EP0013294B1 - Mehrfachtypenscheibendruckwerk für Schreibmaschine oder Drucker - Google Patents

Mehrfachtypenscheibendruckwerk für Schreibmaschine oder Drucker Download PDF

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Publication number
EP0013294B1
EP0013294B1 EP79103771A EP79103771A EP0013294B1 EP 0013294 B1 EP0013294 B1 EP 0013294B1 EP 79103771 A EP79103771 A EP 79103771A EP 79103771 A EP79103771 A EP 79103771A EP 0013294 B1 EP0013294 B1 EP 0013294B1
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EP
European Patent Office
Prior art keywords
print
wheel
printing
hammer
character
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79103771A
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English (en)
French (fr)
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EP0013294A3 (en
EP0013294A2 (de
Inventor
William Lee Dollenmayer
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International Business Machines Corp
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International Business Machines Corp
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Publication date
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Publication of EP0013294A2 publication Critical patent/EP0013294A2/de
Publication of EP0013294A3 publication Critical patent/EP0013294A3/fr
Application granted granted Critical
Publication of EP0013294B1 publication Critical patent/EP0013294B1/de
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/24—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being perpendicular to the axis of rotation
    • B41J1/28—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers
    • B41J1/30—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers with the types or dies moving relative to the carriers or mounted on flexible carriers

Definitions

  • the present invention relates to printers or typewriters of the serial type with printing wheel and more particularly, it relates to a machine comprising several coaxial printing wheels with tongues carrying radial characters and a single hammer.
  • Prior art series printers include those of the print wheel type with radial character tabs.
  • the print wheel is rotated to place a desired character tab in the print position.
  • a striking hammer is then actuated to apply the selected tab against the printing ribbon and the paper placed on a platen to effect the printing of the character.
  • the wheel, the wheel drive system and the hammer are generally mounted on a carriage which is moved along the printing line to print the characters in series.
  • These printers are often associated with character selection keyboards and in this case constitute typewriters. In the case of a typewriter, approximately one hundred different print characters are arranged on the print wheel and can be selected by pressing the keyboard.
  • These printing wheels generally have a diameter of the order of 7 to 9 centimeters, diameter dictated in part by the number of characters to be carried by the wheel.
  • special characters such as, for example, Greek characters or mathematical symbols.
  • the operator must replace the element or print wheel bearing the conventional characters with a print wheel bearing the special characters which it is desired to print.
  • the printing element bearing the classic characters must be replaced again to continue printing the normal text.
  • the print wheel must be changed during the automatic reproduction operation. To avoid this, it would therefore be advantageous to be able to have special characters or sets of characters on the same print wheel.
  • each character-carrier tab added to the print wheel causes its diameter to increase, and inherently, its inertia, which requires the use of drive and selection systems for the wheel, heavier and more expensive.
  • the carriage drive systems also become heavier in order to be able to drive the increased weight wheel selection and drive systems.
  • an increase in the number of characters on the wheel causes longer access times to the characters and therefore, reduces the operating speed of the printer, more particularly when it is used in automatic reproduction mode.
  • the character selection logic and drive system become more complex and more expensive.
  • Another desirable characteristic of the typewriter would be that it can exceptionally print large characters used for example for printing notes to be displayed on a board, speeches to be read in public or documents for people with vision scaled down. Large characters occupy a large area on the printing wheel and therefore lead to the use of wheels with increased diameter, weight, inertia and price and at a slower selection speed, as indicated above.
  • One of these solutions consists in providing a printing element comprising at least two wheels situated in parallel planes, integral with each other, made of a material thin elastic band and each provided with radial tabs carrying the characters at their free end. These wheels are angularly offset so that each tongue of one is placed between two tongues of the other or others.
  • the number of characters available on such a printing element is therefore at least twice greater than that available on a single wheel and this result is obtained without a significant increase in the diameter of the wheels.
  • this printing element of the prior art has a much greater inertia than that of a single wheel because the wheels which constitute it are fixed on the same hub and therefore always rotate together when the characters are selected. Furthermore, the number of characters being at the periphery of such an element being equal to the product of the number of characters on a single wheel, by the number of wheels used, it follows that the logic of selecting characters which would normally be used to select the characters on a single wheel element, can no longer be used to select the characters on the multi-wheel element, since the latter rotate simultaneously, which increases the number of angular positions to be decoded.
  • the printing assembly according to the present invention makes it possible to eliminate the drawbacks indicated above which affect the devices of the prior art and to produce a printer capable of printing selected characters from a large set of characters. or large characters, without significantly slowing down the printing process or excessively increasing the weight and cost of the printing device.
  • the printing assembly according to the present invention is of the type described in the aforementioned document FR-A-2186890, namely that it comprises a first and at least a second printing wheel each comprising a plurality of character-carrying tabs radial.
  • the device according to the invention is characterized in that:
  • the first printing wheel has a tongue-free sector, dimensioned so as to allow the passage of the hammer, and is rotatably mounted on an axis so that each of the tongues can be selectively aligned with the printing position,
  • the second wheel has a tongue-free sector, dimensioned so as to allow the passage of at least one tongue of the first wheel, said second wheel being rotatably mounted on the same axis as that of the first wheel, so that each tongue of said second wheel can be aligned with the printing position,
  • Figure 1 is a perspective view of a typewriter or printer comprising the multi-wheel printing device of the present invention
  • the machine 11 comprises a printing device 13 and a cylindrical plate 15 on which is wound a printing receiving medium such as the sheet of paper 17 which is printed by the printing device 13.
  • the typewriter or printer 11 may also include a keyboard 19 which can be fixed to the front part of the chassis 21.
  • the chassis 21 carries an axis 23 on which the plate 15 is mounted.
  • the plate can be turned manually using a button 25 or automatically by a drive motor 26 coupled to a gear train 27.
  • Paper feed rollers 29 are disposed under the plate 15 and loaded by spring against the latter so that the rotary movement of the plate ensures the advancement of the sheet 17 upwards.
  • Conventional paperweight rollers 31 apply the sheet against the platen to facilitate printing.
  • the printing device 13 comprises a printing element 35, a hammer mechanism 37 and a printing ribbon 39, all of these elements being mounted on a printing element carriage 41.
  • the printing element print 35 includes a print wheel front 43 and a rear printing wheel 45 each composed of a plurality of radial printing tabs fixed to a central hub 46. Each of the tabs carries a symbol or character not shown.
  • the front printing wheel 43 has a sector or window 47 without tabs through which the hammer device 37 passes to apply a printing tab of the rear wheel 45 against the ribbon 39 and the paper 17.
  • the front wheel 43 When printing is provided by the rear wheel 45, the front wheel 43 is rotated so that its free sector 47 is aligned with the hammer device 37.
  • the rear printing wheel 45 is rotated by a motor selection 49 until the tab bearing the character which one wishes to print is aligned with the hammer device 37, the free sector 47 and the printing position on the paper 17.
  • the hammer device striking 37 is then actuated to cause the movement of the hammer (not shown) over a fixed distance through the free sector 47 and to apply the selected printing tab of the rear printing wheel 45 against the printing ribbon 39 and the paper 17 so as to ensure the printing of the selected character carried by the printing tab on the paper 17.
  • a free sector (not shown) of the rear wheel 45 is aligned with the hammer device 37 and the character of the front wheel 43 which it is desired to print is arranged adjacent to the hammer device 37, in alignment with the free sector of the rear wheel (not shown) and the printing position on the paper 17.
  • the hammer then applies the printing tab carrying the selected character, through the sector free from the rear wheel 45, against the printing ribbon 39 and the paper 17, to ensure printing.
  • the printing element 35 is offset on the printing shaft 51 of the selection motor 49 each time that a different printing wheel is selected in order to maintain constant the distance traveled by the print hammer and the tab selected to be applied against the paper 17.
  • the print element carriage 41 moves to the next printing position so that a line is printed in series.
  • a cable 52 is fixed to the carriage 41, wound around pulleys 53 and 55 and connected to a motor 56 which, through it, drives the printing element carriage 41 in the direction of printing or Line break.
  • the carriage 41 is mounted on two parallel support rails 57 and 59 which allow its movement.
  • FIG. 2 is a schematic illustration of a printing wheel system of the prior art, we see that it comprises a plate 15 on which is wound a sheet of paper 17, a device for striking hammer 37, a printing ribbon 39 and a printing wheel 65 provided with a hub 46.
  • the printing ribbon 39 is lifted and brought into its position shown in dotted lines and the hammer hammer device 37 is excited in order to cause the hammer movement 61 to the left to strike the selected printing tab and apply it against the printing ribbon 39.
  • the tongue and the printing ribbon then strike sheet of paper 17 and cause the selected character to be printed.
  • the print wheel can be rotated to select another character tab so that the next symbol can be printed during the printing cycle. next operation.
  • the printing element 35 comprises the front printing wheel 43 and the rear printing wheel 45.
  • the rear printing wheel 45 is rotated so that its sector without character tabs or window is aligned with the position printing. In this position, the rear print wheel is essentially arranged in the free space located directly under the print ribbon 39 and does not affect the operation of the front print wheel 43.
  • the front print wheel 43 is arranged exactly like the printing wheel 65 of FIG. 2 with respect to the plate 15 and to the hammer hammer device 37 and the printing is carried out in the same way. To make the selection of characters during successive printing cycles, the front printing wheel 43 is rotated while the rear printing wheel 45 remains fixed in the position described.
  • FIG 4 there is a schematic illustration of the coaxially mounted multiple print wheel system of the present invention when it is offset on its axis.
  • the front printing wheel 43 has been rotated so that its free sector is aligned with the hammer device 37 and the printing position.
  • the printing element 35 has been offset axially in the direction indicated by the arrow 67 from its position in FIG. 3, by a distance corresponding to the distance separating the front wheel 43 from the rear wheel 45.
  • the wheel 45 has been rotated 180 ° from its position in Figure 3 in order to prepare for the selection of any particular printing tab.
  • the actuation of the hammer striking device 37 causes the hammer 61, which is now disposed in the free sector of the front wheel 43, to strike a selected character tongue of the striking wheel. print 45 against the print ribbon 39 and the paper 17.
  • the selection of the print characters for the rear wheel 45 is carried out by turning the rear wheel 45 while maintaining the front wheel 43 in a fixed position.
  • the distance between the hammer device 37 and the printing wheel used for printing remains constant.
  • the distance between the selected printing tab and the printing ribbon 39 as well as the distance between the selected printing tab and the plate 15 remain constant.
  • the same hammer device 37 as that used in the machines of the prior art, could be used with the present invention.
  • the character selection device of the prior art could also be used since the number of printing tabs and their relative positions on each of the printing wheels 43, 45 could be similar to the number and relative positions of the tabs of the printing wheel 65 of the prior art.
  • FIG. 5 is a side sectional view of the print wheels mounted on the print shaft when printing is done from the rear print wheel.
  • the two printing wheels 43 and 45 are made of flexible plastic material used for the manufacture of printing wheels of the prior art such as that used in the QUME Q series printers manufactured by QUME Corporation of Hayward, California, USA.
  • the two printing wheels 43 and 45 are made integral by a crown 73 of the hub of the rear printing wheel 45 which fits into an annular groove 75 of the hub of the front printing wheel 43. This arrangement allows the relative rotation of the printing wheels while allowing, if necessary, their manual separation, with the application of a force greater than that exerted during normal operation of the machine.
  • the printing element formed by the printing wheels 43 and 45 slides freely on the printing shaft 51.
  • a drive finger 77 is fixed to the printing shaft 51 and selectively engages in a slot axial 79 formed in the rear wheel 45 (see FIG. 6) when the printing element 35 is positioned for a printing operation carried out from the rear printing wheel.
  • the drive finger 77 engages in a similar slot (not shown) formed in the front printing wheel 43 when the printing element 35 is shifted to the left on the shaft 51, as seen on the Figure 5, to ensure a printing operation from the front print wheel 43.
  • the rotation of the print shaft 51 thus causes the rotation of the print wheel 45 via the finger drive 77 when the printing element 35 is in the position shown in FIG. 5.
  • An offset control arm 89 engages in an annular groove 91 formed in the front wheel 43.
  • the movement to the left of the offset control arm 89 causes the corresponding displacement of the printing element 35 on the shaft 51.
  • the printing element Once the printing element has been shifted, it can be returned to its extreme right position by the return of the shift control arm 89.
  • the printing wheels must be each placed in their rest position so that the drive finger 77 aligns with the axial slot 79 made in the rear wheel 45 and with a similar slot (not shown) made in the front wheel 43.
  • Figure 6 shows the print wheels viewed from the printer stage.
  • the rear wheel 45 is thus arranged over the front wheel 43 as seen in the figure and the two wheels are in the rest position, which allows the drive finger 77 to align with the axial slot 79 of the rear wheel 45 and with a similar slot (not shown) of the front wheel 43.
  • the free sector 47 of the front wheel 43 is of sufficient size to allow the passage of the striking hammer 61 of FIG. 3 and the printing from the rear wheel 45.
  • the free sector between the printing tabs 93 and 94 of the rear wheel 45 is substantially greater than the free sector 47 of the front wheel 43 to allow the positioning of the printing ribbon 39 of Figure 1 below the wheel 45, when the printing is carried out from the front wheel 43, (as has been said previously with reference to Figure 3). It will be noted that this free sector could be reduced if the ribbon was brought closer to the plate or kept constantly in the raised position.
  • the free sector must be of sufficient size to allow the selected printing tab of the front wheel 43 to pass through it to strike the platen
  • each wheel aligns the drive finger 77 with its associated slot.
  • the free sector of each printing wheel is aligned with the hammer and the printing position.
  • Figure 7 is a perspective view of the print element carriage and the selection system in the operating position.
  • the print element carriage 41 also carries a selection motor 49 in turn equipped with a shaft 51 on which the printing element 35 is mounted.
  • the selection motor 49 controls the angular position of the shaft 51 and therefore the positioning of a selected printing tab in the printing position.
  • the selection motor 49 When it is desired to remove the printing element 35 from the printing shaft 51 to replace it with a different printing element, the selection motor 49 is brought into rotation in its rest position, then tilted around of its tilting axis 101 (see also Figure 1) in the position shown in Figure 8.
  • the tilting axis 101 is fixed to the rear of the motor 49 and pivotally mounted in a U-shaped support 103.
  • a control handle 105 can be used by the operator to move the selection motor 49 and the printing element 35.
  • the pivot rod is caused to pivot. connection 107 towards the outside, around its pivot 109, which frees the locking surface 111 from the lock 113 which is fixed to the motor 49.
  • the spring 115 biases the slide 117 and pushes it down against the curved lip 119 ( see Figure 8) of the support 103, which causes the latch 113 to pass over the locking surface 111 of the connecting rod 107.
  • the slide 117 being pushed down, also urges a flat 120 of the collar 121 fixed to the printing shaft 51 and thus, blocks the printing shaft in the rest position.
  • the handle 105 is then pulled to the left as seen in FIG. 7 and urges the finger 122 fixed to the selection motor 49 to cause the selection motor 49 and the printing element 35 to pivot upwards around of the pivot axis 101 of the engine.
  • Figure 8 is a perspective view of the print element carriage and the selection mechanism in the operator loading position.
  • the printing element 35 of FIG. 7 has been removed from the printing shaft 51 to show the drive finger 77.
  • the fixed stop 87 is tilted forward.
  • the selection motor 49 bears on the surface 123 of the connecting rod 125 when it is in the operating position.
  • a spring (not shown) disposed on the pivot axis 127 biases the rear surface 129 of the fixed stop 87 to separate it from the selection motor 49.
  • an offset control arm 89 biases the printing member 35 of Figure 7 for. causing its axial offset on the printing shaft 51.
  • the movement of a solenoid plunger (not shown) against the surface 133 of the connecting rod 135 causes it to pivot around the pivot 137 and the tongue 139 to be lifted.
  • the upward movement of the tongue 139 which is integral with the offset control arm 89 causes the latter to pivot clockwise around the pivot 141 against the restoring force exerted by the spring 143.
  • This action causes the printing element 35 in FIG. 7 to move away from the motor 49 on the printing shaft 51.
  • the relaxation of the force exerted by the solenoid plunger on the surface 133 allows the spring 143 return the printing element 35 to its position closest to the motor 49.
  • the characters can be entered into the machine from the keyboard 19 in FIG. 1 or from other means for entering characters such as communication channels or storage devices such as magnetic media.
  • a keyboard it is desirable to place all the characters encountered in the preparation of conventional documents, on a single print wheel, for example the front print wheel 43.
  • the characters that are encountered less often such as for example, the Greek characters, can be placed on the second printing wheel which will be, in this case, the rear printing wheel 45.
  • all the characters will be selected from of the front print wheel, allowing for maximum print speed.
  • the second printing wheel is used. This second selection method is faster and easier to perform by the operator than the prior art method which consisted in changing the print wheel. Since most keyboards are designed to allow the selection of a hundred characters (using the shift key), it is necessary to add an additional code key to these classic keyboards in order to be able to select additional characters arranged on the second wheel or rear print wheel 45.
  • Figure 9 shows the flow of operations performed by the logic of the print wheel selection device of the present invention.
  • Pressing a key generates a CC character code representing a particular character tab of one of the two printing wheels 43 and 45 of FIG. 1.
  • This CC character code is applied to the decoding logic during step 151 and this logic delivers signals from output, which are applied to blocks 153 and 155, which respectively indicate whether the character in question is arranged on the front wheel 43 or on the rear wheel 45 of Figure 1.
  • the signals from blocks 153 and 155 are respectively applied to blocks 157 and 159 which respectively determine whether the character in question is on the front wheel presently in the printing position, or on the rear wheel presently in the printing position.
  • the selection logic is excited during step 161 and causes the rotary drive by the selection motor 49 of FIG. 1, of the printing wheel so that the tab bearing the selected character is aligned with the hammer device 35 of FIG. 1. Once this alignment is effected, the printing ribbon 39 is raised to the printing position and the hammer device 35 is excited to perform printing during step 163.
  • the printing element 35 is brought into its rest position during step 165.
  • the printing wheel selection logic is then excited, during step 167, to cause the offset of the printing element 35 of FIG. 1 on the printing shaft 51 so as to select the second printing wheel for its rotation drive.
  • the selection logic then causes, in step 161, the alignment of the selected printing tab with the printing position, as indicated above.
  • Figure 10 is a schematic representation of the print wheel selection control logic.
  • the print wheel selection control logic determines which of the wheels 43 or 45 of Figure 1 is selected for printing as well as which of the free sectors is aligned with the print position and the hammer.
  • the character code from a keyboard or any other input device is decoded to determine whether this character is on the front print wheel 43 or on the rear print wheel 45 of the Figure 1.
  • a signal called PPI representing the wheel currently in the printing position as delivered by a position lever 171 and a decoded character signal CD are applied to the wheel selection logic 173.
  • This logic is composed of simple elements combinatorial circuits which deliver an output signal indicating either that the correct wheel is in position for character selection, or that the position of the wheel must be changed.
  • the logic 177 may be identical to that used in current printers such as the QUME Q series printers.
  • Logic includes a character counter that maintains the current rotational position of the print wheel and a logic part, including storage flip-flops, which indicate the desired position of the selected character.
  • the motor 49 of Figure 1 which can be the same servo motor as that used in the QUME printer, is then rotated until the correct printing tongue is aligned with the hammer and the position printing.
  • An optical transducer delivers reaction pulses indicating the rotation of the servo system.
  • the logic controlling the hammer and the printing ribbon is identical to that used in the QUME Q series printers. This logic is represented by block 179.
  • the print wheel selection logic 173 indicates that the wheel must be changed
  • the currently selected print wheel is brought into the rest position by the logic block 181.
  • the print wheel can be brought back to the position of idle using the current position selection logic of the QUME Q series printer. This operation is accomplished by loading the idle position into the storage scales of the desired character positions, which causes the servo motor to rotate in rest position.
  • a neutralization signal is applied to the ribbon logic and the hammer logic to avoid the execution of a printing cycle.
  • a signal is delivered by the block 181 to the position latch 171 which also receives a reaction signal and a signal from the wheel selection logic d impression 173 indicating that the position of the wheel must be changed.
  • the position lever 171 is a bistable device which changes state when the wheel selection logic 173 and the wheel return logic in the rest position 181 deliver signals to it.
  • the position latch 171 changes state, it causes the application of a signal to the solenoid exciter 183 which, in turn, causes the stress on the surface 133 of the connecting rod 135 of FIG. 8 by a solenoid (not shown), causing the repositioning of the printing element 35 by the shift control arm 89.
  • the output signal of the position latch 171 is delayed by the circuit 185 to ensure positioning correct wheel before applying this signal to OR gate 175 and therefore to position selection logic 177. Once logic 177 has received this signal, it responds to the character coded signal by causing the rotation of the newly selected print wheel to its correct position. Then the printing hammer logic 179 controls the printing as described above.
  • printing element comprising two printing wheels with character-carrying tabs
  • additional printing wheels could be used in the same way to allow the printing of 'a greater number of characters, while retaining the benefit of maintaining or reducing the inertia affecting the print wheel selection device.
  • three printing wheels could be mounted on the printing shaft 51, each of them having a sector free of tongues and a corresponding stop being associated with each wheel.
  • the two unselected printing wheels would be arranged so that their free sectors are aligned with the striking hammer while the selected wheel would be rotated to align the tongue bearing the character to be printed with the striking hammer.
  • the print wheels would be offset axially to maintain a constant distance between the selected print tab, the hammer and the platen.
  • the currently disc-shaped printing member could be in the form of a cup.
  • the print tabs forming a cup would be mounted concentrically on a vertical print shaft. The vertical shaft would then be shifted to or from the stage depending on the selected printing element.
  • Each of these printing elements would have a tongue-free sector, that of the external printing element being dimensioned so as to allow the passage of the printing tabs and that of the interior printing element being dimensioned so to allow the passage of the hammer.

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Claims (9)

1. Druckeinheit (13) für Druckwerke (11) mit einer Schreibwalze (15), über die das Papier (17) geführt wird, einem Farbband (39), einem von der Schreibwalze (15) getrennten scheibenförmigen Druckelement (35) mit einer Vielzahl Typenträgerzungen, die zum Abdruck eines Zeichens gegen die Schreibwalze (15) angeschlagen werden, wobei das Druckelement (35) und die Schreibwalze (15) so angeordnet sind, daß sie zur Änderung der Druckposition in mindestens zwei Richtungen relativ zueinander verstellt werden können, mit einem Hammer (61), einem Betätigungsmittel (37, 179) für den Hammer (61), um die ausgewählte Typenträgerzunge in ihre Druckposition gegen die Schreibwalze (15) zu schlagen und das darauf angebrachte Druckzeichen auf das Papier (17) zu drucken, wobei das Druckelement (35) ein erstes Druckrad (43) enthält, das eine Vielzahl von an einer zentralen Nabe fest angebrachten, jeweils mit einem Druckzeichen versehenen radialen Zungen aufweist, und mindestens ein zweites Druckrad (45), das eine Vielzahl von an einer zentralen Nabe fest angebrachten, jeweils mit einem Druckzeichen versehenen radialen Zungen aufweist, dadurch gekennzeichnet,
daß das erste Druckrad (43) einen zungenlosen Sektor (47) aufweist, der derart bemessen ist, daß er den Durchgang des Hammers (61) ermöglicht, wobei das erste Druckrad (43) drehbar auf einer Welle (51) gelagert ist und jede der genannten Zypenträgerzungen selektiv in die Druckstellung eingestellt werden kann,
das zweite Druckrad (45) einen zungenlosen Sektor aufweist, der derart bemessen ist, daß er den Durchgang von zumindest einer Druckzunge des ersten Druckrades (43) gestattet, wobei das zweite Druckrad (45) auf der gleichen Welle (51) wie das erste Druckrad (43) drehbar gelagert ist. derart, daß jede Zunge des zweiten Druckrades (45) in die Druckstellung eingestellt werden kann. und daß außerdem ein Zeichenwählmittel (49. 51, 181, 83, 85, 87, 89, 133, 135, 173, 177) vorgesehen ist, um dasjenige der Druckräder, das nicht die jeweils ausgewählte Zunge enthält, selektiv zu drehen, um den zungenlosen Sektor, den es enthält, mit dem Hammer (61) in der Druckstellung auszurichten, und um dasjenige der Druckräder, welches die gewählte Zunge enthält, zu drehen, derart, daß die letztere mit dem Hammer (61) in der genannten Druckstellung ausgerichtet wird.
2. Druckeinheit nach Anspruch 1, dadurch gekennzeichnet, daß das Zeichenwählmittel enthält :
eine drehbare Welle (51) für den Drehantrieb der Druckräder (43, 45), wobei die Druckräder (43, 45) jeweils koaxial auf der genannten Welle (51) gelagert und axial verschiebbar auf derselben angebracht sind,
ein Schubmittel (89) zum axialen Verschieben eines gewählten Druckrades (43, 45) auf der Welle (51) von einer Ruhelage in eine Funktionslage und zum Verschieben des zweiten Druckrades von seiner Funktionslage in seine Ruhelage auf der genannten Welle (51).
3. Druckeinheit nach Anspruch 2, dadurch gekennzeichnet, daß die drehbare Welle (51) einen Mitnehmer aufweist, zum selektiven Eingriff in eine Nut (79) und zum Antrieb des in Funktionsstellung befindlichen Druckrades (43, 45).
4. Druckeinheit nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das Zeichenwählmittel außerdem einen Anschlag (83, 87) aufweist, der das in Ruhestellung befindliche Druckrad (43, 45) blockiert, während die Welle (51) das andere Druckrad in Umdrehung versetzt.
5. Druckeinheit nach Anspruch 4, dadurch gekennzeichnet; daß der Anschlag (83, 87) aus einem ersten Rastteil (83) besteht, welches das erste Druckrad (43) blockiert, wenn das zweite Druckrad (45) umläuft, und aus einem zweiten Rastteil (87), welches das zweite Druckrad (45) blockiert, wenn das erste Druckrad (43) umläuft.
6. Druckeinheit nach Anspruch 5, dadurch gekennzeichnet, daß jedes Druckrad (43, 45) an seiner Nabe eine Abflachung (81, 85) aufweist, die in Verbindung mit seinem Anschlag (83, 87) zur Sicherung des Blockierens benützt wird.
7. Druckeinheit nach Anspruch 2, dadurch gekennzeichnet, daß der zungenlose Sektor des zweiten Druckrades (45) den Durchgang des Farbbandes (39) gestattet, wenn sich das zweite Druckrad in Ruhelage befindet.
8. Druckeinheit nach Anspruch 2, dadurch gekennzeichnet, daß das erste Druckrad (43) und das zweite Druckrad (45) durch ihre Naben derart verbunden sind, daß sie relativ zueinander gedreht werden und auf der Welle (51) gemeinsam axial verschoben werden können.
9. Druckeinheit nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das erste und zweite Druckrad (43, 45) durch einen an der Nabe des einen Druckrades befestigten Ring (73) und eine entsprechende, in der Nabe des anderen Druckrades vorgesehene Ringnut (75) miteinander verbunden sind.
EP79103771A 1978-11-29 1979-10-03 Mehrfachtypenscheibendruckwerk für Schreibmaschine oder Drucker Expired EP0013294B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/964,569 US4197022A (en) 1978-11-29 1978-11-29 Multiple spoked wheel printer
US964569 1978-11-29

Publications (3)

Publication Number Publication Date
EP0013294A2 EP0013294A2 (de) 1980-07-23
EP0013294A3 EP0013294A3 (en) 1981-02-04
EP0013294B1 true EP0013294B1 (de) 1983-07-13

Family

ID=25508712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103771A Expired EP0013294B1 (de) 1978-11-29 1979-10-03 Mehrfachtypenscheibendruckwerk für Schreibmaschine oder Drucker

Country Status (10)

Country Link
US (1) US4197022A (de)
EP (1) EP0013294B1 (de)
JP (1) JPS5574882A (de)
AU (1) AU525426B2 (de)
BR (1) BR7907418A (de)
CA (1) CA1118698A (de)
DE (1) DE2965862D1 (de)
ES (1) ES486393A1 (de)
IT (1) IT1165366B (de)
ZA (1) ZA795797B (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357115A (en) * 1979-01-02 1982-11-02 Or Michael C P Printing system for multiple character languages and elements thereof
SE428662B (sv) * 1979-01-12 1983-07-18 Facit Ab Anordning for att vid tryckverk vid elektriska kontorsmaskiner losbart forbinda ett typelement med en motoraxel
US4552475A (en) * 1979-10-30 1985-11-12 Ricoh Co., Ltd. Printer carriage and hammer assembly
US4307968A (en) * 1979-11-28 1981-12-29 International Business Machines Corp. Font changing apparatus for daisy wheel printer
DE3014286C2 (de) * 1980-04-15 1982-12-23 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Druckvorrichtung mit einer motorgetriebenen Typenscheibe
IT1128802B (it) * 1980-06-05 1986-06-04 Olivetti & Co Spa Stampante seriale
US4389126A (en) * 1980-06-27 1983-06-21 Nippon Electric Co., Ltd. Serial impact printer having two printing modes
DE3209083C2 (de) * 1981-03-13 1986-08-14 Canon K.K., Tokio/Tokyo Druckwerk
US4494884A (en) * 1982-11-04 1985-01-22 Lowell Herman H Spoked multiple-wheel printer
JPS59104971A (ja) * 1982-12-09 1984-06-18 Canon Inc プリンタ
US5200892A (en) * 1984-01-17 1993-04-06 Sharp Kabushiki Kaisha Intelligent electronic word processor with plural print wheels and tables used to identify displayed characters supported by designated print wheels
DE3677090D1 (de) * 1985-08-14 1991-02-28 Canon Kk Drucker mit selbsttaetigem typenradwechsel.
US5350360A (en) * 1990-03-01 1994-09-27 Michigan Transtech Corporation Implantable access devices
US7606632B2 (en) * 2004-06-16 2009-10-20 Cryovac, Inc. Apparatus for dispensing activated monitoring devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1156226A (en) * 1911-08-15 1915-10-12 Alfred Herz Recording electric meter.
NL7009606A (de) * 1970-06-30 1972-01-03
US3892303A (en) * 1973-04-03 1975-07-01 Frederick P Willcox Type font changing mechanism and controls
DE2559008C2 (de) * 1974-12-28 1982-08-05 Ricoh Co., Ltd., Tokyo Antriebsvorrichtung für eine Typenscheibe
JPS5193632A (de) * 1975-02-14 1976-08-17
US4126400A (en) * 1975-09-12 1978-11-21 Ricoh Company, Ltd. Serial printing apparatus
JPS5264312A (en) * 1975-11-21 1977-05-27 Oki Electric Ind Co Ltd High speed printer
JPS52134513A (en) * 1976-05-01 1977-11-10 Ricoh Kk Petal type printing wheel

Also Published As

Publication number Publication date
AU525426B2 (en) 1982-11-04
EP0013294A3 (en) 1981-02-04
CA1118698A (en) 1982-02-23
US4197022A (en) 1980-04-08
ES486393A1 (es) 1980-05-16
ZA795797B (en) 1980-10-29
DE2965862D1 (en) 1983-08-18
IT1165366B (it) 1987-04-22
JPS5574882A (en) 1980-06-05
IT7927151A0 (it) 1979-11-09
AU5219679A (en) 1980-05-29
EP0013294A2 (de) 1980-07-23
BR7907418A (pt) 1980-07-15

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