Electrostatic transmission mechanism

Abstract

An electrostatic transmission mechanism can be adopted for use in data media recorders such as printers, facsimile machines, or scanners to transport media. The invention has a feed roller with an electrostatic field generator located therein to generate static electricity on the surface of the feed roller to attract and transport media. The invention can eliminate the disadvantages of conventional transmission mechanisms such as crumpled paper resulting from the pressing of the feed rollers, star wheel tracks on the paper caused by the star wheels, etc.

What is claimed is:  
     
         1 . An electrostatic transmission mechanism for data media recorders to transport a paper through feeding, printing and discharging operations, comprising: 
 a feed roller driven to rotate by a driving apparatus of the data media recorders to transport the paper; and    an electrostatic field generator connecting electrically to the feed roller to generate static electricity on the surface of the roller to attract the paper and to allow the paper to move on the surface of the feed roller in a flat and smooth manner.    
     
     
         2 . The electrostatic transmission mechanism of  claim 1 , wherein the electrostatic field generator includes: 
 a power supply which has a positive pole and negative pole; and    two pairs of conductive wires crossing with one another and being laid on the surface of the feed roller, and connecting respectively to the positive pole and the negative pole of the power supply for generating static electricity.    
     
     
         3 . The electrostatic transmission mechanism of  claim 2 , wherein the conductive wires are covered by an insulation layer.  
     
     
         4 . The electrostatic transmission mechanism of  claim 3 , wherein the intensity of the electrostatic field is determined by the thickness of the insulation layer.  
     
     
         5 . The electrostatic transmission mechanism of  claim 2 , wherein the intensity of the electrostatic field is determined by the output voltage of the power supply.  
     
     
         6 . The electrostatic transmission mechanism of  claim 2 , wherein the intensity of the electrostatic field is determined by the density of the conductive wires and wiring configurations of the conductive wires.  
     
     
         7 . The electrostatic transmission mechanism of  claim 2  further having a roller seat to control exposed areas of the feed roller and re-direction of the paper transportation.  
     
     
         8 . An electrostatic transmission mechanism for data media recorders having a feed roller to transport media required by the data media recorders, characterized by: 
 two pairs of conductive wires crossing with one another and being laid on the surface of the feed roller and said conductive wires connecting to a power supply to generate static electricity on the feed roller to attract and transport the media.    
     
     
         9 . The electrostatic transmission mechanism of  claim 8 , wherein the conductive wires are covered by an insulation layer.  
     
     
         10 . The electrostatic transmission mechanism of  claim 9 , wherein the intensity of the electrostatic field is determined by the thickness of the insulation layer.  
     
     
         11 . The electrostatic transmission mechanism of  claim 8 , wherein the intensity of the electrostatic field is determined by the density of the conductive wires and wiring configurations of the conductive wires.  
     
     
         12 . The electrostatic transmission mechanism of  claim 8  further having a roller seat to control exposed areas of the feed roller and re-direction of the paper transportation.