EP0013346B1 - Kassette für Typenscheibe - Google Patents

Kassette für Typenscheibe Download PDF

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Publication number
EP0013346B1
EP0013346B1 EP79104892A EP79104892A EP0013346B1 EP 0013346 B1 EP0013346 B1 EP 0013346B1 EP 79104892 A EP79104892 A EP 79104892A EP 79104892 A EP79104892 A EP 79104892A EP 0013346 B1 EP0013346 B1 EP 0013346B1
Authority
EP
European Patent Office
Prior art keywords
cartridge
cartridge according
opening
leaf spring
printing
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
EP79104892A
Other languages
English (en)
French (fr)
Other versions
EP0013346A1 (de
Inventor
Adolph Broaddus Habich
Ronald Eugene Hunt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lexmark International Inc
Original Assignee
International Business Machines Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0013346A1 publication Critical patent/EP0013346A1/de
Application granted granted Critical
Publication of EP0013346B1 publication Critical patent/EP0013346B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • B41J1/246—Cartridges for the carriers

Definitions

  • the present invention relates generally to printers of the type with a printing wheel with radial character tabs and more particularly, a cartridge which can contain such a printing wheel both during its storage and its use in a printer.
  • a cartridge for a print wheel with character-carrying tabs comprises a housing containing a printing element and intended to be placed on a printer carriage with minimal operator intervention.
  • the housing has a central opening in its front face, allowing a drive hub controlled by a selection motor to access the printing element and a cutout in its upper front part to allow passage of a hammer.
  • the rear of the cartridge has a flexible retaining blade which also functions as a reach for the printing element.
  • This cartridge does not almost completely enclose the print wheel, as its rear side is wide open to clear the entire print wheel. Only the flexible blade masks part of the rear face of the wheel.
  • no means is provided for locking the wheel relative to the cartridge in a desired angular position that is invertible when the cartridge is not in use.
  • Document US-A-4 124 312 describes a cartridge for a print wheel with radial card-holder tabs.
  • This cartridge has a front face, side faces and a rear face connected to the side faces to form a housing almost completely enclosing the wheel.
  • the front face of the cartridge has a circular opening in which the circular hub in relief of the printing wheel is normally housed.
  • a spring placed in the cartridge rests on the rear face of the latter as well as on the print wheel in order to normally push the wheel hub into the circular opening of the front face.
  • the subject of the invention is a cartridge of the type described in document US Pat. No. 4,124,312, but which is intended to contain a removable printing wheel with tongues carrying radial characters having an element of angular orientation in relief.
  • the cartridge according to the invention comprises a front face, lateral faces, a rear face, which define a substantially closed housing for the printing wheel.
  • the front face has a positioning opening for the printing wheel and a flexible element, situated inside said housing and extending towards said positioning opening, recalls the printing wheel towards the front face of the. cartridge, when the wheel is present in the cartridge.
  • the cartridge according to the invention is characterized in that said housing has an opening in its bottom for the introduction and the withdrawal of the printing wheel, retaining means being provided on said rear face for retaining the flexible element, said positioning opening being an angular orientation opening which has an asymmetrical shape, as a whole, corresponding to that of the angular orientation element in relief of the printing wheel, so that, during engagement of the latter, in said opening, the print wheel is locked relative to the cartridge in a desired invariable angular position.
  • FIG. 1 the cartridge is referenced 1, the printing wheel 2 and the drive hub of the selection motor 3. Only the cartridge is part of the invention claimed below.
  • the cartridge 1 containing the printing element 2 is introduced into a printer which has a driving hub 3 for driving the element 2 in rotation.
  • the motor Before this assembly, the motor must however be removed or tilted to leave sufficient free space in the region of the printing device, allowing the operator to change or install the printing element. Even in this case, the space freed up is not important and the operation can prove to be very messy. Even after these disassembly and reassembly operations have been carried out, the simple manipulation of the printing element which has been removed from the machine can be very messy.
  • the cartridge of the present invention is designed so as to be able to contain a printing element and to be removably mounted in a printer carriage so as to substantially reduce the problems indicated above. Without taking into account the problem specific to the removal of the motor, the space to be freed for the introduction of the cartridge is no longer a critical factor since the cartridge containing a printing element is designed to be introduced vertically into a printer. In addition, since the printing element is almost entirely contained in the cartridge, changing the cartridge is no longer a messy operation.
  • the housing 4 has a front face 6 in which are formed a positioning opening 7 and a cutout 8 for the passage of a hammer.
  • the front face 6 is arranged opposite a printing device which comprises a selection motor and a striking hammer carried by a printer carriage.
  • the cutout 8 allows the passage of the hammer which is used in a well known manner to ensure printing.
  • the positioning opening 7 is somewhat in the shape of an arrow head and is formed approximately in the center of the face 6. The opening 7 cooperates with the printing element 2 to ensure and maintain an appropriate positioning of the printing element 2 when the cartridge is not in use, as will be described later.
  • the cartridge 1 has an open bottom used for introducing and removing the printing element 2.
  • cut corners 13 and 14 and the corresponding cut corners of the rear face 5 have two functions. First of all these cut corners reduce the weight of the cartridge that is carried by the printer carriage during printing operations. Then, they guide the cartridge in its housing in the carriage when said cartridge is introduced into the machine.
  • the upper part of the front housing 4 has two ramp sections 16 and 17 starting from the recesses 11 and 12 and converging towards the raised central part of the housing 4 in which the cutout 8 is formed which has lateral sides 18 and 19 and a lower side 20.
  • the dimensions of the cutout 8 are such that they allow the passage of a striking hammer during printing, but practically prevent any manual contact of the printing element 2 by the operator.
  • the ramp sections 16 and 17 protect the upper part of the printing element 2 when it is housed in the cartridge and ensure the best possible vision of the writing line.
  • the housing 4 carries the ribbon guide 21 which can be produced from a suitably shaped metal rod. Passing momentarily to FIG. 3, it can be seen that the housing body 4 has supports 22 and 23 in which the ends of the ribbon guide are fixed.
  • the ribbon guide 21 guides the printing ribbon during the passages of this last towards its high or low position relative to the blank 8 during the printing operations.
  • a paper guide screen 24 is integral with the upper part of the rear face 5.
  • a printing window 25 is centered horizontally in the paper guide 24 and aligned with the cutout 8.
  • the window 25 must be arranged so that it can be aligned with the platen of the printer and must have a sufficient width to, when executing printing operations on the fly, allow the rebound of a print character tab without it comes into contact with one side of the window 25. While satisfying these requirements, the window 25 must be of sufficiently small dimensions to limit the operator's access to the printing element 2.
  • the front face 6 and the rear face 5 are sufficiently close together to limit the operator's access to the printing element 2 from the top or from the bottom of the cartridge 1. Therefore, when the printing element 2 is housed in the cartridge 1, the only part of said printing element that can be touched by the operator during normal handling of the cartridge is the part accessible through the opening 7.
  • the printing element 2 which, as indicated above, is intended to be housed and drives in rotation in the cartridge 1 during the printing operations.
  • the printing element 2 When it is rotated, the printing element 2 is placed midway between the front 6 and rear 5 sides of the cartridge 1.
  • the printing element 2 consists of a central hub 26 to which are attached radial tabs or petals 27 which bear at their outer ends printing characters 28 used for printing in a well known manner.
  • the characters 28 of the tabs 27 are arranged on the printing side of the element 2.
  • the opposite side is the impact side.
  • the structure of the tongues 27 is such that it allows them to be struck by a striking hammer.
  • the central hub 26 is in the form of a circular cup having a peripheral rim 55 to which the tongues 27 are attached.
  • the hub 26 has, on its convex face, a raised element 29 ensuring the correct positioning (or orientation) of the element 2.
  • This relief element 29 is therefore on the impact side of the element 2, surrounds its axis of rotation and its periphery is in the shape of an arrowhead and corresponds to the shape of the opening 7 of the cartridge 1.
  • the element in relief 29 can fit into the opening 7.
  • the asymmetrical shapes of the element in relief 29 and the opening 7 ensure the installation of the element 2 in the cartridge 1 in the appropriate angular position.
  • a circular recess 30 is formed in the relief element 29.
  • the axis of rotation of the element 2 passes through the center of this recess, the bottom of which is formed by the hub 26.
  • This recess 30 also has a radial extension 43 At the center of the recess 30, there is a ring 31 with an inner bowl 32 having a bottom 33.
  • the bowl 32 is centered on the axis of rotation of the element 2 (see FIG. 6) and is deeper than the 'depression 30.
  • the cup 32 is intended to receive the drive shaft of a selection motor which passes through the hub 3 to center and avoid the buckling of the element 2 in a manner which will be described in detail later.
  • the drive hub 3 is formed by a cylinder 34 with a flange 35.
  • a central passage 36 in the shape of a D passes axially through the cylinder 34 and the flange 35.
  • the passage 36 receives the drive shaft 37, of corresponding shape, from a selection motor.
  • the shape of the passage 36 and of the shaft 37 allows the latter to rotate the hub 3.
  • the hub 3 can be glued to the shaft 37. If the fitting of the shaft 37 in the passage 32 is sufficiently tight and sufficiently deep, the element 2 is stabilized in a radial direction perpendicular to its axis of rotation. In other words, any risk of the element 2 becoming clouded is considerably reduced. Since the front 6 and rear 5 faces of the cartridge are very close together, any warping of the element 2 on the shaft 37 would cause wear, breakage and braking when the said printing element rotates.
  • the flange 35 carries a radial arm 39 which itself carries at its outer end a drive finger 40 designed to be housed in the hole 41 ( Figure 2) formed in the element 2.
  • the hole 41 is formed in the end of the extension 43 of the recess 30 and passes through the element 2.
  • the finger 40 introduced into the hole 41, when the hub 36 is rotated by the shaft 37, causes the element 2 to be rotated
  • the finger 40 and the hole 41 are of corresponding shapes, that is to say with two straight sides connected by two parts in an arc.
  • the width of the hole 41 is only slightly greater than that of the finger 40 in order to reduce the clearance between the element 2 and the hub 3 during the driving in rotation of the element 2 by the hub 3. However, in order to compensate for variations in tolerances, the height of the hole 41 somewhat exceeds that of the finger 40.
  • the flat sides of these two elements constitute sufficient driving contact surfaces making it possible to reduce wear and indentation.
  • the rigidity of the arm 39 is increased by the rib 42.
  • the extension 43 of the depression 30 is wide enough to receive, without friction, the rib 42.
  • the outer diameter of the collar 35 is greater than the inner diameter 44 of the recess 30.
  • the surface 45 of the collar 35 bears against the surface of the element in relief 29 to ensure radial alignment and stabilization of element 2 in order to further reduce the risks of travel.
  • Good contact between the surface 45 and the corresponding surface of the raised element 29 is facilitated by the spring 48 which applies the element 2 against the hub 3. the function of the spring 48 will be described in more detail below.
  • the hub 3 must not be fitted further onto the shaft 37 from the end 38 of the latter, in order to prevent said end 38 from being in contact with the bottom of the bowl 32 of the element 2. If this were not the case, full contact of the surface 45 and of the corresponding surface of the element in relief 29 could not take place.
  • the outside diameter of the flange 35 is larger than the inside diameter 44 of the recess 30, the flange 35 is still small enough that the hub 3 can pass freely through the opening 7 of the cartridge 1 when it is correctly positioned in relation to the printing element 2.
  • the shape of the recess 30 has the effect of reducing the weight of the element 2.
  • the internal part of the collar 35 is hollowed out to reduce the weight. Any reduction in weight results in an improved response time with regard to starting and stopping the rotation of element 2.
  • FIG. 2 shows the rear face or printing face 56 of the printing element 2.
  • the rear face 56 carries a pin 46 placed at the center of the recess 47 of the hub 26.
  • the pin 46 extends slightly beyond the plane of the tongues 27 and is designed to operate in association with the spring 48 placed in the cartridge 1 ( Figures 1 and 3)
  • the pin 46 is composed of a cylindrical part 49 ending in a spherical section 50.
  • the spherical section 50 acts as a bearing for the element 2 against the flexible blade or spring 48 during the rotation of the element 2.
  • the spring 48 bears against the spherical section 50 and maintains the element 2 in locked condition in the cartridge 1.
  • the spring 48 is a flexible blade with a curved central part 51 oriented towards the opening 7 and facing the latter. This curved part 51 bears against the interior surface of the front face 6 of the cartridge.
  • the rear face 5 has a rectangular recess 52 which receives and maintains the spring 48 in a desired position relative to the opening 7. That is to say that the spring 48 will remain in place and oriented correctly both when it is curved as shown in the figures and when it is loaded and deformed by the printing element contained in the cartridge 1 between the spring 48 and the front face 6.
  • the ends 57 and 58 of the spring 48 are housed in the recess 52 and rest on the inner surface of the rear face 5.
  • the recess 52 is long enough to receive the spring 48 when the latter is loaded and deformed by the printing element and the spring 48 is sufficiently long to ensure gradual crawling.
  • the ends 57 and 58 are retained in the recess 52 by the contact between the front face 6 of the cartridge and the curved part 51 of the spring 48.
  • the orientation and the length of the spring 48 and the extent of the part curved 51 are such that the spring 48 acts as a ramp for the spherical end 50 of the stud 46 of the element 2, in order to guide the element in relief 29 towards the opening 7 during the introduction of the element 2 in cartridge 1.
  • the force exerted by the spring 48 must be surpassed.
  • the spherical end 50 of the pin 46 moves on the curved part 51.
  • the end 57 of the spring 48 being housed in the depression 52, there will be no attachment between the part 50 and the end 57.
  • the spring 48 pushes and guides the element 29 in the opening 7.
  • the element 29 engages in the opening 7 this causes the locking of the element 2 in the desired orientation or angular position in the cartridge 1.
  • the assembly of print formed of the element 2 and the cartridge 1 is ready to be used on a printer or stored.
  • the width of the spring 48 is of great importance for the introduction of a printing element into an empty cartridge.
  • the width of the spring 48 must be sufficient to prevent the passage of a printing tab 27 through the opening 7 during the introduction of the element 2 into the cartridge 1. If the spring 48 is comparatively narrow with respect to at the opening 7, the tongues may be offset from the plane of all the tongues. To eliminate this risk, the spring 48 of the embodiment illustrated here is wider than the opening 7. This allows all the tongues adjacent to the opening 7 to remain in the same plane.
  • the orientation of the spring 48 relative to the tongues 27 is also important. Indeed, since the tongues 27 are arranged radially, there will be no attachment between them and the spring 48 if the latter is oriented parallel to the direction of introduction of the element 2 into the cartridge .
  • the cartridge 1 in which the element 2 is locked is inserted into the housing provided for this purpose in print wheel printers. Then, the drive hub 3 and the selection motor and the shaft which are connected to it are brought to the central hub 26. The shaft 37 enters the bowl 32, the finger 40 in the hole 41 and the surface 45 comes into contact with the surface of the element in relief 29. The continuation of the movement of the hub 3 in the same direction will cause the vertical extension of the ends 57 and 58 of the spring 48 by the spherical end 50 of the stud 46 of the element 2. Finally the element in relief 29 will be released from the opening 7 and the element 2 will thus be unlocked so as to be able to rotate in the cartridge 1. During the rotation of the element 2 for selection and printing operations , the arm 39 and the finger 40 are arranged in the cartridge 1 and the spring 48 acts as a bearing for the spherical end 50 of the stud 46.
  • the cup-shaped structure of the central hub 26 has a number of advantages.
  • One of these advantages is due to the design of the arrangement presented here and consists in the fact that the printing element 2 taken as a whole can be relatively thin while resisting warping.
  • the thickness of the central hub 26, apart from the raised element 29 and the pin 46 can be essentially equal to the total thickness of the element 2.
  • Another advantage lies in the fact that the element relief 29 is brought closer to the positioning opening 7. This reduces the risk of interference between the rest of the printing element 2 and the cartridge 1.
  • the rest of the printing element 2 is separated from the spring 48 during the rotation of the element 2.
  • the relief element 29 is pressed with the thumb to cause the element 2 to be unlocked and a downward movement is exerted. If the lower part of the external periphery of the element 2 is relatively close to the bottom 15 of the cartridge when the element 2 is locked in it, a very slight downward movement of the element is sufficient to provide a zone sufficient operator input.

Landscapes

  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Claims (14)

1. Kassette (1) zur Aufnahme eines abnehmbaren, mit radialen Typenfingern (27) versehenen Typenrades (2), mit einem kantigen, erhabenen Orientierungselement (29), bestehend aus:
- ein durch eine Vorderwand (6) und Seitenwände (9, 10) gebildetes Gehäuse (4), wobei die Vorderwand eine Einstellöffnung (7) für das Typenrad (2) aufweist,
- eine Rückwand (5), die mit den Seitenwänden (9, 10) verbunden ist, um ein im wesentlichen geschlossenes Gehäuse zu bilden,
-ein biegsames, im Innern des Gehäuses befindliches Element (48), das sich bis zu der Einstellöffnung (7) erstreckt, um das Typenrad (2) an die Vorderwand (6) der Kassette (1) zu drücken, wenn es sich in derselben befindet,

dadurch gekennzeichnet, daß das Gehäuse am Boden (13, 14, 15) eine zum Einschieben oder Herausnehmen des Typenrades (2) dienende Öffnung aufweist, die Rückwand (5) mit Stützmitteln (52) für das biegsame Element (48) ausgerüstet ist, und die Einstellöffnung (7) eine kantige Orientierungsfläche darstellt, die im wesentlichen eine dem erhabenen kantigen Orientierungselement (29) entsprechende unsymmetrische Form besitzt, so daß, wenn letzteres mit der Offnung (7) in Eingriff kommt, das Typenrad (2) in der Kassette (1) in einer gewünschten, unveränderlichen Eckstellung einrastet.
2. Kassette nach Anspruch 1, dadurch gekennzeichnet, daß die Einstellöffnung (7) in der Mitte der Vorderwand (6) angebracht ist.
3. Kassette nach Anspruch 2, dadurch gekennzeichnet, daß sich im oberen Teil der Vorderwand (6) ein Ausschnitt (8) für den Druckhammer befindet.
4. Kassette nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie eine mit dem oberen Teil des Gehäuses (4) fest verbundene Bandführung (21) einschließt.
5. Kassette nach Anspruch 4, dadurch gekennzeichnet, daß das Gehäuse (4) innere Halterungselemente aufweist, in denen die Bandführung (21) befestigt ist.
6. Kassette nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sie eine mit dem oberen Teil der Rückwand (5) fest verbundene Papierführung (24) aufweist.
7. Kassette nach Anspruch 1, dadurch gekennzeichnet, daß die Stützmittel (52) aus einer auf der Innenseite der Rückwand (5) befindlichen Vertiefung bestehen.
8. Kassette nach Anspruch 7, dadurch gekennzeichnet, daß das biegsame Element (48) aus einer Blattfeder besteht, die in Richtung Einstellöffnung eingebogen ist und deren Enden in der Vertiefung gehalten werden.
9. Kassette nach Anspruch 8, dadurch gekennzeichnet, daß die Vorderwand (6) und Rückwand (5) so nahe beieinander liegen, daß die Innenseite der Vorderwand (6) sich an den eingebogenen Teil der Blattfeder (48) anlegt, um die Enden derselben in dieser Vertiefung zu halten.
10. Kassette nach Anspruch 9, dadurch gekennzeichnet, daß die Vertiefung lang genug ist, um die Enden der Blattfeder (48) aufzunehmen auch wenn diese durch das Einführen eines Druckelementes (2) in die Kassette (1) verformt wird.
11. Kassette nach Anspruch 10, dadurch gekennzeichnet, daß diese Vertiefung und diese Blattfeder (48) parallel zu der Richtung verlaufen, in der das Druckelement (2) in die Kassette (1) eingeführt wird.
12. Kassette nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Blattfeder (48) breiter ist, als die Einstellöffnung (7).
13. Kassette nach Anspruch 12, dadurch gekennzeichnet, daß die Blattfeder (48) länger ist, als die Einstellöffnung (7).
14. Kassette nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß die Vorderwand (6) und die Rückwand (5) so nahe beieinander liegen, daß der Bediener nur durch die Einstellöffnung Zugang zu der Kassette (1) hat.
EP79104892A 1978-12-11 1979-12-04 Kassette für Typenscheibe Expired EP0013346B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/968,321 US4264221A (en) 1978-12-11 1978-12-11 Print element cartridge
US968321 1978-12-11

Publications (2)

Publication Number Publication Date
EP0013346A1 EP0013346A1 (de) 1980-07-23
EP0013346B1 true EP0013346B1 (de) 1981-12-09

Family

ID=25514069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104892A Expired EP0013346B1 (de) 1978-12-11 1979-12-04 Kassette für Typenscheibe

Country Status (9)

Country Link
US (1) US4264221A (de)
EP (1) EP0013346B1 (de)
JP (1) JPS605191B2 (de)
AU (1) AU527731B2 (de)
BR (1) BR7908073A (de)
CA (1) CA1122145A (de)
DE (1) DE2961565D1 (de)
ES (1) ES486350A1 (de)
IT (1) IT1163740B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465387A (en) * 1982-09-30 1984-08-14 Data Motion, Inc. Daisy wheel mounting apparatus
GB2135246B (en) * 1983-02-23 1987-05-13 Ricoh Kk Daisy wheel supporting structure
US4591282A (en) * 1984-06-29 1986-05-27 International Business Machines Corporation Drive mechanism for a ribbon disc
DE3606545C1 (de) * 1986-02-28 1987-04-16 Triumph Adler Ag Vorrichtung zum Kuppeln eines Typenrades mit einer Dreheinstellwelle in Schreib- oder aehnlichen Maschinen
US5098208A (en) * 1990-01-12 1992-03-24 Smith Corona Corporation Ribbon cassette with integral paper guide
US5074689A (en) * 1990-01-12 1991-12-24 Smith Corona Corporation Ribbon cassette with integral paper guide

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1172854A (en) * 1915-10-16 1916-02-22 Underwood Typewriter Co Type-writing machine.
FR2154985A5 (de) * 1971-10-01 1973-05-18 Honeywell Bull
US3887055A (en) * 1973-12-13 1975-06-03 Ibm Card holder
DE2414127A1 (de) * 1974-03-23 1975-10-02 Olympia Werke Ag Einrichtung zum wechseln eines mit einer kappe versehenen typenkopfes fuer schreiboder aehnliche bueromaschinen
US3926312A (en) * 1974-09-09 1975-12-16 Ibm Disk pack enclosure
US4124312A (en) * 1977-02-10 1978-11-07 Xerox Corporation Impact printer with print wheel cartridge
US4127335A (en) * 1977-02-10 1978-11-28 Xerox Corporation Impact printer with cartridge print wheel

Also Published As

Publication number Publication date
DE2961565D1 (en) 1982-02-04
EP0013346A1 (de) 1980-07-23
CA1122145A (en) 1982-04-20
JPS5579159A (en) 1980-06-14
AU5254779A (en) 1980-06-19
BR7908073A (pt) 1980-07-22
AU527731B2 (en) 1983-03-17
IT1163740B (it) 1987-04-08
US4264221A (en) 1981-04-28
JPS605191B2 (ja) 1985-02-08
ES486350A1 (es) 1980-09-16
IT7927735A0 (it) 1979-11-30

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