Paper feeding unit for image forming apparatus

Abstract

A paper feeding unit for supplying paper in a container to a printing engine in an image forming apparatus. The paper feeding unit comprises a pickup roller for transferring paper, a paper feeding unit to align the paper transferred by the pickup roller and to provide the paper to a printing engine. The paper feeding unit includes a first feeding roller and a second feeding roller, a feeding sensor for detecting the paper transferred to the paper feeding unit, and at least one driving power source for conveying power to the first feeding roller and the second feeding roller.

1 . An apparatus for transferring paper, comprising: 
 a pickup roller for transferring paper;    a paper feeding unit to align the paper transferred by the pickup roller and to provide the paper to a printing engine, the paper feeding unit including a first feeding roller and a second feeding roller;    a feeding sensor to detect the paper transferred to the paper feeding unit; and    at least one driving power source for operating the first feeding roller and the second feeding roller.    
   
   
       2 . The apparatus as recited in  claim 1 , wherein the driving power source is a motor which operates the first feeding roller and the second feeding roller simultaneously.  
   
   
       3 . The apparatus as recited in  claim 2 , further comprising: 
 a gear unit for conveying power from the motor to the first feeding roller and the second feeding roller.    
   
   
       4 . The apparatus as recited in  claim 3 , wherein the gear unit comprises: 
 a first gear for conveying the power from the motor to the first feeding roller; and    a second gear connected to the first gear and conveying the power from the first gear to the second feeding roller.    
   
   
       5 . The apparatus as recited in  claim 3 , wherein the gear unit comprises: 
 a gear for conveying the power from the motor to the first feeding roller; and    a belt unit connected to the gear and conveying the power from the gear to the second feeding roller.    
   
   
       6 . The apparatus as recited in  claim 5 , wherein the belt unit comprises a first pulley configured to power the first feeding roller, a second pulley configured to power the second feeding roller, and a timing belt set up between the first pulley and the second pulley.  
   
   
       7 . An apparatus for transferring paper, comprising: 
 a pickup roller for transferring paper;    a paper feeding unit to align the paper transferred by the pickup roller and to provide the paper to a printing engine, the paper feeding unit including a first feeding roller and a second feeding roller;    a feeding sensor to detect the paper transferred to the paper feeding unit;    at least one driving power source for operating the first feeding roller and the second feeding roller; and    at least one elastic member configured to press the first and second feeding rollers towards one another.    
   
   
       8 . The apparatus as recited in  claim 7 , wherein the driving power source is a motor which operates the first feeding roller and the second feeding roller simultaneously.  
   
   
       9 . The apparatus as recited in  claim 8 , further comprising: 
 a gear unit for conveying power from the motor to the first feeding roller and the second feeding roller.    
   
   
       10 . The apparatus as recited in  claim 9 , wherein the gear unit comprises: 
 a first gear for conveying the power from the motor to the first feeding roller; and    a second gear connected to the first gear and conveying the power from the first gear to the second feeding roller.    
   
   
       11 . The apparatus as recited in  claim 9 , wherein the gear unit comprises: 
 a gear for conveying the power from the motor to the first feeding roller; and    a belt unit connected to the gear and conveying the power from the gear to the second feeding roller.    
   
   
       12 . The apparatus as recited in  claim 11 , wherein the belt unit comprises a first pulley configured to power the first feeding roller, a second pulley configured to power the second feeding roller, and a timing belt set up between the first pulley and the second pulley.  
   
   
       13 . An apparatus for transferring paper, comprising: 
 a pickup roller for transferring paper;    a paper feeding unit to align the paper transferred by the pickup roller and to provide the paper to a printing engine, the paper feeding unit including a first feeding roller and a second feeding roller;    a feeding sensor to detect the paper transferred to the paper feeding unit;    at least one driving power source for operating the first feeding roller and the second feeding roller; and    a gear unit for conveying power from the motor to the first feeding roller and the second feeding roller.    
   
   
       14 . The apparatus as recited in  claim 13 , wherein the driving power source is a motor which operates the first feeding roller and the second feeding roller simultaneously.  
   
   
       15 . The apparatus as recited in  claim 13 , further comprising: 
 at least one elastic member configured to press the first and second feeding rollers towards one another.    
   
   
       16 . The apparatus as recited in  claim 13 , wherein the gear unit comprises: 
 a first gear for conveying the power from the motor to the first feeding roller; and    a second gear connected to the first gear and conveying the power from the first gear to the second feeding roller.    
   
   
       17 . The apparatus as recited in  claim 13 , wherein the gear unit comprises: 
 a gear for conveying the power from the motor to the first feeding roller; and    a belt unit connected to the gear and conveying the power from the gear to the second feeding roller.    
   
   
       18 . The apparatus as recited in  claim 17 , wherein the belt unit comprises a first pulley configured to power the first feeding roller, a second pulley configured to power the second feeding roller, and a timing belt set up between the first pulley and the second pulley.