Method and apparatus for making paper tubes

Claim 1

A PAPER TUBE FORMING MACHINE HAVING A FRAME COMPRISING IN COMBINATION: (A) GLUING AND SHEAR MEANS ON THE FRAME TO DRAW A STRIP OF PAPER INTO THE MACHINE AND TO APPLY ADHESIVE TO AT LEAST ONE SURFACE OF THE STRIP AND SHEAR THE STRIP INTO SELECTED SHEET LENGTHS, (B) A ROTATABLE PAPER TUBE WRAPPING MANDREL MOUNTED ON THE FRAME, (C) CONVEYOR MEANS CONNECTED TO THE FRAME BETWEEN THE GLUING MEANS AND THE MANDREL TO CONVEY SHEARED PAPER SHEETS ONTO SAID MANDREL, (D) DRIVE MEANS DRIVINGLY CONNECTED TO SAID MANDREL TO ROTATE THE MANDREL ABOUT ITS AXIS FOR A PREDETERMINED PERIOD OF TIME ONCE EACH TUBE FORMING CYCLE, SAID DRIVE MEANS BEING VARIABLE TO CAUSE THE MANDREL TO ROTATE SLOWLY INITIALLY AND THEREAFTER SMOOTHLY INCREASE THE SPEED OF ROTATION TO A SPEED IN EXCESS OF THAT WHICH COULD BE WITHSTOOD BY THE PAPER AT THE COMMENCEMENT OF A CYCLE, (E) SAID CONVEYOR MEANS BEING SYNCHRONIZED WITH SAID DRIVE MEANS TO CONVEY THE SHEET ONTO THE MANDREL WHEN THE MANDREL IS IN A STATIONARY CONDITION AT ANOTHER TIME EACH CYCLE; AND, (F) EJECTION MEANS TO EJECT A ROLLED PAPER TUBE FROM SAID MANDREL.