Multi-ply web forming apparatus with edge aligning means

Claim 1

IN APPARATUS FOR UNITING PAPER WEBS IN SUPERPOSED RELATION TO FORM MULTI-PLY PAPER STRIP, AND OF THE TYPE INCLUDING MEANS FOR PORGRESSIVELY WITHDRAWING A FIRST LINER WEB FROM A SUPPLY, MEANS FOR PROGRESSIVELY WITHDRAWING A MEDIUM WEB FROM A SUPPLY, MEANS FOR PROGRESSIVELY APPLYING ADHESIVE TO A SURFACE OF THE MEDIUM WEB, AND MEANS FOR PROGRESSIVELY PRESSING THE LINER WEB AGAINST THE ADHESIVE COATED SURFACE OF THE MEDIUM WEB TO FORM A TWO-PLY STRIP; THE IMPROVEMENT COMPRISING EDGE ALIGNING MEANS INCLUDING A FIRST SUPPORT EXTENDING LATERALLY OF SAID FIRST LINER WEB; A FIRST EDGE DETECTOR ENGAGED WITH A CONTROL EDGE OF THE FIRST LINER WEB AND MOUNTED ON SAID FIRST SUPPORT FOR ADJUSTMENT LATERALLY OF SAID FIRST LINER WEB; SAID FIRST EDGE DETECTOR BEING MOVABLE FROM A NEUTRAL POSITION RESPONSIVE TO LATERAL SHAIFTING OF SAID FIRST LINER WEB FROM A PREDETERMINED PATH; A FIRST HYDRAULIC FLUID ACUTATOR OPERABLE TO SHIFT SAID FIRST SUPPORT LATERALLY OF SAID FIRST LINER WEB; A SECOND SUPPORT EXTENDING LATERALLY OF SAID STRIP; A SECOND EDGE DETECTOR ENGAGED WITH A CONTROL EDGE OF SAID STRIP CORRESPONDING TO THE CONTROL EDGE OF SAID FIRST LINER WEB AND MOUNTED ON SAID SECOND SUPPORT FOR ADJUSTMENT LATERALLY OF SAID STRIP; SAID SECOND EDGE DETECTOR BEING MOVALBE FROM A NEUTRAL POSITION RESPONSIVE TO LATERAL SHIFTING OF SAID STRIP FROM A PREDETERMINED PATH; A SECOND HYDRAULIC FLUID ACTUATOR OPERABLE TO SHIFT SAID SECOND SUPPORT LATERALLY OF SAID STRIP; A SOURCE OF HYDRAULIC FLUID UNDER PRESSURE; A FIRST REGULATOR CONNECTED TO SAID FIRST EDGE DETECTOR AND BETWEEN SAID SOURCE OF HYDRAULIC FLUID AND ONE END OF SAID FIRST ACTUATOR AND THE OPPOSITE END OF SAID SECOND ACTUATOR, AND SELECTIVELY OPERABLE TO SUPPLY FLUID TO ONE OF SAID ACTUATORS, UPON MOVEMENT OF SAID FIRST EDGE DETECTOR FROM ITS NEUTRAL POSITION, TO SHFIT THE ASSOCIATED SUPPORT IN A DIRECTION OPPOSITE TO THE DIRCTION OF SHIFT OF SAID FIRST LINER WEB; A CONTINUOUS HYDRAULIC FLUID FILLED LINE, UNINTERRUPTED BY VALVES OR BRANCHES, CONNECTING THE OPPOSITE END OF SAID FIRST ACTUATOR TO THE ONE END OF SAID SECOND CTUATOR, SAID LINE BEING CONTINUOUSLY SOLIDLY FILLED WITH HYDRAULIC FLUID WHEREBY, UPON OPERATION OF EITHER ACTUATOR, THE OTHER ACTUATOR IS OPERATED CORRESPONDINGLY AS TO DIRECTION AND DEGREE; LATERAL GUIDING MEANS ENGAGING THE MEDIUM WEB IN ADVANCE OF THE ADHESIVE APPLYING MEANS; A THIRD HYDRAULIC FLUID ACTUATOR CONNECTED TO SAID GUIDING MEANS TO ACTUATE THE LATTER TO SHFIT THE MEDIUM WEB LATERALLY; AND A SECOND REGULATOR CONNECTED TO SAID SECOND EDGE DETECTOR AND BETWEEN SAID SOURCE AND SAID THIRD ACTUATOR AND OPERABLE, UPON MOVEMENT OF SAID SECOND DETECTOR FROM ITS NEUTRAL POSITION DUE TO SHIFTING OF SAID SECONDSUPPORT, TO SUPPLY FLUID TO SAID THIRD ACTUATOR IN A DIRECTION TO OPERATE THE LATTER TO ACTUATE SAID GUIDING MEANS TO SHIFT THE MEDIUM WEB LATERALLY IN DIRECTION AND DEGREE CORRESPONDING TO THE SHIFT OF THE FIRST LINER WEB.