Patent ID: 8191451

Claim:
An apparatus for positioning a blade ( 30 ) vertically with a lower anvil ( 34 ) and applying vertical force for conversion to horizontal force by an attached side shift mechanism against said lower anvil ( 34 ) for use in a web slitter comprising; a) a carriage assembly b) a device coupled to the carriage assembly ( 11 ) for applying a predetermined vertical force comprising; i) a sleeve ( 48 ) having a first and second end and a dovetail fitting ( 52 ) mounted to said first end of said sleeve ( 48 ) for providing structural connection of parts; ii) a first motor ( 26 ) equipped with discrete incremental movement for controlling vertical force attached to said second end of said sleeve ( 48 ); iii) a follower ( 502 ) engaged with said first motor ( 26 ) for translating rotational movement of said first motor into vertical motion; iv) a first spring ( 47 ) having a first and second end located vertically in said sleeve ( 48 ), said first end in contact with said follower ( 502 ) for converting vertical motion of said follower ( 502 ) into force; v) a plunger ( 50 ) vertically guided by said dovetail fitting ( 52 ) located at said second end of said first spring ( 47 ) for receiving said force; vi) a lever ( 68 ) pivotally attached to said dovetail fitting ( 52 ) located underneath said vertically guided plunger ( 50 ) for receiving said force for transferring said force to a side shift mechanism; vii) a pin ( 60 ) vertically guided by said dovetail fitting ( 52 ) having a first and second end, said first end engaged with said lever ( 68 ) for following said lever ( 68 ); vii) a first sensor ( 64 ) for sensing said second end of said vertically guided pin ( 60 ) for controlling first motor ( 26 ) position; c) a device for discrete incremental movement of said upper blade ( 30 ) in a vertical direction comprising: i) a second motor ( 20 ) equipped with discrete incremental movement for controlling vertical movement; ii) a second vertical shaft ( 44 ) coupled to said second motor ( 20 ) for transmitting discrete incremental movement; iii) a threaded sleeve ( 46 ) having a first and second end, said first end engaged with said second vertical shaft ( 44 ) for transmitting said discrete incremental movement of said second vertical shaft ( 44 ) into vertical motion and said second end rigidly attached to said dovetail fitting ( 52 ) for transferring said vertical motion to said dovetail fitting ( 52 ); iv) a second sensor ( 62 ) for sensing said dovetail fitting ( 52 ) in a specific position for controlling second motor ( 20 ) position.