US1997965A - Garment or ironing press - Google Patents

Description

. 5 .INVENTOR.

' AIT-TORNEYJ" Patented Apr. 16, 1935 UNITED STATES PATENT. OFFICE Daly Manufacturing Company,

Cincinnati,

Ohio, a corporation of Ohio Application April 23, 1929, Serial No. 357,546

16 Claims.

My 'invention relates to a pressing machine preferably actuated by a pneumatic motor in which the cycles of'operation are pneumatically controlled.

Itis the object of my invention to provide a pressing machine in which a safety feature is incorporated in the pneumatic control, which prevents full fluid pressure power being applied to the pressing head until the head is substantially in pressing position, and the possibility of an operator having some part of the body crushed in the press is thereby prevented. In a pneumatic control for a pressing machine having two hand controls which the operator must grasp, to place full pressing power on the press, it is possible to prevent that particular operator from having the hands caught under the pressing head, but it frequently happens that an operator from some other press may carelessly place a hand or arm under the head and, if the operator controlling the press does not notice, the careless personis likely to be severely injured.

It is an object of my invention to precludethe possibility of such injury by incorporating in the control a safety feature which prevents full pressing power being applied excepting when the operator has both hands on the manual controls and when the head has closed to such an extent that no obstruction can remain under the head. Thus,

if there is an obstruction between the pressing members, the full pressing power or a locking arrangement which will allow the operator to leave the press with the pressing power on, cannot be applied. until the pressing members are substantially closed.

Another object is the provision of afluid pressuremotorinwhich theline pressure is compounded so that increased fluid pressure above that supplied from the fluid pressure source will result. The safety feature noted is further so arranged that, the increased pressure will not result until the pressing members are substantially closed, so that even though an operator might be pinched or burned the full crushing power of the press cannot be applied as long as some obstruction, suchas a part of the body, is between the pressing members.

A further object is the provision of a toggle leverage connection from the motor to the pressing head in which the compounding of the leverage does not result in greatly increased power trans mission until the pressing head is substantially in pressing position. Further, it will be observed,

that in the combination of toggle leverage and fluid pressure control, I have provided both a mechanical and a pneumatically controlled arrangement which precludes the application of the full pressing power until such close proximity of the pressing members or jaws has been reached that accidents to the operators of the pressing 5 machines in the establishment will be extremely unlikely.

The above and other objects to which reference will be made in the ensuing disclosure, I accomplish by the combination and arrangement of 10 parts of which I have shown a preferred embodiment.

Referring to the drawings:

Figure 1 is a diagrammatic side elevation of the press with parts in section.

Figure 2 is a diagram of the pneumatic control for the press including a motor means under pressure.

The pressing machine is composed of the usual standard or frame I on which the buck 2 is sup- 20 ported and with an upright 3 providing a pivotal support 4 for the pressing head rocker or press lever 5. Pivotally mounted on the upright 3 I have shown a lever 6 having a cam slot 1 therein.

A boss 8 extending from the end of the lever 25 provides an adjustable connection with the rear end 9 of the pressing head rocker through the medium of the adjustment screw and nut III.

A link arm ll carries on its end a roller M which engages the cam slot 7. The arm H is 30 pivoted in the machine frame as indicated at E3 and the usual bolt and spring conection I4 is employed to cushion the pressing stroke of the toggle leverage connections. A link I5 is pivoted to a boss extending back from the link H as in- 35 dicated at l6. Another link I! is pivoted to the link 15 as indicated at 18. The lever link l'l is pivoted at I9 in the machine frame and has an extending end 20 which connects with the end of the piston rod 2 l ,of the'compound fluid pres- 40 sure motor which will be hereinafter described.

I have indicated in dotted lines the position of the parts of the mechanism in fully open position, the parts being shown with the pressing head in pressing position. It will be noted that I have provided a toggle consisting of the link l5 and lever end I'I, one of .the toggle links having an extension 20 operatively connected with the fluid pressure motor and with the other toggle link connected with a pivoted lever having a connection by means of the cam slot in the arm 6. Full leverage is not applied through the toggle link connection until the pressing members are substantially in closed position.

By carefully planning the cam slot 1 it is 5 also possible to arrange the safety feature in the pneumatic control so that it will synchronize with the average transmission arrangement, and so that full compounded pressure cannot be applied until the position of the parts is such that the roller rides over the high spot la in the slot. Then only full power will be transmited through the leverage system. Thus a double safety feature of the control and the leverage arrangement will make a more efficient and safer press to operate. Y

The fluid pressure motor is composed of a shell 22 divided by a medially located head 23 which provides an upper cylinder 24 and a lower cylinder 25. Within the lower cylinder there is a piston 26 connected with the pistpn rod 2 i, which as noted, is pivotally connected with the link or lever arm 20. Within the upper cylinder 24 I have shown the piston head 2i which is connected with a tubular plunger 28, which extends up through a packing box 29 forming the upper head of the upper cylinder. The small cylinder 28, thus provided, has a piston 38 therein connected with a piston rod 35 which is mounted on the machine frame as indicated at 32.

The preliminary control which the operator should first operate to induce the initial movement of the press is indicated at 33. Compressed fluid, such as compressed air, passes thru a valve 34 from a supply line 35 when the handle 33 is depressed and thru pipe 36, 38 and tubular piston rod 3| into the telescoping cylinder 28. The fluid pressure then expands between the pistons 21 and 30 and forces the double cylinder 22, 25 downwardly a short distance thereby starting the press to close inasmuch as the head of cylinder 28 will bear against the top of cylinder 22 and move the latter downwardly.

Another preliminary control which thus requires both the hands of the operator is indicated at 39, and when this control is depressed, compressed air passes from the pipe 4|] through the intake 'valve-4| and pipe 4|a to the cylinder port G2, which admits the compressed air to the lower cylinder 25. If, during the initial operation of the two preliminary controls, there is some 0bstruction under the head, the roller l2 will not have passed over the high point la in the cam slot I, and the pressure in the small upper cylinder 28 will not be enough to close the press jaws with sufiicient force to injure an operator or bystander.

After releasing the preliminary control 33, the operator then lifts upwardly on a control manual 43 which admits air through an intake valve 44 from the supply pipe 35, 45 to the pipe 46, which extends to the port 41 in the upper cylinder 24. As the compressed air enters the cylinder 24 it presses against the piston 27! thereby compressing the air within the small upper cylinder. Due to the difference in area of the surface of the piston 21 and the piston 30, the air within the small upper cylinder above the piston 3|] is greatly compressed so that the back pressure passes through the conduits 38 and 49. A check valve 5|! in the pipe 36 prevents the now highly compressed air from leaking back through the valve 34.

Automatic pressure control diaphragms 5| and 52, which are so set that the supply pressure will not cause them to expand, are then expanded and the plungers 53 and 54 are extended thereby locking the valves 4| and 44 open with the fluid pressure applied to both cylinders and the pressing members of the press. To release the pressure from the cylinders, a valve 55 is propenance vided with a control 56, which will preferably be one of remote control so that the operator may release the pressure on the press while passing from another press. When the valve 55 is opened the air within the small upper cylinder 28 is evacuated through the pipe 5?. The automatic pressure diaphragms 5| and 52 are then collapsed by the springs 58 and 59 therein, and the air from the upper and lower cylinders is evacu ated through the valves 53 and ti and exhaust ports 62 and Substantially full pressing power may be applied to the press by movement on the controls 39 and 43 only. In such a method of operation however, the locking feature induced by the comi:

pounding of the pressure within the cylinder 28 will not be present.

The pressure actuated diaphragm or means 5| and 52 are held to expanded or operated'position by reason of the entrapped motive fluid pressure in the lines 33, 48 and 49 being highly compressed by upward movement of the piston 27. In this way, the intake valves 44 and 4| are locked or held open to maintain line pressure in the two cylinders 24 and 25 after the operator releases the two hand control means 39 and 43, and thus the press head is held resiliently closed on the buck. The operator may therefore close the press under light or initial pressure by opening the one hand valve 34 which sends air pressure to the small-bore cylinder 23 having sufficient power to swing the press lever 5 toward closed or lightly closed position but not sufficient power to produce final jaw pressure on the work or injure an operator.

After initial closing and light ironing or pressing contact is attained, the operator is compelled to then employ both hands and actuate the two hand manuals 39 and 43 if it is desired to carry out final high jaw compression. Such an arrangement leaves one hand of the operator free to complete the lay of the work and smooth out wrinkles noticed at the last moment.

The motor means is also a feature of the invention and comprises the triple fluid pressure motors, 25, 26, as well as 24, 21, and 28, 313. These motors are in axial alignment insofar as the illustrated example of the invention is concerned. It is also noted that the multiple or triple motor means are carried between two piston connecting rods 2| and 3| and hence the cylinders move or float between the pivot or support means 20 and 32.

While I have shown but one arrangement of my invention, it will be apparent that other modifications in structure and pneumatic control hav ing similar safety features will occur to others Without departing from the inventive principle involved.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:--

1. A garment or ironing press having coacting jaws, two high power fluid pressure motors operatively connected with one jaw to close the press and produce jaw compression, a pressure line having an intake valve and control manual in communication with each motor and thus requiring the use of both hands to start both motors, a third fluid pressure motor of low power operatively connected with the press jaw to initially operate the press and preliminarily move the jaw toward the work, the motors being connected with each other so that the movement of each motor is added to the movement of the other motors, and a pressure line having an intake valve and control manual in communication with the third fluid pressure motor.

2. A garment or ironing press having coacting jaws, two fluid pressure motors operatively connected with one jaw to close the press and produce jaw compression, a pressure line having an intake valve and control manual in communication with each-motor and thus requiring the use of both hands to start both motors, a third fluid pressure motor of low power operatively connected with the press jaw to initially operate the press and preliminarily move the jaw toward the work, a pressure line having an intake valve and control manual in communication with the third fluid pressure motor, and said third motor comprising a piston and cylinder means telescopically carried within one of the other motors.

, 3. A garment or ironing press having coacting jaws, two fluid pressure motors operatively connected with one jaw to closethe press and produce jaw compression, a pressure line having an intake valve and control'manual in communication with each motor and thus requiring the use of both hands to start both motors, a third fluid pressure motor of low power operatively connected with the press jaw to initially operate'the press and preliminarily move the jaw toward the work, a pressure line having an intake valve and control manual in communication with the third fluid pressure motor, said third motor comprising a piston and cylinder means telescopically carried within one of the other motors; and said three motors being disposed in axial alignment including spaced and oppositely disposed piston rods with the three cylinder means carried between the piston rodsand adapted to move upon said piston rods. 1

4. A garment or ironing press comprising a frame and coacting press jaws, motor means to operate the press including a piston rod attached to the frame, another piston rod operatively connected to one of the press jaws, a series of cylinders provided with pistons operatively disposed on the two piston rods so that the movement of each motor is added to the movement of the other motors, including, 'one cylinder of smaller bore than the others, a pressure feed line having an inlet valve and control manual in communication with each cylinder, pressure operated means to hold the intake valves for the motor means other than the smallerbore cylinder open to maintain line pressure on the motor means, and a pressure connection between the pressure operated means and the small bore cylinder.

5. A garment or ironing press comprising a frame and coacting press jaws, motor means to operate the press including a piston rod attached to the frame, another piston rod operatively connected-to one-of the press jaws, the two piston rods being spaced apart and axially disposed, a piston on the adjacent ends of eachpiston rod, cylinder means slidably carried on the piston rods, the pistons being operable therein, a motive fluid feed line including an inlet valve with acontrol manual therefor in communication with the. cylinder means, pressure actuated means to hold the intake valve open to maintain line pressure on the motor means after an operator has released the control manual, means to entrap motive fluid in the cylinder means and to compress same upon the operation of the motor means, and a connection between the pressure actuated means and the means to entrap and compress the motive fluid.

6. A garment or ironing'press comprising a frame and coacting press jaws, a cylinder having a dividing wall forming two cylinders in axial alignment, a pair of inlet ports in the dividing wall and leading to therespective cylinders, a piston and connecting rodin each cylinder, a pressure feed line connected with. each port, an inlet valve and control manual in each feed line, one piston and connecting rod being operatively connected with a press jaw and the other with the frame, one of the piston rods being tubular to form a cylinder and means therein to compress motive fluid in this cylinder when pressure is admitted to the other two cylinders, and means operated by the compressed motive fluid to hold the intake valves open after an operator releases the control manuals.

7. A garment or ironing press comprising a frame and coacting press jaws, a high power pressure motor means operatively connected with one of the jaws to close the press and produce final high jaw compression, a small bore cylinder and piston means operated by the motor means to compress a motive fluid, and means operated by the compressed motive fluid causing the high power motor means to be held in its operated position to hold the press closed.

8. A garment or ironing press comprising a frame and coacting press jaws, a high power pressure motor means operatively connected with one of the jaws to close the press and produce final high jaw compression, a small bore cylinder and piston means telescopically mounted within the high pressure motor means and including a tubu- .lar piston rod to admit motive fluid to the small bore cylinder, a check valve to prevent the escape of motive fluid from the small bore cylinder, the high power motor means actuating the small bore cylinder and piston to compress the motive fluid therein upon pressure fluid being admitted to the high power motor means, and means operated by the compressed motive fluid causing the high power motor to be held in its operated position to hold the press closed.

9. A garment or ironing press comprising a frame and coacting press jaws, a low power fluid pressure cylinder motor operatively connected with one of the jaws to move same toward closed position, and a double cylinder fluid pressure motor operatively connected with the same jaw to force it to final compression, pressure feed lines to all cylinders, the low power and double cylinder motors being operatively connected so that the low power motor is operated asa compressor and causes the same to compress the motive fluid therein, a two hand safety control valve means in the pressure feed lines connected to the double cylinder motor, and means operated by the compressed motive fluid in the low power motor'to hold open the two hand valve means.

10. A garment or ironing press comprising oojaws, two fluid pressure motors operatively con nected with one jaw to produce jaw compression, a pressure line having an intake valve with control manual in communication with each motor thereby requiring the use of both hands to start both motors, a third fluid pressure motor of low power operatively connected with the press jaw and with one of the aforesaid motors to initially operate the press and preliminarily move the jaw toward the work while the two motors aforesaid remain deenergized, the motors being connected in series with each other so that the movement of each motor is added to the movement of the other motors, and a pressure-line having an intake valve with a single control manual in communication with the third fluid pressure motor.

12. A garment or'ironing press comprising a frame and coacting press jaws, a high powered motor operatively connected with one of the jaws to close the press and produce final high jaw compression, a two hand control for the high powered motor, a small bore cylinder and piston means operated by the high powered motor means to compress a motive fluid, and pressure responsive means operated by the compressed motive fluid and operatively connected with the two hand control to hold the two hand control in its operated position to hold the press closed after an operator lets go of the two hand control.

13. A garment or ironing press comprising a frame and coasting press jaws, a high power motor operatively connected with one of the jaws to close the press and produce final high jaw compression,

a low power motor having a small bore cylinderand piston means telescopically mounted within the high power motor and including a tubular piston rod to admit motive fluid to the small bore cylinder, a pressure supply line having a control valve to energize the low power motor to close the press, means to prevent the escape of motive fluid from the small bore cylinder after said fluid has actuated the lower power motor, the pressure applied to the high power motor causing the low power motor to act as a compressor to compress the motive fluid therein, and means operated by the compressed motive fluid to cause the high power motor to be held in its operated position to maintain the press closed.

14. A garment or ironing press comprising a menace frame, coacting press jaws, a triple piston and cylinder motor means operatively connected to one of the press jaws, a piston rod connected to the frame, the motor means comprising a series arrangement of floating cylinders in axial alignment and carried on the piston rod as one end of the series arrangement, one cylinder and piston. being smaller in bore to lightly close the press, the other cylinders being larger in bore to produce jaw compression, and two hand control means including a valve for each of the said other cylinders.

15. A garment or ironing press comprising a frame and coating press jaws,'a low power fluid pressure motor operatively connected with one of the jaws to move the same toward closed position, and a fluid pressure motor means operatively connected with the same jaw to force it to final position, a pressure feed line connected to the motor and the motor means, means operatively connecting the low power motor with the motor means so that the direction of movement of the movable part of the low power motor is reversed upon fluid being admitted to the motor means thereby compressing the fluid in the low power motor, valve means in the pressure feed lines to the motor means, and means operated by the compressed motive fluid generated in the low power motor to hold open the valve means.

16. A garment or ironing press comprising a frame and coacting press jaws, a cylinder means housing a plurality of motor units each of which includes a piston, a piston rod projecting from one end of the cylinder means and operatively connected with one of the jaws, a piston rod of another motor unit projecting from the other end of the cylinder means and mounted on the frame, the last piston rod being provided with a pressure inlet passage leading to the pressure side of the piston carried thereby, a pressure feed line connected with the inlet passage and having a control valve, and a pressure feed line connected with another unit of the cylinder means and including an inlet valve and control manual therefor.

JOSEPH P. DALY.

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