US3207067A - Type carrier for high speed printing mechanism - Google Patents

Type carrier for high speed printing mechanism Download PDF

Info

Publication number
US3207067A
US3207067A US218257A US21825762A US3207067A US 3207067 A US3207067 A US 3207067A US 218257 A US218257 A US 218257A US 21825762 A US21825762 A US 21825762A US 3207067 A US3207067 A US 3207067A
Authority
US
United States
Prior art keywords
type
character
faces
face
strokes
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
US218257A
Other languages
English (en)
Inventor
Frank H Schaller
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.)
Sperry Corp
Original Assignee
Sperry Rand Corp
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 to BE636232D priority Critical patent/BE636232A/xx
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to US218257A priority patent/US3207067A/en
Priority to GB31937/63A priority patent/GB989670A/en
Priority to FR944876A priority patent/FR1374447A/fr
Priority to DES86768A priority patent/DE1212324B/de
Priority to CH1025463A priority patent/CH414693A/de
Application granted granted Critical
Publication of US3207067A publication Critical patent/US3207067A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41J1/32—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 parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers

Definitions

  • This invention relates generally to high speed printing devices and, more particularly, to printing devices wherein the type font is arranged on a continuously rotating carrier and printing is achieved on the fly on a print receiving medium disposed between the carrier and type hammers which are driven to impact the print receiving medium along with a suitable transfer medium against the carrier at a selected interval during the carriers rotation.
  • print density of the printed image for a given hammer mass, hammer velocity and paper-ribbon-carbon pack is determined primarily by the nature of the type face, and that for type faces which are identical with respect to the material from which they are formed, depth (relief above base structure) and support, the print density is determined by the relative area of the type face. It will therefore be evident that for a font of type which is similarly formed and supported, the type with relatively small face areas will print relatively dark up to the limit of paper puncture and the type with relatively large face areas will print relatively light up to the point where the ink or carbon is not adequately transferred.
  • the range of face area of the several type is narrowed by reducing the stroke width of the characters nominally having the greater face area and by widening or increasing the stroke width of the characters nominally having the lesser face area.
  • the strokes of each character which are oriented perpendicularly to the direction of type carrier rotation are fashioned thinner than the strokes which are parallel to the direction of type wheel rotation to thereby compensate for the amount of smearing and provide the perpendicularly oriented strokes of the printed character with the same width or boldness as the parallel strokes.
  • FIG. 1 is a sectional View in side elevation of a high speed printing mechanism of the sort to which the invention relates.
  • FIG. 2 is a fragmentary view in enlarged scale of a portion of the type drum of FIG. 1.
  • FIG. 3 is an enlarged view illustrating separately the initial and smear imprint made by one of the character type formed on the surface of the type drum.
  • FIG. 4 is an enlarged fragmentary view of a section of the type drum illustrating variations in the alignment of different character type faces with their respective timing reference points.
  • FIG. 5 is a view similar to FIG. 4 illustrating the variation in height of the character type faces.
  • FIGS. 6 through 9 are each compositive views of different character type faces arranged along side the character imprint produced thereby to illustrate the extent of each imprint which results from the smearing action of the constantly rotating type drum.
  • the mechanism by which printing is effected includes a type carrier in the form of a drum 10 suitably keyed to a continuously rotating shaft 11, the shaft rotating in a counter-clockwise direction in the present instance so as to serially advance type faces 20 (see FIG. 2), arranged columnarly around the periphery of the drum, into registration with a type hammer 12.
  • the print receiving medium 13 which may be paper or other suitable material, is disposed between the head of the print hammer and the type drum, the said medium being supported and fed in line spacing direction by any suitable means such as sprocket wheel 14.
  • a marking transfer medium in web or roll form Disposed between the print receiving medium and the type drum is a marking transfer medium in web or roll form, which may be impregnated either with ink, carbon, or the like, for transferring the image of each character type face to the surface of the print receiving medium when the type hammer 12 is actuated to impact the print receiving medium 13 and marking transfer web 15 against the surface of a selected character type face on the type drum 10.
  • the marking transfer medium 15 is drawn around guide rolls 16 by any suitable feeding mechanism, not shown, and is maintained out of contact with the print drum, except at the print registration area, by arcuate shields 17 mounted in close proximity to the drums surface on each side of the print registration area.
  • the type hammers 12 are driven at selected intervals in a cycle of drum rotation by electromagnetic actuators each of which includes a coil 21 and a pivotally mounted armature 22 which has one arm engaging the shank of the type hammer and thereby causing the print hammer to fire into impacting relation with a selected type face 20 on the drum at the moment that the electromagnetic coil 21 is energized.
  • This action causes the image of the selected character type face to be transferred through the marking medium 15 and reproduced on the print receiving medium 13.
  • this medium could comprise several sheets bound with interleaved marking transfer means, such as carbon paper or the like, in the event that the plural copies of the print receiving medium were desired.
  • the character type faces 20 are arranged about the periphery of the type drum 10 in a series of rows and columns with each column, which runs perpendicularly to the axis of the drum, containing a full complement of type faces including one for each letter of the alphabet, each numeral in addition to each commonly used punctuation mark.
  • the several columns of type faces are arranged in the present instance, but which arrangement is not essential to the inventive concept herein disclosed, in alternately offset relationship in a checkboard array with the result that each character occupies two adjacent rows extending in a direction parallel to the drum axis.
  • Associated with each row of character type faces 20 is a raised bar-like structure 23 formed on the drum surface which is utilized, when setting up the mechanism, for registering'each row of type faces with the type hammer firing time control means,
  • bar structure 23 may be considered as providing a timing control reference point for its associated row of character type faces.
  • FIG. 3 shows the imprint for the character H in enlarged scale indicating that portion of the imprint formed by the initial impact of the type hammer separately from that portion of the imprint caused by the smearing action by the rotating type face during the contact time of the type hammer against the type face.
  • the character imprint may be considered as being composed of strokes which in the case of the character H consist of two vertical strokes 31i, 321' connected by a horizontal stroke 331'.
  • the stippled areas 31s, 32s constitute the smear produced by the vertical strokes of the character type face during contact time while the stippled area 33s represents the smear produced by the horizontal stroke of the type face during contact time.
  • FIGS. 6 through 9 illustrate the configuration of several other character type faces 20 in relation to the resulting image reproduced therefrom.
  • the type face consists of a vertical stroke 41 and horizontal strokes 42, 43, 44 which reproduce an image consisting of the exact replica of the character type face, comprising the vertical stroke area 411' and horizontal areas 421', 43i, 44i, in addition to the imprint smear areas 42s, 43s, 44s.
  • the character type face is comprised of a vertical stroke 45, horizontal stroke 46 and a diagonal stroke 47.
  • both the horizontal stroke 46 and the diagonal stroke 47 are fashioned of reduced thickness from that of the vertical stroke 45 so that in the reproduced image the smeared areas 47s and 46s provide the diagonal and horizontal strokes with the same thickness or boldness as the vertical stroke 45i.
  • the type face consists of a horizontal stroke 51, a vertical stroke 52 and a curvilinear stroke 53.
  • the horizontal stroke 51 is similarly fashioned of reduced thickness from that of the vertical stroke 52 so that in the resulting image this stroke, including the smear area 51s, will appear with the same boldness as the vertical stroke image 521.
  • the curvilinear stroke 53 of the character 5 type face since it includes both horizontal and vertical segments, is fashioned with the horizontal segment thereof reduced in thickness from the vertical segment thereof so that in the resulting reproduced image the entire stroke including the smear areas 53s will appear with uniform thickness which also cor-responds to the thickness of the vertical stroke 521.
  • the character type face is comprised of curvilinear strokes 55, 56.
  • these strokes are fashioned to render the horizontal segments thereof reduced in thickness from that of the vertical segments, with the strokes graduated in thickness between the horizontal and vertical segments, so that in the reproduced image, comprised of identical imprint areas 551, 561' and smear imprint areas 55s, 56s, all segments of the curvilinear strokes comprising the image of the character 9 will appear with uniform thickness or boldness.
  • the contact time is dependent upon the face area of the character type face, with the characters possessing the lesser type face area having a longer contact time and consequently producing a greater extent of smear than the characters having a greater type face area. Accordingly, variations in character height will appear along the bottom edge of the character imprints, which is the line of sight by which a line of characters is most effectively judged for character alignment.
  • various rows of character type faces may be arranged on the type drum 10 in slightly offset relation to their timing reference points so that the bottom edges of all character imprints will appear on the print receiving medium in correct lateral alignment.
  • FIG. 4 is marked to indicate the height, h, of the character type faces which in this instance is uniform for all characters on the type drum and in the present disclosed embodiment amounts to one hundred thousandths of an inch for all characters shown.
  • FIG. 4 is also marked to show the lead distance, I, from the bottom edge of the character type face to the center line of the timing reference bars 23 associated therewith.
  • the type face for character C has the least face area, and that of character A has a face area between that of character C and character B. Accordingly, the lead distance, I, for character C is slightly less than that for character A which in turn is slightly less than that for character B since, as heretofore mentioned, the amount of smear produced by the character C type face will be slightly greater than that for character A which in turn will be slightly greater than that for character B.
  • the lead distance, 1 between the bottom edge of a character type face and the associated timing reference point in accordance with type face area all character imprints will appear in lateral alignment on the print receiving medium.
  • the same result can alternatively be attained by maintaining uniformity in the spacing of successive rows of type faces and offsetting the timing reference bars 23 relative thereto so as to provide the appropriate lead distance, I, for each row.
  • the image reproduced from the character L type face will appear uniform in height with that of the image produced by the character M type face.
  • the lead distance, I, for the character L type face from its associated timing reference point 23 is slightly less than that for the character M, for reasons heretofore explained, so that the images produced by the L and M type faces will not only be in horizontal alignment along their bottom edge but will also be of uniform height.
  • the extent to which horizontal type face strokes are reduced in boldness from the vertical strokes will vary in accordance with total type face area, since the extent of smearing is greater in the case of type faces of lesser face area.
  • the range of type face areas among the several characters is preferably reduced in order to achieve more uniform density of the printed image, since if all character type faces were formed to print in equal boldness the wide variation in type face areas would produce a correspondingly wide variation in the print density of the various characters.
  • the type faces having lesser face area are fashioned bolder than the type faces having greater face area, and this can be seen by reference to FIGS.
  • a type carrier adapted for continuous rotation in an impact on the fly form of high speed printing mechanism having type hammer means and actuator means for impelling said hammer means to impact a print receiving medium and a marking transfer medium against the rotating periphery of said carrier, the surface of said carrier being formed with raised type faces for a plurality of characters having a corresponding variety of type face areas, said type faces being arranged in rows and columns with each row containing type faces for the same character, means defining a row firing time reference point associated with each of said rows for registering its respective row of type faces with said actuator means, each of said rows being relatively offset in a columnwise direction from a row firing time reference point to an extent corresponding to the type face area of a type face in the respective row, whereby the smear produced in the resulting character image imprint results in placing one edge of all character imprints of a printed line in alignment.
  • a type face defines a configuration of line strokes variously oriented relative to the direction of type face motion and including a curvilinear stroke, the segments of said curvilinear stroke oriented perpendicularly to the direction of type face motion being reduced in thickness from the segments oriented parallel to the direction of type face motion, whereby the entire curvilinear stroke of the resulting character image appears uniform in width.
  • a type carrier adapted for continuous rotation in an impact on the fly form of high speed printing mechanism having type hammer means and actuator means for impelling said hammer means to impact a print receiving medium and marking transfer medium against the rotating periphery of said carrier, the surface of said carrier being formed with raised type faces for a plurality of characters having a corresponding variety of type face areas, said type faces being arranged in rows and columns with each row containing type faces for the same character, means defining a row firing time reference point associated with each of said rows for registering its respective row of type faces with said actuator means, each of said rows being relatively offset in a columnwise direction from a row firing time reference point to an extent corresponding to the type face area of a type face in the respective row, each of said type faces defining a configuration of line strokes variously oriented relative to the direction of type face motion, said strokes being fashioned in varying widths in inverse relation to the extent that the stroke deviates from a plane parallel to the direction of type face motion, whereby all strokes of the
  • a type carrier adapted for continuous rotation in an impact on the fly form of high speed printing mechanism having type hammer means and actuator means for impelling said hammer means to impact a print receiving medium and a marking medium against the rotating periphery of said carrier, the surface of said carrier being formed with raised type faces for a plurality of characters having a corresponding variety of type face areas, said type faces being fashioned to present a configuration of line strokes for reproduction on said print recording medium by the impact force of said ham mer means, the line strokes for the several characters varying in width in inverse ratio to the respective type face areas of the several characters, whereby the reproduced images of the several characters will appear more uniform in density.
  • each line stroke configuration of a type face comprises strokes variously oriented relative to the direction of type face motion, the strokes perpendicularly oriented being fashioned in reduced width from those oriented parallel to said direction of motion to thereby produce a printed image in which the corresponding line strokes are more nearly uniform in width.

Landscapes

  • Printing Methods (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Handling Of Sheets (AREA)
US218257A 1962-08-21 1962-08-21 Type carrier for high speed printing mechanism Expired - Lifetime US3207067A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE636232D BE636232A (fr) 1962-08-21
US218257A US3207067A (en) 1962-08-21 1962-08-21 Type carrier for high speed printing mechanism
GB31937/63A GB989670A (en) 1962-08-21 1963-08-13 Type carrier for high speed printing mechanism
FR944876A FR1374447A (fr) 1962-08-21 1963-08-16 Support de caractères pour mécanismes imprimeurs à grande vitesse
DES86768A DE1212324B (de) 1962-08-21 1963-08-16 Typentraeger fuer Schnelldrucker mit fliegendem Druck
CH1025463A CH414693A (de) 1962-08-21 1963-08-20 Typenträger für Schnelldrucker mit fliegendem Druck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US218257A US3207067A (en) 1962-08-21 1962-08-21 Type carrier for high speed printing mechanism

Publications (1)

Publication Number Publication Date
US3207067A true US3207067A (en) 1965-09-21

Family

ID=22814387

Family Applications (1)

Application Number Title Priority Date Filing Date
US218257A Expired - Lifetime US3207067A (en) 1962-08-21 1962-08-21 Type carrier for high speed printing mechanism

Country Status (6)

Country Link
US (1) US3207067A (fr)
BE (1) BE636232A (fr)
CH (1) CH414693A (fr)
DE (1) DE1212324B (fr)
FR (1) FR1374447A (fr)
GB (1) GB989670A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282204A (en) * 1964-05-15 1966-11-01 Sperry Rand Corp High speed printing device for printing characters of different physical sizes
US3283702A (en) * 1964-04-20 1966-11-08 Potter Instrument Co Inc High speed printing and graph plotting machine
US3313390A (en) * 1965-01-18 1967-04-11 Anelex Corp Printing machine incorporating spacedfont print roll, and method of printing
US3322064A (en) * 1966-06-02 1967-05-30 Anelex Corp Print drum type matrix and sequential line printing control
US3739720A (en) * 1970-10-06 1973-06-19 Electronic Data Preparation Co Method of selective high speed printing using letters with flared limbs and gaps to compensate for smearing
US3869980A (en) * 1973-08-10 1975-03-11 Cordura Corp High speed data processor line printer
US4102268A (en) * 1975-06-30 1978-07-25 Dataproducts Corporation Impact printer type character
DE2808322A1 (de) * 1977-02-28 1978-08-31 Canon Kk Drucker
US4400106A (en) * 1974-11-29 1983-08-23 Patology Press, Ltd. Typesetting apparatus
US4480935A (en) * 1980-07-23 1984-11-06 Canon Denshi Kabushiki Kaisha Printing type drum

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1579694A (en) * 1918-08-17 1926-04-06 Naamlooze Vennootschap Machina Typewriter type
US2248522A (en) * 1939-04-18 1941-07-08 Ivan W Conrad Automatic telegraphy
US2714352A (en) * 1951-09-18 1955-08-02 Stanley M Rookyard Apparatus for preparing make-ready mats for curved plates
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2894613A (en) * 1956-01-19 1959-07-14 Waldemar A Ayres Even printing manual typewriter
US2997632A (en) * 1958-09-12 1961-08-22 Jr Francis H Shepard Hammer firing circuit for high speed printer
US3024723A (en) * 1960-05-27 1962-03-13 Potter Instrument Co Inc Logical system for a high speed printer
US3034806A (en) * 1958-11-19 1962-05-15 Paul C Squires Digit displays

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1579694A (en) * 1918-08-17 1926-04-06 Naamlooze Vennootschap Machina Typewriter type
US2248522A (en) * 1939-04-18 1941-07-08 Ivan W Conrad Automatic telegraphy
US2714352A (en) * 1951-09-18 1955-08-02 Stanley M Rookyard Apparatus for preparing make-ready mats for curved plates
US2776618A (en) * 1953-06-11 1957-01-08 Hughes Aircraft Co Printing cylinders for high-speed printing systems
US2894613A (en) * 1956-01-19 1959-07-14 Waldemar A Ayres Even printing manual typewriter
US2997632A (en) * 1958-09-12 1961-08-22 Jr Francis H Shepard Hammer firing circuit for high speed printer
US3034806A (en) * 1958-11-19 1962-05-15 Paul C Squires Digit displays
US3024723A (en) * 1960-05-27 1962-03-13 Potter Instrument Co Inc Logical system for a high speed printer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283702A (en) * 1964-04-20 1966-11-08 Potter Instrument Co Inc High speed printing and graph plotting machine
US3282204A (en) * 1964-05-15 1966-11-01 Sperry Rand Corp High speed printing device for printing characters of different physical sizes
US3313390A (en) * 1965-01-18 1967-04-11 Anelex Corp Printing machine incorporating spacedfont print roll, and method of printing
US3322064A (en) * 1966-06-02 1967-05-30 Anelex Corp Print drum type matrix and sequential line printing control
US3739720A (en) * 1970-10-06 1973-06-19 Electronic Data Preparation Co Method of selective high speed printing using letters with flared limbs and gaps to compensate for smearing
US3869980A (en) * 1973-08-10 1975-03-11 Cordura Corp High speed data processor line printer
US4400106A (en) * 1974-11-29 1983-08-23 Patology Press, Ltd. Typesetting apparatus
US4102268A (en) * 1975-06-30 1978-07-25 Dataproducts Corporation Impact printer type character
DE2808322A1 (de) * 1977-02-28 1978-08-31 Canon Kk Drucker
US4480935A (en) * 1980-07-23 1984-11-06 Canon Denshi Kabushiki Kaisha Printing type drum

Also Published As

Publication number Publication date
DE1212324B (de) 1966-03-10
GB989670A (en) 1965-04-22
CH414693A (de) 1966-06-15
BE636232A (fr)
FR1374447A (fr) 1964-10-09

Similar Documents

Publication Publication Date Title
US3941051A (en) Printer system
US3353481A (en) High speed printer drum with print plate mounting means
US3207067A (en) Type carrier for high speed printing mechanism
US3261284A (en) Non-impact electrostatic printer
US3734012A (en) Selective roller inker means for high speed selective type drum
US3838250A (en) Control for a matrix printing assembly
US3918567A (en) Process printing
US3804008A (en) Hammer actuating mechanism and drum design for printers
US3874285A (en) Printer
US3715978A (en) Printer hammer mechanism
US2869454A (en) Inking system for high speed printers
US3285164A (en) High speed printing apparatus
GB1343570A (en) Printers roller bearing for supporting a longitudinally movable part on another part
US3308749A (en) Print impression control for specially configured type elements
US3604347A (en) Print hammer impact tip
US3621778A (en) Type slug mounting for high speed chain printer
US3759174A (en) Print hammer striking moving type at an angle to compensate for frictional force
US3750794A (en) High speed print drum with traveling print hammer
US4359937A (en) Dot matrix printer
US3739720A (en) Method of selective high speed printing using letters with flared limbs and gaps to compensate for smearing
US3353482A (en) Flexible type mounts in high speed printing machines
US3665852A (en) High speed front impact printer
US4102268A (en) Impact printer type character
US2771025A (en) Print impression mechanism
US3317017A (en) Printer with rolling anvil member