US3921784A - Printing disc having bifurcated type arms - Google Patents

Printing disc having bifurcated type arms Download PDF

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Publication number
US3921784A
US3921784A US451344A US45134474A US3921784A US 3921784 A US3921784 A US 3921784A US 451344 A US451344 A US 451344A US 45134474 A US45134474 A US 45134474A US 3921784 A US3921784 A US 3921784A
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US
United States
Prior art keywords
arms
disc
fingers
printing disc
printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US451344A
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English (en)
Inventor
Alfreds Orlens
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 US451344A priority Critical patent/US3921784A/en
Priority to CA219,943A priority patent/CA998957A/en
Priority to GB1035875A priority patent/GB1465882A/en
Priority to JP50029634A priority patent/JPS5844478B2/ja
Priority to DE2511284A priority patent/DE2511284C2/de
Application granted granted Critical
Publication of US3921784A publication Critical patent/US3921784A/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

Definitions

  • the matrix is provided [56] References Cited with a plurality of radially extending arms, each of UNITED STATES PATENTS which has at least two type-carrying fingers radially 1,239,687 9/1917 Hanamma 56/400.l7 extendmg therefrom 3,227,258 1/1966 Pannier et a1 197/54 X 3 Claims, 7 Drawing Figures PRINTING DISC HAVING BIFURCATED TYPE ARMS 2 BACKGROUND OF THE INVENTION
  • the radial spokes or arms of conventional type printing discs or matrixes used in certain high speed serial printers are provided with typeelem'entsattheir respective free outer ends and in operation are deflected to a predetermined extent by a suitable hammer means so that said type elements are respectively brought into printing cooperation with a print receiving sheet.
  • cantilevered arms must be rigid enough to taccommodate the rapid angular acceleration and deceleration occurring during the rotational indexing of the'print disc. however they must also be flexible enough to be readily deflected during the above noted printing operations.
  • the relatively high flexing stresses developed at the radially inner ends'of said arms during-printing and- /or indexing operations are apt to cause failure in this region, i.e., where the said arms are joined to the .central hub portion of the disc.
  • this maximum flexing stress may be excessively high where said arms are relatively short but may be reduced in some cases by making the arms longer; the latter being accomplished by reducing the effective diameter of the said central hub portion ofthe disc.
  • the cross sectional size and/or shape of the arms in said region may be decreased or otherwise changed so that the disc material in said region may become structurally weaker and thus less able to withstand the repeated flexing stresses occurring during successive indexing and printing operations.
  • each arm of the instant print disc is given a bifurcated construction whereby the radial outer portion of each arm carries at least two radially extending type-supporting fingers. Further the axial thickness of each arm is increased in the region where its associated fingers join the arm, and each finger is made longer than its associated arm in order to efficiently distribute the stresses existing in each arm as the latter is flexed.
  • the primary object of the instant invention is to provide a novel disc-shaped print matrix which is relatively inexpensive to produce and which is light and rigid enough for effective use in high speed serial printers.
  • a further object of the invention is to provide a novel construction and arrangement for a print disc whereby the maximum operational flexure stresses in the radial arms thereof may be kept at relatively low values.
  • FIG. 1 is a front elevational view illustrating a con ventional type print matrix.
  • FIG. 2 is a cross sectional view taken along section line 2-2 of FIG. 1.
  • FIG. 3 is a front elevational view illustrating another conventional type matrix that is similar to that shown in FIG. 1.
  • each arm 12 is substantially uniform throughout the radial length thereof.
  • the disc 10 is adapted to be rotatably indexed about its axis R, FIG. 2, to bring a selected type elemerit to apredetermined print position after which a suitable hammer action, indicated by arrow 14, FIG. 2, serves to deflect the selected type element through a predetermined fixed distance d and into operative printing engagement with the usual printribbon-and print receiving paper indicated generally by reference 'numeral 15.
  • any bending of the arms 12 occurring during said indexing and printing actions will produce relatively high'flexure stresses in the disc material in the region 17 where eachcantilever I a value of 1 asshown in FIG.
  • FIGS. 5, 6 and 7 there is shown a one-piece print disc 20 which is molded from a suitable plastic material such as Delrin and which includes a central hub portion 21 having a plurality of integral arms 22 radially extending therefrom.
  • the outer end of each arm is integrally formed with a pair of radially extending fingers 23; the arm region at the base of each pair of fingers being axially thickened and reinforced as illustrated at 24 of FIG. 6.
  • a type element 26 Suitably secured to the free outer end of each finger 23 is a type element 26, a circular array of type elements thus being formed.
  • the width of each finger 23 as seen in FIG. 5, is substantially uniform throughout its length and is substantially equal to the corresponding width w of the radial inner portion of the associated arm 22.
  • Each finger 23 is made as long as possible, and preferably is longer than its associated arm 22.
  • the effective radial length 1 FIG. 5, for each composite cantilever support for type elements 26 is shown equal to the corresponding arm length 1 for the disc 10a of FIG. 3 and is effectively defined by the combined radial length of the associated finger 23 and arm 22.
  • there are only half as many arms 22 as type elements 26 so that the said width w of said arms 22 may now be made substantially greater than the corresponding width of arms 12a, FIG.
  • the type disc 20 is adapted to be rotatably indexed about its axis R FIG. 6, to bring a selected type element to a predetermined print position.
  • an associated hammer action, indicated at 30, will cause the selected type element, such as 26x, to be displaced through the same predetermined fixed distance d to a print position as illustrated in said FIG. 7.
  • the adjacent type element 26y supported on the same arm as type element 26x is simultaneously displaced through a relatively short distance towards said print receiving sheet 15, this short displacement however being insufficient to produce any printing action by the type element 26y.
  • the arms 22 thereof may be made rigid enough to accommodate rapid rotational indexing motion occurring during high speed serial printer operations and yet may be flexible enough to be readily deflected to print positions without developing high flexure stresses at the inner ends of said arms.
  • a rotative printing disc for use in a high speed serial printer, said printing disc adapted to be rotatively movable so as to be indexed to any one of several select print positions; said printing disc comprising a central hub portion and a plurality of arms carried by, and substantially radially extending from, said hub portion; each of said arms being bifurcated to provide a pair of outwardly extending type supporting fingers, each of said fingers having an outer end; a separate type element mounted on each of said outer ends; and each finger of each pair of the outwardly extending type supporting fingers being longer than its respective arm.

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  • Impact Printers (AREA)
  • Printing Methods (AREA)
  • Brushless Motors (AREA)
US451344A 1974-03-15 1974-03-15 Printing disc having bifurcated type arms Expired - Lifetime US3921784A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US451344A US3921784A (en) 1974-03-15 1974-03-15 Printing disc having bifurcated type arms
CA219,943A CA998957A (en) 1974-03-15 1975-02-12 Print matrix
GB1035875A GB1465882A (en) 1974-03-15 1975-03-12 Type carrier
JP50029634A JPS5844478B2 (ja) 1974-03-15 1975-03-13 印刷マトリックス
DE2511284A DE2511284C2 (de) 1974-03-15 1975-03-14 Typenscheibe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US451344A US3921784A (en) 1974-03-15 1974-03-15 Printing disc having bifurcated type arms

Publications (1)

Publication Number Publication Date
US3921784A true US3921784A (en) 1975-11-25

Family

ID=23791840

Family Applications (1)

Application Number Title Priority Date Filing Date
US451344A Expired - Lifetime US3921784A (en) 1974-03-15 1974-03-15 Printing disc having bifurcated type arms

Country Status (5)

Country Link
US (1) US3921784A (de)
JP (1) JPS5844478B2 (de)
CA (1) CA998957A (de)
DE (1) DE2511284C2 (de)
GB (1) GB1465882A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127336A (en) * 1976-03-08 1978-11-28 Nippon Telegraph And Telephone Public Corporation Type heads
US4128347A (en) * 1976-05-24 1978-12-05 Alfred Bauer Characters-carrying disc for printing machine, method of manufacturing this disc and mould for carrying out this method
US4165189A (en) * 1977-06-08 1979-08-21 Caracteres S.A. Characters carrying disc for a printing machine
WO2009114477A3 (en) * 2008-03-10 2010-01-21 Andrew Nowicki Torque-handling gear with teeth mounted on flexible arms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112224A (en) * 1974-07-22 1976-01-30 Nippon Telegraph & Telephone Purintano taipuhetsudo
JPS6032125U (ja) * 1983-08-11 1985-03-05 ダイハツ工業株式会社 フユ−エルタンクにおけるサクシヨンチユ−ブのフイルタ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1239687A (en) * 1917-05-24 1917-09-11 Tomokichi Hanamma Lawn-rake.
US3227258A (en) * 1962-07-31 1966-01-04 Pannier Corp Rotary imprinting machine moving selected character to imprinting position by shortest arc
US3356199A (en) * 1966-02-23 1967-12-05 Friden Inc Printer having type disk rotatable in a plane parallel to the printing line
US3643774A (en) * 1969-11-12 1972-02-22 Burroughs Corp Printing mechanism with resiliently backed printing element
US3774531A (en) * 1971-06-21 1973-11-27 Ibm Print chain assembly for high speed printer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH518180A (de) * 1971-02-18 1972-01-31 Europ Handelsges Anst Typen-Druckwerk

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1239687A (en) * 1917-05-24 1917-09-11 Tomokichi Hanamma Lawn-rake.
US3227258A (en) * 1962-07-31 1966-01-04 Pannier Corp Rotary imprinting machine moving selected character to imprinting position by shortest arc
US3356199A (en) * 1966-02-23 1967-12-05 Friden Inc Printer having type disk rotatable in a plane parallel to the printing line
US3643774A (en) * 1969-11-12 1972-02-22 Burroughs Corp Printing mechanism with resiliently backed printing element
US3774531A (en) * 1971-06-21 1973-11-27 Ibm Print chain assembly for high speed printer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127336A (en) * 1976-03-08 1978-11-28 Nippon Telegraph And Telephone Public Corporation Type heads
US4128347A (en) * 1976-05-24 1978-12-05 Alfred Bauer Characters-carrying disc for printing machine, method of manufacturing this disc and mould for carrying out this method
US4165189A (en) * 1977-06-08 1979-08-21 Caracteres S.A. Characters carrying disc for a printing machine
WO2009114477A3 (en) * 2008-03-10 2010-01-21 Andrew Nowicki Torque-handling gear with teeth mounted on flexible arms
US20110079098A1 (en) * 2008-03-10 2011-04-07 Andrew Nowicki Torque-handling gear with teeth mounted on flexible arms
US8468904B2 (en) * 2008-03-10 2013-06-25 Andrew Nowicki Torque-handling gear with teeth mounted on flexible arms

Also Published As

Publication number Publication date
JPS50125825A (de) 1975-10-03
JPS5844478B2 (ja) 1983-10-03
GB1465882A (en) 1977-03-02
DE2511284A1 (de) 1975-09-18
CA998957A (en) 1976-10-26
DE2511284C2 (de) 1984-10-11

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