Method and means for removing the trim from sheets to form blanks

Claim 1

MEANS FOR STRIPPING THE EXTERIOR TRIM FROM A SHEET COMPRISING: A PAIR OF CONTRAROTATING OPPOSED ROLLERS BIASED TOWARD CONTACT WITH ONE ANOTHER, FOR COVEYING A BLANK IN A PREDETERMINED DIRECTION; SAID ROLLERS BEING DESIGNED, CONSTRUCTED AND MOUNTED TO EXERT A PREDETERMINED FRICTIONAL PULLING FORCE ON SUCH SHEET; OPPOSED GRIPPING MEMBERS LOCATED ON OPPOSITE SIDES OF THE PATH OF A BLANK WHEN VIEWED EDGEWISE, SAID GRIPPING MEMBERS BEING LOCATED IN THE OPPOSITE OF SAID PREDETERMINED DIRECTION FROM SAID ROLLERS; SAID GRIPPING MEMBERS BEING ACTUABLE: FROM AN INACTIVE POSITION WHEREIN AT LEAST ONE OF SAID GRIPPING MEMBERS IS OUT OF CONTACT WITH SUCH SHEET, TO AN ACTIVE POSITION WHEREIN A SHEET THEREBETWEEN WOULD BE CLAMPED WITH A PREDETERMINED RESTRAINING FRICTIONAL PULLING FORCE LESS THAN SAID PREDETERMINED FRICTIONAL FORCE; AND MEANS RESPONSIVE TO THE MOVEMENT OF SUCH SHEET, TO ACTUATE SAID GRIPPING MEMBERS FROM SAID INACTIVE POSITION TO AN ACTIVE POSITION TO GRASP SAID SHEET, ADJACENT THE TRAILING EDGE THEREOF AND MEANS OPERABLE ON MOVEMENT OF THE USEFUL PORTION OF SAID SHEET AWAY FROM SAID GRIPPERS TO ACTUATE SAID GRIPPERS TO AN INACTIVE POSITION.