High speed rotary machines

Claim 1

IN A MACHINE FOR MAKING ENVELOPES, THE COMBINATION OF A MAIN FRAME, A CONVEYOR, SAID CONVEYOR INCLUDING TWO INNER BELTS AND TWO OUTER BELTS TO COOPERATE WITH THE INNER BELTS TO CONDUCT A BAND OF OVERLAPPED ENVELOPE BLANKS FROM A LOW LEVEL TO A HIGHER LEVEL, ROLLERS TO GUIDE SAID BELTS IN A CURVED PATH, EACH INNER BELT HAVING AT ITS UPPER END A HORIZONTAL EXTENSION, ROLLERS TO SUPPORT A MAJOR PORTION OF SAID EXTENSION, DRIVING MEANS FOR THE OUTER BELT, DRIVING MEANS FOR THE INNER BELT, A SWINGABLE FRAME INCLUDING TWO VERTICAL SIDE BARS, AND A TIE BAR BETWEEN THEM, PIVOTS, ONE AT THE LOWER END OF EACH SIDE BAR, WHEREBY THE SWINGABLE FRAME IS SUPPORTED ON THE MAIN FRAME, SIDE PLATES TO SUPPORT THE GUIDE ROLLERS, SAID SIDE PLATES BEING SUPPORTED ON SAID TIE BARS, HORIZONTAL BARS, ONE AT EACH SIDE OF THE MACHINE, A BAR SUPPORTED BETWEEN AND AT THE UPPER ENDS OF THE VERTICAL BARS, HOLD DOWN SPRING LOADED ROLLERS TO COOPERATE WITH THE HORIZONTAL EXTENSION OF THE INNER BELT, MEANS TO DRIVE THE INNER BELT, AND MEANS TO ADJUST THE SIDE ARMS LENGTHWISE TO VARY THE POSITION OF THE DELIVERY END OF THE INNER BELT.