US3627096A - Wire printing method - Google Patents

Wire printing method Download PDF

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Publication number
US3627096A
US3627096A US819369A US3627096DA US3627096A US 3627096 A US3627096 A US 3627096A US 819369 A US819369 A US 819369A US 3627096D A US3627096D A US 3627096DA US 3627096 A US3627096 A US 3627096A
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United States
Prior art keywords
printing
head
wire
wires
characters
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
US819369A
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English (en)
Inventor
Edward D Finnegan
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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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    • 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

Definitions

  • the primary purpose of this invention is to effect good quality wire-matrix printing with little reduction in the printing speed and at little or no additional cost of the wire printing device.
  • a method for forming characters with a wire printing device wherein the wires are actuated at predetermined time intervals but in a staggered fashion to form dots overlapping in the vertical plane thereby rendering more legible characters. Additionally the printing method of the subject invention teaches the employment of a wire printing device having strategically positioned printing wires for printing better quality upper and lower case characters.
  • FIG. I illustrates one type of wire printing device in which the subject invention can be employed.
  • FIG. 2 illustrates on an enlarged scale one example of characters printed by use of wire printing devices employing previously known methods.
  • FIG. 3 illustrates the better quality upper case characters printed by use of one embodiment of the subject invention.
  • FIG. d shows one example of numbers printed with wire printers presently used.
  • FIG. 5 shows the better quality numbers that can be printed by using an embodiment of the subject invention.
  • FIG. 6 illustrates the printing end of a print head employing one embodiment of the subject invention.
  • FIG. 7 illustrates the printing end of a print head employing another embodiment of the subject invention.
  • FIG. 8 illustrates selected lower case alphabetical symbols which can be printed by using the embodiments of the invention shown in FIG. "7.
  • the subject invention preferably is embodied in a printer head such as that shovim in FIG. I and described in detail hereinafter.
  • a printer head such as that shovim in FIG. I and described in detail hereinafter.
  • individual wires it are actuated to press an inking ribbon 12 into contact with a record member such as the paper 113 resting against a platen I4 for printing characters comprised of a plurality of dots or impressions.
  • electromagnetic actuators 15 are energized to actuate each wire as needed to form the desired character as the head is translated across the paper.
  • a rotatable threaded shaft 16 is passed through a threaded opening 17 in the frame 118 of the head to drive the assembly sidewise.
  • An additional shaft 19 passing through a close fitting opening 20 in the frame holds the head steady as it is translated.
  • the individual actuators 15 generally comprise an electromagnet having an armature fastened to the wire Ill for movement thereof lengthwise through a wire guide 21.
  • the guide is fastened to the frame by the screws 21a and extends from a position near the actuators to a location closely adjacent the platen M.
  • the inlring ribbon is fed around the rollers 22 and across a guide 2d between the wire ends and the paper.
  • the individual actuators lid are energized by the transmission of an electric current signal to the associated conductor 25 extending from an actuator energizer 2b.
  • the character code logic circuit 27 determines which of the wires should be actuated at each position and feeds the signal through the conductor 28 to the actuator energizer.
  • the characters were formed by actuating selected ones of the several wires (usually seven) at each of several distinct and spaced positions (usually five in number) for printing the selected symbol.
  • the individual wires are actuated in synchronization with the translation of the head to form characters such as those indicated in FIG. 2 of the drawings.
  • the upper case letters are shown and it can be noted that little difficulty is encountered in printing a very legible character if the letters are square and do not call for curved or diagonally extending lines.
  • the alphabetical characters "T” and E" are shown in FIG. 2 printed in a normal manner of firing a seven-wire printing head at live laterally spaced positions to form a 5X7 matrix. It can be noted that the quality of the Ietters T and E is very good.
  • FIG. 3 various characters corresponding to those of FIG. 2 and which are printed by the subject invention.
  • the improvement in the aesthetic qualities of the higher case characters if readily seen in comparing the characters of FIGS. 2 and 3.
  • the characters in FIG. 3 are printed in accordance with the present invention by triggering or firing the wires at the normal five spaces as was accomplished in printing the characters in FIG. 2, and additionally by firing at half spaces positioned in between and in overlapping relationship to the five spaces, thereby making a total of nine positions overlapping or staggered in the vertical plane at which each wire can be triggered.
  • the only qualification in the printing operation is that each firing of a wire must be spaced by a full print position, i.e., a complete space must exist between each position at which the wire is actuated.
  • dots 30 and 31 in FIG. 3 are printed at the standard firing positions while the dots 32 and 34 are positioned at the half-fire positions. Note that the adjacent dots 31 through 34 overlap in the vertical plane to enable the formation of the straighter lines extending diagonally across the plot of the normal 5X7 matrix. Thus, dots which overlap" are dots printed at adjacent half-fire positions by different wires.
  • the heretofore described invention is also advantageous in printing numbers as is shown in FIGS. 4 and 5.
  • FIG. 4 are shown the numbers as previously printed and it can be noted readily that irregularly curved segments occur in such numbers as the 3, 6, 8 and 9 while irregular diagonal lines exist in the printed numbers 4 and 7.
  • FIG. 5 the subject invention is used in which the print wires are fired at the half positions.
  • the improvement in the quality of the numbers is obvious.
  • the number 2 is well-rounded with the dots 35, 36 and 37 overlapping in the vertical plane.
  • the improved number 7 embodies a straight diagonal line formed by firing every other wire at the half-fire position. Improvements in the other numbers also are noted, i.e., the is now the more pleasing oblong configuration instead of being square.
  • the 6 also is improved by utilizing the diagonal line with overlapping dots achievable with the present invention.
  • the advantages of the present invention are readily obvious in printing both the higher case alphabetical characters and the numeric characters.
  • Dots 51-55 are printed by a single wire which is caused to scan at an essentially constant velocity across the paper. Each dot 51-55 is printed at what is defined as a full position. Dots 71-74 are similarly each printed by a given wire but at half positions. In this figure, there are five spaced vertical rows, each headed by a dot 51-55, and 7 horizontal rows forming a X7 matrix, with four half position vertical rows including dots 71-74.
  • the distance d is defined as the distance traveled by the print head 10 in the minimum time required to actuate a given wire 11 twice and is related to the mechanical and magnetic characteristics of the print head requiring that a reset time be allowed before a given wire can be actuated to the print position again, for example, to form dot 82 after 81.
  • the actual print timing for the head is established such that the distance d between dots 54 and 55 is equal to or greater than the distance d and such that the distance 55d between dots 54 and 65, 74 is greater than d. With this requirement, it is apparent that it would be impossible to fire a print wire to form, for example, dots 84 and 85 where 85 is on a half position adjacent to the full position of dot 84.
  • L is defined as the space on the paper traveled by the print head in the minimum time required to fire, reset, and fire again.
  • the spacing L between adjacent vertical rows of the 9X7 matrix is defined as being less than L, where 2L is equal to or greater than L.
  • the L and L dimensions are associated with the 9X7 matrix
  • the d' and d dimensions are associated with the 5X7 matrix with four half positions.
  • upper and lower case letters can be printed with the same writing head by the use of additional wires positioned below the standard 7 wire alignment and used only to print the lower case characters.
  • additional wires positioned below the standard 7 wire alignment and used only to print the lower case characters For instance, in the embodiment shown in FIG. 6, one preferred embodiment incorporates the aligned seven print wires for printing upper case letters and two additional print wires used only for printing the lower case letters.
  • the print wires positioned below the dotted line 38 and numbered 39 and 40 are used only to print lower case alphabetical character and are not used to print higher case alphabetical characters and numeric characters.
  • FIG. 8 whereinmany lower case letters demand an extension below the normal base line of. the higher case characters.
  • the characters g, j, p, q and y extend below the line while the other lower case characters only extend above the print line.
  • a method is provided for printing lower case characters by utilizing the top seven wires for printing most of the lower case alphabet and printing with the wires 39 and 40 positioned below the line only when the specific characters are to be printed which demand an extension below the print line.
  • the same print head can be utilized for printing both upper and lower case characters.
  • the comma and semicolon are more legible as shown in FIG. 8. It is also known that foreign alphabets and irregular shapes are formed more easily with this embodiment of the invention.
  • FIG. 7 a printing head which embodies the print wires positioned in a vertical plane and in addition, incorporates an additional print wire 41 positioned adjacent the third and fourth wires 42 and 43 and at the half-fire position partially between those wires.
  • the half-fire position of the additional wire could also precede those wires with the same effect being rendered by firing this wire at the next following position while printing the character.
  • the additional wire position is needed to fonn a more perfect character.
  • these lower case alphabetical characters are formed in a much more precise manner in utilizing this additional wire.
  • the dots numbered 410 all correspond to printing by the wire 41. It will be noted this dot location particularly enhances the printing of several of the characters.
  • FIG. 7 There also is shown in FIG. 7 an additional wire 44 positioned adjacent the sixth and seventh wires 45 and 46 at the half-fire position.
  • This wire is especially useful in printing many of the same characters as shown in FIG. 8 because they more logically form these characters in the manner in which they are normally written. For instance, in printing the lower case print a, b, c, d, e, g, h, k, m, n, a, p, q, r and s, the dot 4lafor'ms an integral part of the diagonal segment and enables the printing of a well-formed character.
  • the wire 44 is used in forming the dot numbered 44afor printing more accurately the characters a, b, e, g, 0, p, q, u, w and y.
  • the half-firing of the print wires print be eliminated, i.e., operate with a 5X9 print matrix instead of a 9X9 as is supplied in the half-firing head, and still a more readable character be printed.
  • step of effecting relative movement further comprises the step of scanning parallel noncolinear print lines on said record member with a plurality of print wires arranged in a straight row.
  • a printing head for printing on a record member comprising a plurality of printing wires having a first end positioned adjacent said member and the second end positioned remote to said member,
  • a wire guide positioned between the actuators and record member functioning to align the wires in a single row extending normal to the direction of relative movement between the head and member
  • each said actuator being energized to form dots in said member spaced by at least a distance d.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Impact Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
US819369A 1969-04-25 1969-04-25 Wire printing method Expired - Lifetime US3627096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81936969A 1969-04-25 1969-04-25

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US3627096A true US3627096A (en) 1971-12-14

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US819369A Expired - Lifetime US3627096A (en) 1969-04-25 1969-04-25 Wire printing method

Country Status (5)

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US (1) US3627096A (pt)
JP (1) JPS5040615B1 (pt)
DE (1) DE2016917C3 (pt)
FR (1) FR2042947A5 (pt)
GB (2) GB1306489A (pt)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750792A (en) * 1972-08-04 1973-08-07 Ncr Co Automatic media thickness compensator for a printer
US3752288A (en) * 1971-02-18 1973-08-14 Olivetti & Co Spa Electrographic printer with plural oscillating print head
US3757346A (en) * 1971-10-07 1973-09-04 Int Standard Electric Corp Printing method
US3759359A (en) * 1971-02-19 1973-09-18 Walther Bueromasch Gmbh Wire matrix printer heads
US3797629A (en) * 1970-04-24 1974-03-19 Rena Fa Bueromaschinenfab Gmbh Mosaic printing head
US3802543A (en) * 1971-09-13 1974-04-09 Centronics Data Computer Jewel bearings for printer heads and the like
JPS4976433A (pt) * 1972-11-11 1974-07-23
US3858703A (en) * 1973-01-05 1975-01-07 Centronics Data Computer Bidirectional dual head printer
DE2456816A1 (de) * 1973-12-11 1975-06-19 Ibm Druckkopf fuer drahtdrucker
US3893558A (en) * 1974-05-17 1975-07-08 Extel Corp Special symbol generator for high speed printer
US3893220A (en) * 1974-08-01 1975-07-08 Gen Electric Method of making wire matrix print head nozzle
US3900094A (en) * 1973-05-10 1975-08-19 Lrc Inc Matrix printer with overlapping print dots
JPS50110527A (pt) * 1974-02-07 1975-08-30
US3942620A (en) * 1974-07-25 1976-03-09 International Business Machines Corporation Printing mechanism
US3948382A (en) * 1973-01-29 1976-04-06 The Singer Company Data terminal printing assembly
US3960256A (en) * 1974-10-21 1976-06-01 Digital Equipment Corporation Adjustable carriage apparatus
US3966035A (en) * 1974-03-01 1976-06-29 Erickson Robert L Printer
FR2302860A1 (fr) * 1975-03-07 1976-10-01 Siemens Ag Installation pour inscrire des signes a l'aide d'un dispositif d'ecriture a mosaique
JPS51124329A (en) * 1975-04-23 1976-10-29 Seiko Epson Corp Method of controlling thermal senstive printer
US4004671A (en) * 1974-12-16 1977-01-25 Lrc, Inc. Wire matrix print head
US4029190A (en) * 1976-06-28 1977-06-14 Xerox Corporation Font conversion apparatus
US4031992A (en) * 1974-11-14 1977-06-28 Societe D'applications Generales D'electricite Et De Mecanique S A G E M Printing device
US4037705A (en) * 1975-10-20 1977-07-26 Extel Corporation Descender printing system for dot matrix printer
US4059182A (en) * 1973-12-20 1977-11-22 U.S. Philips Corporation Mosaic printer
US4084678A (en) * 1974-07-31 1978-04-18 Siemens Aktiengesellschaft Printer needle guide means for mosaic printers
US4145145A (en) * 1976-04-22 1979-03-20 U.S. Philips Corporation Guide for a printing head of a printing device
EP0001472A1 (en) * 1977-06-30 1979-04-18 R.C. Sanders Technology Systems Inc. Method and apparatus for generating alpha-numeric characters for an impact matrix printer
FR2413977A1 (fr) * 1978-01-09 1979-08-03 Rank Organisation Ltd Dispositif d'impression matriciel
US4184781A (en) * 1977-04-19 1980-01-22 Oki Electric Industry Co., Ltd. Defect detector
US4255062A (en) * 1978-04-17 1981-03-10 Mannesmann Aktiengesellschaft Matrix print head
US4664541A (en) * 1983-07-15 1987-05-12 Honeywell Information Systems Italia Microprogrammed control apparatus for dot matrix serial printers
US5020927A (en) * 1986-11-21 1991-06-04 Brother Kogyo Kabushiki Kaisha Grouping of dot data in a multiple column dot-matrix printer
USD806786S1 (en) * 2015-09-09 2018-01-02 Hyundai Motor Company Typeface
USD806787S1 (en) * 2015-09-09 2018-01-02 Hyundai Motor Company Typeface

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7700339L (sv) * 1976-04-09 1977-10-10 Extel Corp Sett vid teckenskrivning med en punktmatrisskrivare samt punktmartisskrivare for att utova settet
CA1292316C (en) * 1986-09-05 1991-11-19 Robert H. Whisker Postal meter system

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797629A (en) * 1970-04-24 1974-03-19 Rena Fa Bueromaschinenfab Gmbh Mosaic printing head
US3752288A (en) * 1971-02-18 1973-08-14 Olivetti & Co Spa Electrographic printer with plural oscillating print head
US3759359A (en) * 1971-02-19 1973-09-18 Walther Bueromasch Gmbh Wire matrix printer heads
US3802543A (en) * 1971-09-13 1974-04-09 Centronics Data Computer Jewel bearings for printer heads and the like
US3757346A (en) * 1971-10-07 1973-09-04 Int Standard Electric Corp Printing method
US3750792A (en) * 1972-08-04 1973-08-07 Ncr Co Automatic media thickness compensator for a printer
JPS4976433A (pt) * 1972-11-11 1974-07-23
JPS5215495B2 (pt) * 1972-11-11 1977-04-30
US3858703A (en) * 1973-01-05 1975-01-07 Centronics Data Computer Bidirectional dual head printer
US3948382A (en) * 1973-01-29 1976-04-06 The Singer Company Data terminal printing assembly
US3900094A (en) * 1973-05-10 1975-08-19 Lrc Inc Matrix printer with overlapping print dots
DE2456816A1 (de) * 1973-12-11 1975-06-19 Ibm Druckkopf fuer drahtdrucker
US3897865A (en) * 1973-12-11 1975-08-05 Ibm Dot printing apparatus
US4059182A (en) * 1973-12-20 1977-11-22 U.S. Philips Corporation Mosaic printer
JPS50110527A (pt) * 1974-02-07 1975-08-30
US3966035A (en) * 1974-03-01 1976-06-29 Erickson Robert L 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
US4084678A (en) * 1974-07-31 1978-04-18 Siemens Aktiengesellschaft Printer needle guide means for mosaic printers
US3893220A (en) * 1974-08-01 1975-07-08 Gen Electric Method of making wire matrix print head nozzle
US3960256A (en) * 1974-10-21 1976-06-01 Digital Equipment Corporation Adjustable carriage apparatus
US4031992A (en) * 1974-11-14 1977-06-28 Societe D'applications Generales D'electricite Et De Mecanique S A G E M Printing device
US4004671A (en) * 1974-12-16 1977-01-25 Lrc, Inc. Wire matrix print head
FR2302860A1 (fr) * 1975-03-07 1976-10-01 Siemens Ag Installation pour inscrire des signes a l'aide d'un dispositif d'ecriture a mosaique
JPS51113419A (en) * 1975-03-07 1976-10-06 Siemens Ag Code recorder using mosaic printing mechanism
JPS51124329A (en) * 1975-04-23 1976-10-29 Seiko Epson Corp Method of controlling thermal senstive printer
US4037705A (en) * 1975-10-20 1977-07-26 Extel Corporation Descender printing system for dot matrix printer
US4145145A (en) * 1976-04-22 1979-03-20 U.S. Philips Corporation Guide for a printing head of a printing device
DE2718519A1 (de) * 1976-06-28 1978-01-05 Xerox Corp Typenumsetzungsgeraet
US4029190A (en) * 1976-06-28 1977-06-14 Xerox Corporation Font conversion apparatus
US4184781A (en) * 1977-04-19 1980-01-22 Oki Electric Industry Co., Ltd. Defect detector
EP0001472A1 (en) * 1977-06-30 1979-04-18 R.C. Sanders Technology Systems Inc. Method and apparatus for generating alpha-numeric characters for an impact matrix printer
US4159882A (en) * 1977-06-30 1979-07-03 R. C. Sanders Technology Systems, Inc. High quality printer
FR2413977A1 (fr) * 1978-01-09 1979-08-03 Rank Organisation Ltd Dispositif d'impression matriciel
US4247207A (en) * 1978-01-09 1981-01-27 The Rank Organisation Limited Matrix printer
US4255062A (en) * 1978-04-17 1981-03-10 Mannesmann Aktiengesellschaft Matrix print head
US4664541A (en) * 1983-07-15 1987-05-12 Honeywell Information Systems Italia Microprogrammed control apparatus for dot matrix serial printers
US5020927A (en) * 1986-11-21 1991-06-04 Brother Kogyo Kabushiki Kaisha Grouping of dot data in a multiple column dot-matrix printer
USD806786S1 (en) * 2015-09-09 2018-01-02 Hyundai Motor Company Typeface
USD806787S1 (en) * 2015-09-09 2018-01-02 Hyundai Motor Company Typeface

Also Published As

Publication number Publication date
GB1305252A (pt) 1973-01-31
JPS5040615B1 (pt) 1975-12-25
DE2016917B2 (de) 1979-03-01
DE2016917A1 (de) 1970-11-26
FR2042947A5 (pt) 1971-02-12
DE2016917C3 (de) 1979-10-31
GB1306489A (en) 1973-02-14

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