DE1536966A1 - Machine for continuous printing of two surfaces of an oval object - Google Patents

Description

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MARv: "'Γ'SEIDLER

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Widcnmaysrstrasse 23

Telephone (03 11) 29 7194

April i3, 367 Louis Gilbert DUBUIT

60, rue Vitruve, Paris 2Oe

"MACHINE FOR CONTINUOUS PRINTING OF TWO SURFACES OF AN OVAL OBJECT"

The invention relates to machines that allow continuous printing on both surfaces of an object of oval cross-section, and especially on machines using the so-called screen printing process.

Such machines, and for example those of the type described in French Patent No. 1,402,929, filed April 14, ^1964s , generally comprise two printing stations and a transport device between the two printing stations for transporting an object from a printing station on the other hand, each printing station has a printing device and a rotating device at the same height, which grasp an object and insert it into it without sliding

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Stand.

May bring contact with the printing device while said transport device from a first position in which it grips an object that of of the rotating device belonging to the first printing station after printing on one of the surfaces of the mentioned object, can move into a second position in which the transport device brings the object onto the rotating device that belongs to the second station for printing the other of the surfaces of the said counterpart

It is a general object of the present invention to to make various improvements to the machines of this type, with the particular purpose of improving their operational safety to improve and increase their speed of work.

According to one of the improvements according to the invention, and after it is printing stations that after the Screen printing processes work, and each has a horizontally movable slide, a silk stencil and a doctor blade have, which is carried by said carriage, and which are vertically movable with respect to this, in combination with a rotating device, which consists of a lower part and a gripping tip, which point in the direction of the lower part is movable around an object to be printed

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to press against this, with the said lower part and the tip in synchronous rotation from a set of ensured, which uses a revolving cam, the profile of which is such that a certain holding time for said carriage at each of the outer positions of the horizontal displacement is determined.

According to the invention, an object is gripped during the corresponding holding time of the sled and accordingly takes place in a much more secure manner.

According to another of the improvements according to the invention, "the transfer device has a stroke" that is tan-gontial to the * Frad of an object !? lies, if this is taken by a be3-j "(; bi (-t.-;". 4er Γrei-vörrieht;: .-- ^r _ (> i. "., the" zu "ät-- Γr \ PtaUoi -t

BATH

This is how the takeover of an item takes place Rotating device of the second printing station after a movement that extends that of the transfer device, so that the latter can come back to the rear, i.e. towards the first printing station, as well as the object has been gripped by the rotating device belonging to the second printing station, without to be forced to wait that this rotating device has gone through a sufficient stroke to the object to free from the transmission device. In this way it is for the return of the transfer device The time required in its starting position is much shorter, and the working speed of the machine is much shorter is increased considerably.

According to a preferred embodiment, the transmission device a receiving fork for an object, which is carried at the end of a lever, one of the Forms sides of a deformable parallelogram, said lever alternately parallel to itself from a first position in which it is tangential to the path of an object on the rotating device that is to the first Printing station is heard, is brought into a second position, in which it is tangent to the path of the object on the rotating device which belongs to the second printing station.

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This particularly simple and robust embodiment proves to be very effective and allows the working speed of the machine to be increased by up to over 50%.

In order to avoid that during the transport of a object from one printing station to the other is ejected from the transport device, this is the latter according to a further improvement according to the invention provided with a suction nozzle, which is arranged in the cavity of the receiving fork and so designed is that it holds the item in place in that fork.

According to another of the improvements according to the invention, the lower part and the gripping tip of a rotary « device that belongs to a printing station, each wedged on an independent pinion, which has its own Gear rack engages, which is connected to the associated template in the sliding movement, while the rack belonging to the gripping point is slidably arranged in the longitudinal direction and at each of its ends has a roller with a flat part of the Template works together and perpendicular to the slide " tion of said rack is located.

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This device allows the grasping tip to be of one specific rack to be driven, which drives the associated lower part in spite of the vertical Movement of the stencils when they return to their rest position.

According to another of the improvements according to the invention is the presentation of the objects to be printed '' under the first printing station ensured by a transport chain with step-by-step feed that synchronously is moved with de stencil carrier carriage, while the objects after printing on their second surface from the rotating device belonging to the second printing station on a continuously running drying chain that is different from the aforementioned transport chain.

This arrangement makes it possible to feed the machine according to the invention at a speed which is high Working speed of this machine and also allows the objects, that have just been printed in a drying oven that is located behind the printing machine.

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Further features and advantages of the invention result can be derived from the following description of a shown in the accompanying schematic drawings EXAMPLE OF EXECUTION

Fig. 1 is a side view according to the invention, wherein Parts have broken away locally,

Fig. 2 is a plan view with certain parts broken away and individual elements removed;
and

Fig. 5 is a side view in the direction of arrow III of Fig. 2, with certain elements also being omitted.

According to the illustrated embodiment of the figures the improvements made according to the invention on a printing machine of the type as described in the above mentioned patent is described. The different elements of this machine are only briefly described below.

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Two parallel Lagerböcice 2 and 3 supported by a pedestal 1 are carried by two horizontal gylindri « see rods 4 and 5 connected * which are perpendicular to one another « who are arranged »

On the upper horizontal rod H- and at its ends see arms 6 $ 6 ^% ₃ turn the rod through a © - cylindrical rod

8 IBi te are connected to each other®

In the same way and w @ lsedreh © n sich.auf the ³ lower horizontal rod 5 two arms "J _s f \ which are arranged over the arms 6, 6 ⁵ .and by a ©" cylindrical rod

9 are connected, which is perpendicular to the bar 8 "

On the rods 8 and 9 slides in the longitudinal direction a screen holder clip C, which is formed from two vertical arms 10, 11, which are slidably fixed on the rods 8 and 9 and are connected by a horizontal rod 12. This rod cantilevered Ewei cross members 13s 14 _Λ which are connected by rods 15 * 16

connected and intended to cover the silk screen 17, j 1-8 to carry, the organs the Hiiupto ^ of the two pressure nations of the machine form ". The horizontal rod 12 carries on uev the fciueiijrMger-n 1 ^, 1 ^ · opposite side © inen bracket 19p ia which an ar-ra 20 engages «, d © i? fixed with a joint-opclneted Gabsl 21 on a slide 22

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is connected, while the carriage 22 in the longitudinal direction on the horizontal rod 5 is movable · This Schiit » ten 22 also carries a role 25, which is in a guide · » Slide 24, which is arranged in the base 1, rolls.

According to the present invention, the movement of the carriage 22 is controlled by a flat cam 55, which runs like a vertical disk, and is keyed for rotation with a drive shaft 56, which in turn carries a keyed pinion 57 via one Chain 58 runs, which is driven by a pinion 59 «. This pinion 59 is keyed to the output shaft 41 of a reduction gear 46, the input shaft 41 of which receives its movement from a motor 42 via a pulley transmission 45, 44 and a drive belt 45. The carriage 22 carries a vertical flat iron on which a push rod 25 is articulated, which is articulated itself at its other end on a lever 26 which is rotatably mounted at 27 on the base. The lever 26 has an elongated hole 28 engaged by a roller or finger 29 carried by a horizontal rod 50 which is slidably mounted at 5I and 52 in sleeves connected to the pedestals 2 and 5 of the base; this rod 50 also carries two rollers ~ ü>J> and 54 which are in contact with the raceway of the

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Cam j55 are in diametrically opposite positions to each other

In the following, the analog elements of the two printing stations of the machine have the same reference numerals and only differ from one another by an appended dash.

The carriage 22 carries a rack 47 which engages in two pinions 48, 48 * which are arranged at a distance from one another. The radii of these pinions are equal to the radii of curvature of the surfaces of the oval objects to be printed. These pinions 48, 48 * are keyed on shafts 49 and 49 ', at the other end of which the carrier parts 55, 55' are keyed, which belong to the two printing stations of the machine. In a manner known per se, the rotating devices belonging to these printing stations are supplemented by gripper tips 51, 51 *, which are carried at the end by arms 76, 76 ^1, which are wedged onto shafts 77, 77 'which are in the alignment of the shafts 49, 49 *, on which the carrier parts 55, 55 * are wedged. The shafts 77, 77 'are longitudinally slidably mounted in solid supports under the control of levers 52, 52' driven by pneumatic press pots 53, 53 '

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be operated. In addition, the shafts are 77, 77 * in the rotation with pinions 78, 78 'firmly connected, which in a rack 79 engage.

The levers 52, 52 *, which are rotatably mounted at a fixed point, each carry a stop which can actuate ^{a microswitch MS, MS 1.}

According to the invention, the rack 79 th LängsriGhtung slideably mounted in fixed bushings 80, 8o 'and carries at its ends rollers oil, 8-1 ^f, which cooperate with vertical flat iron Ö2, 82 *, integral with the ^ uer "" makers IJ and 14 are connected, which are carried by the horizontal rod 12 of the portafilter slide C.

The doctor blade 62, e> 2 ', that are associated with the two printing stations of the machine, assembled ^f on arms 6y / ö3, the fixed horizontal with two rods 65, 65 * are connected, which are themselves mounted on a vertical rod 67 . This arm 7 rotates at 68 on a rod 70 * which is carried by a hub 71 which is rotatably mounted around the rod 4. The arm 07 also rotates at 09 on an Ar® 72, which rotates on the horizontal rod 9 at its other end. As described in the above mentioned French patent, .on which to this purpose, "erläxigertei. 2 *" ce of Aer ::: it c * a

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Rod 88, which is adjustable in length, articulated attached, with a lever 85 hingedly attached to the other end 87 of this rod. This lever 85 that on is attached to a plague point 86, carries a roller 84-, the cooperates with a cam 83. This cam is keyed for rotation on the drive shaft 36, which is already was mentioned.

According to the invention, the arms 63, 63 'carrying the hook knives 62, 62 * are mounted under the control of pneumatic press pots 64, 64', the activation of which is connected to the microswitches MS, MES ¹ .

The presentation of the objects to be printed under the first printing station is ensured according to the invention by a conveyor belt, which consists of two parallel, synchronously running chains 54, 54 *, which carry carriers 55, which are intended to carry the body of the «* the object to be printed and the carrier 55 ^f ,

which are intended to hold the lower part of these objectsThese chains 54, 54 'run over a mit slave pinion 56 ', which rotates by a chain 57 is driven, which is set in motion by a pinion 58 will. This latter pinion receives its movement of a pinion 59 on the shaft of a Maltese cross

0 09809/0094 originally inspected

60 is keyed, which cooperates with a crank pin 61, which is on the output shaft 4θ of the reduction gear 46 is wedged.

A transmission device is arranged between the two printing stations of the machine which, according to the invention, comprises a fork 90 which is fastened to the end of a lever 91 which is fastened at 92 and 93, respectively, to two arms 95 and 96 which are mounted on axes of rotation 97 , 98 are wedged so that the lever 91 forms one of the seldom parts of a deformable Faral * lelogram and thus moves parallel to itself. The axles 97, 98 carry pinions that are connected by a chain 99. In addition, a pinion 100, which is keyed onto the axle 97, engages in a pinion 10 on which a push rod 102 is articulated, which is itself articulated on a lever 103. The lever 105, which rotates at a fixed point at 104, carries at its other end a roller IO5 * which cooperates with a cam 106 which is cut into a vertical, flat disk.

The bottom of the fork 90 is also provided with a suction nozzle 120 provided, which is connected to a suction device, not shown.

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According to the invention, the machine is supplemented by a drying chain 120, which consists of parallel chains 110, 111, between which rockers 107 are arranged on pivot pins 108, 10 9, which are located on the chains 110, 111. These chains 110, 111 run via driver pinions 112, 113, which are keyed onto a shaft 114 which is driven by a pinion 115 which is connected via a chain 116 to a pinion H ¹ J which is on the output shaft 40 of the Reduction gear 46 is keyed. The chains 110, 111 also run over pinions 118, 119 * which are arranged in the vicinity of the rotating device belonging to the second printing station of the machine, and then run into a drying oven, not shown.

The operating cycle of the printing machine according to the invention for printing the two surfaces of the same object is described below. For this purpose, it is assumed that this ^{object carried by the carrier parts 55 * 55 f of} the chain 54, 54 'is gripped by the rotating device 50, 51 which belongs to the first printing station. This gripping takes place while the viewing screen carrier slide C is stopped in its outermost position of the corresponding horizontal movement. The cam 35 according to the invention is shaped in such a way that the stencil carrier sleeve C remains stationary for a certain period of time in each of its extreme sliding positions, so that the gripping tip 51 has enough time to move the counterpart to be printed.

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stand to grasp with great operational reliability.

The stencil carrier plate C takes its horizontal one / shifter movement under the control of the slide 22 Bodice, which is itself driven by the linkage « that from the push rod 25, the lever 26, the slide rod 30, the rollers 33, 34 and the cam 35. And at the same time bring the rotating device 50, 51i from the set the pinions 48 and 78 are actuated, which are in the racks 47 and 79 intervene, the gripped object in peace. • iation with the sieve template 17 and lets it in without sliding Touch «it this stencil roll off itself moves horizontally while the doctor blade 62, which against the sieve template 17 is pressed, the passage of the Color for printing on the first surface of the item through the mesh of the screen template. When this printing is finished, i.e. when the stencil carrier carriage C arrives in its other extreme sliding position, the object whose one surface is currently being printed was brought into the fork of the transport device by the rotating device 50, 51, which at this point in time a tangential position in relation to the path of the counter Occupies status. The cam 35 according to the invention is designed in such a way that the stencil carrier sleeve C is in each of its extreme sliding positions for a certain time remains, so that it is possible for the gripping tip 51 to

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IS

. and releasing the object with a high degree of operational security.

The printed object is now taken over by the transport device and it is important to determine that their movement is initially carried out in such a way that it is essentially tangential to the path of the object, when it was held by the rotating device 50, 51, so that the transport device come into effect immediately can without having to wait for this rotating device 50, 51 to be withdrawn beforehand. Also secures the suction nozzle 120 holds the object firmly in the fork 90 during the transfer of that object from the first to the second printing station.

During this transfer, the following operations take place synchronously: Presentation of a new object at the first printing station by pushing the chains $ k, 54 'forward by one step under the drive of the Maltese cross 60; vertical release of the screen stencils 17 and 18 and the doctor blade 62, 62 ·, as a result of the deformation of the compressible parallelograms 6, 10, 7 and 6 ', 11, 7 ¹ under the action of the linkage, which successively from the cam 23, the roller 84, the lever 85, the lower part 88 and the extension of the arm 6 *, and finally return

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of the stencil carrier carriage C into its initial position as a result of a new engagement of the rods using the cam 35. It is thus clear that the vertical lifting of the doctor blades 62, 62 ^{f is} greater than that of the screen printing stencils 17, 18, since the parallelogram 70, 68, 72 that the doctor blades 62, 62 ^! carries, has a lever arm which is larger than that of the deformable parallelogram mentioned above, which carries the screen templates 17 * 18. As is known, this vertical lifting of the doctor blades 62, 62 'in relation to the screen stencils 17, 18 when they return to the starting position is necessary in order to prevent any untimely passage of the printing ink through the meshes of these screen stencils during this movement.

In a manner analogous to what has been described above, the transport arm 71 lies tangentially against the Rotating device '50', 51 'that goes to the second printing station tion, so that it is immediately in its outermost corresponding position when the slide is stopped. ment of the horizontal shift can intervene. This intervention takes place in a manner known per se by pushing the tip 5I forward in the direction of the

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Lower part 50 under the control of the lever 52 actuated by the press pot 53.

The tangential arrangement of the lever 91 allows it to withdraw immediately, as well as the object of the rotating device 50 ', 51' was taken over without having to wait for this device to start rotating. This results in a reduction in necessary return time for the transmission device according to the invention, in the initial position, and accordingly a significant improvement in the speed of operation of the machine.

As is easy to understand, the second surface of the object is printed in an analogous manner and Way to print on the first surface, and during the Printing this second area in the second printing station becomes the first area of a new item printed in the first printing station »

The object whose both surfaces have been printed ^ is deposited by the rotating device 50 ', 51', which belongs to the second printing station, namely in

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one of the rockers 107 of the drying chain HO, 112, and from this continuously into the associated Drying oven led.

The toothed rack 79, which ^{engages in the pinions 78 1} for the entrainment of the gripper tips 5I * 5 ¹ ', is guided in the initial position by the screen stencil carrier carriage C during its return movement, even though the aforementioned screen stencils are slightly raised vertically during this return movement « As shown, rollers 8l 'oil', which are carried by said toothed rack, cooperate for this purpose with vertical plates 82, 82 * which are fixedly attached to the screen stencil carrier carriage C.

If any one of the gripper tips 51, 51. ' there is no object to be gripped, the corresponding lever 52, 52 'closes the associated microswitch MS, MS ¹ and this latter activates the corresponding press pot 64, 64 ^f so that the associated doctor blade 62, ö2' is lifted from the corresponding screen template and, accordingly, no printing ink is pressed through the screen stencil when the screen stencil carrier carriage C is moved.

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Of course, the present invention is not limited to the embodiment described and illustrated limited, but includes any possible modification

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Claims (7)

1556966 Claims: 1.) Machine for continuous printing of the two Surfaces of an object of oval cross-section in a single pass of the kind used for this purpose Printing stations and a trans « Port device for transporting an object from one printing station to the other, each printing station having a printing device and opposite this "a rotating device" which is such that it grips an object and makes contact with it without sliding the printing device can roll while the transport device is designed so that it can a first position in which it follows an object carried by the rotating device of the first printing station Printing on one of its faces takes hold in a second Can move the position in which it places the object on the rotating device belonging to the second printing station, for printing on the other of the surfaces of said Object, characterized that said transport device has a tangential course has to the path that the object follows when it comes from any of the rotating devices belonging to the printing stations is taken along. «21 009809/0094 2.) Machine according to claim 1, characterized in that that the transport device has a transport lever, a fork carried at the end of this lever for picking up an object, two parallel ones Arms arranged on said object according to two separate pivot pins and two axes mutually separate a distance equal to that of the two pivot pins, with said arms on * the axes are keyed and the axes are controlled in alternating synchronous swiveling, synchronous with the turning devices belonging to the printing stations, so that the transport lever is one of the sides of a deformable Paralielogrammes forms, and alternately parallel to itself from a first station in which it is tangential to the path that an object is on the Rotating device of the first printing station follows, into a second position is brought in which it is tangential to the path dsm the said object on the rotating device which belongs to the second printing station. 3) Machine according to claim 2, characterized in that that the axes of the transport device are firmly connected in rotation to the same pinion, and that to drive this pinion, the transport device has a cam which can be rotated synchronously with the rotating devices the printing stations is mounted, a drive lever articulated to a pest point, a G0S809 / ÖÖ94 «* 22 w 4.3 Roller carried at the end of said drive lever and pressed into contact with the cam and a connecting push rod, which on the one hand drive lever and on the other hand on said pinion articulated 1st. 4.) Machine according to claim 1, characterized in that that the transfer device is also provided with a suction nozzle in the bottom of the receiving fork for the Objects is arranged. 5.) Machine according to claim 1, characterized in that that, since it is a question of printing stations that work according to the so-called screen printing process, of the type each of which has a horizontally movable slide and a screen stencil and a doctor blade, which are of the Carriages are carried and are movable perpendicularly in relation to this, in combination with a rotating device from a lower part and a gripper tip that is too movable on this to press an object against it, 'with the lower part and the tip in synchronous rotations are entrained by the play of at least one rack, which is in the horizontal displacement is firmly connected to said screen template, the horizontal alternating displacement of the carriage is ensured by a drive device that - 23 009809/0094 uses a rotating cam, the profile of which is arranged so that the carriage a certain stopping time has horizontal displacement at each of its outermost points. 6.) Machine according to claim 5, characterized in that the drive device of the carriage also has a longitudinally slidably mounted rod, two rollers carried by the rod in contact with the associated one Cams in diametrically opposed positions, a pin that of the said rod apart from the said pivot, a lever that is rotatably mounted at a fixed point and with a Slotted hole is provided in which said pivot pin engages and a push rod that is on the one hand on the called lever and on the other hand is articulated on the carriage. 7.) Machine according to claim 5, characterized in that the lower part and the gripper tip of a printing device each mounted on an independent pinion that meshes with a special rack that drives the shift is firmly connected to the associated screen template, the rack belonging to the said tip is slidably disposed in the longitudinal direction, and on each of them - 24 009809/0094 as Ends with a roller that interacts with a plate, which is firmly connected to the sieve template and perpendicular to the sliding direction of the said rack 8-) machine according to claim 5, characterized in, that the presentation of the objects to be printed under the first printing station by a transmission chain with step-by-step feed is carried out, which is driven synchronously with the alternating movement of the stencil carrier carriage, while after printing on their second surface the objects are placed on a drying chain by the rotating device belonging to the second printing station, which is different from the transport chain and moves continuously forward. 009809/00 94 Blank page