US3924726A - Typehead support for a single element printer - Google Patents

Typehead support for a single element printer Download PDF

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Publication number
US3924726A
US3924726A US350523A US35052373A US3924726A US 3924726 A US3924726 A US 3924726A US 350523 A US350523 A US 350523A US 35052373 A US35052373 A US 35052373A US 3924726 A US3924726 A US 3924726A
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US
United States
Prior art keywords
typehead
platen
support member
printer
support
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
US350523A
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English (en)
Inventor
Herbert Decker
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.)
TA Triumph Adler AG
Original Assignee
Triumph Werke Nuernberg AG
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 Triumph Werke Nuernberg AG filed Critical Triumph Werke Nuernberg AG
Publication of USB350523I5 publication Critical patent/USB350523I5/en
Application granted granted Critical
Publication of US3924726A publication Critical patent/US3924726A/en
Assigned to TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INFORMATIONSTECHNIK reassignment TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INFORMATIONSTECHNIK CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE 8/13/80 Assignors: TRIUMPH WERKE NURNBERG AKTIENGESELLSCHAFT
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
    • B41J1/60—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies on spherical, truncated-spherical, or like surfaces

Definitions

  • a typehead for a single element printer is rotatably B 350,523. supported on a support member which is pivotable to enable the print head to be rotated and tilted for posi- [30] Foreign Application Priority Data tioning a selected type character for printing. Printing Apr.
  • Fig-4 TYPEHEAD SUPPORT FOR A SINGLE ELEMENT PRINTER This invention relates to a single element printer, and more particularly to a support arrangement for the type carrier of a single element printer.
  • a plurality of type characters are typically disposed in circumferential rows on a spherical or barrel-shaped type carrier, hereinafter referred to as a typehead, which is hollow and supported by a member received therein.
  • the typehead is supported for rotational and tilting movements to position a selected type character for printing, and printing is effected by moving the support'member from a normal rest position to a printing position to impact the se lected type character against a cylindrical platen.
  • a component of the impacting force tends to drive the typehead downwardly and tangentially to the cylindrical platen thereby smearing or blurring the printed type character.
  • the typeheads of single element printers have been provided with support arrangements having a support member which'acts radially against thetypehead, as shown'for example in German Disclosure Nos. 1,436,690 and 2,055,924.
  • radial supports have not prevented the.undesirable movement of the typehead which resultsfrom a component of the impacting force.
  • the typehead must be slightly deformed by the impacting force for a radial support to be effective, and the necessary deformation is precluded in the printing of type characters in the upper rows since the typehead is conventionally supported for rotation at the upper portion of the typehead which is usually reinforced for that purpose.
  • an object of the present invention is to provide a support for the typehead of a single element printer which prevents the downward movement of the typehead upon impacting against a platen.
  • FIG. 1 is a partial diagrammatic view of a single element printer constructed in accordance with the present invention and illustrating the impacting of a type character against a platen;
  • FIG. 2 is a sectional view taken along the lines 22 of FIG. 1,
  • FIG. 3 is a partial diagrammatic view of a single element printer similar to FIG. 1 and illustrating an alternative embodiment of a support for the typehead;
  • FIG. 4 is a sectional view taken along the lines 4-4 of FIG. 3.
  • a single element printer for printing type characters on a recording medium, not shown, which may be suitably located on a cylindrical platen 13.
  • the type characters, generally indicated 15, are formed on a sherical or barrel-shaped typehead 17 which is carried on a support means, generally indicated 19, for movement from a normal rest position to a printing position at the platen 13.
  • printing is effected by impacting a se' lected type character against the platen 13, and the typehead 17 may be driven in a printing movement by a suitable drive means, not shown, acting on the support means 19.
  • the support means 19 is mounted on a carriage 21 for movement past the platen 13.
  • the recording medium and the means for driving the typehead 17 in a printing movement as well as other portions of the printer are not shown since they form no part of the present invention and may be desirably conventional.
  • the typehead 17 is generally in the form of an inverted cup having a cylindrical wall 23 and supported at a top portion 25 by the support means 19.
  • the typehead 17 is rotatably supported on the support means 19 by a bolt 27 which is received through a cylindrical opening 29 in the top portion 25 of the type head 17 and secured to a support member 31 which is received in the opening defined by the cylindrical wall 23 of the typehead 17.
  • the support member 31 is pivotally supported on the rocker 33 by suitable bolts 35 for enabling a typehead 17 to be tilted relative to the platen 13, and the rocker 33 is pivoted on the carriage 21 for enabling the typehead 17 to undergo a printing movement to impact a selected type character 15 against the platen 13.
  • the carriage 21 is supported for movement along the platen 13 by a shaft 37 which extends generally paralle'l to the platen 13 andis slidably received through an opening 39 formed in the wall of the carriage 21.
  • a guide rail 41 is slidably received between a pair of flanges 43 formed on the wall of the carriage 21.
  • the type characters 15 are disposed on the typehead 17 in circumferential bands or rows 45 which-are generally concentric with the axis of rotation of the typehead 17 and spaced apart axially from each other.
  • the typehead 17 may be moved by suitable rotating means, generally indicated 47, and tilting means, generally indicated 49.
  • the rotating means 47 may be in the form of a pulley 51 secured to the end of a shaft 53 for rotating the typehead 17 in a conventional manner
  • the tilting means 49 may be in the form of an arm 55 secured as at 56 to the support member 31 for enabling pivotal movement about axis 35.
  • detent formations which correspond to the rotational and elevational positions of the type characters 15 on the typehead 17.
  • the detent formations corresponding to the rotational positions of the type characters 15 are in the form of ratchet teeth 57, located inside the typehead 17 on the internal side of the wall 23 and extending parallel to the axis of rotation of the typehead 17.
  • the detent formations corresponding to the elevational positions of type characters 15 are in the form of indentations 59 on the support member 31. Since detent formations and the manner in which they are used to correctly position the typehead 17 for printing are well-known, no further explanation or description thereof is believed necessary.
  • the smearing of the printed type character is avoided by providingthe support means 19 with an abutment for resisting the downward component of the impactingforce.
  • the support member 31 has an abutment in the form of a projection 61 extending radially, and circumferentially adjacent the inner wall 23 of the typehead 17 at the printing position.
  • the ratchet teeth 57 which extend parallel to the axis of rotation of the typehead 17 have a lower edge 63 which is separated from the projecting abutment 61 by only a narrow air gap. Accordingly, when the typehead l7 impacts against the platen 13, the projecting abutment 61 engages the lower edge 63 of the ratchet teeth 57 so as to prevent the downward movement of the typehead 17 by the component A of the impacting force.
  • the projecting abutment 59 is illustrated and described as acting on a lower edge 63 of the 4 support means pivotally supporting said support member for tilting movement to position a selected row of type characters opposite said platen, said support means being movable from a rest position to a printing position to impact a selected type character against said platen,
  • said lower portion of said typehead having edge defining means located in a radial plane
  • said support member having a radially extending abutment located opposite said platen and located closely beneath said edge defining means for arresting tangential movement of said typehead relative to said platen and said support member on impact of a selected type character against said platen.
  • said edge defining means comprising the bottom edge-of said typehead.
  • said lower portion of said typehead having internal detent formations corresponding to columnar positions of said typehead to finally position a selected column of type characters, the ends of said detent formations comprising said edge defining means, and said abutment having an arcuate portion located beneath the ends of said detent formations.

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US350523A 1972-04-15 1973-04-12 Typehead support for a single element printer Expired - Lifetime US3924726A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2218310A DE2218310A1 (de) 1972-04-15 1972-04-15 Vorrichtung zum abstuetzen von typenkoerpern in schreibmaschinen

Publications (2)

Publication Number Publication Date
USB350523I5 USB350523I5 (ja) 1975-01-28
US3924726A true US3924726A (en) 1975-12-09

Family

ID=5842078

Family Applications (1)

Application Number Title Priority Date Filing Date
US350523A Expired - Lifetime US3924726A (en) 1972-04-15 1973-04-12 Typehead support for a single element printer

Country Status (8)

Country Link
US (1) US3924726A (ja)
JP (1) JPS4919922A (ja)
CH (1) CH535127A (ja)
DE (1) DE2218310A1 (ja)
FR (1) FR2180281A5 (ja)
GB (1) GB1388607A (ja)
NL (1) NL146746B (ja)
SE (1) SE381003B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008794A (en) * 1975-01-16 1977-02-22 Triumph Werke Nurnberg A.G. Type carrier print deflection blocking means for a single-element printer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56158400A (en) * 1980-05-12 1981-12-07 Sanyo Electric Co Voice recognizing device
JPS5919822B2 (ja) * 1980-07-11 1984-05-09 東京重機工業株式会社 タイプライタ−用印字装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926768A (en) * 1958-09-23 1960-03-01 Ibm Single element printing mechanism
US3247941A (en) * 1963-12-20 1966-04-26 Ibm Printing head with means to position head before striking movement begins
US3286806A (en) * 1964-09-16 1966-11-22 Olympia Werke Ag Rotatable and tiltable type head control apparatus
US3406807A (en) * 1966-06-01 1968-10-22 Oki Electric Ind Co Ltd Printer in which type is projected and type head moved toward platen
US3618735A (en) * 1969-12-12 1971-11-09 Ibm Spherical type element support

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH427860A (de) * 1964-09-10 1967-01-15 Olympia Werke Ag Typenkopfeinrichtung für ein magnetelektrisch tastengesteuertes Schreibwerk

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926768A (en) * 1958-09-23 1960-03-01 Ibm Single element printing mechanism
US3247941A (en) * 1963-12-20 1966-04-26 Ibm Printing head with means to position head before striking movement begins
US3286806A (en) * 1964-09-16 1966-11-22 Olympia Werke Ag Rotatable and tiltable type head control apparatus
US3406807A (en) * 1966-06-01 1968-10-22 Oki Electric Ind Co Ltd Printer in which type is projected and type head moved toward platen
US3618735A (en) * 1969-12-12 1971-11-09 Ibm Spherical type element support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008794A (en) * 1975-01-16 1977-02-22 Triumph Werke Nurnberg A.G. Type carrier print deflection blocking means for a single-element printer

Also Published As

Publication number Publication date
NL146746B (nl) 1975-08-15
DE2218310A1 (de) 1973-10-25
JPS4919922A (ja) 1974-02-21
USB350523I5 (ja) 1975-01-28
GB1388607A (en) 1975-03-26
CH535127A (de) 1973-03-31
NL7209657A (ja) 1973-10-17
FR2180281A5 (ja) 1973-11-23
SE381003B (sv) 1975-11-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TRIUMPH-ADLER AKTIENGESELLSLCHAFT FUR BURO-UND INF

Free format text: CHANGE OF NAME;ASSIGNOR:TRIUMPH WERKE NURNBERG AKTIENGESELLSCHAFT;REEL/FRAME:003935/0913

Effective date: 19800813