US3647040A - Single printing element positioning mechanism - Google Patents

Single printing element positioning mechanism Download PDF

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Publication number
US3647040A
US3647040A US858696A US3647040DA US3647040A US 3647040 A US3647040 A US 3647040A US 858696 A US858696 A US 858696A US 3647040D A US3647040D A US 3647040DA US 3647040 A US3647040 A US 3647040A
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US
United States
Prior art keywords
axis
type
support member
type body
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
US858696A
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English (en)
Inventor
Hermann Waldenburger
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 GmbH
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
Priority claimed from DE19681786405 external-priority patent/DE1786405C/de
Application filed by Triumph Werke Nuernberg AG filed Critical Triumph Werke Nuernberg AG
Application granted granted Critical
Publication of US3647040A publication Critical patent/US3647040A/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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/50—Type-face selected by combinations of two movements of type carrier
    • B41J7/52—Type-face selected by combinations of two movements of type carrier by combined rotary and sliding movement
    • 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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/54—Selecting arrangements including combinations, permutation, summation, or aggregation means
    • B41J7/56—Summation devices for mechanical movements
    • B41J7/60—Levers

Definitions

  • ABSTRACT A mechanism for high-speed printing characterized by a low [30] Foreign A plicati P i i D m mass typte body poslitionable agout firstdand second intersecting axes or type so ection, an mounte on support structure Sept. 28, I968 Germany up 86 405.0 Swingable about a third axis parallel to t first to effect prinb ing of a selected type character.
  • the mechanism is con [52] US.
  • Such type bodies generally employ a universal joint connection within the type body to accommodate concomitant movement about two axes to selectively position a character for printing.
  • the movement of the type body from rest to printing position against the platen must not have a disturbing effect on the type selective movements of the type body as a result of combined relative motions of elements in the mechanical system. Further in such machines extreme accuracy of parts is necessary; I
  • the size of the universal joint parts are restricted by the size of the type body, so that extremely tight fitting parts are required to assure accurate type positioning.
  • the operating speed of the type body must be correlated to the ability with which the universal joint parts and other elements can be accelerated and decelerated without causing undue inaccuracies in the typepositioning movements of the type head due to strain and operating play of parts.
  • motion-transmitting articulate connections which are so located and arranged and are of such a nature as to permit the positioning motions of the type body to be effected accurately and reliably at high operating speeds as well as economically. Necessarily this calls for an organization and arrangement of elements wherein the masses associated with the moving type carrier are relatively small and thus the use of a heavy universal joint structure within the restricted confines of the type head must be avoided.
  • An especially advantageous embodiment of the invention reduces to a minimum relative movement of the articulate connections for positioning the type body while the type body support is moving forward about a given printing axis to bring a selected type on the body to printing position. This is arranged by locating the printing axis midway of the absolute magnitude of excursions which said articulate connections execute under control of cumulatively driven positioning members.
  • the cumulatively driven positioning members are guided in a plane as close as possible to that of the plane of operation of the articulate connections which plane of operation includes the axis about which the type body is swung to print position.
  • Such guidance is advantageously attained in a simple manner by rotatably mounting toward the end of the pivotally supported cumulative positioning levers a joint bolt at or near said articulate connections and to guide it to move along rigidly supported studs.
  • FIG. I is a perspective view showing a ball-like type-bearing body which has been moved about a print axis to a printing position and during which motion a type-selective movement about two positioning axes has taken place;
  • FIG. 2 is a sectional left-hand side view showing that portion of the mechanism in FIG. I which serves to turn the type-bearing body about a first positioning axis parallel to'the axis of the platen to present different rows of type at the level of a printing point; and
  • FIG. 3 is a sectional left-hand side view showing that portion of the mechanism seen in FIG. 1 which serves to effect movement of the type body about a second positioning axis to present different columns of type thereon at a printing point.
  • FIG. 1 a type body of generally ball form comprising two truncated hemispheres l and 2 which are fast on a center shaft 3 which turns on an axis A to present different rows of type characters located thereon.
  • Shaft3 is rotatably mounted at opposite ends in a fork member 4.
  • the hemispheres 1 and 2 are axially slightly spaced, to thereby form a gap to expose a pinion gear 5 rigidly secured to the axle shaft 3 and to accommodate a straight rack 6 which on the edge opposite its teeth is guided by a backup guide roll 7 to be held in a constantly meshed relation with the pinion 5 which is also accommodated within the gap between the hemispheres l and 2.
  • a backup guide roll 7 is on a shaft 7' by which it is rotatably carried in the fork member 4.
  • Integral with the fork member 4 is a carrying tube 8 extending therebelow and having at its lower end a radially extending arm 9 which includes therein a slot 10.
  • the hemisphere 1 is illustrated widely separated from the hemisphere 2 but actually there is only enough room between them for the rack 6 and the guide roll 7 to operate therebetween.
  • the fork 7 member 4 is shown to have a wider spread than it actually has.
  • the tube 8 is rotatably supported in a collar bearing 11 provided on an inverted generally U-shaped bridge 12 which is swingable about a horizontal axis C.
  • Such axis C is located by the provision of downwardly extending legs at the opposite ends of the U-shaped bridge I2 wherein holes 13 and 14 respectively are formed and into which extend related pivot studs 15 carried on a frame (not shown).
  • the type carrier and positioning members 20 and 24 under whose control the type body 1, 2 is positionable to present a selected type opposite a printing point.
  • the secondary member comprising the tube 8, by being mounted in the bearing 11, is turnable on an axis B which, in the embodiment shown extends through axes A and C. By rotary movement of the secondary member 8, 4 about the axis B, different columns of type characters are presented to the printing line.
  • the rack 6 which extends through tube 8 changes in cross section near its lower end into a round rod which has an offset portion 16 reaching into and fastened to a bolt 17 that has pivotal support in a bore 19 of a forked element 18.
  • the latter is carried fast on a character row selection or positioning operating member 20 which by cumulative mechanism, not shown, is driven to position element 18 to one of several selected incremental positions along a path indicated by arrow B.
  • the fork element 18, see FIG. 1, has an additional bore 21 in which another pivot or hinge bolt 22 inwardly of bolt 17 is supported and which is guided along a vertical stud 23 which rises rigidly from a frame member 51 and extends thereinto thereby constraining bolt 22 to move in a straight path.
  • the bolt 17 and bore 19 afford a motion-transmitting articulate connection between the fork 18 of the positioning member 20 and the rack 6 and therefore constitute part of a means whereby the operating member 20 is associated with the type body for turning it about its axis A.
  • the articulate connection afforded by the bolt 17 depending on the position which is given to the operating member 20, will assume any one of a plurality of row-selective positions 36, seven being indicated in FIGS. 1 and 2.
  • FIG. 1 the various possible positions 36 of the articulate connection above and below a midposition of the bolt 17 are indicated laterally projected from the axis B to a dot-dot-dash line B which, as represented in the printing position shown in FIG.
  • the actual possible positions 36 are illustrated as lying along the extended line of axis B which passes squarely through the pivot axis C of the bail 12 about which the type body is swung against the platen 50.
  • the axis B preferably passes through the center of the type body.
  • the articulate connection afforded by the bolt 17 is arranged to move from alignment with axis C to equal maximum extents above and below axis C, e.g., three increments above and three increments below.
  • a second, or type column selection or positioning operating member 24, see FIG. 1, is in control of the tube 8 for positioning the type body 1, 2 to align different type columns with the printing point.
  • the member 24 is adapted to be operated by cumulative mechanism to selected incremental positions along a path indicated by the arrow F in FIG. I.
  • Said member 24 carries rigidly thereon a fork element 25 provided with bores 27 to pivotally support a pivot bolt 26 through which a vertical guide stud 28 extends that is rigidly supported on the frame member 51.
  • the fork element 25 pivotally carries a bolt having a ball 29 intermediate its ends that is accommodated in a fork 30 of an angular lever 31 having a 90 turned relation relative to fork 25.
  • the angular lever 31 has a boss 33' by which it is pivotally carried on a stud 33 carried on a part 32 of the bail 12.
  • a lever arm 34 on the boss 33 has a ball 35 reaching into the slot of the arm 9 on the lower part of the carrying tube 8.
  • the line of positions 37 of the ball bolt 29 as well as the line of positions 36 of the bolt 17 lie substantially within a plane which is common to the axis C and the axis B when the type body has been swung about axisC to printing position.
  • the position of the type body is appropriately established under the control of the positioning members 20, 24 and the simple articulate joints l7 and 29, thereby to accurately position types for printing impact.
  • the mechanism of the invention provides that the relative possible movements of parts in the type-selective control mechanism for the type body is so very negligible that the typing impressions are accurate and distinct and do not result'in objectionable wear in joints.
  • the positioning members 20, 24 are incrementally moved upwardly or downwardly respectively in the direction of the indicated arrows E and F, and either concomitantly or in succession.
  • the motion of the positioning member 20 is transmitted over the articulate connection comprising the bolt 17 and the rack bar 6 which is in mesh with the gear 5, and thereby effects an appropriately measured turning motion about axis A to the type body to select a type row thereon.
  • the positioning member 24 is moved in the direction of the arrow F either upwardly or downwardly to transmit motion over the articulate connection comprising the ball bolt 29, onto the angular lever 31 which by its ball 35 and through the guiding slot 10 in the arm 9 turns the carrying tube 8, and thus the type body about the axis B of the bearing 11.
  • the type head is normally in a retired position indicated by dot-and-dash lines in FIG. 2, sufficiently in front of the platen 50 to render the writing line thereon visible.
  • the stated tuming movements of the type body about axes A and B may take place while the type body is still in normal position in front of the platen or while the type body is being moved about axis C toward the printing point.
  • the bolt 17 (FIGS. 1 and 2) lines substantially within a plane including axes A, B and C. This condition is independent of the various operated positions which the positioning members 20 and 24 may reach.
  • the type body in its movement toward the platen reaches printing position, one of the indicated possible positions 36 of the bolt 17 will be reached which are along the illustrated straight line B which crosses the axes A and C squarely at printing position.
  • the rotary movement of the type body about the axis B through which four selective active positions corresponding to four type columns can be obtained is likewise geometricallyaccurately determined when the type body reaches the print position. Namely, one of the four selective positions of the ball of the bolt 29 will be reached on the illustrated straight line B" in a plane common with the axes C and B (FIG. 1).
  • the total mass each time communicative with the type body is held to a minimum and this is of greatest importance in facilitating high typing speed.
  • the accurate accelerations and decelerations which necessarily are involved are transmitted by articulate connections provided at locations, where due to ample room, the parts can be of simple economical design and structure and can function accurately.
  • the position of the particular type which is to be effective incidental to each typing operation is accurately determined each time under the control of the various positions which the articulations l7 and attain.
  • the nature of the mechanism provides that such relative movements which may take place as the type body reaches printing position is so very minute that the typing impressions are accurately located and distinct and that there is no detrimental strain and wear of parts and joints.
  • a secondary support member mounting said type element for rotation about said first axis to present a selected row of type for printing
  • a primary support member mounting said secondary support member for rotation about said second axis to present a selected column on said type body for printing
  • said primary support member being swingable to a printing position about a third axis external to said type body and parallel to said first axis to print the type at a selected row and column position,
  • said articulate motion-transmitting connections when said positioning members are in a midposition being coincident with said third axis, and in all other positions of said positioning members lying substantially along the line of said second axis extending between said first and third axes when said type body is swung about said third axis to printing position,
  • said means to rotate said secondary support member about said second axis comprising,
  • a bellcrank pivotally carried on said primary support member and having one arm operable by said column positioning member through said motion-transmitting articulate connection connected thereto,
  • said articulate means associating the second arm of said bellcrank with the arm of the secondary support member comprising a ball and fork.
  • said bellcrank having a pivot axis perpendicular to a plane defined by said first and third axes when the type body is in printing position.
  • a secondary support member mounting said type element for rotation about said first axis to present a selected row of type for printing
  • a primary support member mounting said secondary support member for rotation about said second axis to present a selected column on said type body for printing
  • said primary support member being swingable to a printing position about a third axis external to said type body and parallel to said first axis to print the type at a selected row and column position,
  • said articulate motion-transmitting connections when said positioning members are in a midposition being coincident with said third axis, and in all other positions of said positioning members lying substantially along the line of said second axis extending between said first and third axes when said type body is swung about said third axis to printing position,
  • each of said positioning members comprising an arm pivotally mounted with capacity for some endwise movement
  • said means to guide said arm comprising a stud

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  • Handling Of Sheets (AREA)
  • Common Mechanisms (AREA)
  • Pivots And Pivotal Connections (AREA)
US858696A 1968-09-28 1969-09-17 Single printing element positioning mechanism Expired - Lifetime US3647040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681786405 DE1786405C (de) 1968-09-28 Einstellvorrichtung fur einen als Rotationskörper ausgebildeten Typenträger in Schreib oder ahnlichen Maschinen

Publications (1)

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US3647040A true US3647040A (en) 1972-03-07

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Application Number Title Priority Date Filing Date
US858696A Expired - Lifetime US3647040A (en) 1968-09-28 1969-09-17 Single printing element positioning mechanism

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US (1) US3647040A (enrdf_load_stackoverflow)
JP (1) JPS5011808B1 (enrdf_load_stackoverflow)
AT (1) AT300861B (enrdf_load_stackoverflow)
NL (1) NL141125B (enrdf_load_stackoverflow)
SE (1) SE332432B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866735A (en) * 1972-10-26 1975-02-18 Triumph Werke Nuernberg Ag Rotational positioning mechanism for single element printer
US3941228A (en) * 1973-06-13 1976-03-02 Firma Precisa Ag. Rechenmaschinenfabrik Electromagnetically operated printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53123607U (enrdf_load_stackoverflow) * 1977-03-09 1978-10-02

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US477224A (en) * 1892-06-21 pratt
US2661683A (en) * 1948-02-17 1953-12-08 Ibm High speed printing mechanism
US3247941A (en) * 1963-12-20 1966-04-26 Ibm Printing head with means to position head before striking movement begins
US3272302A (en) * 1963-10-17 1966-09-13 Nippon Electric Co Printing mechanism for typewriters having plural typewheels
US3286806A (en) * 1964-09-16 1966-11-22 Olympia Werke Ag Rotatable and tiltable type head control apparatus
US3291041A (en) * 1963-07-24 1966-12-13 Soroban Engineering Inc Page printer mechanism with tilting and travelling print head
US3420350A (en) * 1966-09-03 1969-01-07 Grundig Emv Type head driving means employing flexible belt

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US477224A (en) * 1892-06-21 pratt
US2661683A (en) * 1948-02-17 1953-12-08 Ibm High speed printing mechanism
US3291041A (en) * 1963-07-24 1966-12-13 Soroban Engineering Inc Page printer mechanism with tilting and travelling print head
US3272302A (en) * 1963-10-17 1966-09-13 Nippon Electric Co Printing mechanism for typewriters having plural typewheels
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
US3420350A (en) * 1966-09-03 1969-01-07 Grundig Emv Type head driving means employing flexible belt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866735A (en) * 1972-10-26 1975-02-18 Triumph Werke Nuernberg Ag Rotational positioning mechanism for single element printer
US3941228A (en) * 1973-06-13 1976-03-02 Firma Precisa Ag. Rechenmaschinenfabrik Electromagnetically operated printer

Also Published As

Publication number Publication date
SE332432B (enrdf_load_stackoverflow) 1971-02-08
NL141125B (nl) 1974-02-15
JPS5011808B1 (enrdf_load_stackoverflow) 1975-05-07
NL6909347A (enrdf_load_stackoverflow) 1970-04-01
DE1786405B2 (de) 1972-10-19
DE1786405A1 (de) 1972-03-30
AT300861B (de) 1972-08-10

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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