Patent ID: 8240595
Filing Date: 2012-08-14
Classification: B65H

Abstract:
1. A paper feeder for accommodating a rolled paper to be pulled out comprising: a first support surface having a first friction coefficient between the first support surface and the rolled paper, the first surface and the rolled paper producing a first contact force when the rolled paper moves on the first support surface; a second support surface having a second friction coefficient larger than the first friction coefficient between the second support surface and the rolled paper, the second support surface and the rolled paper producing a second contact force when the rolled paper moves on the second support surface; a container section, within which the rolled paper is freely movable, composed of the first support surface and the second support surface; the rolled paper contacting both first and second support surfaces simultaneously a paper guide adapted to guide a paper taken out of the rolled paper in a direction that the first contact force is strengthened; and a motor adapted to move the rolled paper in a speed-up period and/or a slow-down period; wherein the first contact force produced by the rolled paper pressings against the first support surface while paper of the roll is taken from the container section is larger than the first contact force in a stationary state of the rolled paper in the container section, the second contact force produced by the rolled paper pressing against the second support surface while paper of the roll is taken out of the container section is smaller than the second contact force in the stationary state of the rolled paper in the container section, and the second contact force produced in the stationary state of the rolled paper in the container section is larger than the first contact force produced in the stationary state of the rolled paper in the container section such that print quality deterioration is reduced during speed-up and slow-down periods of the motor.