US2724225A

US2724225A - Packaging machine

Info

Publication number: US2724225A
Application number: US187116A
Authority: US
Inventors: Haidegger Hans
Original assignee: Ebauches SA
Current assignee: Ebauches SA
Priority date: 1949-11-04
Filing date: 1950-09-27
Publication date: 1955-11-22
Anticipated expiration: 1972-11-22

Description

Nov. 22, 1955 H. HAIDEGGER PACKAGING MACHINE 16 Sheets-Sheet 1 Filed Sept. 2'7. 1950 Nov. 22, 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 l6 Sheets-Sheet 2 Nov. 22, 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 16 Sheets-Sheet 3 1 2 11 I h P o o'@ c 89 Q 269 I 72 7 A 0 6 9 o a Nov. 22, 1955 H. HAIDEGGER PACKAGING MACHINE 16 Sheets-Sheet 4 Filed Sept. 27. 1950 aw ww WM Nov. 22, 1955 H.- HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 16 Sheets-Sheet 5 Nov. 22, 1955 HAlDEGGER 2,724,225

PACKAGING MACHINE Nov. 22, 1955 H. HAIDEGGER PACKAGING MACHINE 16 Sheets-Sheet 7 Filed Sept. 27, 1950 wk mm 22, 1955 H. HAIDEGGER 4,225

PACKAGING MACHINE Filed Sept. 27, 1953 16 Sheets-Sheet 8 r76 r54 155156157 159 reo V- 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27. 1950 16 Sheets-Sheet 10 2 1 I I m I .98, w 288 I 1 289 zas zya 282 Nov. 22, 1955 H. HAIDEGGER PACKAGING MACHINE l6 Sheets-Sheet 11 Filed Sept. 27, 1950 Nov. 22, 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 16 Sheets-Sheet l2 r92 5 F 266 1, 0 m

Nov. 22, 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 16 Sheets-Sheet l5 Nov. 22, 1955 H. HAIDEGGER PACKAGING MACHINE 16 Sheets-Sheet 15 Filed Sept. 2'7, 1950 NJOJ 2f! Nov. 22, 1955 H. HAIDEGGER 2,724,225

PACKAGING MACHINE Filed Sept. 27, 1950 15 Sheets-Sheet l6 I55 I56 I59 160 I58 United States Patet'ltO PACKAGING MACHINE Hans Haidegger, Soletire, Switzerland, assignor to Ebauches S. A., Grenchen, Switzerland The present invention relates to machines for making packings for small parts such as watch repair parts or the like, and particularly to a machine for making the packings from bands of rolled material.

In supplying watch repair parts, it is desirable that the parts be individually packaged or that only a few parts be enclosed in a single packing. The packing protects the repair part from damage by the effects of atmospheric conditions, and provides a means for handling the small parts without loss. The packing must be strong yet light in weight and of inexpensive construction.

An object of the invention is .to provide a machine for fabricating packings from a roll or band of material.

Another object of the invention is to provide a machine for. fabricating packings immediately preceding the insertionof the repair parts therein so as to make unnecessary a provision for storage of the packing.

Another object of the invention is to provide a machine for placing a cover in position and sealing the packing immediately after the insertion of the repair part therein.

Other objects and features will be apparent as the following description proceeds, reference being had to the accompanying drawings illustrating by way of example one embodiment of my novel machine, and wherein Fig. lis a diagrammatic front view of the machine,

Fig. 2'is a side view of the machine, partly in section, L Fig. 3 is a top view of the middle portion of the machine,

Fig. ,4 is a front view of one of the partly in section,

, Fig.5 is a top view of the die of the tool for punching the band material for the' packing bodies with a reel for the band material and illu'strating a lower guide roll for the punched bands between the. punching tool and the press in section,

.Fig. 6 is a top view of the die for punching the band material for the packing bodies, and a section through the upper guide roller between the punching device and the press, a

1 Fig. 7 is a top view of the tool for punching the band material for the packing bodies (aluminium),

Fig. 8 is a top view of the die of the tool for punching the band material (paper or carton) for the. covers,

Fig.9 is a top view of the punch cooperating with the die shown. in Fig. 8,

n Fig. ,10 is a top view of the mechanism for advancing the pre-punched band material for the packing bodies to the revolving table ofthe middle portion of the machine,

Fig. 11 is. a vertical section through Fig. 10,

Fig. 12 is a top view of a portion of the pre-punched band material for the packing bodies,

. Fig. 13 is a top view of the mechanism for feeding the pre-punched band material for the covers to the revolving table, i

Fig. 14 is a vertical section through Fig. 13, i

Fig. 15 is a top view of a portion of the pre-punched band material for the covers,

punching devices,

' Fig. 23,

ice

Fig. 16 is a plan view of the driving device for the advancing mechanisms shown in Figs. 10 and 13,

Fig. 17 is a view of the device of Fig. 16, taken in the direction of the arrow A of Fig. 16,

Fig. 18 is a vertical section of the gear pump con stituting the liquid coupling and of control means for the support of the cutting, drawing and closing tools of the press,

Fig. 19 is a section along the line 13-13 of Fig. 18,

Fig. 20 is a plan view of the release mechanism cooperating with the gear pump for driving the support of the cutting, drawing and closing tools of the press,

Fig. 21 is a vertical section of the revolving table and its bearing and of a portion of the cylinder of the air pump delivering air for ejecting the completed, filled packings out of the table,

Fig. 22 is a plan view of the revolving table,

Fig. 23 is a side view of the hand-controlled lever with its safety device,

Fig. 24 is a partial sectional view of the parts of Fig. 23 in a viewing direction turned 90 from the showing of Fig. 25 is a top view of the parts shown in Figs. 23 and 24,

Fig. 26 is a side view of a control device and a sectional view of the pin clutch of the drive for the cutting, drawing and closing tools of the press,

Fig. 27 is a top view corresponding to Fig. 26,

Fig. 28 is an axial section through the fly-wheel and the pin clutch of the driving device for the tool support mentionedin connection with Fig. 26,

Fig. 29 is a section along the line C*C of Fig. 28,

Fig. 30 is a section along the line D--D of Fig. 28,

Fig. 31 is a section along the line E-E of Fig. 28, and

Fig. 32 a section along the line F-F of Fig. 28,

Fig. 33 is a front view of the middle portion of the machine with the support for the cutting, drawing and closing tools of the press,

Fig. 34 is a vertical section of the first cutting and drawing tool of the support and of the adjacent portion of the revolving table,

Fig. 35 is a vertical section of the second cutting and drawing tool of the support and of the adjacent portion of the revolving table, while Fig. 36 is a vertical section of the closing tool of the support and of the adjacent portion of the revolving table,

Fig. 37 is a vertical section of v the closing tool of Fig. 36 with its operating means,

Fig. 38 is a vertical section of the tool support, showing the bearings of the tools for Figs. 34 and. 35,

Fig. 39 is a bottom view of the tool support and of the tools shown in Figs. 34, 35 and 36, with the guide columns for the support in section,

Fig. 40 is a side view of the middle machine,

Fig. 41 shows a detail of the drive for the punching devices, while Fig. 42 is a section to Fig. 41,

Fig. 43 is a plan view of a completed. packing made portion of the with the machine as illustrated,

. upper edge 3 of the packing body.

In order to facilitate an understanding of the details do'sb'ribed later on, the main part of the machine may at first be briefly described with reference to Fig. 1.

The bandmaterial supplied for the packing bodies and the covers 2 is wound up on reels 4 and 5 respectively. These reelsare rotatably mounted on the machine frame 22. In order to avoid tearing of the thin bands when pulling them olf the reels, the reels 4 and 5 are automatically controlled to provide supply loops 6 and 7. For this purpose, the reel 4 is driven by a motor 8 and the reel 5 by a motor 9. The

motors

8 and 9 are controlled by means of switches 10 and 11 comprising swivelling arms 12 hearing against the lower portion of the loops 6, 7. As the

motors

8 and 9 are started by the switches 10 and 11,

V the reels 4 and 5 rotate and unroll band material whereby the loops 6 and 7 are enlarged. The arms 12 then follow the loops by rocking downwardly to a certain position to operat'e the switches 10 and 11 in such a way that the

motors

8 and 9 are switched off. When the supply loops 6 and 7 are shortened while the

motors

8 and 9 are at rest, the arms 12 follow the loops upwards to a certain position, to again switch on the

motors

8 and 9 by means of the switches 10 and 11, so that the above-described cycle begins anew.

The supply loops 6 and 7 are drawn into punching devices a or b by means of devices c or a'. Both punching devices a and b are driven by a single motor 12' while the drive of the devices c and d is derived from the drive of the punching devices a and b. The band material punched as shown in Figs. 12 and moves away from the devices 0 and d and forms a

loop

13 or 14 extending over the band material on the reel 4 or 5 and over a guide roller of the device a or d to the middle portion of the machine. The punching devices a and b work periodically and only as long as is necessary to provide sufficiently large punched

loops

13 and 14. For this purpose the motor 12 is controlled bya switch 15 comprising a swivelling arm 16 hearing against the lower portion of the pre-punched loop 14. 1 f the punching devices a and b and the devices c and d are in operation, the

loops

13 and 14 are enlarged and the arm 16 moves downwardly to a certain position where the motor 12 is started by means of the switch 15. Qn the motor 12' being at rest, the pre-punched loops 1'3 and 14 running to the middle portion of the machine are reduced and the loop 14 turns the arm 16 upwardly to a position to again start the motor 12' through the switch 15 so that the punching devices a, b and the deareas 6 and i1 again operate and the above-described cycle is repeated.

The prepnnened band material is carried towards a re- 661mg table designated by 18 in Fig. 3 by means of an advance mechanism e. This revolving table 18 and the advance mechanism e are part of the middle portion of the machine. The revolving table 18 carries formers or dies for receiving the p'acking's and will be described later on. The middle portion of the machine further comprises a press fdnven by a central drive (motor 19) through a belt drive '23, 24. The press f has cutting, drawing and seam ing tools above the table 18. Thesetools will be described later on. The central motor 19 drives a sprocket 131 (fig, 18) of a liquid pump with the aid of a

belt drive

20, 21, a shaft 310, a

bevel gear

311, 312, a vertical shaft 313 with a sprocket 314 and through the chain 315. The liquidpump is a gear pump best shown in Figs. 18 and 19 and which oont'r'ols the revolving table 18, the advance mechanisms and the press 1.

The mounting and the drive for the reels 4 and 5 are best represented in Figs. 4 and 5. The hub of the reel 4" barrios lateral disks 26 and is loosely carried on a pin 27. The pin 27 is screwed to a bracket 28 of the machine name The motor 8 for driving the reel 4 is mounted on the bracket 28 in such away that it may be swung about an axis vertical to its shaft. For this purpose and as is shown in Fig. 4, the motor 8 is held by two screw bolts 29 of the bracket 28 in such a manner that it may be swung in a horizontal plane by a spring 31 fixed to the raster 8 and to a pin 30. The motor shaft 32 carries 5 friction roller 33 engaging one of the flanges 26 of the reel 4 and is pressed against the flange 26 by means of the spring 31. The motor 8 thus drives the reel 4 by means of a friction effect between the roller 33 and one of the flanges 26. The mounting of the reel 5 and its drive by the motor 9 as well as the mounting of the latter are similar to those of the supply roll 4.

The electric connections between the switches 10 and 11 and the appertaining

motors

8 and 9, as well as the design of the switches 10 and 11 are not shown in th drawing as they are well known to those skilled in the art.

The arrangement and design of the punching devices a and b and of the advance mechanisms 0 and d are as follows:

A block 34 fixed to the machine frame 22 carries the dies of the punching devices. The die 35 of the punching device a is shown in Fig. 5 and the die 36 of the punching device I; in Fig. 8. The block 34 has two guide sleeves traversed by columns 37 of the punch carrier 38 and are mounted in the sleeve by means of balls 39 to move to and fro. The punch carrier 38 of the punching device a carries a punch 40 according to Fig. 7 adapted to cooperate withthe die 35 while the corresponding punch carrier of the punching device b carries a punch 41 according to Fig. 9 adapted to engage the die 36. Punch 40 and die 35 are shaped in such a way that by their cooperation holes 42 and cut-

outs

43 and 44 are made on the aluminium band for the packing casings (Fig. 12), while by the action of the die 36 and the punch 41 the cut-outs 45 of Fig. 15 are made in the paper or carton band for the packing covers. On the end away from the carrier 38 the columns 37 carry a cross-head 46 wherein a cylinder 47 is rotatably mounted. A rod 48 is screwed into this cylinder 47. Below the crosshead 46 a double-armed lever is rockingly mounted on the machine frame 22 by means of a pin 49. This pin 49 carries the abovementioned pin 30 to which the spring 31 engaging the motor 8 is attached. The one arm of the lever 50 includes a rotatable cylinder 51 into which the other end of the rod 48 is screwed. A connecting rod 52 is linked to thefree end of the other arm of lever 50, the other end of this rod 52 being connected to an eccentric 53 by means of a pin 54 (Figs. 1, 41 and 42). The eccentric 53 comprises a radial slot 55 (Fig. 41) which is traversed by the pin 54. This pin may be adjusted along the slot 55' for adjusting the stroke of the carrier 38. A gear wheel 56 is rigidly connected with the eccentric 53-, this wheel engaging a pinion 57 of the motor 12;

The following drive for the device c is derived from lever 50 of the punching device a:

Between the punching device a and the middle portion ofthe machine an advance roller 59 is looselymounted on an axle 58 screwed to the machine frame. The ratchet wheel 60 of a ratch and pawl mechanism is integral with the advance roller 59. A lever 61 on 'which the pawl 62' is rockingly mounted is loosely arranged on the axle 58. A spring 63 engages the pawl 62 and a pin 64 and presses the peak of the pawl against the ratchet wheel 60. A link 65 is connected to the lever 61 by means of the pin 64, this link being pivoted to the lever 50. A one-armed lever 66 rockingly mounted on the machine fr'ame 22 carries on its free end a guide roller 67 which is es e cially illustrated in Fig. 6. The band material 13 leaving the punching device a passes between the roller 59 and the guide roller 67 urged together by a spring 68 engaging between the lever 66 and the machine frame 22-.

With the exception of the connecting rod '52, the design and the drive of the punching device b and the device d are similar to those of the devices a and c. The only difference resides in the fact that for the punching device b no separate driving motor is provided, in that the drive is derived from motor 12' through a rod 69 as follows:

linked to the levers 50 of the two and b.

The manner of operation of the punching device a and of the device 0 and accordingly the manner of operation of the punching device b and of the device d are punching devices a In the position shown in Fig. 4 the carrier 38 with the punch is removed from the die 35 and the band 13 can freely pass between. the punch and the die. The eccentric 53 turns in the anticlockwise direction (Fig. 1) and swings the lever by means of the connecting rod 52in the anticlockwise direction. Therefore, the carrier 38 is further lifted by means of the rod 48, the crosshead 46 and the columns 37. In Fig. 4 the rod 65 is being moved upwardly by means of the lever 50 and the lever 61 carrying the pawl is turned in the clockwise direction (Fig. 4). As the pawl 62 engages a tooth gap of the ratchet wheel it moves the latter and the advance roller 59 in the clockwise direction (Fig. 4). Thereby the band 13 pressed against the roller 59 by means of the roller 67 is moved towards the right in Fig. 4, so that the supply loop of the punched band 13 is enlarged. As soon as the band 13 has been advanced by a certain length the pin 54 of the eccentric 53 is in its right hand dead center position (Fig. l) and on a further rotation of the eccentric 53 in the anticlockwise direction in Fig. l the movement of the connecting rod 52 is reversed. The double-armed lever 50 is swung in the clockwise directionofFig. 4 and draws the carrier 38 with the punch 40 downwardly by the intermediary of the rod 48, the crosshead 46 and the columns 37, so that the punch 40 cooperates with the die 35 and stamps out the holes 42 and the cut-

outs

43 and 44 of theband 13 as shown in Fig. 12. During this motion of the lever 50 in the clockwise direction, the rod is pulled downwardly in Fig. 4 and the lever 61 carrying the pawl 62 is swung in the anticlockwise direction. The brake not described in detail of the roller 59 (Fig. 5) prevents the roller 59 from rotating backwards in the anticlockwise direction owing to the friction efiect between the roller 59 and the pawl 62 or the lever 61. Therefore, during the punching operation the band 13 is entirely at rest. The last-mentioned motion of the carrier 38 and the stoppage of the

rollers

59 and 67 lasts untilthe eccentric pin 54 has reached its left hand dead center position in Fig. 1. Then all the movements are reversed and the cycle begins again and is repeated until the supply loop of the punched bands is large enough to allow the lever 16 to disconnect the motor 12 by means of the switch 15. Exactly the same motions as described above with regard to the punching device a and the device c are imparted to the punching device b and the device d through the rod 69. For this reason describing the manner of operation of the punching device b and the device d can be dispensed with.

A straight line guide 71 is fixed to the machine frame 22 between the revolving table 18 and the device c while another straight line guide 72 is mounted on the machine frame 22 between the revolving table 18 and the device d. The position of these straight line guides 71 and 72 with regardtothe revolving table is best shown in the to'pyiew of Fig. 16. Y

In the straight line guide 71 the punched band 13 runs' from the left to the right in Fig. 10, and in the straight line guide 72 the punched band 14 moves from theright to the left in Fig. 13. In bearings 72a of the machine frame 22 a rod 73 is mounted to move to and fro (Figs. 16 and 17). Between the bearings 72a this rod has a guide 124 cooperating with a sliding block 74 described later for the purpose of driving the rod 73. An arm 75 is fixed toth e left hand end of the rod 73 and on this arm a conveying finger 76 is rockingly mounted. This finger enters the straight line guide 71 under the effect "of its weight. Finger 76 serves the purpose of engaging the holes 42 for advancing the band 13. As an exact position of the finger 76 with regard to the longitudinal direction of the straight line guide 71 is of great importance, the arm 75 after having loosened the adjusting screw 77 can be coarsely adjusted along the rod 73, while for a fine adjustment of the finger 76 the latter is mounted on the arm 75 by means of an adjustable eccentric 78. The right hand end of the rod 73 carries an arm 79 which can likewise be adjusted along the rod 73 after having loosened an adjusting screw 77. A conveying finger 80 is rockingly mounted on the free end of the arm 79. This finger, under the effect of its weight, enters the straight line guide 72 and serves the purpose of engaging the cut outs 45 of the band 13 in order to advance this band by a desired distance towards the revolving table 18. This finger 80 is rockingly mounted on the arm 79 by means of an eccentric 81 for the purpose of finely adjusting its position with regard to the longitudinal direction of the straight line guide 72.

When the rod 73 is moved from left to right in Fig. 16, the finger 76 engages a hole 42 of the band 13 and advances the latter while the finger 8 0 slides or trails along the band 14. On a movement of the rod 73 from right to left in Fig. 16, the finger 80 engages cut-outs 45 of the band 14 and advances the latter while the finger 76 slides or trails along the band 13.

In order to prevent backward movement of the band material on return movement of the

fingers

76 and 80 under the elfect of friction, the following locking fingers are provided:

A locking finger 84 is fixed to a bearing piece 82 of the straight line guide 71 by means of a screw 83. This finger 84 has front corners to engage the cut-outs 43 of the band 13 as soon as the finger 76 has advanced the band by the desired distance. Thus, on a return movement of the finger 76 these corners of the finger 84 prevent backward movement of the band 13. In order to allow an exact adjustment of the locking finger 84 with regard to the longitudinal direction of the straight line guide 71, the screw 83 enters a slot 85 of the locking finger 84 and carries on its free end a washer 86 by means of which the locking finger 84 is clamped fast on the bearing piece on the screw 83 being tightened. By loosening the screw 83 the locking finger 84 may be displaced in the longitudinal direction of the straight line guide 71 until it is in its correct position.

A corresponding locking finger 87 is also provided for the straight line guide 72 behind the advance finger 80. This finger 87 is loosely mounted on an arm 89 by means of a fine adjusting eccentric 88. This arm 89, after the adjusting screw 90 has been loosened, can be moved along the rod 91 for coarse adjustment of the finger 87. The rod 91 serves also as a guide for the arm 79 and is fixed to astationary part of the machine.

The locking finger 87 bearing against the band 14 under the effect of its weight has front corners engaging the cut-outs '45 as soon as the advance finger 80 has completed its advance movement. Therefore, on a return movement of the advance finger 80 the locking finger 87 prevents an undesired backward movement of the band 14.

The edge 92 of the straight line guide 71 serves as a cutting edge to cooperate with a cutting tool, described later. The edge 93 of the straight line guide 72 is likewise shaped as a cutting edge to cooperate with another cutting tool also, described later.

The arrangement and the design of the revolving table are best seen in Figs. 21 and 22. In Fig. 21, an axle 94 is inserted into the machine frame 22 and has a flange 95 supported on a shoulder 96 of the machine frame. A nut 97 screwed to the lower end of the axle 94 presses the flange 95 against the shoulder 96, so that the axle 94 is in rigid connection with the machine frame 22. A bushing 98 with a conical outer surface is mounted on the portion of the axle 94 lying above the flange 95 and is locked against the rotation by means of the locking member 99'. A sleeve 100 with a conical inner surface is rotatably mounted on the bushing 98 and is force.- fitted in the body 101 of the revolving table. The lower portion of this body 101 comprises a toothed rim 102 engaging a gear wheel of a toothed wheel gearing described later on. The plate 18 of the revolving table is fixed to the body 101 by means of screws 103. This plate 18 has eight dies 104 (Fig. 22). These dies correspond to the shape of the casings 1 of the packings to be made (Figs. 43 and 44). The revolving table 18, 101 has four upper stop pins 112 fixed to the plate 18. To the body 101 lower stop pins 113 are fixed at spots displaced by 45 with regard to the pins 112. The stop pins 112 and 113 are to engage a key bit of a stopping device described later on. A nut 114 is screwed to the upper end of the axle 94 and a washer 115 is provided between this nut and the bushing 98. A lever 117 hav ing a peak 116 is swingingly mounted on the nut 114. This lever serves the purpose of holding down the material for the packing covers pushed onto the table 18. The axle 94 has a central bore 118 leading from the cylinder 119 of an air pump upwardly to a cap 120 mounted on the upper end of the axle 94. The air escapes through

openings

121 and 122 and serves the purpose of ejecting the completed packings. The air delivery will be described later on.

The gear pump forming the liquid coupling may now be described with reference to Figs. 18 to 20.

A sleeve 123 is rotatably mounted on the machine frame 22. On the upper end of this sleeve a sliding block 74 is mounted loosely rotatably on and eccentrically to the axis of the sleeve 123. The sliding block 74 engages the guide 124 of the rod 73 described above (Figs. 16 and 17). The shaft 126 of the gear pump is rigidly connected with the sleeve 123 by means of a transverse pin 125. The sleeve 123 has an external toothing 127 coopcrating with the toothed rim 1.02 of the above described table 18, 101 through the intermediate gear wheel 128 mounted on the machine frame 22. The central wheel 130 of the gear pump is rigidly coupled with the shaft 126 by means of a wedge 129. The chain wheel 131 is fixed to a sleeve 132 which is loosely carried on the shaft 126. The sleeve 132 together with the chain wheel 131 rotate on the balls 133 of a ball bearing, the casing 134 of which is fixed to the machine frame 22 by means of screws 135. The casing .136 of the gear pump is rigidly connected with the sleeve 132. This casing 136 lies in a reservoir 138 of the machine frame 22 filled with oil 137. The three outer gear wheels 139 (-Fig. l9) engaging the central wheel 130 are pivoted on the casing 136 and, as shown in Fig. 19, v

are displaced by 120 from one another. In Fig. 19, bores 140, through which oil from the reservoir 138 is sucked in to the place of contact between the wheels 1311 and 139, are indicated in dotted lines. Ball valves are provided in the discharge conduits 141 through which the oil can return from the places of contact to the reservoir 138. As shown in Fig. 18 these valves have balls 142 which are pressed against sleeves 144 by means of a spring 143. The chain wheel 131 is in connection with the chain wheel 22 of Fig. 1 by the intermediary of the chain 315 (Fig. 3). Therefore, the sleeve 132 and the gear casing- 136 are continuously drive by the central motor 19.

The manner of operation of the above described gear pump is as follows:

Assuming that the revolving table is locked. In this case, the sleeve 123 with the shaft 126 and the central wheel 130 cannot rotate. Therefore, on rotation of the chain Wheel 131 that is on rotation of the gear casing 136 and on rotation of the wheels 139 around the central wheel 130 which. is at rest, the pressure of the oil between the gear wheels is increased in to the extent that the pressure of the springs 143 is overcome so that the balls 142 are lifted from the bottom to the top in Fig. 18 and the ner described later on, the oil pressure between the wheels,

139 and will rotatethe central wheel 130 and With it the casing; 1 36and the shaft 126,. When the table 1.3,,

101 is aca-iulocks he o l wi l l t th ball .2 a a o e. described. Therefore, while the chain wheel 131 and the cas 1 6cm continu us y turning. the entr l hel1 0 with the shaft 1 26'can only rotate when the table 18, 10.1 is unlocked.

The disk-shaped upper portion of the sleeve 123 which carries the slide block 74 has a notch 145 in reach of this block which is to engage a lever 147, pivoted on a pin 146, once per each revolution of the sleeve 123. A lever 148 is fixed to the pin 146, a spring 149 engaging the free end of this lever and a stationary part of the machine. Whenthe notch. 145 is inreach ofthe free end of the lever 147 (Fig. 20), this free end engages the notch145 under the constraint of the spring 149.

The toothing 127 .of the sleeve 123 engages an intermediate wheel 15!) pivoted on the machine frame 22 and this intermediate wheel is in mesh with a toothed wheel 151 of an outer sleeve 152 rotatably mounted on the machine frame. As shown in Fig. 18, the lower end of a torsion spring 153 is attached to the outer sleeve 152 while its upper end is anchored on a portion 154 of an inner sleeve 164 rotatable with regard to the outer sleeve 152.. The inner sleeve 164 comprises two cams 155, only one of thesecams cooperating with a follower 156 at every revolution of the sleeve .123. The inner sleeve 164 furthermore has two stops 163 only one of these stops striking against the lever 148 on each revolution of the sleeve, 123. The follower 156 is provided on the free end of an arm 157 which is fixed to a shaft 158 (Fig. 20). This Shaft is rotatabiy mounted on a bearing 158 of a support 159 fixed to the machine frame and carries on its other end an arm 160 to which a connecting rod 161 is linked. This rod is mounted in a vertical bearing 162 of the machine frame 22 to move upwardly and downwardly. The lower end of the rod 161 is shown in Fig. 26 and is linked to an angle piece 165, the purpose of. which will be described later on in connection with the press comprising the cutting, drawing and closing tools. The rod 161 is operated by the gear pump of Figs. 18 to 20 as follows: When, after having unlocked the revolving table 18, 101, thesleeve 123 begins to turn out of its position of Fig. 20 in the anticlockwise direction, the lever 147 is lifted out of the notch 1 45 and is swung in the clockwise direction together with the lever 143 and against the constraint of the spring 149. In this. way, the free end of the lever 148 comes into reach of one of the stops 163 so that theinner sleeve 164 is locked against rotation. Therefore, the upper end of the spring 153 cannot rotate. This lasts until the sleeve 123 has made an entire revolution, so that the lever 147 can again engage the notch 145. this whole revolution of the sleeve 123 the table 18, 101 has been moved through the angle betweentwo adjacent dies 104. During this revolution of the sleeve 123, the outer sleeve 152 has been turned by means of the gearing 127,150 and 15.1. Together with the sleeve 152, the lower end of the spring 153 has been rotated, so that during the revolution of the sleeve 123 the torsion spring 153 has become tightened. At the moment of. completion of the tablev movement, when the lever 147 engages the notch 145, so that the stop 163, which up till now was in coop-v eration with the lever 148, is released (Fig. 20), the inner sleeve 164 is turned under the constraint of the tightened spring 153 while the outer sleeve 152 is at rest. The follower 156 ascends on one of the cams so that the arm 157 with its free end in Fig. 20 is moved upwardly, while the free end of the arm and with it the rod 161 and theangle piece 165 (Fig. 26) are-moved downwardly.

The press 7 and its drive may now bedescribed as fol, lows, reference'being had to Figs. 26 to 33. The block or support 166 of the press carrying the upper cutting,

drawing and closing tools described later on, is fixed to.

During V