US3759359A - Wire matrix printer heads - Google Patents

Wire matrix printer heads Download PDF

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Publication number
US3759359A
US3759359A US3759359DA US3759359A US 3759359 A US3759359 A US 3759359A US 3759359D A US3759359D A US 3759359DA US 3759359 A US3759359 A US 3759359A
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Grant
Patent type
Prior art keywords
printer head
printing
printer
carriage
means
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
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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 A JOINT STOCK Co OF SWEDEN AB
Original Assignee
WALTHER BUEROMASCH GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485Typewriters 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
    • B41J2/505Typewriters 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
    • B41J2/5056Typewriters 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters 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
    • B41J2/23Typewriters 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
    • B41J2/235Print head assemblies
    • B41J2/24Print head assemblies serial printer type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/001Mechanisms for bodily moving print heads or carriages parallel to the paper surface

Abstract

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 extended beyond the seven points of the vertical columns of the matrix.

Description

United States Steiimaeh atet [191 Sept. 18, 1973 WIRE MATRIX PRINTER HEADS [75] Inventor: Dieter Stellmach,Niederstotzingen,

Germany [73] Assignee: Walther BurornasclfinenjGnihH,

Gerstetten, Germany [22] Filed: Feb. 1, 1972 [21] Appl. No.: 222,469

[30] Foreign Application Priority Data Feb. 19, 1971 Germany P 21 08 006.8

[52] US. Cl. ..197/1 R, 101/93 C [51] Int. Cl B41j3/02 [58] Field of Search 197/1; 101/93 I [56] References Cited UNITED STATES PATENTS 10/1969 Furman 101/93 C 11/1959 Leathers 197/1 R 3,400,798 9/1968 Smith 197/1 R 3,426,880 2/1969 Blodgett 197/1 R 3,572,238 3/1971 Andersen.... 197/1 R 3,627,096 12/1971 Finnegan 197/1 R Primary Examiner-Edgar S. Burr Att0rney-Edmund M. Jaskiewicz [57] ABSTRACT 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.

4 Claims, 4 Drawing Figures Patented Sept. 18, 1973 Fig. 4

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. Generally, individual electromagnets are employed to actuate the printing wires or needles.

It has not been possible to print both capital and lower case letters of the alphabet with known wire matrix printers having a matrix of 5 X 7 points. Where it has been desired to print both capital and lower case letters such printer heads have generally been provided with a larger matrix consisting of at least 5 X 9 points in which the printing ends of the wires are arranged in five vertical columns of nine points each. A 5 X 9 matrix would thus be sufficient to print the letters forming the word Weg as shown in the following diagram:

It is another object of the present invention to provide a wire matrix printer head which would print a much greater variety of symbols than heretofore possible with a 5 X 7 matrix.

It is a further object of the present invention to provide a 5 X 7 matrix wire printer which is simple in construction and operation but which incorporates the advantages of a printer head having a larger matrix with a greater number of printing points.

operated selectively for moving their recorded ends I into and out of engagement with a record medium, such as an ink ribbon. Means are provided for selectively pivoting the printer head from its normal printing position to a position to lower momentarily the recording ends of the recording elements to print a character so as to extend the vertical range of printing of the recording ends beyond the number of vertically positioned points of the wire matrix. 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.

Other objects and advantages of the present inven- Based .upon actual experience, the use of 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.

It is therefore the principal object of the present invention to provide a novel and improved wire matrix printer.

tion will be apparent upon reference to the accompanying description when taken in conjunction with the following drawings, which are exemplary, wherein;

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; and

FIG. 4 is a space-time functional diagram showing the movements of the matrix printer head during the printing process shown in FIG. 3.

Proceeding next to the drawings wherein like reference symbols indicate the same parts throughout the various views a specific embodiment of the present invention will be described in detail.

As may be seen in FIG. 1, 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. As known in the art, 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.

In order to permit a tilting or pivoting of the print head assembly in a vertical plane 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.

On the underside 13 of the printer head there is attached 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.

If it is desired to print the word Weg" as shown in FIG. 3, 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. However, in order to print g", including its lower end, 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.

In 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.

Thus it can be seen that 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. Further, 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. With a minimum of modification, 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.

It will be understood that this invention is susceptible to modification in order to adapt it to different usages and conditions, and accordingly, it is described to comprehend such modifications within this invention as may fall within the scope of the appended claims.

What is claimed is:

I. In 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.

2. In a wire matrix printer as claimed in claim 1 wherein said guide means comprise a pair of parallel guide rods, said printer head pivotally mounted in the vicinity of the guide rod further away from the line of printing.

3. In 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.

4. In a wire matrix printer as claimed in claim 3 and comprising spring means between said carriage and said printer head to maintain said printer head in its normal position so that an air gap is formed therebetween.

Claims (4)

1. In 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 characterforming 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.
2. In a wire matrix printer as claimed in claim 1 wherein said guide means comprise a pair of parallel guide rods, said printer head pivotally mounted in the vicinity of the guide rod further away from the line of printing.
3. In 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.
4. In a wire matrix printer as claimed in claim 3 and comprising spring means between said carriage and said printer head to maintain said printer head in its normal position so that an air gap is formed therebetween.
US3759359A 1971-02-19 1972-02-01 Wire matrix printer heads Expired - Lifetime US3759359A (en)

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DE19712108006 DE2108006C3 (en) 1971-02-19 1971-02-19

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US3759359A true US3759359A (en) 1973-09-18

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US3759359A Expired - Lifetime US3759359A (en) 1971-02-19 1972-02-01 Wire matrix printer heads

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JP (1) JPS5114061B1 (en)
DE (1) DE2108006C3 (en)
FR (1) FR2125845A5 (en)
GB (1) GB1319760A (en)

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 (en) * 1976-04-09 1977-11-04 Extel Corp Dot-matrix printer and method of operation
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 (en) * 1984-03-22 1985-10-10 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus
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 (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2517461C2 (en) * 1975-04-19 1982-09-09 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen, De
US4029190A (en) * 1976-06-28 1977-06-14 Xerox Corporation Font conversion apparatus
GB1578648A (en) * 1976-11-10 1980-11-05 Facit Ab Printer
DE2823153C2 (en) * 1978-05-26 1982-08-19 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen, De
DE3125426C2 (en) * 1981-06-27 1990-11-29 Aeg Olympia Office Gmbh, 2940 Wilhelmshaven, De
DE3247080C2 (en) * 1981-12-19 1987-04-23 Ricoh Co., Ltd., Tokio/Tokyo, Jp
JPS59217006A (en) * 1983-05-25 1984-12-07 Hiroshi Ikeda Joint
DE3403795C2 (en) * 1984-02-01 1986-12-18 Mannesmann Ag, 4000 Duesseldorf, De
EP0219274A3 (en) * 1985-10-10 1988-05-25 The Boc Group, Inc. Medical apparatus with accessory mounting system
DE3545916C2 (en) * 1985-12-23 1990-01-25 Aeg Olympia Ag, 2940 Wilhelmshaven, De

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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)

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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 (en) * 1976-04-09 1977-11-04 Extel Corp Dot-matrix printer and method of operation
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 (en) * 1984-03-22 1985-10-10 Dh Technology, Inc. High-speed wire print head with wire print position shift apparatus
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 Type
DE2108006C3 (en) 1974-12-12 grant
DE2108006B2 (en) 1974-05-02 application
JPS5114061B1 (en) 1976-05-06 grant
FR2125845A5 (en) 1972-09-29 application
GB1319760A (en) 1973-06-06 application
DE2108006A1 (en) 1972-08-31 application

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