Recording medium feeding method and image recording apparatus

A method for feeding a recoding medium for use in an image recording apparatus including a sheet-feeding path, a feeding device disposed at an upstream side of the sheet-feeding path and having a rotation sensor, a pair of rollers for nipping the recording medium and a recording device disposed at a downstream side of the sheet-feeding path to record an image on the recording medium to be fed, the method comprising the steps of:

• feeding the recording medium along the sheet-feeding path by a unit feeding amount;
• detecting an entrance of a rear end of the recording medium into a jumping alarm area;
• dividing the unit feeding amount into minute divisional feeding amounts such that the recording medium is fed by each minute divisional feeding amount when the rear end of the recording medium enters the jumping alarm area;
• and
• adjusting the minute divisional feeding amount by a predetermined compensation amount when the recording medium is equal to or smaller than a predetermined size.

A method for feeding a recoding medium for use in an image recording apparatus including a sheet-feeding path, a feeding device disposed at an upstream side of the sheet-feeding path and having a rotation sensor, a pair of rollers for nipping the recording medium, a recording device disposed at a downstream side of the sheet-feeding path to record an image on the recording medium to be fed and a size determining device for determining a size of the recording medium, the method comprising the steps of:

• feeding the recording medium along the sheet-feeding path by a unit feeding amount;
• detecting an entrance of a rear end of the recording medium into a jumping alarm area;
• dividing the unit feeding amount into minute divisional feeding amounts such that the recording medium is fed by each minute divisional feeding amount when the rear end of the recording medium enters the jumping alarm area;
• and
• adjusting the minute divisional feeding amount by a predetermined compensation amount when the recording medium is equal to or smaller than a predetermined size.

An image recording apparatus for recording an image on a recording medium, comprising:

• a sheet-feeding path;
• a feeding device including a pair of rollers disposed at an upstream side of the sheet-feeding path to nip the recording medium and to feed the recording medium along the sheet-feeding path by a unit feeding amount;
• a recording device disposed at a downstream side of the sheet-feeding path to record the image on the recording medium;
• a position sensor that detects a position of a rear end of the recording medium being fed;
• a rotation sensor that detects a rotation of the roller;
• and
• a controller that controls the rotation of the roller, the controller including a first controlling part for controlling the rotation of the roller such that the unit feeding amount is divided into a plurality of minute divisional feeding amounts and the recoding medium is fed by a corresponding minute divisional feeding amount when the end of the recording medium enters a jumping alarm area, and a second controlling part for controlling the rotation of the roller such that, when a jumping phenomenon occurs in the recording medium, a jumping amount of the recording medium is estimated based on the revolution of the rotation sensor to cancel the jumping amount.