Rotary cut-off device with interchangeable cutter and anvil elements

Claim 1

IN A CUT-OFF DEVICE FOR SEVERING ON ELONGATED STRIP OF MATERIAL ADVANCED ALONG A PREDETERMINED PATH THROUGH OF CUT-OFF STATION, THE COMBINATION OF, FIRST AND SECOND DRUMS ROTATABLY MOUNTED ON OPPOSITE SIDES OF SAID PATH AT SAID CUT-OFF STATION, A FIRST ELONGATED BAR OF REGULAR POLYGONAL CROSS-SECTION HAVING FLAT SIDES AND CORNERS FORMED AS KNIFE EDGES, FIRST MEANS ON SAID FIRST DRUM FOR REMOVABLY SUPPORTING SAID BAR THEREON WITH AN ONE OF SAID KNIFE EDGES FACING RADIALLY OUTWARDLY FOR ENGAGEMENT WITH ONE SIDE OF SAID STRIP, A SECOND ELONGATED BAR ALSO HAVING FLAT SIDES AND CORNERS FORMED AS KNIFE EDGES, AND SECOND MEANS ON SAID SECOND DRUM FOR REMOVABLY SUPPORTING SAID SECOND BAR THEREON WITH ANY ONE OF SAID FLAT SIDES FACING RADIALLY OUTWARDLY FOR ENGAGEMENT WITH THE OTHER SIDE OF SAID BARS BEING OF SERVE AS AN ANVIL FOR SAID FIRST BAR, SAID BARS BEING OF THE SAME SIZE AND SHAPE TO BE RECEIVED INTERCHANGEABLY IN SAID FIRST AND SECOND SUPPORTING MEANS.