US3525519A - Structure to be used in printing machines and the like for laterally adjusting sheets - Google Patents

Description

Aug. 25, 1970 J. JIRUSE 3,525,519

STRUCTURE TO BE USED IN PRINTING MACHINES AND THE LIKE FOR LATERALLY ADJUSTING SHEETS Filed Sept. 27, 1968 5 Sheets-Sheet l INVENTOR Bras/m)" 7/7052 I Q f Aug. 25; 1970 JlRUSE 3,525,519

STRUCTURE TO BE USED IN PRINTING MACHINES AND THE LIKE FOR LATERALLY ADJUSTING SHEETS Filed Sept. 27, 1968 3 Sheets-Sheet 2 FMPiT k a; 66 O 6 a m m w n. M

0 m L arm 1 5 2/\ r! n 0 6 R W fi T a a m: a m f Aug. 25, 1970 J. JIRUSE 3,525,519

STRUCTURE TO BE USED IN PRINTING MACHINES AND THE LIKE FOR LATERALLY ADJUSTING SHEETS Filed Sept. 27, 1968 3 Sheets-Sheet 5 1 i /0 I i r. 66 L1 2 3/ 1 C 42 l i "l n 29 N 33 a5 26 INVENTOR farm /a u l fn/je Int. Cl. B65h 9/10 US. Cl. 271-59 10 Claims ABSTRACT OF THE DISCLOSURE In a device for laterally adjusting sheets in a machine, such as a printing press, an elongated support shaft of the machine is supported for swinging movement about its axis. This shaft carries a lifting fork which coacts with a swingable body which is freely swingable on a support shaft and which is urged downwardly by a spring between the lifting fork and the swingable body. This latter body carries a roller which is resiliently pressed by this spring against the upper surface of a sheet-conveying table, and flush with this table is a shifting bar to engage a sheet and shift the latter into engagement with a stop member which is carried by the swingable body. A pressure roller which is carried by the swingable body coacts with the upper surface of the shifting bar to press against a sheet which is displaced into engagement with the stop member upon longitudinal shifting of the shifting bar. A single drive shaft of the machine coacts on the one hand with the shifting bar, through a suitable shifting means, for axially shifting the shifting bar and on the other hand with the swingable support shaft for angularly turning the latter.

BACKGROUND OF THE INVENTION The present invention relates to sheet-handling machines, such as printing machines.

In particular, the invention relates to structures for laterally adjusting sheets.

In the case of printing machines, paper sheets or the like are fed during the printing operations so as to advance one behind the oher, or the sheets may partly overlap each other as they are fed along a suitable conveying table. With such constructions it is necessary to provide an adjusting device which determines the precision with which the printing elements register with printing on the sheets, especially in those cases where each sheet must pass repeatedly through the printing press. In order to adjust the sheets laterally they are conventionally displaced into engagement with a fixed stop so that in this way each sheet .will assume its proper position when next passing through the machine.

Known devices for laterally adjusting sheets in this manner are provided with fixed lateral stops. For example, a displaceable pad coacts with a gripper and pushes the sheets into engagement with the lateral stop. The respective device is adjusted in such a way as to be adapted to the particular size of the sheet. A rod or a slide as well as drives for the movement of the pad and for the opening of the gripper are required.

One of the drawbacks of devices of this type is that the lateral stop cannot be lifted, and difiiculties are encountered when the sheets are cut obliquely, which is to say when they are not squarely cut, or when the front stops are displaced in such a way that they do not form a precise right angle with the side stop.

Other devices with movable side stops have, therefore, been provided. After a sheet is laterally adjusted, the side stop is lifted and the end of the sheet, even if it is not precisely square and is, instead, somewhat oblique, can

United States Patent 3,525,519 Patented Aug. 25, 1970 pass freely beneath the stop. In addition to the drives and guides for displacing the pad and opening the gripper there must in such a case also be a drive for lifting the side or lateral stop.

Other devices for lateral adjustment of sheets use shiftable bars instead of shiftable pads. In some cases there are a pair of such bars which move in opposite directions so as to enable adjustments to be made in either one of a pair of opposed lateral directions. With such a construction the grippers are replaced by rollers which are designed to press the sheet against the shiftable bar and thus bring about pushing of the sheet toward a lateral stop.

Structures of the latter type are extremely complex. With all of the structures mentioned above it is essential to provide individual drives for the various components. These drives and the transmissions therefor are situated beneath the conveying table. A pair of drive shafts are provided and designed in such a manner as to give predetermined positions to the mechanisms. All of these structures are complicated and do not provide the required operations in the best possible manner while, in addition, requiring exceedingly expensive machining.

There are other known devices for bringing about the lateral adjustment of sheets, using the same principles, but having their drives and the position of their components determined by a single shaft. In these constructions, the lateral stop is tiltable about the center of the driving shaft and presses against the conveying table when in its working position. The path of the pressing roller which engages the sheet extends along a radius about the center of the drive shaft, but in the critical position when pressing down on the paper sheet the path of the roller extends at right angles to the conveying table, this result being brought about by the lateral stop which bears directly against the conveying table and prevents further angular displacement of the entire mechanism of the shaft.

A structure of this latter type simplifies other known structures, but the .tiltability of the lateral stop is a highly disadvantageous feature inasmuch as the stop sometimes lifts the paper and damages the edges thereof. Moreover, the lateral stop strikes during operation against the table at each stroke and damages the table. The quality of the printing operations are undesirably influenced by these impacts, especially at high operating speeds.

SUMMARY OF THE INVENTION It is accordingly a primary object of the present invention to provide a construction which will avoid the above referred to drawbacks.

In particular, it is an object of the invention to provide a relatively simple reliably operating structure driven from a single drive shaft and capable of accurately adjusting the individual paper sheets.

Another object of this invention is to provide a lateral stop member which will coact with the conveying table in such a way as to prevent even relatively thin sheets from becoming situated between the lateral stop and the table. On the other hand, it is an object of the invention to provide a lateral stop which has a dimension sutliciently great longitudinally of the sheet to prevent the edge of the sheet from being deformed.

Also, it is an object of the invention to provide a structure which will reliably prevent a sheet from being lifted from the conveying table when the lateral stop is lifted therefrom. Thus, the edges of the paper cannot be undesirably bent at the place where it contacts the stop.

Further, it is an object of the present invention to provide a construction which is capable of adjusting the gap between the conveying table and a guide situated thereover, in accordance with the thickness of the paper, so that buckling of the paper, particularly along an edge 3 thereof will not occur when the paper engages the lateral stop member.

In accordance with the invention, there is located on a suitable support shaft which is supported for swinging movement about its axis a lifting fork and a swingable body that is freely swingable on the shaft and is lifted and lowered in response to turning of the lifting fork with the support shaft. This swingable body carries a roller which presses resiliently on the conveying table. An elongated shifting bar has an upper surface flush with the upper surface of the conveying table, and by way of a spring-loaded bayonet joint and a carrier fork the shifting bar engages a pin of a swingable fork so that through a transmission from a single drive shaft it is possible to reciprocate the shifting bar. The swingable body carries a stripper and is formed with a bore accom modating a spring which loads a carrier for a pressure roller that is pressed down against the shifting bar. This roller extends through an opening of a guide member 'which is adjustably carried by the swingable body. The swingable body also carries the lateral stop on one side by means of a pin which also carries the adjustable structure for adjusting the guide member. The support shaft is urged by a spring into axial engagement with an end of an adjusting screw so that by turning the latter the axial position of the shaft and the structure carried thereby can be adjusted.

With this construction it is possible. to adjust individual paper sheets most accurately. The lateral stop member which is carried by the swingable body has a lower edge portion extending into a groove of the conveyor table so as to prevent even relatively thin sheets from becoming wedged between the lateral stop member and the conveying table. The lateral stop member is sufficiently wide to prevent any undesirable deformation of the edge of the paper. When the stop is lifted with the swingable body by the lifting fork on the support shaft, the sheet is prevented, by the stripper which is carried by the swingable body, from being lifted along with the stop member, so that the edges of the paper are prevented from becoming bent at the location of contact with the stop member. Inasmuch as the gap between the conveying table and the guide member can be adjusted in accordance with the thickness of the sheet of paper, there can be no buckling of the paper particularly at the edge thereof When it engages the lateral stop member.

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated by way of example in the accompanying drawings which form part of this application and in which:

FIG. 1 is a schematic side elevation of the machine as seen from the right side of FIG. 2;

FIG. 2 is a top plan view sectionally illustrating the structure of FIG. 1;

FIG. 3 is a section taken in the plane of the line III-III of FIG. 2;

FIG. 4 is a section taken in the plane of the line IVIV of FIG. 2:

FIG. 5 is a transverse section taken in the plane of the line V-V of FIG. 2; and

FIG. 6 is a view of the structure of FIG. 4 as seen from the left side thereof.

DESCRIPTION OF A PREFERRED EMBODIMENT Referring now to the drawings, there is shown in FIG. 2 an elongated support shaft 10 supported not only for swinging movement about its axis but also for axial movement. An elongated compression spring 13 is coiled about the shaft 10, in the region of the left end thereof, and engages a split ring or the like carried by the shaft 10 to urge the latter to the right, as viewed in FIG. 2. The left end of the shaft 10 is supported in a stationary bearing sleeve 11 which. is carried by the machine frame 12. The opposite end of the shaft 10 is axially displaceable within a bushing 14 which is itself turnable in a bearing 15 of the machine frame. A key 16 that is fixed to the bushing 14 extends into an elongated axial groove of the shaft 10 so that the latter is shiftable axially with respect to the bushing or sleeve 14 while at the same time being con strained to turn with the sleeve 14. A lever 17 fixedly sur rounds the sleeve 14 and is connected through a ball joint with an elongated rod 18 which in turn is connected over a ball joint to a two-armed lever 19 (see also FIG. 3). The latter is supported for swinging movement on a stationary pin 20 which is actuated by a rotary cam 21 that is fixed to the single drive shaft S of the machine for rotation therewith. The angular position of the cam 21 can be adjusted by the structure shown in FIG. 3. The lever 19 carries a follower roller 22 which engages the periphery of the cam 21. A spring 23 is connected at one end to a stationary pin 84 carried by the machine frame 12, and at its other end to a pin 84a carried by the lever 19 so as to maintain the roller 22 in engagement with the cam 21.

The shaft 10 carries a lifting fork 25. A pair of such lifting forks are indicated in FIG. 2 so that one lifting fork is used for adjusting a sheet in one lateral direction while the other is used when a sheet is to be adjusted in the opposite lateral direction. The lifting forks 25 are axially shiftable along the support shaft 10. Each lifting fork 25 is of substantially U-shaped configuration and has its opposed arms formed with openings through which the shaft 10 extends. Within the enclosure formed by the shaft 10 and the U-shaped lifting forks 25 there is a swigable body 24 surrounded by each lifting fork 25 (see FIG. 4). As is apparent from FIG. 4, the shaft 10 is formed with an elongated axially extending V-shaped groove which receives a fixing member 26 that is capable of being pressed into the groove by a manually tunable screw carried by one of the arms of each lifting fork 25, so that through this structure it is possible to adjustably fix each lifting fork on the shaft 10. Of course, this will also determine the position of the body 24 which is freely swingable on the shaft 10.

As may be seen from FIG. 5, a spring is accommodated in a bore in the lifting fork 25 and presses downwardly against the swingable body 24 to urge the latter in a clockwise direction about the shaft 10, as viewed in FIG. 5. Each swingable body 24 carries a roller 29 which is urged by the spring 85 against the upper surface of a sheet-conveying table 28, Each roller 29 is supported for rotary movement on a pin 30 which is eccentrically positioned with respect to the body 24 by means of an elongated member 31 fixed directly to the body 24 and having at its free end the pin 30, most clearly shown in FIG. 6.

The swingable body 24 "is formed in its interior with a bore which has an open bottom end to accommodate in the interior an axially shiftable carrier member 32 the lower end of which supports for rotary movement, on a pin 35, a pressure roller 33. The latter is supported for free rotary movement by ball bearings 34 carried by the pin 35. A pair of springs 36 and 37 are situated within the bore of the swingable body 24 and are acted upon by an adjusting screw 38 whose position can be fixed by a suitable lock nut 39 so that in this way the force with which the pressure roller 33 is urged downwardly can be adjusted.

The swingable body carries a pair of transversely extending pins 40 which extend through and beyond the swingable body. As may be seen from FIG. 5, the pins 40 actually pass through the body 32 which carries the pres sure roller 33 and then pass through cutouts formed in the swingable body 24 as well as into and through suitable cutouts formed in the arms of the lifting forks 25. These cutouts are shown in dotted lines in FIG. 5. As a result, when the lifting fork 25 turns with the shaft 10 in a counterclockwise direction, as viewed in FIG. 5, the lower edges of these cutouts will engage the pin 40 which is at the upper location in FIG. 5 so as to raise the pin 40 and thus raise the entire body 24 in all of the structure carried thereby upwardly away from the conveying table 28. On the other hand, when the lifting fork 25 is displaced to the position shown in FIG. 5, the lower edge portion of the openings which engage the upper pin 40 will be displaced slightly below the pin 40 in the upper position of FIG. to provide clearance 90 indicated in FIG. 5. At the same time the lower pin 40 also has a predetermined clearance with respect to the lifting fork, so that in this way the pressure of the roller 29 is determined by the spring 85, and the pressure of the roller 33 is determined by the springs 36 and 37 inasmuch as in this operating position there is no direct connection between the lifting fork 25 and the body 24 except through the spring 85.

The pins 40 serve to mount on one side of the body 24 the lateral stop member 41, while on the other side of the body 24 the pins 40 serve to hold a guide holder 42 shown in FIG. 4. This guide holder 42 supports through an adjusting mechanism a displaceable guide member 43 which is situated over the upper surface of the conveying table 28 and is formed with an opening through which the pressure roller 33 freely extends. The adjusting mechanism is capable of adjusting the guide member 43 so that its distance from the upper surface of the table 2-8 corresponds to the sheet thickness. For the purpose of adjusting the guide member 43, the latter is fixed to an upwardly extending screw threaded into an adjusting nut 44 (FIG. 4). A detent structure is formed by depressions in the nut 44 capable of being selectively engaged by a detent ball 45 urged toward the nut 44 by a spring 46. A spring 87 is coiled about a threaded rod which is fixed to and extends upwardly from the guide 43 so as to urge the latter downwardly as viewed in FIG. 4. By adjusting the nut 44 it is possible to adjust the elevation of the guide 43 with respect to the conveying table 28.

The body 24 also carries at its left end surface, as seen in FIG. 4, a stripper member 86. The lower free end of this stripper member coacts with a sheet on the table 28 to prevent the sheet from being lifted when the stop member 41 is lifted during upward swinging of the lifting fork 25.

Each lifting fork 25 and, of course, the swingable body 24 therewith can be coarsely adjusted on the shaft 10, axially thereof by way of the key 26 and manually turnable screw 27. However, for the purpose of a fine adjustment, the frame 12 carries, as shown at the lower right portion of FIG. 2, a sleeve 47 which is provided with an internal thread. The sleeve 47 threadedly carries an ad justing screw 48 capable of being turned by the knob K shown at the lower right portion of FIG. 2. This adjusting screw 48 carries at its left end, as viewed in FIG. 2, a ball member 50 against which the right end of the shaft is resiliently pressed by the spring 13. A resilient sleeve 49 made of a suitable rubber or other springy elastic material frictionally surrounds and is carried by the sleeve 47 and frictionally engages the screw 48 which extends through an opening at the right end of the resilient sleeve or brake 49, so that through this member 49 the adjusting screw 48 will be maintained in its adjusted angular position. As a result of this construction, it is possible to provide an extremely fine axial adjustment of the shaft 10 and the structure carried thereby, even during operation of the machine. The table 28 is omitted from FIG. 2 for sake of clarity.

An elongated shifting bar 60' has an upper fiat surface which is flush with the upper flat surface of the table 28 and which is situated in an elongated slot 28' formed in the table 28 (see FIGS. 3-5). In the region at its left end (FIG. 2), the elongated shifting bar 60 has a cylindrical portion supported by ball bearings 62 in a sleeve 63 which is carried by the machine frame 12, so that the shifting bar 60 is supported for axial shifting movement. The opposite end of the shifting bar 60- carries a laterally extending pin 64 and bears at its extremity against the left end of a compression spring 68. An elongated sleeve 67 is slipped onto the right end of the bar '60, as seen in FIG. 2. The sleeve 67 is formed with a bayonet notch, such as a notch of L-shaped configuration, which receives the pin 64 so that the sleeve 67 is releasably fixed to the bar 60. The spring 68 serves to maintain the bayonet connection between the pin 64 and the sleeve 67. The sleeve 67 carries at its free right end, again seen in FIG. 2, a non-circular extension 69 which may be, for instance, of square cross section, so that it is possible to turn the sleeve 67 by means of a suitable wrench and to disconnect it from the bar 60 at the bayonet connection. Then, the sleeve 67 can be replaced through another bayonet slot on the bar 60 in a position angularly displaced by 180 from the position shown in FIG. 2 for a purpose described below. The sleeve 67 carries a fork 70 which receives a pin 71 of a fork member 72 which is swingable about a substantially upright axis in a bearing of a suitable bracket 73- shown most clearly in FIG. 1 and carried by the frame 12.

This swingable fork 72 carries an extension 74 which is connected through a ball joint 75 with an elongated rod or link 76 which in turn is connected through a second ball joint 77 with a bell crank 78 supported for swinging movement on a stationary pin 79 carried by the machine frame 12. The bell crank 78 carries at its end remote from the rod 76 a cam follower roller 81 which engages the camming periphery of a cam '80 capable of being adjustably mounted on and driven by the single drive shaft of the machine by the adjusting structure shown in FIG. 1. Thus, the drive shaft which is sectionally illustrated at the lower right portion of FIG. 3 is also operatively connected with the cam to rotate the latter simultaneously with the cam 21.

The structure described above operates as follows:

The axial displacement of the shifting bar 60 is brought about by swinging the swingable fork 72, the angular dis placement of which is brought about by the link 7-6 and the bell crank 78 in coaction with the cam 80'. The latter train of elements forms a transmission providing the structure with a shifting means driven by the single drive shaft to axially shift the shifting bar 60. With the structure illustrated, the bar 60 will be shifted in one direction so as to shift a sheet against one of the stop members 41. By way of the removal of the sleeve 67 at its bayonet connection, the fork 70 can be displaced through from its position shown in FIG. 1 so that it will coact with the other pin 71 of the swingable fork 72, and in this way the shifting means will coact with the bar 60 to shift the latter in an opposite direction when it is desired to laterally adjust a sheet with respect to the stop member 41 carried by the other body 24 of the other lifting fork 25. The structure ST in FIG. 1 represents the manually operable axially adjusting means 47-50 described above with respect toFIG. 2. It will be noted that the pin 64 carries on a suitable ball bearing a roller 65 guided in a stationary guide member 66, the elements 65 and 66 being shown in the lower right portion of FIG. 2 as well on the left side of FIG. 1.

Simultaneously with the actuation of the shifting bar 60 by means of the shifting means just described, the turning means formed by the cam 21 together with the lever 19 and the transmission from the latter to the lever 17 serves to swing the shaft 10 about its axis, thus providing from the same drive shaft a means for rotating the shaft 10 about its axis in timed relation with the shifting of the bar 60 by proper adjustment of the cams 21 and 80 with respect to each other about their common axis. The swinging of the shaft 10 will result in turning of the lifting fork 25 downwardly therewith, and the displaceable member 32 within the swingable body 24 is acted upon by the springs 36 and 37 so that the roller 33 extends through the opening of the guide member 43 to press against the upper surface of the shifting bar 60.

The paper is thus pressed at its upper surface against the roller 33 and at its lower surface against the bar 60 so that when the latter shifts the paper will be laterally moved into engagement with the lateral stop member 41. When the paper engages the stop member 41 it stops moving but the bar 60 can continue to slide beneath the paper. this possibility is brought about by very precisely regulating the pressure of the roller 33 through the spring 36 and 37 by way of the adjusting screw 38. As was pointed out hereinbefore, when the roller 33 presses against the paper the clearance 90 is provided. The stripper 86 on the swingable body 24 provides together with the upper surface of the table 28 a gap through which the paper sheets can freely pass. When the lateral stop 41 is lifted, the sheet is retained by the lower surface of the stripper 86 so that the sheet cannot move up with the stop member.

Once the paper sheet is adjusted it is advanced by a nonillustrated drive toward the location where the printing operations take place. The shifting bar 60 returns to its initial position. A new sheet is supplied and the above cycle is repeated.

The adjusting screw 48, referred to above, enables the axial position of the entire shaft to be very precisely adjusted, even during the operation of the machine, so that the lateral movement of a sheet can also be precisely adjusted. When the size of the paper sheets is changed, then a coarse adjustment can be brought about by way of the screw 27, as has been pointed out, and then the fine adjustment can be provided by way of the screw 48.

FIG. 1 shows in dotted lines, and FIG. 3 in relatively thin lines, the cylinders of the printing press which is of the offset type. As is indicated by the double-headed arrow for the lower cylinder, shown in dotted lines in FIG. 1 and in a thin full line in FIG. 3, the swingable gripper carries out a rotary reciprocating motion, and the circle with the double-headed arrow represents the mechanism of the rotary swing-grippers. FIG. 1 shows in a straight dotted line T extending tangentially from the bottom of the swingable gripping assembly the location of the transporting or conveying table 28. The device D shown in dotted lines at the lower part of the lower dotted circle in FIG. 1 shows the position of the front mark of the gripping mechanism of the rotary swing gripper.

As was pointed out, each of the lateral stops 41 extends into a groove of the conveying table 28. Thus, the table 28 is formed with an axially extending groove of sufficient width to receive freely the lower end of the stop member 41. In this way, any impact between the stop member and the conveying table 28 is avoided while at the same time the stop member 41 extends to an elevation low enough to reliably engage each sheet at its side edge without permitting the sheet to become wedged between the bottom edge of the stop 41 and the table 28. During each revolution when a cycle takes place the lateral stops 41 are raised out of the groove of the table 28, as soon as the follower roller 22 is engaged by the part of the cam 21 which is situated at the greatest radial distance from the drive shaft.

It is to be noted that the pin 30 which carries the roller 29 is an eccentric pin that can be angularly adjusted so as to provide through the member 41 an adjustment of the body 24 to reliably seat the roller 33 across its entire width on the shifting bar 60.

When relatively light paper is printed, the spring 37 only will be provided within the body 24 to urge the roller downwardly. Both of the springs 36 and 37 are used when the printing of heavier paper requires a larger force at the roller 33. Of course, when the lifting fork turns upwardly the clearance 90 is eliminated, and through the pin 40 the entire body 24 is raised with the lifting fork 25. Since the lateral stop 41 is fixed by the pin 40 to the body 24, this lateral stop 41 will also be raised out of the groove of the table 28.

I claim:

1. In a machine for handling sheets, such as a printing machine, an elongated support shaft, support means supporting said shaft for rotary movement, a lifting fork carried by said support shaft for swinging movement when the latter turns, a swingable body freely swingable on said support shaft and coacting with said lifting fork to be raised by the latter when said support shaft turns in one direction, said swingable body being lowered when said shaft turns in an opposite direction, spring means between said lifting fork and swingable body for urging the latter in a given direction with respect to said lifting fork, a sheet-conveying table situated beneath said support shaft and swingable body, a roller turnably carried by said swingable body and urged by said spring means into engagement with said conveying table, a stop member carried by said swingable body for engaging a side edge of a sheet, a sheet-engaging shifting bar having an upper surface flush with an upper surface of said table which engages a sheet, a pressure roller carried by said swingable body for pressing a sheet against said shifting bar, shifting means coacting with said bar for shifting the latter parallel to said support shaft for displacing a sheet between said pressure roller and bar into engagement with said stop member, swinging means operatively connected to said support shaft for swinging the latter about its axis, and a single drive shaft operatively connected to said shifting means for actuating the latter to shift said bar and operatively connected to said swinging means for actuating the latter to swing said support shaft.

2. The combination of claim 1 and wherein said s'hifting means includes a cam-actuated transmission operatively connected to a swingable fork, and a fork member carried by said bar and engaging said swingable fork to be shifted when the latter swings.

3. The combination of claim 2 and wherein said fork of said bar is operatively connected to the latter through a spring-loaded bayonet joint.

4. The combination of claim 1 and wherein said swingable body carries a stripper plate situated over said conveying table, and said body being formed with a bore in which is located a carrier which supports and carries said pressure roller, a guide member carried by said swingable body over said conveying table and formed with an opening through which said pressure roller extends, and spring means in said bore of said body engaging said carrier to urge said pressure roller toward and into engagement with said shifting bar.

5. The combination of claim 4 and wherein a pin extends through and is carried by said swingable body, said pin carrying said stop member and also carrying a holder, and adjusting means carried by said holder and supporting said guide member for adjustable movement with respect to said conveying table.

6. The combination of claim 1 and wherein a rotary adjusting screw engages one end of said support shaft, said support means supporting the latter shaft not only for swinging movement about its axis but also for longitudinal adjusting movement, and a spring urging said shaft into engagement with said adjusting screw so that by turning the latter the axial position of said shaft and said lifting fork and swingable body carried thereby can be adjusted.

7. The combination of claim 2 and wherein a pair of cams are connected to said single drive shaft to be rotated thereby, a pair of cam-follower levers supported for swinging movement and engaging said pair of cams, and a pair of transmissions extending between the latter levers and said swingable support shaft on the one hand and said swingable fork, on the other hand.

8. The combination of claim 1 and wherein said conveying table is formed with a longitudinal slot extending parallel to said swingable shaft, and said shifting bar extending through said slot of said table and having an upper surface flush with the upper surface of said table.

9. The combination of claim 1 and wherein said table axially, to precisely determine the position of said swing is formed with a groove which receives a lower end of able y along the axis of Said PP Shaftsaid stop member, the latter being lifted out of said R f Ct d groove upon lifting of said swingable body by said lifte erences l e ing fork when the latter turns with said support shaft. 5 UNITED S S PATENTS 10. The combination of claim 1 and wherein a coarse 2 730 3 2 1 195 h 71 adjusting means adjustably fixes said lifting fork to said 2,953,372 9/ 1960 Williams et al 27'1-52 support shaft so as to also determine the location of said swingable body, and wherein a fine adjusting means co- ROBERT SHERIDAN, Pnmafy Examlner acts with said support shaft for finely adjusting the latter 10 R J. $PAR Assistant Examiner

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