Sheet folding machine

Claim 1

A FOLDING MACHINE FOR QUARTER FOLDING A SHEET WITH TWO TRANSVERSE FOLDS AND WITH THE END EDGES OF SAID SHEET UPPERMOST SUBSEQUENT TO FORMING SAID FOLDS COMPRISING MEANS FOR FLAT FEEDING DISCONTINUOUS FLAT SHEETS IN AT LEAST ONE DIRECTION, MEANS FOR ENGAGING, RAISING, AND SECURING AGAINST FURTHER MOVEMENT THE LEADING END EDGE OF SAID SHEET AS SAID SHEET CONTINUES TO MOVE, MEANS FOR RELEASING AND DROPPING SAID LEADING END EDGE FROM SAID LAST MENTIONED MEANS AS THE TRAILING END EDGE OF SAID SHEET REACHES A SELECTED POSITION TO FORM A FIRST TRANSVERSE FOLD IN SAID SHEET WITH SAID FIRST FOLD IN A DIRECTION FORWARD OF SAID END EDGE WITH RESPECT TO THE DIRECTION OF SAID MOVEMENT, MEANS FOR MOVING SAID SHEET IN A PLANE ANGULAR WITH RESPECT TO THE HORIZONTAL AFTER SAID FIRST FOLD IS FORMED, MEANS FOR EFFECTING A SECOND TRANSVERSE FOLD IN SAID SHEET WHILE SAID SHEET IS MOVING IN SAID ANGULAR PLANE AND MEANS FOR THEREAFTER CHANGING THE DIRECTION OF MOVEMENT OF SAID TWICE FOLDED SHEET FROM SAID ANGULAR PLANE WHEREBY SAID SECOND FOLD IS POSITIONED IN ADVANCE OF SAID FIRST FOLD WITH RESPECT TO THE DIRECTION OF MOVEMENT, AND MEANS FOR DELIVERING IN A SECOND ANGULAR PLANE SAID TWICE FOLDED SHEET AS IT MOVES WITH SAID FIRST TRANSVERSE FOLD LYING REARWARDLY AND SAID SECOND TRANSVERSE FOLD LYING FORWARDLY WITH RESPECT TO THE DIRECTION OF SAID MOVEMENT AND SAID END EDGES LYING OVER SAID FIRST FOLD.