Incremental printing of symbolic information – Ink jet – Medium and processing means
Utility Patent
1997-01-06
2001-01-02
Barlow, John (Department: 2853)
Incremental printing of symbolic information
Ink jet
Medium and processing means
C271S110000, C400S314600, C400S550000
Utility Patent
active
06169557
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a recording apparatus for performing a recording operation on a recording medium using a recording means and, more particularly, to a recording apparatus having a function of feeding the recording medium.
2. Description of the Related Art
A paper feed operation in a recording apparatus of this type is realized by energizing/deenergizing a spring clutch of a drive power transmission unit by a power source such as a plunger.
In order to perform the paper feed operation, the power source such as a plunger must be arranged, and an apparatus size tends to be increased. In addition, timing control of the power source is also necessary, and a control section of the apparatus tends to be complicated.
In order to eliminate the above drawbacks, a system has been presented for starting a paper feed operation by energizing a spring clutch upon operation of a carriage while omitting a plunger for the purpose of a decrease in cost and the like in an apparatus having a carriage which carries a recording head, as in (Japanese Patent Application No. 63-9274 filed on Jan. 19, 1988).
In this system, a lock ring of the spring clutch arranged outside a recording region defined by the movement of the carriage is locked or released (rotatable) by a lock pawl so as to cooperate a separation roller and a pressing plate mounting recording paper, thus ON/OFF-controlling a paper feed operation. More specifically, a portion of the carriage is brought into dynamic contact with the lock pawl to release engagement of the lock ring by the lock pawl, thus setting the lock ring to be rotatable. When the lock ring is set to be rotatable, the spring clutch can transmit a rotational force, and the paper feed operation is started.
In this system, the lock pawl is located at a position (to be referred to as a paper feed position hereinafter) opposite to the home position of the carriage outside the recording region to prevent that the carriage accidentally releases engagement of the lock pawl every time it is moved to perform a recording operation. Therefore, when the lock pawl is released, the carriage is moved from the home position to the paper feed position.
A distance between the recording region and the paper feed position is minimized to reduce a moving range of the carriage as much as possible and to make the apparatus compact.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a compact recording apparatus.
It is another object of the present invention to provide a recording apparatus which can reliably feed a recording medium.
It is still another object of the present invention to provide a recording apparatus which can precisely determine a feed timing of a recording medium.
It is still another object of the present invention to provide a recording apparatus which can reduce cost.
It is still another object of the present invention to provide a recording apparatus which can eliminate a lock-pawl release error by performing a clock release operation by a carriage a plurality of times, and can reliably feed thick recording paper.
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Aichi Takao
Hashimoto Tamaki
Suzuki Tetsuo
Barlow John
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Hallacher Craig A.
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