US3921277A - Method of making printing disc - Google Patents

Method of making printing disc Download PDF

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Publication number
US3921277A
US3921277A US413783A US41378373A US3921277A US 3921277 A US3921277 A US 3921277A US 413783 A US413783 A US 413783A US 41378373 A US41378373 A US 41378373A US 3921277 A US3921277 A US 3921277A
Authority
US
United States
Prior art keywords
printing
disc
arms
making
character
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US413783A
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English (en)
Inventor
Herbert Tramposch
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.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes Inc
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 Pitney Bowes Inc filed Critical Pitney Bowes Inc
Priority to US413783A priority Critical patent/US3921277A/en
Priority to CA211,823A priority patent/CA1002303A/en
Priority to CH1480474A priority patent/CH575829A5/xx
Priority to GB48029/74A priority patent/GB1480362A/en
Priority to IT29206/74A priority patent/IT1030786B/it
Priority to JP49128853A priority patent/JPS597582B2/ja
Priority to DE2452843A priority patent/DE2452843C2/de
Priority to FR7437161A priority patent/FR2250638B1/fr
Application granted granted Critical
Publication of US3921277A publication Critical patent/US3921277A/en
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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/24—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being perpendicular to the axis of rotation
    • B41J1/28—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers
    • B41J1/30—Carriers stationary for impression, e.g. with the types or dies not moving relative to the carriers with the types or dies moving relative to the carriers or mounted on flexible carriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49799—Providing transitory integral holding or handling portion

Definitions

  • the printing disc is manufactured in separate stages in order to achieve characteristics within the final assem bly that are necessary for high speed quality printing.
  • the assembled printing disc comprises a disc shaped member of flexible plastic.
  • the hub of the disc has radially extending arms which each unite with a print head base member.
  • the print head base member is plated with a layer of metal,
  • This invention pertains to a method of manufacturing a printing disc, to the finished printing disc article, and more particularly to a composite printing disc assembly that obtains the necessary characteristics for high speed quality printing.
  • a pure metal print head attached to the plastic arm was not satisfactory.
  • the metal print head had the necessary structural strength, but weighed too much for high speed printing.
  • the present inventive composite printing disc assembly seeks to achieve the objective of providing a disc that can operate at high speeds and deliver a high quality of printing.
  • the invention is a plastic and metal composite assembly structured in a novel manner.
  • the print disc hub with its radially extending arms is composed of a flexible plastic such as acetal homopolymer or acetal copolymer.
  • the printing characters are each disposed upon individual print head base members which are fastened to the ends of the arms.
  • the base members are composed of a hard durable plastic such as a glass-filled polysulfone or urea.
  • the character faces on each print head member are plated with a 0.001 inch layer of metal.
  • the metallic plating may consist of a flashing of copper covered over by a layer of nickel, and a final coating of chrome.
  • the aforementioned assembly is constructed by first injection or compression molding an annular shaped ring having a font of characters extending inwardly therefrom.
  • the characters are individually disposed upon a print head base which also contains an interlock extension.
  • the printing disc base is injection molded.
  • the arms contain an aperture in their end portions for receiving a respective interlock extension.
  • the interlock extensions are generally press-fitted into the apertures.
  • the area surrounding the apertures can be heated before or after the insertion of the interlock extensions causing a softening of the plastic. thus resulting in a se cure fit.
  • the plastic may be heated by conventional means or by the use of ultrasonics.
  • the annular ring is removed from the plastic composite structure by a cutting operation.
  • FIG. I is a plan view of a first molded member of the printing disc composite assembly of this invention, comprising an annular ring containing a font of characters;
  • the printing disc composite of this invention comprising a disc shaped base having radially extending arms;
  • FIG. 3 is a plan view of the first and second molded members joined together
  • FIG. 4 is a partial perspective view of the compositely assembled printing disc of the invention with a portion of the first molded member just having been removed therefrom;
  • FIG. 5 is an enlarged perspective view of the interlocking of typical print head with a corresponding arm of the disc shaped base.
  • the invention is for a printing disc assembly constructed of a composite of structural members.
  • the composite assembly comprises a disc shaped member having a plurality of flexible arms extending outwardly from a hub portion of the disc memher.
  • a plurality of print head base members are annularly arranged with respect to each other and each are respectively secured to a corresponding flexible arm at its end portion.
  • the print heads each have a character face. and a bonding surface which is secured to the arm.
  • a first injection or compression molded member is shown.
  • This member can be molded from filled materials such as: (a) polysulfone; (b) urea; (c) nylon; (d) epoxy; (e) phenole; and (f) melamine.
  • This first molded piece has an annular ring shaped section 9, and a plurality of inwardly extending print head base members 10.
  • a typical print head base member 10 can be seen in FIG. 5.
  • the print heads are attached to the ring 9 by means of finger ll.
  • the print heads have a character face 12 on one side, and an interlocking extension 14 on the other side.
  • FIG. 2 shows a second injection molded disc shaped member having a hub 15 and a plurality of flexible, radially extending arms 16. The ends of the flexible arms each contain an aperture 17 as shown in FIG. 5.
  • interlock extensions 14 of the print heads 10 are gener ally press-fitted into the apertures 17 of the flexible arm members 16 as shown by arrows 18 in FIG. 5.
  • the resulting composite assembly is shown in FIG. 3.
  • FIG. 2 is a plan view of a second molded member of v
  • the second molded member can be injection molded from materials such as: (a) acetal homopolymer; (b) acetal copolymer; and (c) polypropylene.
  • the materials for the disc shaped member must be highly flexible so as to withstand many printing impact cycles.
  • the materials for the print heads must be hard and durable so as to provide a high printing resolution.
  • the area around the resulting interlock can be heat treated to soften the plastic and provide a tighter fit.
  • the plastic about the aperture and/or the interlock extension can be heated for a short period of time prior to insertion of the extension 14 into the aperture 17 to provide greater holding strength. If the first molded member is molded from a acetal homopolymer. then the area around the aperture is heated to about 300F., which is the temperature at which this material softens. Care must be exercised. so as not to overheat the material to about 320F. which is the point at which acetal homopolymer starts to deform. When the two interlocking parts are heat treated so that one or both of the plastics begin to soften. the holding strength of the interlock will be enhanced.
  • Heating the plastics can be performed in a conventional manner. or by the use of ultrasonics to create heat within the material.
  • FIG. 3 the annular ring 9 is removed from the disc shaped member (arrows 19 of FIG. 14) by cutting the fingers 11 from the print heads 10. generally about point 20 (see FIG. 5).
  • the resulting assembly is a completed composite printing disc (arrow of FIG. 4.
  • the print heads 10 are each plated with a layer of metal for appearance purposes as well as for improving the durability of the character face 12.
  • interlock extensions 14 of the print heads can be designed as a pin extension or a duality of pins extending from bonding surface 21 (FIG. 5).
  • a method of making a printing disc for use in a serial printing apparatus comprising the steps of:
  • A. molding a first member comprising an annular shaped ring member having a font of characters extending inwardly therefrom. each character disposed upon an individual print head base member. said base member having a character face and a bonding face disposed from said character face. said bonding face containing an interlock extension extending outwardly therefrom;
  • a second member comprising a disc shaped base having a radially extending plurality of arms. one arm for each base member, said arms each containing an aperture in an outer extending end portion thereof for receipt of a corresponding interlock extension of a respective character base member:
  • said first molded member is injection molded.
  • a method of making a printing disc for use in a printing apparatus comprising the steps of:
  • a method of making a printing disc for use in a printing apparatus comprising the steps of:
  • said disc shaped member having a plurality of radially extending flexible arms. said arms each having an end portion for receipt of a corresponding charcter element;
  • said second member being composed of a durable hard material of a hardness which is relatively harder than said flexible material;
US413783A 1973-11-08 1973-11-08 Method of making printing disc Expired - Lifetime US3921277A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US413783A US3921277A (en) 1973-11-08 1973-11-08 Method of making printing disc
CA211,823A CA1002303A (en) 1973-11-08 1974-10-21 Method of making printing discs
CH1480474A CH575829A5 (it) 1973-11-08 1974-11-05
GB48029/74A GB1480362A (en) 1973-11-08 1974-11-06 Printing disc assembly and method for making same
IT29206/74A IT1030786B (it) 1973-11-08 1974-11-07 Disco di stampa e metodo per fabbricarlo
JP49128853A JPS597582B2 (ja) 1973-11-08 1974-11-07 印刷円盤を製造する方法
DE2452843A DE2452843C2 (de) 1973-11-08 1974-11-07 Verfahren zur Herstellung einer Typenscheibe
FR7437161A FR2250638B1 (it) 1973-11-08 1974-11-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US413783A US3921277A (en) 1973-11-08 1973-11-08 Method of making printing disc

Publications (1)

Publication Number Publication Date
US3921277A true US3921277A (en) 1975-11-25

Family

ID=23638614

Family Applications (1)

Application Number Title Priority Date Filing Date
US413783A Expired - Lifetime US3921277A (en) 1973-11-08 1973-11-08 Method of making printing disc

Country Status (8)

Country Link
US (1) US3921277A (it)
JP (1) JPS597582B2 (it)
CA (1) CA1002303A (it)
CH (1) CH575829A5 (it)
DE (1) DE2452843C2 (it)
FR (1) FR2250638B1 (it)
GB (1) GB1480362A (it)
IT (1) IT1030786B (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018639A (en) * 1975-10-15 1977-04-19 Xerox Corporation Method of assembling a composite print wheel
US4044455A (en) * 1975-06-05 1977-08-30 Canon Kabushiki Kaisha Method of making a printing hammer unit
US4106611A (en) * 1974-12-28 1978-08-15 Ricoh Company, Ltd. Serial printing apparatus
US4110884A (en) * 1976-04-23 1978-09-05 Facit Aktiebolag Method for making dust cover for printing needles
US4126400A (en) * 1975-09-12 1978-11-21 Ricoh Company, Ltd. Serial printing apparatus
US4127336A (en) * 1976-03-08 1978-11-28 Nippon Telegraph And Telephone Public Corporation Type heads
US4165189A (en) * 1977-06-08 1979-08-21 Caracteres S.A. Characters carrying disc for a printing machine
US4228577A (en) * 1975-09-12 1980-10-21 Ricoh Company, Ltd. Method of making rotary type wheels
EP0081334A2 (en) * 1981-12-03 1983-06-15 Xerox Corporation Selectively altering the bulk properties of polymer structures
US4416556A (en) * 1981-07-20 1983-11-22 Ricoh Company, Ltd. Type carrier for use in impact-type printing machines
US4674179A (en) * 1985-01-25 1987-06-23 Mannesmann Ag Making an armature assembly for matrix print heads
US4750259A (en) * 1983-11-23 1988-06-14 Honeywell Bull Italia S.P.A. Method of making armature group for mosaic printing head
EP0366498A2 (en) * 1988-10-28 1990-05-02 Oki Electric Industry Co., Ltd. Method of fabricating a biasing plate spring for a wire-dot print head
US5175922A (en) * 1988-08-01 1993-01-05 Mannesmann Aktiengesellschaft Method for the manufacture of an armature assembly for matrix print heads of the hinged-clapper-armature construction

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382527A (en) * 1976-11-22 1978-07-21 Fujitsu Ltd Type element for typewriter
DE3212318C1 (de) * 1982-04-02 1983-07-21 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Verfahren zur Herstellung von einstueckigen Typenscheibenrohlingen fuer Schreib- oder aehnliche Maschinen sowie nach diesem Verfahren hergestellte Typenscheibenrohlinge
JPS5950750U (ja) * 1982-09-27 1984-04-04 株式会社リコー プリンタの印字ハンマ
US4842795A (en) * 1987-07-27 1989-06-27 Internal Business Machines Corporation Method of making coinjection molded daisywheel printhead

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507724A (en) * 1967-09-22 1970-04-21 Itt Method of fabricating laminate-like structures
US3574326A (en) * 1968-03-26 1971-04-13 Donald F Flynn Actuating mechanism for rotating printing disc
US3609861A (en) * 1969-10-21 1971-10-05 Kollsman Instr Corp Method of manufacturing rotary switch rotor contact members
US3698074A (en) * 1970-06-29 1972-10-17 Motorola Inc Contact bonding and packaging of integrated circuits
US3805941A (en) * 1969-06-28 1974-04-23 Honeywell Inf Systems Ballistic print hammer and type-bearing element combination for on-the-fly printer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1932481C3 (de) * 1969-06-26 1974-02-14 Ecofon Verkaufsgesellschaft Probst Kg, 8000 Muenchen Elektrische Schreibmaschine
US3643774A (en) * 1969-11-12 1972-02-22 Burroughs Corp Printing mechanism with resiliently backed printing element
BE795859A (fr) * 1972-02-25 1973-08-23 Xerox Corp Machine a imprimer a grande vitesse avec mouvement intermittent de la roue imprimante et du chariot

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507724A (en) * 1967-09-22 1970-04-21 Itt Method of fabricating laminate-like structures
US3574326A (en) * 1968-03-26 1971-04-13 Donald F Flynn Actuating mechanism for rotating printing disc
US3805941A (en) * 1969-06-28 1974-04-23 Honeywell Inf Systems Ballistic print hammer and type-bearing element combination for on-the-fly printer
US3609861A (en) * 1969-10-21 1971-10-05 Kollsman Instr Corp Method of manufacturing rotary switch rotor contact members
US3698074A (en) * 1970-06-29 1972-10-17 Motorola Inc Contact bonding and packaging of integrated circuits

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106611A (en) * 1974-12-28 1978-08-15 Ricoh Company, Ltd. Serial printing apparatus
US4044455A (en) * 1975-06-05 1977-08-30 Canon Kabushiki Kaisha Method of making a printing hammer unit
US4126400A (en) * 1975-09-12 1978-11-21 Ricoh Company, Ltd. Serial printing apparatus
US4228577A (en) * 1975-09-12 1980-10-21 Ricoh Company, Ltd. Method of making rotary type wheels
US4018639A (en) * 1975-10-15 1977-04-19 Xerox Corporation Method of assembling a composite print wheel
US4127336A (en) * 1976-03-08 1978-11-28 Nippon Telegraph And Telephone Public Corporation Type heads
US4110884A (en) * 1976-04-23 1978-09-05 Facit Aktiebolag Method for making dust cover for printing needles
US4165189A (en) * 1977-06-08 1979-08-21 Caracteres S.A. Characters carrying disc for a printing machine
US4416556A (en) * 1981-07-20 1983-11-22 Ricoh Company, Ltd. Type carrier for use in impact-type printing machines
EP0081334A2 (en) * 1981-12-03 1983-06-15 Xerox Corporation Selectively altering the bulk properties of polymer structures
EP0081334A3 (en) * 1981-12-03 1983-07-20 Xerox Corporation Selectively altering the bulk properties of polymer structures
US4750259A (en) * 1983-11-23 1988-06-14 Honeywell Bull Italia S.P.A. Method of making armature group for mosaic printing head
US4674179A (en) * 1985-01-25 1987-06-23 Mannesmann Ag Making an armature assembly for matrix print heads
US5175922A (en) * 1988-08-01 1993-01-05 Mannesmann Aktiengesellschaft Method for the manufacture of an armature assembly for matrix print heads of the hinged-clapper-armature construction
EP0366498A2 (en) * 1988-10-28 1990-05-02 Oki Electric Industry Co., Ltd. Method of fabricating a biasing plate spring for a wire-dot print head
EP0366498A3 (en) * 1988-10-28 1990-10-03 Oki Electric Industry Co., Ltd. Method of fabricating a biasing plate spring for a wire-dot print head

Also Published As

Publication number Publication date
IT1030786B (it) 1979-04-10
CH575829A5 (it) 1976-05-31
GB1480362A (en) 1977-07-20
CA1002303A (en) 1976-12-28
JPS597582B2 (ja) 1984-02-20
DE2452843A1 (de) 1975-05-15
FR2250638A1 (it) 1975-06-06
JPS5083125A (it) 1975-07-05
DE2452843C2 (de) 1985-01-03
FR2250638B1 (it) 1978-04-28

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