US1934922A - Pressing machine - Google Patents

Description

"F. A. HEIDENFELDER Nov. 14,1933.

PRESSING MACHINE Filed Dec 22, 1930 4 Sheets-Sheet 1 VENTOR 7 W a ATTORNEY 3 o w 7 8 Z 7 3 4 2 1.2 6 p 7 .1. z m 1 fl r- M flu. w a Kl Z l 4 F m HHHHI 0/ 1%50541? MAI/220:7?

Nov. 14, 1933. F. A. HEIDENFELDER 1,934,922

PRESSING MACHINE Filed Dec. 22, 1930 4 Sheets-Sheet 2 INVENTOR 2/?50A/EQ/00V/2205R ATTORNEYS ,F. HElDENF PRESSING MACHINE Nov. 14, 1933' 4 Sheets- 3 1933- F. A. HEIDENFELDER 4, 2

PRESSING MACHINE Filed Dec. 22, 1930 4 Sheets-Sheet 4 Patented Nov. 14, 1933 A UNITED STATES PBESSING MACHINE 7 Fred Albin Heidenfelder, Chicago, 111., assignor to The American Laundry Machinery Company, Cincinnati, Ohio, a corporation of Ohio T Application December 22, ,1930 Serial No. 503,923

Claims.

My invention relates to pressing machines and, particularly, to a pressing machine comprising a stationary padded buck-and a heated movable head adapted to cooperate .therewith for the V I pressing operation.

In presses of this type, it is very desirable to combine as many operations as possible in one machine and to be able to perform any one particular operation on the machine without necessarily performing any one or all of the others or causing operation of any one or all of the other operating parts. It is also desirable to release and return all operating parts to their normal position in unison, utilizing power means for mov-- ing the several parts.

The objects of my invention are to provide-a pressing machine including a tail clamp, a neckband clamp and a movable pressing head in a single machine and so associated that all three devices can be released from their respective operated positions in unison; to provide a pressing machine including a tail clamp, a neckband clamp and a movable pressing head in which the parts 'are so arranged and connected that any one of the three devices can be operated for the purpose intended without interfering with any other;

and to provide a pressing machine wherein power' means is utilized for moving the above mentioned parts to their release position, I

Various other objects and advantageous features of my invention will be seen in the following description and one embodiment thereof may be seen in the accompanying drawings wherein similar characters of reference designate corresponding parts, and wherein:

.Fig. -1 is a side view showing what is normally the left-hand side of a pressing machine embodying myinvention; Fig. 2 is a front view of the machine shown in Fig. 1; Fig. 3 is a side view of what is normally the right-hand side of the pressing machine shown in Fig. 1 showing the tail clamp in clamping position; Fig. 4 is a sectional view of the power means for operating the head and associated parts; Fig. 5 is a diagrammatic sectional view showing the valve, cylinders, etc. employed to operate the tail clamp; and Fig. 6 is a diagrammatic sectional view of the valve for controlling flow of fluid pressure toand from the neckband clamp releasing means.

Referring to the drawings, I have shown what is known as a fullautomatic air operated press and, since the present invention pertains more specially to the combination of a heated pressing head, a neckband clamp and a tail clamp and (c1. se -9) operative positions either individually or in a unison, it is not deemed necessary to describe all of the parts of the entire pressing machine main structure in detail. However, as a partial description, the main frame 1 of the machine is provided with an upwardly extending arm 2 on the rearward side thereof at the extremity of which a head arm 3 is pivotally mounted as at 4 intermediate its ends. The forward end of the arm 3 carries a pressing head 5 which may be heated in any desired manner and is mounted to cooperate with a padded buck 6 when in its lowermost position, the padded buck being rigidly secured onthe uppermost end of the frame 1.- A toggle mechanism for moving the head 5 to its 7 lowermost position consists of links 7 and 8, one freeend of the link '7 being pivotally connected to the rearwardmost end of the head arm 3 as at ,9, the other free end of the link being connected to the main frame as at 10 and the adjacent free 7 v ends of the links being pivotally connected together as at 11. Such toggle is pivotally connected as at 12 to one end of a piston rod 13 which is operated by fluid pressure acting against a piston 14 and a cylinder 15, the fluid pressure acting 30 againstthe piston for the pressure stroke or for causing downward movement of the head 5. The head is moved upwardly after release of pressure against the piston 14 by means of springs 16 connected to the rear end of the head arm 3 and the frame 1 at their opposite ends.

As will be seen .in Fig. 2, a neckband clamping structure consisting of a fixed metallic curved block 17 secured to the pressing bed or. buck 6 and a relatively flat metallic band 18 for 00- operating with the block and mounted to swing into and out of-cooperative relation therewith and supported on the frame 1. The band 18 takes the form of a half circle together with straight side extensions and its ends are rigidly secured to a bar 19 having an extending lug at its center substantially in the form of a ring and embracing I an eccentric 20 formed on a shaft 21. Such shaft 7 21 is mounted in substantially the same horizontal plane with the neckband block 1'7 in suitable bearings formed on the upper end .of a vertical bar 22 which is supported on a horizontal pivot 23 formed in a bracket 24 secured to the main frame 1 in such manner that the shaft 21 can swing towards and away from the block 17 about the pivot 23. The lower ends of the bar 22 extend some distance below the pivotal point 23 and are held tightly to the right as shown in Fig. 2 and against a stop provided therefor by an admeans for releasing these various parts from their justable coiled expanding spring 25., With thisconstruction, the upper end of the vertical bar 22 will be held to the left as shown.

Referring to Fig. .1, the ring shaped lug on the bar 19 is provided with an annular slot 26 that extends about half-way around the lug and a pin, secured in the eccentric 20, extends into the slot. By this construction, considerable lost motion betweenthe rotation of the eccentric 20 and rotation of the ring shaped lug secured to the bar 19 carrying the semi-circular band 18 is made possible. Thus, when the shaft 21 is rotated in either direction, the pin extending into the slot 26 will not cause rotation of the lug on the bar 19 and movement of the band 18 until the pin has engaged the end of the slot.

A crank handle 27 is mounted on the front end of the shaft 21 and forms a means for rotating the shaft in either direction manually and the eccentric 20 is so positioned on the shaft 21 that the ring shaped lug with the bar 19 and the band 18 will be moved to the left and away from the buck as shown in Fig. 2 when the shaft'21 is rotated clockwise, the parts beiri'g moved in the opposite direction when the shaft is rotated counterclockwise. Clockwise rotation of the shaft 21 first causes the band to be swungjdownwardly to the right about the pivot 21 and adjacent the semi-circular portion of the neckband block 1'7. The extent of eccentricity of the eccentric 20 and the length of the band 18 with relation to the distance between the shaft 21 and the neckband block, is such that the semi-circular portion of the band will be pulled tightly against the semi-circular portion of the neckband block 17 when the shaft 21 is rotated to the limit of its movement clockwise. On counterclockwise rotation of the shaft 21, the semicircular portion of the neckband clamp is first moved slightly to the right of the semi-circular portion of the neckband block. Further turning of the shaft 21 will cause the pin to take against the end of the slot 26 and move the band 18 upwardly and to the left about the shaft 21 as the pivot, the band being finally moved to a position to the left of the vertical axis. of the shaft 21 so that it will remain in a substantially upright position by force of gravity.

In operation. the neckband of a shirt to be pressed is manually placed about the semi-circular portion of the neckband block 1'? while the shaft 21 is in its furthest counterclockwise position and the neckband of the shirt is tightly clamped to the block when the shaft 21 is manually turned clockwise to the limit of its movement, the neckband of the shirt being clamped between the neckband clamp and the neckband block by means of pressure exerted by the spring 25 at the lower end of the bar 22. Pressure exerted by the spring 25 is applied to the clamping band 18 because the movement of the band to the left resulting from the turning of the shaft 21 clockwise is greater than the normal slack or play between the band 18 and the block 17 which, of course, results in moving the lower end of the bar 22 away from the stop against which the spring normally presses it.

Turning of the shaft 21 counter-clockwise to release the neckband clamp from the neckband block may be done manually as just described but, in accordance with my invention, means have been provided for operating the neckband clamp by fluid pressure. This may be done by admitting fluid pressure to a cylinder 28 which is secured by means of a bracket 29 to the frame 1 and has the free end of its piston rod 30 pivot ally connected as at 31 to a forked rod 32 whose upper end is not forked and is provided with a rack bar 33 meshing with a small gear 34 rigidly mounted on the shaft 31. Thus, when air is admitted to the cylinder by way of a fluid pressure conduit 35 into the upper end of the cylinder 28, the piston rod 30 and rack bar 33 will be forced downwardly by downward movement of the piston in the cylinder to cause the shaft 21 to be rotated counterclockwise as shown in Fig. 2 to release the neckband clamp from the neckband block, the piston having been raised by movement of the band 18 to the right into clamping position. An antifriction roller 36 is provided on the bar 22 to retain the rack bar 33 in mesh with the gear 34.

One of the bearings at the upper end of the bar 22 in which the shaft 21 is journalled is extended upwardly to form' a cam 3'7 which contacts with and serves to tilt the bar- 19 with the band 18 thereon downwardly to the right when the eccentric 20 and the shaft 21 are turned clockwise. That is, the first part of the clockwise turning of the eccentric 20 andshaft 21 will -move the bar downward-to contact with the cam 3'7 which serves to guide the bar .19 .with the band 18 thereon to the right to pass the dead center or straight vertical position, after which the bar 19 and the band 18 thereon is free to drop by gravity into a position of cooperative relation 10;, with the semi-circular portion of the block 1'7. Then, continued clockwise turning of the eccentric 20 and shaft 21 will move the bar 19 and band 18 to the left to tightly clamp the semicircular portion of the band 18 against the semicircular portion of the block 17 due to the eccentric structure hereinbefore described. It follows that a counter-clockwise turning of the shaft 21 will reverse the sequence of operation of the parts. The cam at the upper end of the bar may be dispensed with and the upper end of the rack bar extended slightly to contact with the bar and tilt it in the same manner as above described as having been done by the cam.

With the construction just described, it will be noted that the shaft 21 can be turned counterclockwise by either manipulating the crank handle 2'7 or admitting fluid pressure to the cylinder 28 but the shaft 21 can be turned clockwise only by manipulation of the crank handle 27 to move the neckband clamp 18 into engagement with the neckband block 1'7.

A tail clamp structure is provided at the end of. the buck 6 opposite that. end which carries the neckband block 1'7 and consists of a horizontally disposed arm 3'1 mounted to swing about with a vertical sleeve 38 mounted for rotation to the rear of and below the end of the buck whereby the arm 37' may swing to a position a short distance below the buck with its extremity in a vertical plane in front of the buck as shown in Fig. 3. 'The arm 37' supports a thin flat band .39 curved to substantially coincide with the curvature ofthe top side of the buck 6 and having one of its ends secured to the free end of the arm 37' and its opposite end secured to an arm 40 pivotally mounted to swing in a vertical plane at the other end of the arm 37' and adjacent the pivotal sleeve 38 so that when the arm 3'7 is swung to extend longitudinally from front to back across the transverse axis of the buck it will lie in a position just below the buck and the band 39 will lie in a position just above the buck.

The sleeve 38is mounted to freely turn on the outer periphery of a cylinder 41 between upper and lower perforated ears 42 on the bracket rigidly bolted to the frame arm 2 as shown in Figs. 2, 3, and 5, the cylinder 41 extending loosely through the sleeve 38 and through both earsv of the bracket to which ears it is rigidly secured. At its lower end, the cylinder 41 is closed and the upper end thereof is provided with a stufllng box through which a piston rod 43 extends and carries on its upper exposed end a flange '44 pro-' vided with an annular groove into which diametrically opposed pins 45 extend, the pins pass- I ing into or through a forked arm on the arm 40.

With this construction, when fluid pressure is admitted to the upper end of the cylinder 41 by way of pipe 46, the piston rod with the flange 44 thereon will be forced downwardly carrying the outer end of the forked arm down and swinging the upper end of the arm 40 in a direction to cause a pull on the'flat band 39, a coiled expanding spring 47'being provided beneath the piston in the cylinder 41 for moving the piston the free end of a vertically extending arm of a bell crank lever 50 that is pivoted to a stud extending horizontally from a bracket 51 secured to the frame 1. The end of the horizontally extending arm of the bell crank lever 50 is pivotally connected to the upper end of a piston rod 52 extending up from a piston within a cylinder 53 that is secured to the bracket 51. As shown in Fig. 5, a coiled expanding spring 54 within the cylinder 53 normally yieldingly holds the piston and piston rod 52 in their lowermost position and when fluid pressure is admitted into the lower end of the cylinder through a pipe 55 provided therefor, the piston rod 52 will be sure is released from beneath the piston, theparts will be reversed as to movement by the spring 54.

In the operation of this part of the apparatus, as seen in Fig. 2, the normal position of the arm 37 is to the right and rearwardly of the buck 6 and, as shown in Fig. 3, the clamping position of the arm is substantially at right angles to the longitudinal center line of the buck. When the sleeve 38 is turned by admitting fluid pressure to the cylinder 53, the arm 3'7 is swung from its normal position to its clamping position as hereinbefore described and is swung back to its normal position by the spring 54 within the cylinder 53 when fluid pressure beneath' the piston is released. In order to synchronize, the pull on the flat band 39, which moves it into 0perative engagement with the work on the buck 6, with the movement of the clamping band into and out of position over the buck, a fluid pressure vent 56 is provided in the cylinder 53 and so located that it will be uncovered by the piston when the piston and piston rod are substantially in their uppermost position wherein the clamping band has been swung to a position over the buck. The fluid pressure supply at the end of the pipe 46 that delivers fluid pressure above the'piston in the cylinder 41 whose downward .tion, fluid pressure will flow througdi the pipe .53, the fiat band 39 will. be moved into unclamped position prior .to swinging of the arm 37-and movement causes a pull on the flat band 39, leads from the vent 56 to the upper surface of such piston. Thus, immediately after the arm 3'? and band carried thereby has reached clamping posi- 46 and into the cylinder 41 to move the piston therein downwardly and cause a pull on the flat band 39 to move the band against the work on the buck 6. On the exhaust of fluid pressure from above the pistons in the cylinder 41 and band. to the position shown in Fig. 2.

It will be understood that a shirt to be ironed or pressed is laid upon the buck 6 so that the tail of the shirt, is on the. right-hand end of the buck as shown in Fig. 2 and in a position where it may be clamped between the flat band 39 and the upper .padded surfaces of the buck. In operation, after the proper lay is made, the neckband clamped between the band 18 and the block 17 as hereinbefore described, and the tail of the shirt clamped between the band 39 and buck 6,

the head 5 is moved into pressing engagement with the buck 6 by admitting fluid pressure to the cylinder 15 to cause movement of the head through the toggle mechanism previously described and against the resistance of the springs To guard against accidents, particularly Ito the hands of the press operator, the movement of the head 5 into pressing engagement with the buck 6 and subsequent final pressure or squeeze" between the head and buck are controlled by a plurality of valves that make it absolutely necessary for the operator to depress or hold two valves in an open position, the valves being located in-a convenient position at the front of the ma- :chine and so remote from one another that it is impossible to operate both valves by the use of one hand. Such valves 57 are of the ordinary closed type and are normally held in closed position by suitable springs. A fluid'pressure supply pipe 58 is connected to the inlet port of one of the two valves 57 and the outlet of one 5 valve is connected by a pipe 59 to the inlet of the other valve 57, the outlet from this last valve- 57 being connected by a pipe 60 with a valve 61 which controls the flowof fluid from the cylinder 15 to an exhaust port 62 as well as the flow of fluid from the inlet to the piston 14 as shown in Fig. 4. Such valve 61 is of the floating type and is normally held in open position by a spring 61 and a plunger 60' as shown to permit fluid from the cylinder 15 to escape through the ex haust port 62, and is moved to close the exhaust by fluid pressure when fluid is admitted through the pipe 60, the valve 61 opening a passage way for fluid to pass from the pipe 60 to the cylinder 15 at the same time it closes the exhaust. Since the outward movement of the piston 14 and piston rod' 13 causes movement of the head 5 into pressing engagement with the bed 6 and since the valve 61 will immediately be moved to open the exhaust port should fluid pressure be out off from entering the cylinder by closing of either valve 57, it will be understood that unless both valves 57 are operated the pressing; head will not be moved into engagement .with the buck.

The above safety. feature of the, two valves 57 is only required while the head 5 is still out of contact with the buck 6, there being no more danger of injury to the operators. hand after the head and buck are in engagement. Hence, provision is made whereby fluid pressure is admitted to the cylinder through another passage other than the pipe 60 after the head and buck are in contact. To this end a fluid pressure duct in the form of a pipe 63 connects the passageway leading to the cylinder 15 with the outlet port of a valve 64 which is normally held in closed position by a suitable spring 64 as shown in Fig. 5. This valve 64 has its inlet port connected to a source of fluid pressure by a pipe 65 and is arranged to be moved to open position by the short arm of a bell crank lever 66 pivotally mounted as at 67 to a lug extending upwardly and move the plunger to the left.

from the cylinder casing. The long arm of the bell crank lever 66 extends horizontally above the cylinder 15 and the piston rod 13 and is provided with a roller 68 on its extremity arranged to ride on a bar 69 attached to and traveling with' the piston rod 13. Such roller 68 is yieldingly pressed downwardly against the bar 69 by one or more springs 70 so that when the piston rod reaches its outermost position to move. the head into contact with the buck the roller 68 will be -moved into a notch or reduced portion 71 in the bar .69. Such downward movement of the long arm of the bell crank lever 66 will cause the short arm thereof to contact with and move the valve 64 to open position and permit fluid pressure to pass from the pipe 65, through the valve 64, through the pipe 63 and into the passageway leading into the cylinder 15. It will be apparent that such passage of fluid pressure will take place when the valve '61 is in open position to permit passage of fluid pressure to the cylinder 15 in the manner hereinbefore described whereby such fluid pressure will be effective to retain the valves 61 in such position. Thus, closing of either or both valves 57 will not affect the position of the valve 61 and the'pressure of the head 5 on the buck 6 will remain constant until the fluid pressure in the cylinder 15 is released.

To release the fluid pressure in the cylinder 15 with the least possible loss of fluid, the fluid supplying valve 64 must be slightly closed before the exhaust port 62 is opened and this action is accomplished by means of a bell crank lever 72 pivotally mounted as at 73 to an upwardly extending lug on the cylinder casing. The upwardly extending arm of the bell crank lever '72 is positioned to engage the protruding end of the stem of the valve 61 and is provided with a cam surface 74 to engage and depress the free end of a third arm '75 on the bell crank lever 66. In normal unoperated position, the bell crank lever 72 is out of engagement with both the stem of the valve 61 and the arm '75 of the bell crank lever 66 and is yieldingly held in such position by the coiled contracting spring '76 as shown in Figs. 1 and 3 attached to a foot treadle 77 pivotally mounted as at '78 on the base of the frame 1 and which is operatively connected by a link 79 to the free end of a horizontally extending arm of the bell crank lever '72.

During such operation of the bell crank lever 72, as shown in Fig. 4, the upper free end of the bell crank lever will move to the left whereby it will strike the outer free end of the plunger 60' Such movement of the plunger 60 will result in movement of the valve 61 to .open a passage between the cam surface 74 'depress the arm of the bell crank lever 66 which will move the upwardly extending arm of the bell crank lever 66 away from: the stem of the valve 64 and permit the valve ftox.

be moved to a closed position by the spring means? 64' to thereby shut off the flow of fluid pressurei to the cylinder 15. As soonas the fluidpress'ure.

is shut oif from the cylinder 15', the valve; 61. is moved to a position to open the exhaust passage .to

the port62 by the upward extending arm of the bell crank lever -72 whereupon fluid pressureis released from the cylinder 15'to permit thesprings 16 to return the head 5 -and:the piston 14in the cylinder to their normal unoperated position.

As shown in Figs. 1 and=2,-:a1rockshaftl80 mounted inl'suitable bearings at. thelfonward per end of the frame 1 and has 'ari-arnria'lrigid-l. 1y fixed thereto whose free end is operatively con-. nected by a link 82 tothe' foot treadle 77 in such" manner that the rock shaft 80 will berotated each time'the foot treadle is depressed. Such rotation of the. rock shaft 80 which is accomplished by depression of the treadle 7'7 and throughthe link 82 and arm 83 operates a valve 84 by move-' ment of the inlet and exhaust valve members 84' as, for example, to the opposite of the positions shown in Fig. 6 to close off exhaust from the cylinder 28 above the piston therein through pipes 35 and 85 and to admit fluid pressure from a source of supply through a pipe 85 into the upper end of the cylinder28 through the pipe 35 which will release the neckband clamp as hereinbefore described. Also, such rotation of the rock shaft 80 will open a valve 86 to permit the fluid pressure from the cylinder 53 to escape to the atmosphere which, as hereinbefore described, will release the tail clamp from operative engagement with the goods on the buck. Opening of the valve 86 is accomplished by means of a shouldered collar8'7 (see Fig. 2) rigidly mounted; on the shaft 80 and taking against another shouldered collar 88 that is rigidly mounted on a shaft 89 whereby rotation of the shaft 80 by depression of the treadle '77 will result in rotation of the shaft 89. Thus, depression of the foot treadle 77 will release all three pressure elements, namely, the head 5, the neckband clamp and the tail clamp in unison.

In order to admit fluid to and release fluid from the cylinder 53 for causing operation of the tail clamp as hereinbefore described, another valve 90 is disposed adjacent the valve 86 and connected thereto as shown in Fig. 5. Opening the valve 86 releases fluid pressure from the cylinder 53 andopening the valve 90 admits fluid thereto. Obviously, both valves 86 and 90 are never ordinarily 'inan open position at the same time. However, to make it impossible to open both of the valves at the same time and thereby provide a further safety measure, the valves arearranged to be opened by a single lever 91 rigidly mounted on the shaft 89 which is in a vertical plane midway between the exposed ends of the two valve stems, the forward end of the lever extending out some distance and terminating in a handle. The lever 91 is arranged to contact with and move the valve stems of the respective valves 86 and 90 so that when the handle of the lever 91 is depressed or moved downwardly the valve 90 will be opened and the tail clamp will be moved to a clamped position by the admission of fluid to the cylinders 53 and 41 as hereinbefore described. Upward movement of the'handle of the lever 91 will open the valve 86 and close the valve 90 whereby fluid pressure may exhaust from the cylinders 41 and 53 to permit return or the tail clamp mechanism to its normal unoperated position as also hereinbefore described. Both valves 86 and 90 are yieldingly held in a closed position by springs.

As seen in Figs. 3 and 5, the pipe 93 leading from-a source of fluid pressure supply is connected to the valve'90 abovethe valve seat and when the valve is opened the iluid is free to pass to the chamber below the valve seat and through the pipe 55 into the cylinder 53 to set the tail clamp in an operated position. The chamber of the valve 86 above the valve seat is connected by means of an internal duct 94 to the chamber of the valve 90 below the valve seat so that it is in free communication with the pipe 55 at all times. Likewise, the chamber in the valve 86 below the valve seat is connected with outside atmosphere so that when the valve 86 is opened any fluid pressure that may be in the pipe 55 or cylinders 41 and 53 will flow into the atmosphere. With this construction, it will be apparent that if the handle of the lever 91, is moved downwardly the "tail clamp will be moved to an operated position and if the handle is moved upwardly the tail clamp will be 'released and will be moved to an unoperated position.

Lever 91 is rigidly mounted on one end of the shaft 89 which extends loosely through a bearing 95 on the frame 1 and has rigidly mounted on its opposite end the shouldered collar 88 hereinbefore described and spaced a short distance from the bearing 95. A coiled expanding spring 96 is interposed between the bearing 95 and the collar 88 to provide sufficient frictional contact for holding the shaft 89 in whatever position it is moved to, namely, ii the handle of the lever is moved downwardly it will remain in downward position until manually moved upwardly and vice versa. The shafts 80 and 89 are in alignment and their shouldered collars 8'7 and 88 abut goods on the padded buck, the spring 47 in the cylinder 41 is stronger than the spring 54 in the cylinder 53 so that the piston in the cylinder 41 will always return to its normal unoperated position before or ahead of the piston in the cylinder 53 when fluid pressure is permitted to escape through the pipes 46- and 55 and the valve 86. Thus, the band will always be moved upwardly or released from the goods prior to the movement of the arm 37 and band 39 to a position to the rear of the buck.

Referring to the drawings and the preceding description, it will be seen that I have provided a device wherein a plurality of operations, namely, movement of a tail clamp, a neckband clamp and a pressing head outof operative engagement" with work in a pressing machine may be done simultaneouslyand in unison.

What I claim is: i

1. Apparatus of the class described, comprising a pressing head and a, pressing bed movable relative to each other, means for moving said head into and out of pressing engement with said.

control means'for controlling the release of said pressing head whereby it may be moved to separated position relative to said bed, and means whereby said last named control means is eti'ective to cause operation of the said'power means for moving said tail clamp from-operative to inoperative position simultaneously with release or said head. I

2. Apparatus oi the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head into and out of pressing engagement with,

said bed, a tailclamp, power operated means for moving said tail clamp into and out of operative position, operator-operated control means for said power operated means, operator-operated control means for \controlling the movement of said head into pressing relation with said bed, and operator-operated control means for controlling the release of said pressing head whereby it may be moved to separated position relative to said bed, and means whereby said last named control means is effective to cause operation of the said power means for moving said tail clamp from operative to inoperative position simultaneously with release of said head.

3. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to eachother, means for moving said pressing head into and out of pressing engagement with said bed, a neckband clamp adapted to cooperate with said bed, operator-operated means for moving said neckband clamp into operative position, power operated means for moving said neckbandclamp into inoperative position, operator-operated control means for controlling movement of said pressing head into pressing relation with said bed, and operator-operated control means for controlling release of said pressing head whereby it may be moved to separated position relative to said bed, and means whereby said last named control means is effective to cause operation of said power means for moving said neckband clamp from operative to inoperative position simultaneously with release of said head.

4. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head into and out of pressing engagement with said bed, a tail clamp, power operated means for and operator-operated control means for controlling release of said pressing head whereby it may be moved to separated position relative to said bed, and means whereby said last named control means is effective to cause operation of said power means for moving said tail clamp and said neckband from operative to inoperative position simultaneously with release of said head.

5. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head into and-out of pressing engagement with said bed, a tail clamp, power operated means for moving said tail clamp into and out of operative position, means for controlling the operation of said power operated means, a neckband clamp adapted to cooperate with said bed, operator-operated means for moving said neckband clamp into operative" position, power operated means for moving said neckband clamp into inoperative position, operator-operated control means for controlling movement of said pressing head into pressing relation withsaid ,bed, and operatoroperated control means for controlling release of said pressing head whereby it' may be moved to separated position relative to said bed, andmeans whereby said last named control means is effective to cause operation of said power means for moving said tail clamp and said neckband clamp from operative to inoperative position simultaneously with release of said head.

6. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head and bed into and out of pressing engagement, a tail clamp, power operated means for moving said tail clamp into and out of operative position, operator operated control means for said power means, a neckband clamp, operator operated means for moving said neckband clamp into operative position, power operated means for moving said neckband clamp out of operative position, and a single operator operated control means effective to cause movement of said tail clamp and said neckband clamp out of operative position simultaneously.

7. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head into and out of pressing engagement, a tail clamp, power operated means for moving said tail clamp into and out of operative position, operator operated control means for controlling the movement of said head and bed into pressing engagement, a maintaining means for maintaining said head and bed in pressing engagement irrespective of the condition of said operator operated control means, operator operated control means for controlling the movement of said head and bed to separated or full open position, and means whereby said last named control means is effective to cause operation ofsaid power operated means for moving said tail clamp from operative to inoperative position simultarieously with separation of said head and bed.

8. Apparatus of the class described, comprising a pressing head and a pressing bed movable relative to each other, means for moving said head and bed into and out of pressing engagement, a tail clamp, a power operated means for moving said tail clamp into and out of clamping alignment with said bed, a power operated means for moving said tail clamp into and out of clamping engagement with said bed, operator-operated control means for said first named power operated means, and connections between said first named and said secondnamed power operated means whereby said second named power operated means is energized by operation of saidfirst named power operated means.

- 9. A work holdingmeans for. use with a pressing machine including a buck, said work holdingmeans comprising a vertically disposed cylinder andpiston, a frame pivotally'mounted on a vertical axis and carrying a work'clamping band, said frame beingswingable to position said band in operative position above said buck andin inoperative position away from said buck, a connection between said piston and said band whereby movement of said piston produces vertical movement of said clamping band into and out of clamping engagement with said buck, means for swinging said frame including a cylinder and piston and a connection between said piston and said frame, a single operator-operated control means for controlling operation of said last named piston, and means whereby operation of said first named piston to produce clamping engagement of said band with the buck is dependent on the operation of the piston effective to produce swinging movement of said frame to position said band.

10. A work holding means for use with a pressing machine including a buck, comprising a vertical cylinder and piston, a swingable frame pivotally mounted on a vertical axis, a bell crank carried thereby, a work clamping band carried by said frame and having one of its ends attached thereto and the other of its ends attached to one arm of said bell crank, a connection between said piston and the other arm of said bell crank, whereby movement of said piston will produce vertical movement of said clamping band into and out of clamping engagement with said buck, means for swinging said frame to position said band in operative position above said buck and in inoperative position away from said buck, in cluding a cylinder and piston, a connection between said piston and said frame, a single operator-operated control means for controlling operation of said last named piston, and means whereby operation of said first named piston to produce clamping engagement of said band is dependent on the operation of the piston which is effective to produce swinging movement of said frame to position said band.

FRED ALBIN HEIDENFELDER'.

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