Paper aligning apparatus for printer

Abstract

A paper aligning apparatus includes a paper tray, a plurality of blocking tabs, and an ordering block. The paper tray includes a stack of paper. The paper tray includes a first edge and a second edge. The plurality of blocking tabs is located on the paper tray and adjacent the first edge. The plurality of blocking tabs is aligned in a line. The ordering block is movably mounted on the paper tray and adjacent to the second edge. The ordering block pushes the stack of paper in the paper tray so that the plurality of blocking tabs resist against the stack of paper.

What is claimed is: 
     
         1 . A paper aligning apparatus, comprising:
 a paper tray configured to hold a stack of paper, the paper tray comprising a first edge and a second edge;   a plurality of blocking tabs located on the paper tray and adjacent to the first edge, the plurality of blocking tabs being aligned in a line; and   an ordering block movably mounted on the paper tray and adjacent to the second edge, wherein the ordering block is configured to push the stack of paper in the paper tray so that the plurality of blocking tabs resist against the stack of paper to align the stack of paper.   
     
     
         2 . The paper aligning apparatus of  claim 1 , further comprising a motor and an inactive gear mounted on the paper tray, wherein the motor comprises an active gear, a transmission belt is set on the active gear and the inactive gear, an inner side of the transmission belt comprises a plurality of transmission teeth; the ordering block defines a tooth slot, one tooth of the plurality of transmission teeth is engaged in the tooth slot, and the motor is configured to rotate to move the ordering block together with the transmission belt. 
     
     
         3 . The paper aligning apparatus of  claim 2 , wherein the motor is mounted on a bottom side of the paper tray and adjacent to the first edge. 
     
     
         4 . The paper aligning apparatus of  claim 3 , wherein a securing member is mounted on the bottom side of the paper tray and adjacent to the second edge, the securing member comprises a first piece and a second piece, the first piece and the second piece defines pivot holes, the inactive gear comprises a shaft, the inactive gear is between the first piece and the second piece, and the shaft is inserted into the pivot holes to pivotally mount the inactive gear on the securing member. 
     
     
         5 . The paper aligning apparatus of  claim 4 , wherein the paper tray defines an opening adjacent to the second edge, the ordering block comprises a guiding piece, the guiding piece defines a receiving slot communicating with the tooth slot, the guiding piece is configured to be inserted through the opening, and the transmission belt is configured to be inserted through the receiving slot. 
     
     
         6 . The paper aligning apparatus of  claim 1 , wherein a sliding foot is mounted on the ordering block, the sliding foot comprises a sliding piece, the paper tray defines a guiding groove, and the sliding piece is configured to slide in the guiding groove. 
     
     
         7 . The paper aligning apparatus of  claim 6 , wherein the ordering block defines an inserting hole, the sliding foot comprises an inserting post, and the inserting post is inserted into the inserting hole. 
     
     
         8 . The paper aligning apparatus of  claim 1 , wherein a first sensor is mounted on the paper tray and adjacent to the first edge, a reflecting piece is mounted on the ordering block, the first sensor is configured to emit light on a topmost piece of paper of the stack of paper and to detect light reflected back from the topmost piece of paper and the reflecting piece, and the first sensor is further configured to control movements of the ordering block according the light reflected back to the first sensor. 
     
     
         9 . The paper aligning apparatus of  claim 1 , wherein a second sensor is mounted on the paper tray, the second sensor is adapted to control the movements of the ordering block when the second sensor is covered. 
     
     
         10 . A paper aligning apparatus, comprising:
 a paper tray configured to hold a stack of paper, the paper tray comprising a first edge and a second edge;   a plurality of blocking tabs located on the paper tray and adjacent to the first edge, the plurality of blocking tabs being aligned in a line;   an ordering block movably mounted on the paper tray and adjacent to the second edge;   a first sensor mounted on the paper tray and adjacent to the first edge; and   a reflecting piece mounted on the ordering block;   wherein the first sensor is adapted to emit light on a topmost piece of paper of the stack of paper and to detect light reflected by the topmost piece of paper and the reflecting piece, and the first sensor is adapted to control movements of the ordering block to align the stack of paper.   
     
     
         11 . The paper aligning apparatus of  claim 10 , wherein a motor and an inactive gear are mounted on the paper tray, the motor comprises an active gear, a transmission belt is set on the active gear and the inactive gear, an inner side of the transmission belt comprises a plurality of transmission teeth; the ordering block defines a tooth slot, one tooth of the plurality of transmission teeth is engaged in the tooth slot, and the motor is configured to rotate to move the ordering block together with the transmission belt. 
     
     
         12 . The paper aligning apparatus of  claim 11 , wherein the motor is mounted on a bottom side of the paper tray and adjacent to the first edge. 
     
     
         13 . The paper aligning apparatus of  claim 12 , wherein a securing member is mounted on the bottom side of the paper tray and adjacent to the second edge, the securing member comprises a first piece and a second piece, the first piece and the second piece defines pivot holes, the inactive gear comprises a shaft, the inactive gear is located between the first piece and the second piece, and the shaft is configured to be inserted into the pivot holes to pivotally mount the inactive gear on the securing member. 
     
     
         14 . The paper aligning apparatus of  claim 13 , wherein the paper tray defines an opening adjacent to the second edge, the ordering block comprises a guiding piece, the guiding piece defines a receiving slot communicating with the tooth slot, the guiding piece is configured to be inserted through the opening, and the transmission belt is inserted through the receiving slot. 
     
     
         15 . The paper aligning apparatus of  claim 10 , wherein a sliding foot is mounted on the ordering block, the sliding foot comprises a sliding piece, the paper tray defines a guiding groove, and the sliding piece is configured to slide in the guiding groove. 
     
     
         16 . The paper aligning apparatus of  claim 15 , wherein the ordering block defines an inserting hole, the sliding foot comprises an inserting post, and the inserting post is inserted in the inserting hole. 
     
     
         17 . The paper aligning apparatus of  claim 10 , wherein a second sensor is mounted on the paper tray, the second sensor is adapted to control the movements of the ordering block to align the stack of paper when the second sensor is covered.