Paper convey method and device in image forming apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorMasanaka Mizuno
Life of this patent
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Abstract
In a paper convey method and device in an image forming apparatus according to this invention, a first sensor detects that the first paper sheet is fed from a paper feed unit, and a CPU outputs a control signal defining a desired cycle time at which paper sheets should be conveyed. A second sensor then detects the timing at which each paper sheet passes near a reverse motor in a reverse/paper discharge unit. The same or another CPU compares the timing of the passage of each paper sheet with the cycle time defined by the control signal and determines a delay or advance for each paper sheet. The desire cycle time is realized by controlling the reverse motor and a paper discharge motor in accordance with the determination result.
Claims6
A paper convey device for conveying a paper sheet in an image forming apparatus, comprising:
- a paper feed unit which feeds a paper sheet;
- a first sensor which is placed near an exit of said paper feed unit, detects passage of a first paper sheet, and outputs a first detection signal;
- a first CPU which receives the first detection signal to generate a control signal defining a desired cycle time at which the respective paper sheets should be conveyed;
- a reverse/paper discharge unit which, upon reception of the paper sheet, reverses a direction of a paper sheet by using a reverse motor, and discharges the paper sheet by using a paper discharge motor;
- a second sensor which is placed near the reverse motor in said reverse/discharge unit, detects passage of each paper sheet, and outputs a second detection signal, and
- a second CPU which receives the control signal and the second detection signal, compares a timing of passage of each paper sheet with the cycle time defined by the control signal, determines a delay or an advance for each paper sheet, and controls the reverse motor in accordance with the determination result.
A paper convey method of conveying a paper sheet in an image forming apparatus, comprising:
- the step of detecting that a first paper sheet is fed from a paper feed unit;
- the step of, when feeding of the first paper sheet is detected, generating a control signal defining a desired cycle time at which the respective paper sheets should be conveyed;
- the step of, when each paper sheet is fed, detecting a timing at which the paper sheet passes near an entrance of a reverse unit of a reverse/paper discharge unit which reverses a direction of the paper sheet by using a reverse motor and discharges the paper sheet;
- and
- the step of comparing the timing at which each of the paper sheets passes with the cycle time defined by the control signal, determining a delay or an advance for each paper sheet, and controlling the reverse motor in accordance with the determination result.
A paper convey method of conveying a paper sheet in an image forming apparatus, comprising:
- the step of, when a paper sheet is fed from a paper feed unit, causing a first sensor placed near an exit of the paper feed unit to detect that a first paper sheet is fed;
- the step of, when feeding of the first paper sheet is detected, causing a first CPU to output a control signal defining a desired cycle time at which the respective paper sheets should be conveyed;
- the step of, when each paper sheet is fed, causing a second sensor placed near a reverse motor to detect a timing at which the paper sheet passes in a reverse/paper discharge unit which reverses a direction of the paper sheet by using the reverse motor and discharges the paper sheet by using a discharge motor;
- and
- the step of causing a second CPU to compare the timing at which each of the paper sheets passes with the cycle time defined by the control signal, determine a delay or an advance for each paper sheet, and control the reverse motor and the paper discharge motor in accordance with the determination result.
Dependencies are inferred from the claim text.