating steps is smaller than energy applied to said heat generating element in a heat generating step executed before the start of a recording operation.
3 more elements
A recording apparatus for recording an image on a recording material, the apparatus comprising:
- record control means for controlling a recording head to effect a recording operation;
- a heat generating element for controlling a temperature of the recording head;
- driving means for pulsewisely driving said heat generating element to generate heat;
- control means for controlling said driving means to drive said heat generating element with a first step after actuation of a main switch of said recording apparatus and before start of a recording operation and thereafter to drive said heat generating element with a second step;
- and
- counting means for counting a number of pulse drives in said first step, wherein said control means controls said driving means to permit said second step to be carried out when the number of pulses reaches a predetermined number and energy applied to said heat generating element in said second step is smaller than energy applied to said heat generating element in said first step.
3 more elements
Dependencies are inferred from the claim text.