Patent ID: 6796456
Filing Date: 2004-09-28
Classification: B27D,B32B,B65H

Abstract:
Apparatus of registering two sheets comprising:a first conveyer for moving a first sheet along a first path; first sensor means disposed at a first predetermined position adjacent to the downstream end of said first conveyer as seen in the moving direction of the first sheet for detecting the arrival of the leading end of the first sheet moved by said first conveyer at said first predetermined position and generating a detection signal in response to detection of such arrival; a second conveyer disposed above said first conveyer for moving a second sheet along a second path at substantially the same speed as the first sheet moved by the first conveyer; second sensor means disposed at a second predetermined position adjacent to the downstream end of said second conveyer as seen in the moving direction of the second sheet for detecting the arrival of the leading end of the second sheet moved by the second conveyer at said second predetermined position and generating a detection signal in response to detection of such arrival; a third conveyer disposed so as to form a conveying path continuing from said first path, said second path of the second conveyer being directed in a convergent manner with respect to said first path of the first conveyer so that the second sheet coming out from the second conveyer is laid on the first sheet coming out from the first conveyer and the two sheets one laid on the other are transferred onto the third conveyer, said third conveyer being operable to move the sheets at substantially the same speed as the first sheet moved by the first conveyer; a control operable to control the operation of said first and second conveyers in response to said detection signals from the first and second sensor means so that the first and second conveyers are stopped when the arrival of the leading ends of the first and second sheets at the respective first and second predetermined positions are detected by the first and second sensor means, respectively, and also that after both sheets have been stopped the first and second conveyers are restarted in such controlled timing that the second sheet is laid on the first sheet in an overlapped relation wherein the leading end of the second sheet is positioned forward of the leading end of the first sheet; and registration stop means having a stop surface extending perpendicularly to said conveying path of the third conveyer and movable between the operative position thereof where said stop surface is placed so as to stop the sheets moved by the third conveyer at their leading ends and the inoperative position thereof where said stop surface is retracted away from said conveying path of the third conveyer, whereby firstly the second sheet is stopped at the leading end thereof by the stop surface and subsequently the first sheet is stopped at the leading end by the stop surface, thus both sheets being registered with the leading ends aligned against the stop surface of the registration stop means.