DE2161219A1 - Printing press - Google Patents

Description

Until recently, sales slips were handwritten, whereby the customer received a carbon copy. The use of embossed metal plates for Eredit purchases in Department stores eventually led to the completed, ^ eprä ^ ten plastic cards, which found widespread use have ο cards of this type are called print elements and contain various besides the name of the customer other information. The plastic cards are used as a data file Iu used a data recording device, where cino Drueliwiilze a set of forms lined with carbon paper £ (; ^ οιι pressed the embossed surface of the card

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Other information is handwritten on the form, before the deal or process is over.

Machines were developed with several Bruukwheels work. Each of the print wheels has several surfaces on which different print characters are located. The pressure wheels are held in a group and are aligned rait the position in which the credit card is inserted for the purpose of pressing. So can variable data, for example the amount of money of the purchase, along with the fixed details of the embossed card on the form to be printed. The use of a variable pressure unit together with fixed or fixed pressure elements ments enables printing to be more accurate as required Information to counter the disadvantages of handwritten, erroneous entries.

Although data recorders are suitable at the time of conventional design, produce documents or forms in a legible and accurate manner, in order to use them subsequently in data processing systems, it has ψ issued manufacturers, that a large amount of data recording devices are required, different types to the requirements Application purposes to meet. One of the

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eme /, a standardized data logger

to create application devices for various purposes, is that the forms are different in thickness.

When recording certain transactions are multiple copies required for inventory and other accounting purposes. These copies can be considerable in thickness own, especially when using intervening carbon sheets together with a tabulation card and an un-

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transparent or bound cover sheet. In other applications, fewer copies are required, so that the liicice of the set of forms changes accordingly. As a result, it is necessary to hold the printing roller in each case at a specific printing position at a distance from the platen in order to obtain an adaptation to the various types of this on the forms. This adaptation is necessary in order to obtain dense, high-quality prints which are suitable for data processing devices.

Various proposals have been made to build a machine of the type mentioned in the opening paragraph in such a way that clear and legible impressions can be obtained on the copies regardless of the different thicknesses of the forms. Some of the devices of the known type work with a compensating or compensating pressure abutment, which is spring-loaded and can, according to Haßgäbe, be displaced in the direction facing away from the pressure roller. However, this arrangement only allows a certain limited amount of compensation. Other devices work with a compensating pressure roller, in which the axis of rotation can be adjusted in order to adapt to different form diaries. In this case, it is necessary to manually set the printing roller to each different diekeimass of the forms to be printed. Another compensating pressure roller device, comparable to the device according to the invention in terms of its performance, but different in structure and mode of operation, is explained in US Pat. No. 3,277,822.

Accordingly, the present invention provides a data recording device created, which has a compensation device associated with the pressure roller to the pressure roller im Ihstar.l from the pressure abutment to a specific one

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Adjust the print position. This is done according to the thickness of the forms to be printed. The data recording device according to the invention also has a device for holding the printing roller in its selected position during printing.

The object of the present invention is to provide a printing machine which forms the print and w has a compensating means to adjust means for Dickenabfühlung by a predetermined printing position of the platen roller in adaptation to the desired Dide.

Furthermore, a locking device is to be created, uri to lock the print roller in its suitable printing position during printing, the print roller should be unlockable and be movable into a raised position above the platen, the platen being larger Distance from the pressure abutment is about one return movement to enable the printing roller drive in the starting position.

The Kompensiervorriehtung regulates the distance of the pressure roller with respect to the pressure abutment in adaptation to different Form Thickness. The compensating or compensating device according to the invention can be installed in various printing machines and data recording devices.

The printing machine according to the invention is capable of producing clear and uniform prints on various types of business forms, which undergo considerable variations subject in the thickness of the form sets.

The invention is explained using an exemplary embodiment with reference to the accompanying drawings.

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Fig. 1 is a perspective view showing a printing machine a compensatingly guided pressure roller according to the invention, showing the print head in an open position Position;

Fig. 2 is a side view of the pressure roll balance mechanism and the drive, seen along the line 2-2 in Fig. 1, but at an enlarged scale Scale reproduced;

Fig. 3 is a sectional view taken on line 3-3 in Fig. 2; with the printhead in the closed position, the leveling device and the position of the platen and the drive mechanism are shown in relation to the platen of the machine;

Figure h is a partial front view showing the location of the balancer when the platen drive has been moved from its home position;

FIG. 5 is a view similar to FIG. 4 below Representation of the position of the compensation device during a printing process;

FIG. 6 is a view similar to FIG. 4 below Representation of the position of the balancer when the platen drive is in the working position achieved; and

FIG. 7 is a view similar to FIG. 4 below Representation of the position of the compensation device shortly before the drive returns to its starting position.

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The "device according to the invention is for various printing machines known type suitable. As a result, only those for ordinary printing machines will be discussed in the course of the description required elements or components shown and explained. For the purpose of description the invention is reproduced with reference to a data recording device, for example, when used on a device provided with a printhead, as described in the US patent t No. 3,158,091. However, the invention is in in the same way on data recording devices with fixed ' Printhead applicable, as in US Pat. No. 3 OiS 72 ^ described devices.

According to FIG. 1, the data recording device has a base 10 and a print head 12. The print head can be swiveled hinged at 14 to the base 10 and between an open position spaced from the base and one closed position relative to the base pivotable. The data recorder is also with a bed or a pressure abutment l6 which has suitable guides IS and 20. The tours serve the HaI-P ten of an embossed card 22 on which the data to be printed are located.

The device shown in Fig. 1 is also provided with a variable data printing unit, which consists of several coded pressure wheels 24 on the pressure abutment adjustable. However, since the pressure wheels are not essential to the invention and are to be regarded as known per se, sio not explained in detail.

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Go :: iLlss Fig. J is the print head 12 with a pair of side slats 2S and 30, which are held at a distance from one another by a U-shaped guide body 32. A Drive 34 guided by the guide body 32 is along the larger part of the guide body movable. The drive carries a pressure roller 26, which consists of the "in FIG. 3 The starting position shown can be moved across the pressure abutment l6 into a working position shown in FIG. 6 is to complete the print when the printhead 12 is in the closed position. The movement the print roller across the platen is used to print the data on a form F, which is on the the pressure abutment located elements. When a print is completed, the print head is in its open position Position, after which the drive is returned to the starting position.

According to FIG. 2, the carriage 34 comprises a U-shaped body which forms a pair of side walls 40 and 42 extending downwards. A rod 44 is carried by the side walls and extends outward over them. A pair of rollers 46 and 48 are each mounted at one end of the rod body and can run along the lower edges of flanges p0 and j2 of the guide body 32. The knobs are used to control and guide the movement of the drive and are described and illustrated in detail in US Pat. No. 3,135,091.

The pressure roller 36 is mounted on a shaft ^ k which is rotatably held at one end in a bearing block 56 and at the other end in a bearing block 58. The side wall 40 is provided with an opening 60 in which the bearing block 56 is slidably held, while the side wall 42 has a corresponding opening 62 around the other

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Bearing block | 3S slidably guide. As will be explained below, the platen 36 can be moved between a raised position shown in FIG. 1 and a lowered position. This lowered position is selected from a large number of possible positions at a distance from the pressure abutment, the distance according to FIG. 4 being gerin ger than the distance in another position. The pressure roller 36 is normally clamped by a paaX "by springs 64 and bb in its raised position. The springs 64 and ψ are for this purpose with the ends of the rod 44 and the shaft 5 connected ^

Referring now to Figures 2 and 3 of the drawings, a balancing mechanism with actuating means including a pair of control bodies 68 and 70 is shown. The control bodies 6 S and 70 are attached to the opposite ends of a sleeve 72 and form a one-piece control unit. The control unit is provided between the side walls 40 and 42, while the sleeve 72 is rotatably guided on the rod 44. The control bodies 6s and 70 are each provided with a control edge 74, which ^{is effective on the control blocks l} j6 and i58. Each control body has a plurality of ratchet teeth 76 and an extension arm 7 &. In addition, the control body 68 is equipped with a roller 80 mounted on the arm 78.

Geinäss Fig. 3 ₅ 4 and j are dio control edges 74 of their centers of rotation about the rod 44, wherein the smallest distance from the OCE! Litte the rod 44 having part is referred to as a dwell zone eccentrically with respect to. When the control bodies are in the position shown in FIG. 3, the dwell zone of the control edges is in contact with the bearing blocks ^l j> 6 and 58, which is why the pressure roller 36 is in its raised position by the springs 64 and 66 [se-

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will hold. , The control body are rotated to the position shown in Figs. 4 and j position Venn, the cam or projection comes at each of the control edges in contact with the control blocks, which is why the pressure roller itself results in a lowered position befindete from Fig. 3, the control bodies 68 and 70 are normally urged counterclockwise under the tensioning action of a spring 82 to cause the cam or projection on each of the control edges to act against the control blocks. In this way, the platen is moved down to the appropriate printing position. The use of two control bodies, one of which is provided at one end of the shaft 54 and acts opposite a separate control block, ensures uniform raising and lowering of the pressure roller without tilting of the roller or bending of the bearing blocks in their vertical sliding movement occurs within openings 60 and 62 of side walls 40 and 42.

According to FIG. 3, a locking body 84 is pivotably provided on the side wall 42 of the carriage 34. The latch body has a pawl 86 which, with the pawl teeth 76 of the control body 70 cooperates. A projection 88 extends upwards in the direction of a release body 90. According to FIG 3, the locking body 84 is normally tensioned in the clockwise direction by a spring 92, about the pawl 86 to keep in engagement with the ratchet teeth 76.

The trigger body 90 is pivotably held on the inner surface of the flange 52 of the guide body 32 and is normally by a torsion spring 94 in a clockwise direction pressed. The trigger body is equipped with a nose part 96, an edge 98 formed by a recess 100 and a Ans eh I ag! 'Pool 102 provided, which on the side plate 28 and a further rotation of the release body ex ~ s in iJtirzeJ device via the position shown in FIG. 3 also prevent t.2 09840/00 78

When the drive 34 is moved from the position shown in FIG. 3 to the right into the working position shown in FIG. 6 is, the shoulder 88 of the body 84 strikes against the edge 98 of the trigger body 90. Since the stop surface 102 is a Prevents rotational movement of the release body, this has the consequence that the locking body 84 turns counterclockwise. direction against the tension effect of the spring 92 twisted. The pivoting movement of the bending body leads to the pulling out of the pawl 86 from the pawl teeth 76. The control bodies 6β

As a result, k and 70 are released and can pivot counterclockwise into the position shown in FIG. 4 under the action of the spring 82. When the control bodies are rotated in this way, the cam or projection of each of the control edges 74 drives the bearing blocks and the pressure roller carried by them down to a certain pressure position spaced from the pressure abutment. The machine is also provided with an adjustable feeler pad 23 which is rigidly arranged on the pressure abutment 16. A form to be printed is placed over the pressure elements located on the pressure bearing and the sensing pad, as can be seen from FIGS. 3 and 4 of the drawings. When the platen moves down, it hits

Ψ open the form and press it against the feeler pad. Since the feeler pad is rigid, the downward movement of the pressure roller is arx-eticrt under the action of spring 82, with the form being compressed between the pressure roller and the pad. Depending on the thickness of the form, sensed by the pressure roller ¹ acting on the form and on the sensing pad, this is arranged at a greater or lesser distance from the pressure abutment. In each case the pressure roller is brought into a suitable printing position which is selected from several possible positions determined by the thickness of the form being scanned.

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The feeler pad is adjustable so that it is at a suitable height with respect to the pressure elements on the pressure abutment is movable «, one obtains in this way an optimal condition for the position of the form in relation to the upholstery sensing pressure roller in order to be able to produce high-quality, dense prints on the form. When the feeler pad is aligned in a suitable position, it is locked in this position, so no further adjustment is required while the machine is in operation.

During and after the initial movement of the drive out of its home position, the platen is lowered to the sensing position shown in Figure k. The further movement of the drive enables the shoulder SS of the locking body 84 to pass the release body 90, the spring 92 turning the locking body clockwise in order to allow the pawl 86 to engage the pawl teeth 76 according to FIG. The pawl holds the control element in this position and the pressure roller in the appropriate printing position while the drive covers the rest of the printing path.

The release body 90 thus represents a device for moving the lying body 8h from the locked position into the unlocked position shown in FIG. 4. A physical, lateral movement is preferably used to release the locking body from the release body and to move it into the locking position shown in FIG. Although the device shown can be defined in such a way that it displaces the locking body from the locked position to the unlocked position when the pressure roller is moved to the particular printing position, other electromechanical means can also be used to drive the drive device and the pressure roller

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to lock before any further movement takes place. The said device can consequently also be viewed as a means to remove the locking device from dear to relocate unlocked to the locked position when the platen is moved to the specified printing position.

The pawl 86 can engage in each of the claw teeth 76, which depends on the position of the control bodies 68 and 70 depending on the thickness of the form to be printed. Thus, the distance between opposing ratchet teeth * and the size of the teeth can have any suitable dimension. Ratchet teeth, in which a movement between teeth following one another leads to a corresponding deflection of the pressure roller of 0.02 μm or 0.0 μm, have proven to be particularly suitable.

When the drive 3 ^ reaches the working position shown in Fig. 6, the shell SO on the Stouerkörx> er 68 comes into contact with a control surface 104 attached to the side plate 30. A further movement of the drive has the consequence that the Bolle runs downwards along the control surface and rotates the control elements 68 and 70 in a clockwise direction against the tension of the spring 82. During the pivoting movement of the control body, the dwell zone at each of the control edges lh is placed against the bearing blocks 56 and 58, while the springs 64 and 66 press the pressure roller 36 upwards into its raised position. Even during the pivoting movement of the control bodies, the locking body 86 only runs empty over the pawl teeth 76 until they engage the first tooth of the pawl according to FIG.

At this point the print cycle is complete and the platen 36 is in its raised position above the Form held to the drive in the starting position

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traced back. If the data logger matches the im US Patent No. 3 j-38 091 corresponds to the type described, the print head 12 is initially moved into the open position upon completion of the printing cycle. Then will the drive is returned to its original position. In the case of a data logger with a fixed head, straight US Patent No. 3 OIS 725 puts the drive in the home position returned while the pressure roller is raised Position to prevent double printing or smearing of the form. In each In this case, the print roller is moved back into the raised position after completion of a print cycle.

When the drive 34 approaches the home position, lies the approach 88 of the latch body 84 on the nose part 96 of the release body 90 and rotates it counterclockwise as seen in Fig. 7 of the drawings. The pawl 86 remains in engagement with the ratchet teeth 76 under the influence of the spring 92. The further movement of the drive in the The starting position leads to the projection 88 being introduced into the recess 100. The spring 94 pivots Release body now directed in the opposite direction into the position shown in FIG. 3. In this position are the parts in a neutral starting position, ready to carry out another printing cycle.

From the description it can be seen that the invention provides a new type of pressure roller compensation device designed to produce high quality prints on forms of various thicknesses. The compensation resp. Compensating device sets the pressure roller in the appropriate printing position, depending on the sensed thickness of the form to be printed happens. There is no need for independent input carried out by the operator.

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setting of the platen pressure position from a form of a certain thickness to another form of different Thickness. Except for the advantages, which are made possible by the ease of use granted to the operator the high quality imprints that can be achieved by the device according to the invention are given, the device can geraüss of the invention also readily installed in various types of already existing printing machines and used therein will.

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Claims (7)

PATENT CLAIMS: i.J printing machine for printing various forms Thickness with the help of pressure elements, using a pressure platen and a drive, which during the Printing process across the platen from a starting position can be moved into a working position, characterized in that a pressure roller (36) on the carriage (34) arranged and between a raised position above the pressure abutment (l6) and a pressure position below lower Distance with respect to the platen is movable, the printing position from a plurality of possible printing positions it is determined that the drive (34) has an actuating device (68, 70; 82) is provided, which the pressure roller (36) from its raised position in a certain The pressure position lowers that a locking device (84) can be displaced between a first position and a second position is, wherein in the first position it locks the actuating device and, as a result thereof, a pressure roller movement in the direction of the pressure abutment (l6), while in the second position the actuating device releases that a release device (90) the locking device (84) from the first to the second position during and according to the initial movement of the drive displaced from its starting position, and that a device (92) the The locking device is moved from the second position to the first position when the pressure roller is in the predetermined position Moving pressure position. - 16 2098A0 / 0078 2. The printing machine of claim 1 further characterized by means (80, 104) which support the platen when completed shift a print from the specific print position to the raised position. 3. Printing machine according to claim 1, characterized in that bearings (56, 58) are movably guided in the drive (34), to support the print roller (36) when moving between the raised position and the selected print position, that the bearings are held in contact with the actuating device (68, 70) by means of a clamping device (64, 66) in order to move the Normally push the platen to the raised position, and that means (82) opposed to the tensioner and are effective in accordance with the actuating device in order to close the bearings when the pressure roller is in the raised position move, whereby the bearings are movable by the actuating device to the pressure roller in the specific printing position to adjust. 4. Printing machine according to claim 1, characterized in that the ratchet teeth (76) are integral with the actuator W device (68, 70) consist that a pawl (86) is assigned to the locking device (84) and cooperates with the pawl teeth (76), and that elastic means (92) normally brace the locking device in the first position around the pawl in engagement with the ratchet teeth, whereby when the locking device (84) is moved into the second position, the pawl (86) is released from its engagement with the ratchet teeth in order to unlock the actuating device, while the pawl (86) when the Locking device comes into the first position under the influence of the elastic means in engagement with the ratchet teeth in order to lock the actuating device when the drive is moved during a print. 209840/0078 -17- 5. Printing machine according to claim 1, characterized in that that a form on the platen (16) is held above the pressure elements, that a feeler pad (23) below part of the form is arranged on the platen, whereby the platen is raised when it moves out of its position Position on the form and presses it against the feeler pad (23), and that the movement of the pressure roller can be locked in its suitable printing position when the pressure roller is the thickness of the form part between the pressure roller and feel pads. 6. Pressure roller with compensating effect for printing forms of various thicknesses with the help of printing elements, characterized in that the pressure roller is spaced between a raised position, from the pressure elements and a printing position is movable, which determines in the printing position on the printing elements from several possible positions is that the pressure roller can be displaced from a starting position into a working position in order to produce the impression, when the pressure roller is in the desired printing position, that an actuating device removes the pressure roller from the raised position in the specific printing position that shifts a locking device between a first position and is displaceable to a second position, locking the actuating device in the first position and consequently a pressure roller movement in the direction of the pressure elements prevents a release device from being released while in the second position the actuating device is unlocked according to the initial movement of the pressure roller from its starting position is effective to the locking device to shift from the first position to the second position, and that means are effective to move the bolt direction off to shift the second position to the first position when the pressure roller is moved to the desired printing position. 1 ft 209840/0078 7. The platen according to claim 6 further characterized by means (80, 104) which support the platen when completed shift a print from the specific print position to the raised position. 208840/0078 Le first page