US3759359A - Wire matrix printer heads - Google Patents

Wire matrix printer heads Download PDF

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Publication number
US3759359A
US3759359A US00222469A US3759359DA US3759359A US 3759359 A US3759359 A US 3759359A US 00222469 A US00222469 A US 00222469A US 3759359D A US3759359D A US 3759359DA US 3759359 A US3759359 A US 3759359A
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US
United States
Prior art keywords
printer head
printing
printer
carriage
matrix
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 - Lifetime
Application number
US00222469A
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English (en)
Inventor
D Stellmach
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.)
Datasaab AB
Original Assignee
Walther Bueromaschinen GmbH
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 Walther Bueromaschinen GmbH filed Critical Walther Bueromaschinen GmbH
Application granted granted Critical
Publication of US3759359A publication Critical patent/US3759359A/en
Assigned to DATASAAB AB, A JOINT STOCK COMPANY OF SWEDEN reassignment DATASAAB AB, A JOINT STOCK COMPANY OF SWEDEN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WALTHER BUROMASCHINEN GMBH
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/5056—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements using dot arrays providing selective dot disposition modes, e.g. different dot densities for high speed and high-quality printing, array line selections for multi-pass printing, or dot shifts for character inclination
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/24—Print head assemblies serial printer type
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface

Definitions

  • a wire matrix printer head has the recording ends of wires positioned to form a matrix of five vertical columns of seven points each.
  • the head is pivotally mounted on a carriage moveable in the direction of printing and an electromagnet on the carriage attracts an armature plate on the printer head to tilt the printer head downwardly to print certain characters so that the vertical range of printing of the recording ends is ex tended beyond the seven points of the vertical columns of the matrix.
  • the present invention relates to a wire matrix printer head, more particularly, to the mounting of the head on a moveable carriage so as to extend the vertical range of printing beyond the vertical points of the matrix defined by the ends of the wires.
  • a wire matrix printer head has a plurality of character forming individually operable dot print elements which are simultaneously projected in combination against a recording medium, such as an ink ribbon, to print an entire character at one time.
  • the print elements generally comprise a number of wires having their outer ends arranged in mosaic fashion to define a matrix of X 7, ie, five vertical columns of seven dots each.
  • the wires are selectively actuated in each matrix so as to form a pattern or print a character.
  • the wires are each individually connected to power driven actuating members, which may be logic circuits, and are operated selectively in accordance with the character or data to be printed. Upon proper selection of the wires the letters of the alphabet and the decimal numerical digits as well as most commonly used symbols can be printed.
  • individual electromagnets are employed to actuate the printing wires or needles.
  • the pivoting means 0 may comprise an electromagnet mounted on the carriage which cooperates with an armature plate mounted on the underside of the printer head. The electromagnet is selectively actuated in response to signals corresponding to characters requiring a lowering of the ends of the recording element.
  • a 5 X 9 matrix wire printer head has certain disadvantages.
  • One disadvantage is that a greater number of structural elements are required which significantly increases the manufacturing cost. Further, such a printer head has a significantly greater weight and size because of the additional electronic controls required to actuate the increased number of printing wire and to move the printer head in the direction of the printing. All these additional elements contribute significantly to greater production costs and increase the complexity of construction of the printer head which in turn increases maintenance problems. The combination of these disadvantages have tended to rule against any significant adoption of the use of a 5 X 9 matrix printer head.
  • FIG. 1 is a vertical cross-sectional view of a carriage and printer head incorporating the present invention with the head being shown in its normal printing position;
  • FIG. 2 is a view similar to that of FIG. 1 but showing the printer head in its lower position;
  • FIG. 3 is an enlarged plan view of a word printed with the printer head of the present invention'wherein one of the letters has a downwardly extending portion;
  • FIG. 4 is a space-time functional diagram showing the movements of the matrix printer head during the printing process shown in FIG. 3.
  • the wire matrix printer of the present invention comprises a print head assembly indicated generally at l which comprises a printer head 2 in which are mounted a number of wires having their outer or recording ends 3 arranged in a mosaic pattern to form a X 7 matrix.
  • the recording wires may comprise music wires and at least a portion of the length of each wire is enclosed by a guide sheath in which are provided suitable means for lubricating the wires to enable the wires to move freely within the sheaths in response to the individual electromagnets for actuating each wire.
  • the recording ends 3 of the printing wires or needles are brought into contact with a color or ink ribbon 4 in a preselected pattern in accordance with the character or data to be printed
  • the ribbbri is t'h'efir's'd' agaihst a paper or other recording medium 5 upon which the characters are to be recorded.
  • the other face of the paper is in contact upon a supporting surface 6 which may comprise a roll as also known in the art.
  • the print head assembly is mounted on a carriage 7 which in turn is slideably mounted upon a pair of guide rods 8 and 9 positioned parallel to the line of printing so that the printing head is displaced in the direction of the line of print.
  • the printer head 2 is pivotally mounted at bearings 10 and 11 on a shaft or axle 12 which is also positioned parallel to the direction of printing and to the guide rods 8 and 9.
  • the pivot points 10 and 11 are positioned in the vicinity of the rear guide shaft 8 which is further away from the line of print.
  • a guide rail 14 which is U-shaped and which has an inner end 15 which contacts the lateral surface or underside of a substantially horizontal lip 16 on the carriage 7.
  • the printer head 2 is maintained in its normal printing position, as shown in FIG. 1 by means of a pressure spring 17 disposed between the printer head and the carriage. Maintaining of the printer head in this normal position thus creates an air gap 18 between the printer head and the carriage 7.
  • An armature plate 19 is also fastened to the underside 13 of the printer head and is opposite an elctromagnet 20 mounted on the carriage 7. It is apparent that energization of the electromagnet 20 by means of an electrical signal will attract the armature plate and accordingly the printer head downwardly into the position as shown in FIG. 2.
  • the letters W" and e are formed by utilizing the 5 X 7 printing points in their normal working position. Therefore, no lowering of the printer head is necessary for the printing of these letters.
  • the same 5 X 7 matrix of printing points is lowered in the amount defined by the distance 22 as shown in FIG. 3. This is accomplished by lowering the recording end 21 of the printer head 2 to the extent defined by the air gap 18 downwardly into the position where the full letter g" can be printed in response to a signal generated from a corresponding logic circuit. This signal also energizes the electromagnet 20 which attracts the armature plate 19 to tilt momentarily the printer head to the position as shown in FIG. 2. Upon termination of the signal, the matrix printer head will return to its normal printing position under the action of the spring 17.
  • FIG. 4 the diagram illustrates the relative duration of the movements of the matrix printer head with respect to its printing positions. The time of the downward movement 23, as well as the time 24 of the return movement to the normal position is indicated.
  • the present invention discloses a wire matrix printer having a 5 X 7 matrix with which symbols and characterscan be printed which previously required much larger matrices, such as a 5 X 9 or even greater.
  • the wire matrix printer according to the present invention is simple in construction and operation and requires a minimum of maintenance.
  • the invention has been disclosed with respect to the writing of capital and lower case letters in high speed printers commonly employed in connection with computers and the like, but 17 can also be used with a minimum of modification in thermal printing apparatus, ink recorders, RMP recorders and other forms of recording apparatus.
  • the wire matrix printer according to the present invention can also be used with a vertically downward movement during the printing operation. The pivoting of the printer head would be accomplished in the'same manner as described above in order to obtain the advantages of a larger matrix.
  • a wire matrix printer the combination of elongated guide means parallel to a line of printing, a carriage slideably mounted on said guide means for movement in the direction of printing, a printer head pivotally mounted on said carriage and tiltable in a vertical plane, a plurality of elongated character-forming recording elements on said printer head to define a matrix having a predetermined number of horizontal and vertical ends and adapted to be operated selectively for moving their recorded ends into and out of engagement with a record medium, means for selectively extending the vertical range of printing of said recording ends beyond said predetermined number of vertically positioned recording ends consisting of means selectively pivoting said printer head to momentarily lower the recording ends of said recording elements to print a character, said pivoting means comprising an armature plate on said printer head and an electromagnet on said carriage opposed-from said armature plate and energized in response to predetermined signals corresponding to the characters to be printed.
  • a wire matrix printer as claimed in claim 1 and comprising a U-shaped guide rail on the underside of said printer head, means on said carriage defining a horizontal lip, said guide rail contacting the underside of said lip when the printer head is in its normal printing position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Electronic Switches (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Impact Printers (AREA)
US00222469A 1971-02-19 1972-02-01 Wire matrix printer heads Expired - Lifetime US3759359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2108006A DE2108006C3 (de) 1971-02-19 1971-02-19 Mosaik-Drahtdruckkopf

Publications (1)

Publication Number Publication Date
US3759359A true US3759359A (en) 1973-09-18

Family

ID=5799271

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222469A Expired - Lifetime US3759359A (en) 1971-02-19 1972-02-01 Wire matrix printer heads

Country Status (9)

Country Link
US (1) US3759359A (fr)
JP (1) JPS5114061B1 (fr)
AT (1) AT316900B (fr)
CH (1) CH542057A (fr)
DE (1) DE2108006C3 (fr)
FR (1) FR2125845A5 (fr)
GB (1) GB1319760A (fr)
IT (1) IT951739B (fr)
SE (1) SE367497B (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844395A (en) * 1973-09-12 1974-10-29 Extel Corp Text display control for data printer
US3882985A (en) * 1973-07-23 1975-05-13 Ncr Co Tiltable matrix print head to permit viewing of the characters
US3893558A (en) * 1974-05-17 1975-07-08 Extel Corp Special symbol generator for high speed printer
US3920957A (en) * 1972-05-12 1975-11-18 Sb Electronic Systems Ltd Date records and method and apparatus for their reading and production
US3942620A (en) * 1974-07-25 1976-03-09 International Business Machines Corporation Printing mechanism
US3947853A (en) * 1972-10-12 1976-03-30 International Business Machines Corporation Subscripting, superscripting, and character height compression in ink jet printing apparatus
US3960256A (en) * 1974-10-21 1976-06-01 Digital Equipment Corporation Adjustable carriage apparatus
US4010835A (en) * 1975-08-01 1977-03-08 International Business Machines Corporation Matrix print head
US4037705A (en) * 1975-10-20 1977-07-26 Extel Corporation Descender printing system for dot matrix printer
US4044879A (en) * 1975-03-07 1977-08-30 Siemens Aktiengesellschaft Arrangement for recording characters using mosaic recording mechanisms
FR2347198A1 (fr) * 1976-04-09 1977-11-04 Extel Corp Imprimante a matrice de points et procede de mise en oeuvre
US4063630A (en) * 1976-06-25 1977-12-20 International Business Machines Corporation Typewriter impact position adjustment mechanism
US4077336A (en) * 1975-02-13 1978-03-07 Society Said: LOGABAX Printing device for high speed printers
US4086997A (en) * 1977-03-07 1978-05-02 Wang Laboratories, Inc. Adjustable support for print head assembly
US4196666A (en) * 1976-03-04 1980-04-08 Hitachi Koki Company, Limited Printing apparatus having print line visibility control
US4284363A (en) * 1979-07-30 1981-08-18 International Business Machines Corp. Data matrix print head
US4431319A (en) * 1980-08-18 1984-02-14 Epson Corporation Method and apparatus for serial dot printing
EP0104628A3 (en) * 1982-09-27 1985-04-24 Siemens Aktiengesellschaft Method and apparatus for the generation of characters
US4514100A (en) * 1983-08-19 1985-04-30 At&T Teletype Corporation Mounting apparatus for dot matrix print head
WO1985004370A1 (fr) * 1984-03-22 1985-10-10 Dh Technology, Inc. Tete d'impression a aiguilles a haute vitesse munie d'un dispositif de decalage de la position d'impression des aiguilles
US4601593A (en) * 1983-04-12 1986-07-22 Honeywell Information Systems Italia High quality printing method
US4854752A (en) * 1986-03-21 1989-08-08 Hermes Precisa Internatinal S.A. Convertible print head
US4929103A (en) * 1980-11-06 1990-05-29 Mannesmann Ag Shiftable guide for a matrix printhead

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2517461C2 (de) * 1975-04-19 1982-09-09 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Druckwerk mit mindestens einem Druckkopf
US4029190A (en) * 1976-06-28 1977-06-14 Xerox Corporation Font conversion apparatus
SE403325B (sv) * 1976-11-10 1978-08-07 Facit Ab Snabbskrivare med ett pneumatiskt paverkat skrivhuvud
DE2823153C2 (de) * 1978-05-26 1982-08-19 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Druckeinrichtung mit einem beweglichen Druckkopf
DE3125426A1 (de) * 1981-06-27 1983-01-20 Olympia Werke Ag, 2940 Wilhelmshaven Matrixdrucker mit einem laengs eines aufzeichnungstraegers in druckzeilenrichtung bewegbaren druckkopf
DE3247080C2 (de) * 1981-12-19 1987-04-23 Ricoh Co., Ltd., Tokio/Tokyo Farbstrahldrucker
DE3403795C2 (de) * 1984-02-01 1986-12-18 Mannesmann AG, 4000 Düsseldorf Matrixnadeldruckkopf mit einem in Spaltenrichtung verstellbaren Mundstück
DE3545916A1 (de) * 1985-12-23 1987-07-02 Olympia Ag Verfahren zum automatischen unterstreichen eines abschnittes eines textes in prozessorgesteuerten schreib- oder bueromaschinen aehnlicher bauart

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907270A (en) * 1954-12-31 1959-10-06 Ibm Wire printer
US2911085A (en) * 1957-07-01 1959-11-03 Burroughs Corp Wire printer with oscillatory print head
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3426880A (en) * 1967-04-14 1969-02-11 Friden Inc Serial character matrix page printer
US3572238A (en) * 1967-11-15 1971-03-23 Philips Corp Print-head drive
US3627096A (en) * 1969-04-25 1971-12-14 Ibm Wire printing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907270A (en) * 1954-12-31 1959-10-06 Ibm Wire printer
US2911085A (en) * 1957-07-01 1959-11-03 Burroughs Corp Wire printer with oscillatory print head
US3426880A (en) * 1967-04-14 1969-02-11 Friden Inc Serial character matrix page printer
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
US3572238A (en) * 1967-11-15 1971-03-23 Philips Corp Print-head drive
US3627096A (en) * 1969-04-25 1971-12-14 Ibm Wire printing method

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920957A (en) * 1972-05-12 1975-11-18 Sb Electronic Systems Ltd Date records and method and apparatus for their reading and production
US3947853A (en) * 1972-10-12 1976-03-30 International Business Machines Corporation Subscripting, superscripting, and character height compression in ink jet printing apparatus
US3882985A (en) * 1973-07-23 1975-05-13 Ncr Co Tiltable matrix print head to permit viewing of the characters
US3844395A (en) * 1973-09-12 1974-10-29 Extel Corp Text display control for data printer
US3893558A (en) * 1974-05-17 1975-07-08 Extel Corp Special symbol generator for high speed printer
US3942620A (en) * 1974-07-25 1976-03-09 International Business Machines Corporation Printing mechanism
US3960256A (en) * 1974-10-21 1976-06-01 Digital Equipment Corporation Adjustable carriage apparatus
US4077336A (en) * 1975-02-13 1978-03-07 Society Said: LOGABAX Printing device for high speed printers
US4044879A (en) * 1975-03-07 1977-08-30 Siemens Aktiengesellschaft Arrangement for recording characters using mosaic recording mechanisms
US4010835A (en) * 1975-08-01 1977-03-08 International Business Machines Corporation Matrix print head
US4037705A (en) * 1975-10-20 1977-07-26 Extel Corporation Descender printing system for dot matrix printer
US4196666A (en) * 1976-03-04 1980-04-08 Hitachi Koki Company, Limited Printing apparatus having print line visibility control
FR2347198A1 (fr) * 1976-04-09 1977-11-04 Extel Corp Imprimante a matrice de points et procede de mise en oeuvre
US4063630A (en) * 1976-06-25 1977-12-20 International Business Machines Corporation Typewriter impact position adjustment mechanism
US4086997A (en) * 1977-03-07 1978-05-02 Wang Laboratories, Inc. Adjustable support for print head assembly
US4284363A (en) * 1979-07-30 1981-08-18 International Business Machines Corp. Data matrix print head
US4431319A (en) * 1980-08-18 1984-02-14 Epson Corporation Method and apparatus for serial dot printing
US4929103A (en) * 1980-11-06 1990-05-29 Mannesmann Ag Shiftable guide for a matrix printhead
EP0104628A3 (en) * 1982-09-27 1985-04-24 Siemens Aktiengesellschaft Method and apparatus for the generation of characters
US4601593A (en) * 1983-04-12 1986-07-22 Honeywell Information Systems Italia High quality printing method
US4514100A (en) * 1983-08-19 1985-04-30 At&T Teletype Corporation Mounting apparatus for dot matrix print head
WO1985004370A1 (fr) * 1984-03-22 1985-10-10 Dh Technology, Inc. Tete d'impression a aiguilles a haute vitesse munie d'un dispositif de decalage de la position d'impression des aiguilles
US4640633A (en) * 1984-03-22 1987-02-03 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus
US4854752A (en) * 1986-03-21 1989-08-08 Hermes Precisa Internatinal S.A. Convertible print head

Also Published As

Publication number Publication date
SE367497B (fr) 1974-05-27
JPS5114061B1 (fr) 1976-05-06
DE2108006B2 (de) 1974-05-02
GB1319760A (en) 1973-06-06
IT951739B (it) 1973-07-10
DE2108006C3 (de) 1974-12-12
AT316900B (de) 1974-07-25
CH542057A (de) 1973-09-30
FR2125845A5 (fr) 1972-09-29
DE2108006A1 (de) 1972-08-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DATASAAB AB, VEDDESTAVAGEN 13, S-17586 JARFALLA, S

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WALTHER BUROMASCHINEN GMBH;REEL/FRAME:003852/0300

Effective date: 19801020