Patent GB-353274-A (GB)
Title: Improvements in or relating to pressing machines
IPC: D06F71/40
Filed: 1930-08-08
Abstract: 353,274. Ironing presses. PROSPERITY CO., Inc., Beattie Street, Syracuse, New York, U.S.A.-(Assignees of Braun, P. N.; 139, Alanson Place, Syracuse, New York, U.S.A.) Aug. 8, 1930, No. 23808. Convention date, Aug. 9, 1929. [Class 138 (ii).] In an ironing press a work grip is provided which is first swung over the margin of the buck and is then lowered into engagement with the work. After the operator has stretched and set the work the grip is raised and swung away from the buck and the press is operated. The grip may be actuated by the same fluid pressure that actuates the press and interlocking means may be provided to prevent actuation of the press when the grip is in operative position and to present movement of the grip when the press is closed. The grip comprises a plate 8, Fig. 2, carried by a rod 9 which is slidably mounted in a block 10 pivcted to a bracket 13 depending from the buck 1. The lower end of the rod 9 is ball-and-socket jointed to the rod 37 of a piston working in a cylinier 35 which is ball-and-socket jointed at 39 to the bracket 13. Downward movement of the piston first swings the rod 9 from the dotted line position shown to a vertical position defined by the engagement of a member 17 on the rod 9 with a fixed stop 16. Further movement of the piston lowers the rod and plate 8 against a spring 14 into clamping engagement with the work on the buck. Fluid pressure is admitted to the cylinder 35 from a supply pipe 47, Fig. 5, through a branch 81, normally open valve 102, pipe 106, inlet valve 78 opened by depression of a button 82, and pipe 92. The inlet valve 78 is maintained open and an exhaust valve 79 on the same stem maintained closed by fluid pressure acting through a duct 87, diaphragm 85 and valve-operating lever 84. Pressure is released by opening an exhaust valve 88a by swinging a lever 91 counterclockwise. The press is closed by fluid pressure acting on the upper face of a piston 19, being admitted thereto from the pipe 47 through a branch 96, normally open valve 95, pipe 99, inlet valve 44 opened by depression of a button 50, and pipe 49. A normally open exhaust valve 70 must be maintained closed by the continued depression of another button 66 and the button 50 must also be maintained depressed to keep the valve 44 open, and an exhaust valve 45 on the same stem closed until after the press has reached safe closed position, at which stage a port 60 in the cylinder 18 is uncovered and fluid pressure is admitted to diaphragms 55, 73 through pipes 57, 75 to maintain both the valve 44 open and valve 70 closed through the stems 61, 76, levers 52, 68 and stems 53, 69 respectively. The press is opened by opening an exhaust valve 62. The interlocking means comprise diaphragm chambers 93, 100, the upper faces of the diaphragms 94, 101 therein communicating through pipes 97, 105, with the pipes 92, 49 respectively. If the press is closed depression of the button 82 to actuate the work grip is without effect since the fluid pressure in pipes 49, 105 acts on the upper face of the diaphragm 101 to close the valve 102 and shut off the pressure supply to the pipe 106 and cylinder 35. Similarly if the work grip is in position fluid pressure from pipe 92 acts on the upper face of diaphragm 94 to close the valve 95 and to shut off the supply to the pipe 99 and to render depression of the buttons 50, 66 ineffective.