Patent ID: 8840240
Filing Date: 2014-09-23
Classification: B41J,B65H

Abstract:
1. A paper conveyance device for a printing device having a print head that prints information on conveyed continuous paper, the device comprising: a first conveyance mechanism that includes a tractor that sequentially engages holes formed in the continuous paper and conveys the continuous paper along a paper feed direction, a paper feed distance per unit time of the first conveyance mechanism being a reference paper feed distance per unit time; a second conveyance mechanism that includes a first feed roller and a first pressure roller, the second conveyance mechanism being disposed between the first conveyance mechanism and the print head in the paper feed direction, a paper feed distance per unit time of the second conveyance mechanism being greater than the reference paper feed distance per unit time; a third conveyance mechanism that includes a second feed roller and a second pressure roller, the third conveyance mechanism being disposed downstream in the paper feed direction from the print head, a paper feed distance per unit time of the third conveyance mechanism being greater than the reference paper feed distance per unit time; and a detector that includes a rotary encoder which detects a paper feed distance of the first conveyance mechanism and a rotation of the first feed roller, the paper feed distance of the first conveyance mechanism being adjusted based on the detected result; wherein a maximum paper holding force of the second conveyance mechanism based on the paper feed distance per unit time of the second conveyance mechanism is greater than a maximum paper holding force of the third conveyance mechanism based on the paper feed distance per unit time of the third conveyance mechanism.