Patent ID: 7007941

Claim:
An image forming device comprising: a paper feeding apparatus to feed a paper having first and second sides and a front end; an image forming portion to form an image on the paper; a drive roller at a paper conveyance path and being rotated in a first direction to guide the paper from the paper feeding apparatus to the image forming portion; a feeding roller to convey the paper from the paper feeding apparatus to the image forming portion via the paper conveyance path; and a paper type distinguishing sensor disposed in the paper conveyance path upstream of the feeding roller in a direction of conveyance of the paper, to distinguish a type of the paper, and to output a distinguishing signal before the paper enters into the image forming portion, wherein the feeding roller is rotated in a second direction opposite the first direction while the drive roller is rotated in the first direction and conveying the paper along the conveyance path, the opposing rotation of the drive and feeding rollers aligning the front end of the paper to be parallel with an axis of the feeding roller, wherein the paper type distinguishing sensor distinguishes the type of the paper simultaneously with the aligning of the front end of the paper, and wherein the paper is bent to contact the paper type distinguishing sensor due to the rotation of the feeding roller in the second direction.