Apparatus for securing covers on viscous vibration damper units or the like

Claim 1

IN COMBINATION IN A MACHINE FOR SPINNING INNER AND OUTER COVER-RETAINING FLANGES OF AN ANNULAR METAL CASING ONTO THE MARGINS OF AN ANNULAR CLOSURE PLATE ON THE CASING, MEANS FOR SUPPORTING THE CASING ROTATABLY ABOUT THE AXIS OF THE ANNULAR CLOSURE PLATE, AND SPINNING HEAD ASSEMBLY MOUNTED FOR MOVEMENT INTO AND OUT OF SPINNING RELATION TO THE CASING ON SAID SUPPORTING MEANS, AND AT LEAST TWO SETS OF SPINNING ROLLERS, EACH SET OF ROLLERS COMPRISING AN INNER AND AN OUTER FLANGE SPINNING ROLLER MOUNTED ON A MEMBER WHICH IS IN TURN PIVOTALLY CARRIED BY A COMMON EQUALIZING YOKE WHICH IS PIVOTALLY SECURED TO AND SUPPORTS EACH OF SAID MEMBERS AND WHICH IS IN TURN ROCKABLY SECURED TO SAID HEAD, MEANS LIMITING SAID MEMBERS TO MOVEMENT IN RESPECTIVE PLANES EXTENDING SUBSTANTIALLY RADIALLY OF SAID HEAD WHEREBY SAID MEMBERS ROTATE WITH SAID HEAD, ALL OF SAID ROLLERS BEING OPERABLE SIMULTANEOUSLY TO SPIN THE INNER AND OUTER RETAINING FLANGE OF THE CASING ONTO THE MARGIN OF THE COVER PLATE WHILE THE CASING IS ROTATED BY SAID SUPPORTING MEANS.