Printing apparatus capable of distinguishing functioning abnormalities
AssigneeCanon Kabushiki Kaisha
InventorHiroshi Nishikawa
Life of this patent
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Abstract
There is described a printer with a mechanism for detecting abnormality in the printing mechanism such as a type font wheel. The detection at the start of power supply is effected with a criterion different from that in the course of printing operation, in order to simplify the operation for the initial errors encountered at the start of power supply.
Claims30
A printer for recording on a recording medium, comprising:
- recording means for recording on a recording medium;
- error detecting means for detecting an erroneous drive of said printer;
- a voltage source;
- storing means for storing a predetermined time period;
- and
- operating means for operating said error detecting means such that an error lock operation in accordance with error detection is prohibited for the predetermined time period when said error detecting means detects an error initially after turning on said voltage source, and for releasing the prohibition of the operation in accordance with the error detection when the operation of said error detecting means is normal in operation.
A printer for recording on a recording medium, comprising:
- error detecting means for detecting abnormal driving of said printer;
- a voltage source;
- storing means for storing a predetermined time period;
- and
- operating means for operating said error detecting means such that an error lock operation based on error detection is prohibited during the predetermined time period after said voltage source is turned on.
A recording method for recording on a recording medium with a printer, said method comprising the steps of:
- detecting abnormal driving of the printer with an error detecting device;
- supplying a voltage source to the printer;
- storing a predetermined time period;
- and
- operating the error detecting device such that an error lock operation based on error detection is prohibited during the predetermined time period after the voltage is turned on.
A method for recording on a recording medium with a printer, said method comprising the steps of:
- recording on a recording medium;
- detecting an erroneous drive of the printer with an error detecting device;
- supplying a voltage source to the printer;
- storing a predetermined time period;
- and
- operating the error detecting device such that an error lock operation in accordance with error detection is prohibited for the predetermined time period when the error detecting device detects an error initially after turning on the voltage source, and for releasing the prohibition of the operation in accordance with the error detection when the operation of the error detecting device is normal in operation.
Dependencies are inferred from the claim text.