Patent ID: 6422112
Filing Date: 2002-07-23
Classification: B26D,Y10T

Abstract:
A machine for cutting stacked sheets of stock, comprising: a counter with a rear side for receiving the stock to be cut; said counter having a front side for receiving stock that has been cut; means for advancing a stack of sheets of stock and an abutment for resting one side of the stack against said abutment; a bent positioned above said counter and receiving a blade for cutting the stock; a holdfast lowerable onto a top side of the stack; a control panel and a display panel positioned on said front side; at least one monitoring camera on said rear side of said counter for monitoring positions of said stock in relation to said stack advancing means and displaying on said display panel a real-time image discernable by said camera for correcting positions of said stock due to imprecise location of said stock against said stack advancing means or said abutment; a screen on said display panel for displaying the real-time image picked up by said monitoring camera; said real-time image replacing at least some graphical symbols on said screen; said real-time image being displayed only while the stock is being aligned in relation to said stack-advancing means or said abutment; said blade being prevented from cutting the stock when aligned incorrectly in relation to said stack-advancing means or said abutment; a plurality of cameras distributed over a width of said rear side of said counter; at least one camera monitoring said rear side of said counter from a specific location; said stack-advancing means being spaced from said abutment by a gap, said at least one camera monitoring said rear side of said counter through said gap; means for moving said at least one monitoring camera back and forth in relation to said rear side of said counter; said at least one monitoring camera being mounted on said stack-advancing means and traveling along with said stack-advancing means; said at least one monitoring camera having a top image pickup position and a bottom image pickup position, said at least one camera pivoting between said top image pickup position and said bottom image pickup position; a lens with a variable focal length in said at least one monitoring camera; image processor means connected to said at least one monitoring camera and calculating the stock position in relation to said stack-advancing means or to said abutment.