Abstract: A sheet transport apparatus includes the first transport rollers, the second transport rollers arranged at downstream of the first transport rollers to receive a sheet transported from the first transport rollers, a spacing device for setting the first transport rollers to a sheet nipping state or a sheet released state, a sheet detection device for detecting a sheet length in a transport direction, and a comparing device for comparing the sheet length detected by the sheet detection device with a predetermined length. It is controlled such that the spacing device is activated to switch the first transport rollers from a sheet nipping state to a sheet released state after the sheet is transported by a predetermined distance when the sheet length is longer than the predetermined length, and to maintain the first transport rollers in the sheet nipping state when the sheet length is shorter than the predetermined length.

Abstract: A sheet supply apparatus includes a sheet storage device for stacking and storing sheets; a sheet pick-up device for drawing the sheets from the sheet storage means; a separating device having supply rollers for supplying the sheets drawn from the sheet pick-up means and separating members pressing the supply rollers; a pair of resister rollers for supplying the sheets to an aligning device after resister correction for aligning a transport direction of the sheets separated and transported by the separating device; and a frame for supporting each of the devices. The sheet supply apparatus is also provided with the first press separating device for the supply rollers and the separating members to be in a sheet nipping state or a sheet released state, and the second press separating device for the pair of the resister rollers to be in a sheet nipping state or a sheet released state.

Abstract: A sheet transport apparatus includes the first transport rollers, the second transport rollers arranged at downstream of the first transport rollers to receive a sheet transported from the first transport rollers, a spacing device for setting the first transport rollers to a sheet nipping state or a sheet released state, a sheet detection device for detecting a sheet length in a transport direction, and a comparing device for comparing the sheet length detected by the sheet detection device with a predetermined length. It is controlled such that the spacing device is activated to switch the first transport rollers from a sheet nipping state to a sheet released state after the sheet is transported by a predetermined distance when the sheet length is longer than the predetermined length, and to maintain the first transport rollers in the sheet nipping state when the sheet length is shorter than the predetermined length.

Abstract: A sheet supply apparatus includes a sheet storage device for stacking and storing sheets; a sheet pick-up device for drawing the sheets from the sheet storage means; a separating device having supply rollers for supplying the sheets drawn from the sheet pick-up means and separating members pressing the supply rollers; a pair of resister rollers for supplying the sheets to an aligning device after resister correction for aligning a transport direction of the sheets separated and transported by the separating device; and a frame for supporting each of the devices. The sheet supply apparatus is also provided with the first press separating device for the supply rollers and the separating members to be in a sheet nipping state or a sheet released state, and the second press separating device for the pair of the resister rollers to be in a sheet nipping state or a sheet released state.