DE2363230B2 - DEVICE FOR PRINTING CONTROL AND TAX MARKS ON OBJECTS, SUCH AS BOTTLE CAPS - Google Patents

Description

The invention relates to a device for printing control and tax marks on counter stands, such as bottle caps, consisting of a

a housing in which is arranged a printing unit and associated with a counter for scanning d \ e guided past items.

Such a device has become known from FR-PS 1349899, for example.

The object underlying the invention is to be seen in a printing unit for printing To train control and tax marks on objects according to the offset process in such a way that that no unauthorized or unregistered printing can take place.

The device known from FR-PS 1349 899, however, has the disadvantage that it is only intermittent can work. It is also supposed to work completely mechanically and is therefore cumbersome and in expensive to manufacture. The number of units they produce is also not very high.

The invention not only achieves the above-mentioned object, but also the Deficiencies inherent in the state of the art are overcome.

According to the invention it is proposed that the printing unit is designed as an offset printing unit and Cliché and printing cylinder are arranged in a closed chamber, which has a window-like opening the installation of an application roller of the inking unit on the cliché cylinder and a second window-like Has opening for the printing process of the printing cylinder and the scanning unit from two in the printing area sensors arranged one behind the other in the path of movement of the objects, of which one is provided directly at the pressure point and electrical switching pulses emanating from the sensors Operate the counter via a circuit.

In an advantageous development of the invention, electromagnets are provided in the circuit of the scanning unit, release the pressure extinguishers under pressure from a spring when the power is switched off.

Further advantageous developments of the device according to the invention are set out in the subclaims specified.

By arranging an inking unit, as it is known from offset printing, it is achieved that only rotating parts are present, which leads to a significant simplification of the entire construction leads. In addition, there is a shortening of the pressure and an increase in the Reliability and operational safety. Since the printing facility is in its own, except for the two Window closed chamber is housed, it is largely protected from any unauthorized intervention.

Although offset machines are known e.g. from DL-PS 44578, this printing principle has been used so far not used for printing on objects such as bottle caps. As from the FR-PS 1349 899 is known to those skilled in the art preferably used one with its stamp surface matched to the size of the bottle cap and going printing block. The use of an offset printing unit for printing on objects, like bottle caps, therefore cannot have been close by.

The drawings show an embodiment, namely in

1 shows a schematic view of a machine according to the invention for printing metal bottle closures by means of a printing block or cliché;

FIG. 2 shows an enlarged partial section through the machine along the line 2-2 in FIG. 1; FIG. Fig. 3 is a schematic representation of the electrical

niche subordination of the machine.

The machine shown contains a fixed table 1 for receiving the bottles ß. The table 1 is connected to a vertical stand 2, a device A for bringing the bottles and a device / for printing.

The device A for feeding the bottles consists of a star, ie of a disk 3 with grooves 4 and is arranged above the table 1 parallel to the latter. It is set in rotation by a motor 5 from its output shaft 6 and via a shaft 8 to which the disk 3 is attached.

The printing device / is firmly connected to the stand 2 and arranged above the point to which the disc 3 transports the bottles B to be printed; the device is adjustable in height to the different bottle sizes by means of an arrangement not shown; it is an offset device and comprises a sub-assembly or inking unit E for inking the cliché to be printed, a sub-assembly D for printing the cliché on the shutters C and an electronic sub-assembly F for scanning the shutters and for counting the imprints.

The sub-assemblies E and D for inking and printing the cliché are arranged in the same housing 9 with two adjacent chambers separated from one another by a wall, of which one chamber 9 ″ is open at its top and the sub-assembly E for inking.

ben encloses, while the other chamber 9 * is practically closed and ^{made inaccessible by a sealed wall 9 r} and contains the sub-assembly D for printing.

The sub-assembly E for inking is immovably arranged in the chamber 9 ″ of the housing 9 and contains two parallel support plates 10, between which a trough 11 open on one side for receiving the printing ink, a roller 12 contacting the open edge of the trough 11, one through a conventional, not shown device so moved roller 13 for transferring the printing ink, which comes alternately with the roller 12 and a roller 14 in contact, which in turn touches a roller 15 distributing the printing ink and a last roller 16 contacting the roller 14, which is used to color the cliché. The roller 14 is driven by the motor 5 via a belt 17, which wraps around the axis 14 ", while the rollers 13, 15 and 16 about their offset axes 13", 15 "

and 16 ° are set in rotation by at least the drive roller 14 which is in contact with them. The roller 13 is at regular time intervals by the roller 14 by means of a likewise known and not reproduced device in circulation.

The immovable sub-assembly E is carried by the axle 14 ° of the roller 14, which passes through the walls of the housing 9 and in the chamber 9 ″ on the one hand by means of brackets 18 which are firmly connected to the upper part of the support plates 10 and on butt the heads of screws 19 which are screwed into projections 20 of the housing 9, and on the other hand is held in place by an intermediate support 21 which the lower

5 ^ 6

If parts of the two support plates 10 are connected to one another, the device triggers an alarm 39

det and to a screwed to the housing 9 and stops the motor S.

Screw. The first probe 32 is also with a flip

The printing sub-assembly D is located in flop or a bistable circuit 40 connected to de the chamber 9 ^h of the housing and consists of a 5 on the basis of pulses received by the sensor 32: the plate to be printed mark containing a signal via an output 40 ^{"releases; roller 23 is} in contact with the inking roller 16 of the lower now no signal via the second output 40 *. Eir order E via a window 9d, signal for the return of the flip-flop to zero through which The two chambers are connected to each other in which the position of the signal at the output de; The roller 23 is also reversed with a 10 flip-flop, is contacted by a cell or a pressure roller 24, which is something from the UN- OR-INCLUSIVE Gate 41 protrudes either through a front side of the housing 9 through a window 9 'of the chamber- the electromechanical counter 37. On both sides of the pressure roller 24 and or through a security key ontakt 42 perpendicular to its axis are two roller extinguishing specifications. The output 40 ″ of the flip-flop 40 is arranged with one direction, which in each case at the end of a second input of the AND gate 36 and its output rod 25 cause the deletion of the pressure 40 * with an input of an AND gate 43 have connected rubber finger 26, which slides in a guide 27, 33 connected to the housing, whose second input is fixedly connected to the second sensor.

with an electromagnet 28 pressing the finger 26 against the second feeler 33 is still between them

Action of a spring 29 in front of the roller 24 in the 20 second input of the AND gate 43 with a third

withstands. The roller 23 carrying the cliché and the input of the AND gate 36 are connected. From-

the pressure roller 24 are about their axes 23 "and gange of the gates 36 and 43 are via an OR-IN-

24 ", over which the belt 17 runs. CLUSIV gate 44 with a machine stopping

The electronic subassembly F is connected to off warning device 45. The devices would take a tachometer for the engine and 25 39 and 35 for warning and shutdown of the machine, two sensors for scanning the bottle can only be canceled by actuating the safety key lock C in a housing 30 next to the contact 42 through which the mowing housing 9 provided and can be put back into operation by a sealed machine. Lid closed and therefore inaccessible. The machine works as follows: the engine speedometer is a tachometer generator 31 which, in normal operation, the sub-assembly E is more likely to be keyed to the shaft of the engine 5. A home for the coloring of the printing plate of the duktionsfühler 32 for scanning a bottle tops provided in the chamber 9 "housing 9, wherein the adjusting screw 22 circuit C is screwed underneath the housing in the vicinity so that the inking roller 16 with the window 9 ' and the printing roller 24. The roller 23 carrying the cliché comes into contact with the scanning area of the sensor 32. The bottles B with the metal closures C opposite the direction 5 in which the one to be printed is through the grooves 4 of the star 3 is advanced under the bottle closure C, guided in front of the printing device, which is driven by the motor 5 on-pressure roller 24 to immediately advance the closures. The motor 5 also drives the rollers to scan their printing. A second induction 14, 23 and 24. As a result, the roller 12 removes the printing ink from the axis of the printing roller 24, the sensor 33 is set in rotation next to the sensor 32 vertically below 40 by the roller 14 arranged that he from the tub 11 and transfers this color to the closures at the moment of printing abta- roller 14 with the help of the transfer roller 13, which can most. the roller 15 a continuous film of pressure -

Apart from the sensors 32, 33 and the tachometer generator, color is distributed on the roller 14. The roller 14 transfers

31, the sub-assembly comprises a monostable 45 the printing ink on the inking roller 16, which is now soft Mixing pulse generator 34 (flip-flop and unifunctional - colors the cliché carried by the roller 23 delay circuit), which becomes one at the first probe. The roller 23 now brings an imprint of the

32 and also a second, on the clichés on the pressure roller 24, which has the input lying at the tachometer generator 31, which passes through the window 9 'of the housing via a first output 34 ° when triggered by 50 on the shutter C. imprints.

the sensor 32 a time-controlled signal, ie to- When the metal shutter C is brought up

inversely proportional to the speed of the tachometer electrode, the first sensor 32 sends a pulse to the

tor outputs whose voltage on the load terminal monostable pulse generator 34, which is now on his

Men of the RC circuit of the pulse generator transmit output 34 "emits a signal of a length that

will. If no signal is output via output 34 ", 55 inversely proportional to the signal sent by the tachometer

Bern, such a speed is measured via the second output tergenerator 31; this Si

34 *. The pulse generator 34 is on the one hand over its pulse length is therefore also inversely proportional to

Output 34 "with a cell or an electronic feed rate of the bottles B, which is from

see AND gate 35 and on the other hand via its the motor through the star 3 are taken.

Output 34 ^fc with one input another 60 The signal is so long that with normal feed

AND gate 36 connected. The other input of To- speed of the bottles, the metal shutter to C

res 35 is reached with the second sensor 33 and its output second sensor 33 before the signal ends

with an electromagnetic pulse counter 37 is complete. The sensor 33 now delivers when passing

bound. In parallel with this counter 37, an electrical closure C is a pulse, namely in the

Niche device 38 arranged, which checked 65 instant in which the shutter of the roller 24

whether the counter is printed in the manner necessary for its advance. This impulse unites in that

Normal time also properly around a unit AND gate 35 with the signal at output 34 "of the

is advanced; the counter 37 does not work properly monostable pulse generator 34. The gate 35 is now

a pulse, which triggers the electromechanical counter 37, so that this one unit further counts. Each time a cliché or a brand is printed on, the system counts up by one unit.

When the machine is put into operation, the flip-flop is switched in such a way that there is no signal at output 40 ″, while one is output at output 40 ^h . If a shutter is brought up to sensor 32, it gives a signal the bistable pulse generator, which tilts, emitting a signal at output 40 ″, but none at output 40. If the shutter is brought up to the sensor 33, it emits a signal to the AND gate 36, which already receives a signal from the output 40 ″ of the flip-flop, but none from the output 34 ^{h of} the monostable pulse generator, so that the gate 36 does not trigger the warning signal 45.

If the electromagnetic counter 37 is by one unit advanced, i.e. after the capsule has been brought up to the sensor 33, this counter gives via the OR-INCLUSIVE gate 41 with the flip-flop 40 a pulse which returns the starting position to take the next count without giving a warning signal.

The start-up of the machine requires the roller arrangement to be rotated several times before the closures C are printed in order to obtain proper coloring of the cliché provided on the roller 23 and thus the printing roller 24. The machine must therefore also be able to work without the counter switching on, while the counter working is absolutely necessary if a metal closure is to be printed. The presence of the sensors 32 and 33 enables this condition to be met, since there is no counting if the sensors do not emit pulses, that is to say if there are no bottles; In contrast, a count is carried out by the electromechanical counter 37 as soon as closures have been scanned under normal operating conditions

Lic electronic subassembly Fhat also the task, the risk of fraud or error or of being depressed without the counter working to prevent.

Indeed, if for some reason the electromechanical counter would operate normally fail, or if the speed of the counter's counting wheels drops, for example due to dirt of the wheels, the device 38 for checking the normal counter advance will give an alarm and cause the machine to come to a standstill.

If, on the other hand, you wanted to introduce bottles in the opposite direction to the normal operating direction 5, the closure would first pass under the second sensor 33 and then only under the first sensor 32, so that the pulse of the sensor 33 does not match the one normally emitted at the output 34 " The signal of the monostable pulse generator coincides when it is triggered by the sensor 32; in this case no counting could take place because the AND gate 35 would not be triggered -Flop 40 has been emitted through output B. These signals would emit a signal at the output of AND gate 43, which then triggers the alarm and causes the machine to come to a complete standstill with the aid of the ODFiR-lois 44. The machine. ' can then only be put back into operation when the safety key contact 42 is restored, which causes the bistable pulse generator 40 to tilt and thereby suppresses the signal given at its output 40 ″.

If the shutter C to be printed is on

ίο passes the first sensor before the second reached, but too slow in relation to that of the speedometer generator 31 measured speed, there would be no more pulse from the sensor 33 during the one from the monostable pulse generator 34 on his Output 34 "given long signal, since this has been output by the sensor 32. In In this case, the pulse given by the sensor 33 would take place while the monostable pulse generator 34 would be at rest, submitting a

ϊο Signal at output34 *. At that moment I would a signal can also be emitted via the output 40 ″ of the flip-flop, since this is transmitted by the sensor 32 has been drawn. The three combined signals would now trigger the AND gate 36 and thus one Use the OR gate 44 to cause an alarm and a standstill of the machine. A restart the machine and the alarm would only be switched off by tapping the safety key contact 42 causes.

Finally, in the event of a power failure, it is impossible to carry out printing by hand, for example by rotating the axis 14 "of the roller 14 by hand, since in this case the one in the housing located and fed with normal current electromagnet 28 are no longer live and the rubber fingers 26, which have been urged back by the springs 29, in the guides 27 slide and press against the pressure rollers 24, on which they erase the entire cliché impression.

The offset printing process enables the closures to be marked in a continuous manner. The printing device is simple, since it consists only of the rotating rollers, without any translation moving or floating parts are required.

If the machine is at a standstill, the sub-assembly E for coloring the printing cliché can easily be cleaned, since it is sufficient to unscrew the screw 22 and remove the support plates 10, which the rollers 12, 13, 14, 15 and 16 as well as the Take along the tray 11 for the supply of the printing ink. Another advantage of the invention consists in one

Simplification of the mechanical parts of the machine due to the use of an electronic one Counter, an electronic device for scanning the closures, to control the machine and to find unauthorized use. A further development of the invention would exist therein, a printing ink on the basis of one under a effect of a corresponding irradiation immediately to use polymerizing resin. To di < To dry printing ink, it would then suffice to add an irradiation source to the printing device switch that point to the top of the locks at the exit at the bottom of the device is.

For this purpose 2 sheets of drawings

Claims (12)

Patent claims: 1. Device for printing control and tax stamps on objects such as bottle caps, consisting of a printing mechanism arranged in a housing and a scanning unit connected to a counter for the objects being passed; characterized in that the printing unit is designed as an offset printing unit and cliché (23) and printing cylinders (24) are arranged in the closed chamber (9b) which have a window-like opening (9d) for contact with an application roller (16) of the inking unit (£) to the cliché cylinder and c; ne second window-like opening (9e) for the printing process of the printing cylinder (24) and the scanning unit consists of two sensors (32, 33) arranged one behind the other in the printing area in the path of movement of the objects (B), one of which is provided directly at the printing point and electrical switching pulses emanating from the sensors (32, 33) actuate the counter (j7) via a circuit (34, 35). 2. Apparatus according to claim 1, characterized in that in the circuit of the scanning unit Electromagnets (28) are provided, the pressure extinguishers under pressure from a spring (29) Enable (26) when the power is switched off. 3. Device according to claim 1, characterized overall 3 ^"1 indicates that the circuit (34,35) comprises a first switching element (34) which generates signals of a duration that slightly be above the time that the conveyance time of an object between the two sensors (32,33) and the input of the switching element (34) is connected to the first sensor (32) and its output to the input of an AND gate (35), the second input of which is connected to the second sensor (33 ) and the output of which is connected to a counter (37). 4. Apparatus according to claim 1 or 3, characterized in that a safety circuit (36, 38 to 45) of the scanning unit has a second switching element (40) which is at an output (406) Generates signals when no pulse is applied to an input connected to the first detector (32) is connected, and that the output (40b) of the switching element (40) with the input of a second AND gate (43) is connected and its output with an alarm device (45) which causes the device to be switched off. 5. Apparatus according to claim 1, characterized in that the safety circuit (36, 38 to 45) on the one hand has a third switching element (40) which generates signals at an output (40α), if there is no pulse on an input connected to the first detector (32) fet, and on the other hand has a fourth switching element 134) which, after a time has elapsed, over ier conveying time of the object between the fceidcn sensors (32, 33), signals on a Output (346) generated after an input K ng, the fi connected to the first sensor (32) _5, a pulse has arrived, and the outputs | 40ίΐ and 346) of the two switching elements and the e detector (33) connected 36) with the three inputs of a third AND gate ( whose output leads to an alarm device (45) which causes the device to be switched off. 6. Device according to one of claims 1, 4 or 5, characterized in that the safety circuit (36, 38 to 45) has a restart switch (42) which is connected to the second input of the third switching element (40) is connected, which delivers no pulses via output (40α) as long as there is no pulse on this second input. 7. Device according to one of claims 1, 5 or 6, characterized in that the output of the counter (37) is connected to the second input of the third switching element (40), which delivers no pulse on its output (40α) if there is no pulse on the second input. 8. Apparatus according to claim 7, characterized in that the reclosing switch (42) and the output of the counter (37) is connected to the two inputs of an OR gate (41) are, the output of which is connected to said second input of the third switching element (40) is. 9. Device according to one of claims 7 or 8, characterized in that the second and third switching elements for signal generation consist of a bistable unit (40) whose one input is connected to a first detector (32) and its second input to the Restart switch (42) and to the output of the Counter (34, 35, 37) is connected via the OR gate (41), and the two outputs (40iJ, 40b) the bistable unit (40) of the Outputs of said third switching element; and said second switching element are. 10. Apparatus according to claim 5, characterized in that the first and fourth switches Form a monostable unit (34) for signal generation, the input of which with the first Sensor (32) is connected and its two outputs (34a and 346) from the output of the first Switching element and the output of the fourth switching element are formed. 11. Device according to one of claims ' to 6, characterized in that the safety circuit (36, 38 to 45) has a switching element (38 for checking the count, which is connected to the terminals of the counter (37) to its output with an alarm device (39 is connected, which causes a shutdown of the device. 12. The device according to claim 10, characterized in that the monostable unit (34 has a second input, via which the duration of the signals is controlled and which is connected to ei nem tachometer dynamo (31) is connected, de ge with the drive motor (5) of the device is coupled.