Patent ID: 8040575
Filing Date: 2011-10-18
Classification: H04N

Abstract:
1. A double side image scanner comprising: a case having a top surface and a guide track provided on the top surface for guiding a medium, the guide track having a reference loading line; a main frame mounted inside the case; a first roll feed including a first feed roller mounted on a front side of the guide track and a first idle roller disposed above the first feed roller for cooperating with the first feed roller to load the medium; a second roll feed including a second feed roller mounted on a rear side of the guide track and a second idle roller disposed above the second feed roller for cooperating with the second feed roller to load the medium; a drive means for rotating the first feed roller and the second feed roller; a first image sensor provided on the guide track between the first feed roller and the second feed roller for scanning one surface of the medium to acquire image data; a second image sensor provided between the first idle roller and the second idle roller for scanning the other surface of the medium to acquire image data; a tracking means provided at one side of the main frame for pushing and biasing a first flank end of the medium toward the reference loading line to bring a second flank end of the medium into alignment with the reference loading line; a moving frame rotatably connected to a rear end of the main frame; and a pressing means vertically movably mounted on a bottom portion of the moving frame for pressing the medium against the guide track, wherein the pressing means comprises: an inner pressing cover vertically movably mounted on the bottom portion of the moving frame for pressing the medium into planar shape, wherein the inner pressing cover defines a medium loading track between the guide track and a lower surface of the inner pressing cover, wherein the first idle roller and the second idle roller protrude downwardly through the inner pressing cover, and wherein the second image sensor is exposed to the medium loading track through the inner pressing cover; first and second brackets respectively secured to front and rear sides of the inner pressing cover, each of the first and second brackets having first and second guide slots extending along opposite flank sides of a corresponding one of the first and second brackets; a first shaft vertically movably inserted at opposite ends into the first guide slots of the first and second brackets; a second shaft vertically movably inserted at opposite ends into the second guide slots of the first and second brackets; and a spring means for resiliently biasing the inner pressing cover to press the medium.