US1877752A - High pressure and low pressure pressing machine - Google Patents

Description

Sept. 13, 1932. v E. DAVIS 1,877,752

HIGH PRESSURE AND LOW PRESSURE PRESSII IG MACHINE Filed June 12, 1929 3 Sheets-Sheet J.

Sept. 13, 1932. E. DAVIS HIGH PRESSURE AND LOW PRESSURE PRESSING MACHINE 3 Sheets-Sheet 2 Filed June 12, 1929 Sept. 13, 1932. V DAV|$ 1,877,752

HIGH PRESSURE AND LOW PRESSURE PRESSING MACHINE Filed June 12, 1929 5 Sheets-Sheet 3 \a & P 9

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Patented Sept. 13, 1932 UNITED STATES.

PATEN'F OFFICE ERNEST DAVIS, Olli SYRACUSE, NEW YORK, ASSIGNOR TO THE PROSPERITY COMPANY, INC., OF'SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK Application filed June 12, 1929. Serial No. 370,208.

This invention relates to machines having an opening and closing movement as garment and laundry presses and has for its object, a particularly simple and efficient control for the motor of the press, whereby the press head or ]LW can be first closed under light pressure and then at the option of the operator under various degrees of heavy pressure, or graduated jaw pressure.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters represent corresponding part in all the views.

Figure 1 is a side elevation of a pressing machine embodying my invention and in closed position.

Figure 2 is a diagrammatic view partly in section, illustrating themotor and the controls therefor, in open press position.

Figure 3 is an enlarged fragmentary detail view partly in section showing a manual operating member or pedal in side elevat on.

Figure 4 is a front elevation of the pedal shown in Figure 3.

Figure 5 is an enlarged fragmentary view partly in section of the cams operated by the operating member or pedal, the control and release members and motion transmitting parts between the cams and said members.

Figure 6 is an elevation of parts seen in Figure 5.

The invention comprises generally motor means operable to move the movable pressing element of a pressing machine into light or low pressure coaction withthe other element of the machine, and into heavy or high pres sure coaction therewith, and an operating member movable in one drection from neutral to effect the low pressure coaction and in the opposite direction from neutral to effect the high pressure coaction and beyond its posit on assumed when effecting high pressure coaction, to open the press.

The invention is shown as embodied in a modern or standard aw type of garment and laundry press comprising a buck 1 and a head 2 movable toward and from the buck, the

buck being mounted on a bracket or bolster 3 which is supported on the frame 4 of the machine. The head 2 is carried at the front end of a frame or yoke lever 5 pivoted at 6 between its ends to a standard 7 rising from the frame. 1

The head is actuated by motor means connected through suitable motion transmitting mechanism to the rear arm of the lever 5. The motor means in this embodiment of my invention, is shown as of the fiuid pressure type. Compressed air is preferably the motwo power.

The motor meanshere illustrated includes two units, each unit comprising a cylinder and piston. 8 designates the cylinder for effecting light pressure between the pressing elements and 9 the piston therein. The cylinder 8 is pivoted at 10 to the back leg 11 of the frame or a bracket 12 thereon in order that the cylinder may oscillate during the movement of the piston. The rod 13 of the piston is connected at 14 to the rear arm of the lever 5.

15 designates the cylinder and 16 the piston for applying high or heavy pressure to the pressing elements. The cylinder 15 is pivoted at 17 to the under side of the frame to have an oscillating movement and the rod 18 of the piston is connected through levers and links to the rear arm of the yoke lever 5. The piston rod 18 is here illustrated as pivoted at 19 to the forwardly extending arm of an angle lever 20 pivoted at 21 at its angle to the base of the frame, the upwardly extending arm of the angle lever being pivoted at 22 to the lower end of a link 23 which is pivoted at its upper end at 14 to the rear arm of the yoke lever. The pistons are single acting and when the pressure in the cylinders is released, the press is opened by counter-springs 24, 25.

As the motor means is operated by air pressure, the operating means acts to control the flow of motive fluid to and from the cylinders through control valve means.

The operating member is preferably a pedal 26 mounted to rock about an axis laterally in opposite directions from neutral position. The pedal 26 is mounted on a shaft or spindle 27 journalled in bearings 28 in a. bracket 29 at the base of the frame.

30 designates the control member or valve means for controlling light pressure, and 31 the control member or valve means for controlling heavy pressure. 30 comprises a casing 32, a normally closed spring pressed intake valve 33 in the casing and a normally open exhaust valve 34 connected to the intake valve by a stem 35 to act as a unit. The intake end of the casing 32 is connected to the feed line or pipe 36.

The casing 32 is connected at a point between the valves 33 and 34 to a pipe 37 having a branch 38 leading to the light pressure cylinder 8. This branch 38 may be considered the light pressure line as it is through it and the cylinder that the piston 9 is actuated and the head 2 is actuated into light pressure position.

The heavy pressure control member or valve means 31 comprises a casing 39 having a normally closed spring pressed intake valve head 40 and a normally open exhaust valve head 41 connected together by a stem 42 to act as a unit. The intake end of the casing 39 is connected by a pipe 43 to the pipe 37 and the casing 39 is connected from a point between the valve heads by a pipe 44 to the intake end of the heavy pressure cylinder 15. The pipe'44 may, for convenience, be considered a heavy pressure pipe, as it is through it and the cylinder 15 and piston 16 that the press head 2 is closed under heavy pressure. The pipe 44 has a check valve 45 therein which acts to lock the air in the cylinder 15 and hence, lock the press closed and which may be used as a graduated pressure control valve to add increments of jaw compression to the work on the buck 1.

The valves of the controls 30 and 31 are operated from the pedal 26 through suitable motion transmitting mechanism. As here illustrated, this mechanism comprises c ams 46 and'47 mounted on the shaft 27 of the pedal 26, movable plunger parts as slides 48 and 49 having followers as rollers 50 and 51 at like ends coacting with the cams and having means at their other ends thrusting against levers 52 and 53 which coact with the stems 54 and 55 of the exhaust valve heads. The slides 48, 49 move in suitable tubular guides 56 and 57 in a bracket 58, carried by the machine frame, and springs 60, 61 are located in the guides 56 and 57 and act on the slides to cause them to follow the cams 46 and 47.

These springs 60 and 61 are heavy or strong enough to return the pedal 26 to neutral when released. The motion of the slides 48 and 49 is transferred yieldingly to prevent possible The valve meansv fer springs 66 and 67 are interposed between the slides 56 and 62 and 57 and 63.

The lever 52 is part of the means for locking the valve heads 33 and 34 in their operated or closed press position. This means is pressure operated and comprises a diaphragm chamber 68 having a diaphragm 69 therein which acts through a sliding rod 70 on the lever 52. The pressure side of the chamber 68 is connected to an air supply pipe 71 through a pipe or flexible hose 72 and control valve therem. The pipe 71 is also flexible. Also, all of the other pipes connected to movable parts as 38 and 44 are flexible or provided with flexible or hose portions.

A control valve 73 is mounted on the head 2 or the yoke lever 5 and comprises a casing 74 having a normally closed spring pressed intake valve head 75 and a normally open exhaust valve head 76 connected together by a stem 77 to act as a unit. The intake end of the casing is connected to the pipe 71 and the pipe 72 opens into the casing between the valve heads. The valve heads 75 and 76 are operated by a hand lever 78 pivoted at 79 and having an arm 80 thrusting against the stem 81 of the exhaust valve head 76. A spring 82 returns the hand lever 78 to its starting position when released and permits the spring in the valve casing 74 to close the intake valve 75 and open the exhaustvalve 76. When the exhaust valve 76 is thus opened, pressure is released from the diaphragm chamber 68 and the valves in the control means 30 return to normal position so that the supply of working fluid from the supply line 36 is cut ofl and the pipes 37 and 38 are open to exhaust.

By tilting the pedal 26 and rotating shaft 27 to the left in Figure 2, the control valve 30 is operated to let air enter the light pressure cylinder 8 to close the press under light pressure. By then depressing the hand lever 78, the control valve 30 will be momentarily locked in operated position while the pedal is being reversed or turned from its left hand position indicated at A in Figure 4 to its right hand position B in Figure 4 to operate the control valve means 31 to obtain heavy pressure. Obviously, the press will be held under heavy pressure by the check valve 45.

The press is provided with means for exhausting theair from the cylinder 15. This means comprises a normally closed spring pressed exhaust valve 83 in a casing 84 which is connected by pipes 85 and 86 to the pipe 44 leading to the cylinder 15. The valve 83 is opened against the action of its returning spring by the cam 47 which has a cam point .87 arranged to coact with a follower 88 on a lever 89 thrusting against a stem 90 of the valve 83. The cam point 87 is located to engage the follower when the pedal 26 is turned to its extreme right hand position. Opening of this exhaust valve 83 will permit working fluid to escape from the cylinder 15 through the pipes 86 and 85. If the handle 78 has not been held in down position, the valve 34 .will be open and there will be no working fluid in the cylinder 8. Thus the press may open under influence of the countersprings 24 and 25.

' The cam 46 is also formed with a cam point 91 to coact with a follower 92 on a lever 93 which acts on a stem 94 of a normally closed spring pressed exhaust valve 95 in a casing 96 which casing is connected by a pipe 97 to the pipe 86. Upon initial turning of the pedal 26 to the left, the point 91 will open the valve 95 to exhaust the cylinder 15 and the press will open to light pressure position.'

Also, upon initial turning of the pedal to the left when the press is closed, the exhaust valves will be opened and prevent the piston in the cylinder 15 from being air bound.

In operation, the operator after laying the work on a buck 1, turns the pedal 26 to the left, causing the cam point 98, not before referred to, on the cam 46 to operate the control valve 30 as described permitting the air to enter the low power cylinder 8. This movement of the cam 46 also causes the cam point 91 to open the valve 95 so that air in the cylinder 15 will remain at atmospheric ment of the press. He then, if he desires heavy pressure, momentarily locks the valve 33 in open position by pulling down on the hand lever 78 and then turns the pedal 26 to the right causing a cam point, 99 not before mentioned, on cam 47 to open the valve and permit air to enter the high power cylinder 15, the check valve holding the pressure in this cylinder. The operator can build up or graduate the pressure in the high power motor 15 by successively actuating the con-' trol pedal to the left a number of times, as by short stroke foot movements, and each small increment or charge of air which passes the check valve 45 will add just that much more jaw pressure against the work on the buck 1. To open the press, the operator turns the pedal 26 further to the right so that the cam point 87 on the cam 47 opens the exhaust valve 83. Upon release of the pedal 26, one or the other of the springs or 61 acting through the cams 46 and 47 respectively, returns the pedal 26 to horizontal or neutral starting position. In turning the pedal 26 to the extreme right to open the exhaust valve 83 the cam point 99 does not pats by the roller 51 nor pass the center of the roller so that the force of the spring 61 is effective to return the pedal to the left and back to neutral position.

The invention provides a fast working multistep ironing press which is safe in operation by rapidly closing onto the work under the influence of a low power motor and thereafter producing final high jaw compression by reason of a high powered motor controls the principal movements and operations'of the press by a single toe pedal, thus leaving his hands free for handling the work and goods being ironed.

What I claim is:

1. In a garment or laundry pressing ma- 76 chine in combination cooperative pressing elements, one of which is movable to open and close the press; operating mechanism for the movable pressing element including motor means for closing the press under a light 8 pressure and other motor means for applying heavy pressure to the pressing elements; Valve means for controlling the flow of motive fluid to both motor means; a conduit connecting the valve means with the light pressure motor means, and another conduit connecting the valve means with the heavy pressure motor meansfan operator-operated control member, normally in neutral position,

and movable in one direction from neutral position to operate the valve means to supply working fluid to the low pressure motor .means, and movable in the opposite direction pressure during the preliminary closing movefrom neutral position to operate the valve means to supply working fluid to the heavy pressure motor means; and means to prevent the effective operation of the control member in the second of said directions before it has been moved in the first direction.

2. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including light pressure and heavy ressure motor means and operating connections between the same and the movable element to close said element under light and heavy pressure, means for controlling the flow of power to the motor means including an operating member normally arranged in neutral position and movable in opposite directions from neutral to eflect the actuation of the motor means to move the movable element into light pressure and heavy pressure positions respectively, means for holding the press in the motor means and the movable element 7 and means for controlling the actuation of the motor means to produce light pressure and heavy pressure including means to control the supply of motive fluid to the motor means, an operating member normally arranged in neutral position and movable in one direction from neutral to actuate the fluid supply control means to effect light pressure and in the other direction from neutral to actuate the fiuid supply control means to efiect heavy pressure, and means to prevent effective operation of the operating member to cause heavy pressure before it has been operated to cause light pressure.

4. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including motor means having a light pressure unit and a heavy pressure unit and operating connections between the units and the movable element to close said element under light pressure and heavy pressure respectively, means for controlling the flow of power to the light pressure unit, means for controlling the flow of. power to the heavy pressure unit, said heavy pressure control means being connect ed in series with the light pressure control means, whereby the efiective operation of the heavy pressure control means is governed by the operation of the light pressure control means, means for operating said control means successively including a single operating member movable in opposite directions from neutral, and operating connections between said operating member and the control means, whereby movement in one direction from neutral operates one control means and movement .in the other direction from neutral operates the other control means, and means for locking the light pressure control means in its operated position.

5. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including motor means having a light pressure unit and a heavy pressure unit and operating connections between the units and the movable element to close said element under light pressure and heavy pressure respectively, means for controlling the flow of power to the light pressure unit, meansfor controlling the flow of power to the heavy pressure unit, said heavy pressure control means being connected in series with the light pressure control means, whereby the efi'ective operation of the heavy pressure control means is governed by the operation of the light pressure control means, means for operating said control means successively including a single operating member movable in opposite directions from neutral, operating connections between said operating member and the control means, whereby movement in one direction from neutral operates one control means and movement in the other direction from neutral operates the other control means, and means for locking the light pressure control means in its operated position,

said locking means being manually operable.

6. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including motor means and operating connections between the motor means and the movable element to actuate the movable element, control devices for controlling the flow of power to the motor means to effect respectively light pressure and heavy pressure between said elements, an operating member' normally arranged in neutral position and movable in one direction from neutral to operate the light pressure control device and in the other direction from neutral to operate the heavy pressure control device, means for holding the press closed, means for releasing the press, and means operated by the operating member upon movement thereof in one direction beyond the movement required to operate the heavy pressure control device to release the press of the action of the means holding it closed.

7. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including mo tor means consisting of two units, one unit including a light pressure cylinder and piston movable therein, and the other unit, a heavy pressure cylinder and piston movable therein, a feed line, control valve means connected in the feed line to control the flow of motive fluid to the light pressure cylinder, control valve means connected in series with the former control valve means and being connected to the heavy pressure cylinder through a pipe having a check valve therein,

a normally closed exhaust valve connected.

in said pipe, and an operating member operable to actuate the control valve means successively and having means to open the exhaust valve upon movement of the operating member beyond its movement required to open the heavy pressure control valve.

.8. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including motor means consisting of two units, one unit comprising a light pressure cylinder and piston movable therein and the other unit, a heavy pressure cylinder and piston movable therein, a feed line, control valves connected in the feed line to control the flow of motive fluid to the light pressure cylinder, control valves connected in series with the former control valves and connected to the heavy pressure cylinder through a pipe having a check valve therein, a normally closed exhaust valve connected in said pipe, an operating member operable to actuate the control valves successively and having means to open the exhaust valve upon movement of the opcrating member beyond its movement required to open the heavy pressure control valve, and manually controlled means for locking the light pressure control valve in its operated position.

9. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for actuating the movable element including motor means consisting of two units, one unit comprising a light pressure cylinder and piston movable therein and the other unit, a heavy pressure cylinder and piston movable therein, a feed line, control valve means connected in the feed line to control the flow of motive fluid to the light pressure cylinder, control valve means connected in series with the former control'valve means and con-- nected to the heavy pressure cylinder through a pipe having a check valve therein, a normally closed exhaust valve connected in said. pipe, an operating member operable to actuate the control valve means successively and having means to open the exhaust valve upon movement of the operating member beyond its movement required to open the heavy pressure control valve, manually controlled means for locking the light pressure control valve in its operated position and a second normally closed exhaust valve connected in said pipe, and the operating member having means for opening the second exhaust valve upon movement of said operating member to operate the light pressure valve means.

10. A garment or ironing press, comprising in combination, coacting press jaws, oper ating means to open and close the press in- .cludlng a low power motor and high power motor operatively connected with one press jaw to close the press by a multi step operation, a fluid pressure line connected with each cylinder, a control valve means in each line,

a single control pedal pivoted substantially parallel to the lengthwise position of an operators foot and having two engaging end portions one on each side of the axis by which an operators foot may depress either end portion to tilt the pedal, operating means between the pedal and each control valve means, whereby the operator may depress one end of the pedal to open one of the control valve means and energize the low power motor to close the press with light jaw contact, holding means to retain said valve open to main-,

tain the low power motor energized, and the depression of the other end of the pedal opens the other control valve to energize the high power motor to produce heavy jaw compresslon.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and State of New York, this 28th day of May, 1929.

Y ERNEST DAVIS.

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