Paper-feeding mechanism capable of adjusting skew print media

Abstract

A paper-feeding mechanism includes an input roller for picking up a print medium, a pinch input roller for nipping the print medium with the input roller, and a deskew shutter installed on a side of the input roller and the pinch input roller. The deskew shutter includes a flexible pad for blocking the print medium before the print medium is nipped by the input roller and the pinch input roller so as to adjust the skew print medium. The paper-feeding mechanism further includes an elastic component connected to the deskew shutter for providing an elastic force to the deskew shutter. The deskew shutter is connected to the elastic component in a rotatable manner.

1 . A paper-feeding mechanism comprising:
 an input roller for picking up a print medium;   a pinch input roller for nipping the print medium with the input roller;   a deskew shutter installed on a side of the input roller and the pinch input roller, the deskew shutter comprising a flexible pad for blocking the print medium before the print medium is nipped by the input roller and the pinch input roller so as to adjust the skew print medium; and   an elastic component connected to the deskew shutter for providing an elastic force to the deskew shutter, the deskew shutter being connected to the elastic component in a rotatable manner.   
     
     
         2 . The paper-feeding mechanism of  claim 1  wherein the deskew shutter comprises a baffle and the flexible pad is disposed on the baffle. 
     
     
         3 . The paper-feeding mechanism of  claim 1  wherein the flexible pad is made of polyethylene (PE) forming material. 
     
     
         4 . The paper-feeding mechanism of  claim 1  wherein the flexible pad is made of sponge material. 
     
     
         5 . The paper-feeding mechanism of  claim 1  wherein the flexible pad continues blocking the print medium after the print medium is nipped by the input roller and the pinch input roller so as to prevent the print medium from dropping from the deskew shutter. 
     
     
         6 . The paper-feeding mechanism of  claim 1  wherein the elastic component is a spring. 
     
     
         7 . The paper-feeding mechanism of  claim 1  further comprising:
 a paper tray for positioning the print medium; and   a pickup roller installed in front of the paper tray for picking up the print medium to the input roller and the pinch input roller.