Patent ID: 6236824
Filing Date: 2001-05-22
Classification: G03G

Abstract:
A shutter assembly for a paper path of a single sheet printing or copying device, the shutter assembly comprising:a first shutter pivotably mounted to the device about a first axis, the first shutter including a first guide surface for the paper path when the first shutter is in a first operating position, the first shutter being pivotable to a first open position wherein the first guide surface is clear of the paper path, the first shutter being connected to a locking rod which releasably engages the device for locking the first shutter in the first operating position;a second shutter pivotably mounted to the device about a second axis, the second shutter including a second guide surface for the payper path that is in alignment with the first guide surface of the first shutter when the second shutter is in a second operating position, the second shutter being pivotable between the second operating position and a second open position wherein the second guide surface of the second shutter is clear of the paper path;at least one tension element connected to the second shutter that biases the second shutter towards the second open position;the first shutter engaging the second shutter when the first shutter is in the first operating position and the first shutter effectively locking the second shutter in the second operating position when the first shutter is locked into the first operating position by the locking rod;the second shutter being pivotably connected to the first shutter at the second axis, andthe tension element including a tension spring with one end connected to the first shutter and a second end connected to the second shutter.