Patent ID: 9533850
Date: 2017-01-03
CPC Classifications: B65H,G03G

Claim:
1. An image forming apparatus comprising: paper feed rollers and conveyance rollers disposed sequentially from an upstream side along a conveyance path for a recording paper; a driving source configured to transmit a rotational power to the paper feed rollers and the conveyance rollers; a conveyance sensor disposed downstream of the conveyance rollers so as to measure a position and a conveyance velocity of the recording paper to be conveyed along the conveyance path; a control unit configured to detect that the recording paper has reached the conveyance sensor and configured to reduce a rotational velocity of the paper feed rollers; and a conveyance delay determination unit configured to calculate a conveyance delay quantity of the recording paper on the conveyance path and compare the conveyance delay quantity and a predetermined threshold when a conveyance delay of the recording paper is caused to occur after the control unit reduces the rotational velocity of the paper feed rollers based on the position and the conveyance velocity of the recording paper measured by the conveyance sensor, wherein when the conveyance delay determination unit indicates that the conveyance delay quantity exceeds the threshold, the driving source is configured to accelerate a rotational velocity of the paper feed rollers.