Uniform spraying apparatus

Claim 1

EQUIPMENT FOR PNEUMATIC SPRAYING OF A LIQUID ON WORKPIECES COMPRISING AN ENCLOSING CABINET WITH A SPRAYING CHAMBER THEREIN, A SPRAYHEAD IN SAID CABINET EXTENDING INTO SAID SPRAYING CHAMBER, SAID SPRAYHEAD HAVING MEANS SUPPLYING THERETO AT A CONSTANT RATE A LIQUID TO BE SPRAYED, MEANS SUPPLYING A PROPELLENT GAS TO SAID SPRAYHEAD AT A CONSTANT RATE TO ATOMIZE AND PROPEL LIQUID THEREFROM INTO SAID SPRAYING CHAMBER IN THE FORM OF A SPRAY HAVING A LOCALIZED NONUNIFORM SPRAY PATTERN, MEANS RECIPROCATING SAID SPRAYHEAD BACK AND FORTH IN A FIRST DIRECTION NORMAL TO THE SPRAY FROM SAID SPRAYHEAD, TRANSVERSE OF SAID SPRAYING CHAMBER, A HOLDER SUPPORTING WORKPIECES IN SAID SPRAYING CHAMBER MAINTAINING THEM AT A FIXED DISTANCE FROM SAID SPRAYHEAD IN THE DIRECT PATH OF LIQUID SPRAYED FROM SAID SPRAYHEAD, SAID HOLDER INCLUDING MEANS FOR MOVING SAID WORKPIECES THROUGH SAID SPRAYING CHAMBER AT A UNIFORM RATE IN A SECOND TRANSPORTING DIRECTION NORMAL TO THE SPRAY FROM SAID SPRAYHEAD, TRANSVERSE OF SAID SPRAYING CHAMBER AND SUBSTANTIALLY AT RIGHT ANGLES TO SAID FIRST DIRECTION OF RECIPROCATION CONCURRENTLY WITH SAID RECIPROCATION AND MEANS IN SAID SPRAYING CHAMBER FOR COLLECTING GAS AND SPRAYED LIQUID FROM SAID SPRAYHEAD PASSING BEYOND SAID WORKPIECES, THE SAID MEANS RECIPROCATING SAID SPRAYHEAD AND SAID MEANS FOR MOVING SAID WORKPIECES IN TRANSPORTING DIRECTION CONCURRENTLY BEING TIMED SO THAT THE LOCALIZED NON-UNIFORM SPRAY PATTERN REACHING SAID WORKPIECES IS CANCELLED OUT AND UNIFORM DISTRIBUTION OF THE SPRAYED LIQUID IS OBTAINED ON THE WORKPIECES.