Silk screen printing machine

Claim 1

IN A SILK SCREEN PRINTING MACHINE THE IMPROVEMENT COMPRISING IN COMBINATION (A) A MACHINE FRAME, (B) AN ASSEMBLY OF FOUR PARALLEL SHAFTS FORMING THE FULCRUMS OF A PARALLELOGRAMMATIC LINKAGE SYSTEM INCLUDING AN UPPER REAR OR ACTUATING SHAFT ROTATABLY MOUNTED IN THE FRAME, A LOWER REAR OR GUIDE SHAFT FIXEDLY MOUNTED IN THE FRAME WITH ITS AXIS LOCATED IN A VERTICAL PLANE CONTAINING THE AXIS OF SAID UPPER REAR SHAFT, TWO UPPER ARMS KEYED TO SAID ACTUATING SHAFT, TWO LOWER ARMS PIVOTED ON SAID GUIDE SHAFT, AN UPPER FRONTAL SHAFT ROTATABLY MOUNTED IN THE OUTER ENDS OF SAID UPPER ARMS, A LOWER FRONTAL SHAFT ROTATABLY MOUNTED IN THE OUTER ENDS OF SAID LOWER ARMS, AND AT LEAST ONE VERTICAL TIE ROD WITH ITS ENDS PIVOTABLY AND SLIDABLY RESTING ON SAID TWO FRONT SHAFTS, (C) A FIRST HORIZONTAL BAR ATTACHED TO THE LOWER ENDS OF SAID TIE RODS, (D) A SILK SCREEN FRAME ATTACHED TO SAID BAR, (E) A SUPPORTING MEMBER COMPOSED OF A HORIZONTAL AND A VERTICAL ARM, THE OUTER END OF THE HORIZONTAL ARM SLIDINGLY EMBRACING THE SAID UPPER REAR SHAFT, THE INNER END OF THE HORIZONTAL ARM SLIDABLY EMBRACING SAID UPPER FRONTAL SHAFT, AND A FORKED EXTENSION VERTICALLY DEPENDING FROM THE OUTER END OF SAID HORIZONTAL ARM, (F) A SECOND HORIZONTAL BAR FIXEDLY MOUNTED ON SAID VERTICAL ARM OF THE SUPPORTING MEMBER, (G) A SQUEEGEE CARRIER MOUNTED ON SAID SECOND HORIZONTAL BAR, (H) DRIVE CARRIAGE SLIDINGLY MOUNTED ON SAID LOWER REAR SHAFT, (I) ACTUATING MEANS IMPARTING A RECIPROCATING MOVEMENT TO SAID DRIVER CARRIAGE, (J) A TWO ARMED STIRRUP MEMBER WITH ITS ARMS ROTATABLY MOUNTED ON SAID DRIVER CARRIAGE AND A SPUR THEREUPON, SAID SPUR WHEN IN UPTURNED VERTICAL POSITION ADAPTED TO ENGAGE SAID FORKED EXTENSION, AND THUS TO OPERATIVELY CONNECT SAID DRIVER CARRIAGE WITH SAID SECOND HORIZONTAL BAR SUPPORTING THE SQUEEGEE CARRIER, (K) A CLEVIS MEMBER ATTACHED TO SAID FIRST HORIZONTAL BAR AND ADAPTED TO BE ENGAGED BY SAID SPUR WHEN IN HORIZONTAL POSITION AND THUS OPERATIVELY CONNECTING SAID DRIVER CARRIAGE WITH SAID FIRST HORIZONTAL BAR SUPPORTING THE SCREEN FRAME, (I) AN ACTUATING MEANS ADAPTED TO PIVOT SAID UPPER REAR SHAFT AND ACTUATE SAID PARALLELOGRAMMATIC LINKAGE SYSTEM.