US2771025A - Print impression mechanism - Google Patents

Print impression mechanism Download PDF

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Publication number
US2771025A
US2771025A US389621A US38962153A US2771025A US 2771025 A US2771025 A US 2771025A US 389621 A US389621 A US 389621A US 38962153 A US38962153 A US 38962153A US 2771025 A US2771025 A US 2771025A
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US
United States
Prior art keywords
print
printing
wires
printer head
platen
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
US389621A
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English (en)
Inventor
Harold J Kistner
Otto F Moneagle
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US389621A priority Critical patent/US2771025A/en
Priority to FR1114489D priority patent/FR1114489A/fr
Priority to GB31288/54A priority patent/GB764620A/en
Priority to DEI9316A priority patent/DE1098013B/de
Application granted granted Critical
Publication of US2771025A publication Critical patent/US2771025A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/24—Print head assemblies serial printer type

Definitions

  • a principal object of this invention is to provide an improved print impression mechanism for printing machines.
  • another object of this invention is to provide a print impression mechanism for wire printers for printing impressions, whether of a single character or a plurality of aligned simultaneously imprinted characters, of uniformly good quality.
  • a specific object of this invention is to provide a wire printer having a movable platen and a coacting movable printer head.
  • Fig. 1 is a somewhat diagrammatic sectional view of a wire printer that embodies the features of this invention. This view illustrates a print wire assembly and a print impression mechanism for a single character position.
  • Fig. 2 is a fragmentary view of a printer head showing the print wires of a cluster of wires displaced to form the letter L.
  • Fig. 3 is a diagram, on an enlarged scale, of the letter L, adapted to be formed by the character pattern print wires.
  • Fig. 4 is a timing diagram.
  • The. wire printing mechanism described herein forms characters from a closely spaced pattern of dots as shown in Fig. 3. Each dot is marked on a record sheet when the end of a print wire is pressed against an inking ribbon adjacent the record sheet.
  • Formation of the characterpattern involves selection of the proper print wires to be projected to form the character pattern.
  • the meansrnecess-ary to form the character pattern on the printer head is not a part of the instant invention, and since this means is described in detail in the aforementioned R. B. Johnson patent application,- for clarity and brevity of description it will be described only briefly herein.
  • the sixty-three print wires 10 form a rectangular cluster at printer head 11 (see Fig. 2), and from this cluster the print wires are fanned out in a series of guides in .a print wire bail 12 to form a single line of wires at relatively large spacing at the other or controlv end 13.
  • each of the print wires is arranged ing 17 is attached to printer head 11 in a close rectangular formation for movement therewith (see Fig. 2), and the other end of each tubular casing is fixed to a stationary tubular casing guide bar 18.
  • Print wire bail 12 is reciproca-ted by cams 19 and 20, whereupon slugs 16 are brought into alignment with nonmovable stop comb during the downward movement of bail 12.
  • each code rod 22 and associated control mechanism is such that as code rod 22 is moved by code rod frame 21 into contact with the control end 13 of print wires 10 by earns 19 and 20, the code rod will have no effect on a given print wire 10 if the control end of the print wire enters a notch in the code rod. If, however, control end 13 of a print wire 10 strikes a high portion of code rod 22, the print wire will be moved within its tubular casing17, and, accordingly, its wire end will protrude above the general level of the cluster of wires at the printer head.
  • code rod 22 may be rotated in increments of 90 to four different positions. It now follows that the aforementioned forty-eight different code rod sections may be obtained by shifting code rod 22 longitudinally to each of twelve index positions. Code rod 22 is biased to a normal position (to the left) by means of a spring 23. This spring permits longitudinal movement of the code rod as well as the necessary rotary movement during adjustment into .a given wire setting position whereupon a character pattern is formed.
  • print wire attached slugs 16 constitutes an inertia device which is overcome by impact of the printing stroke for normalizing at the printing zone the protruding print wire ends of a character pattern in a common printing plane during the printing stroke.
  • cams 19 and 20 have moved code rod frame 21 and consequently code rod 22 downwardly so that none of the print wire control ends 13 are in contact with the code rod, and none of the slugs 16 are in proximity to stop comb -1-5. This permits freedom of movement in a longitudinal direction of the print wires under impact of the printing stroke.
  • code rod 22 sets up print wires 10 so as to form a character pattern between 0 and 180 of the printing cycle.
  • code rod 22 engages control ends 13 of print wires 10 at approximately 25 of the printing cycle.
  • the code rod set-up bails (bails, not shown, for applying a rotary and a longitudinal movement to the code rod) are effective during the latter half of a printing cycle, i. e., from 180 to 360, so as to set up the code rod for the following printing cycle.
  • PRINT IMPRESSION MECHANISM The present invention is embodied in the improved structure of the print impression mechanism which will now be described.
  • tubular casings 17 are secured one to the other, and to printer head 11, so that as cam follower arm 24 (Fig. 1) is caused to oscillate about pivot 25, printer head 11 including the tubular casings is caused to reciprocate accordingly in a longitudinal plane. Due to the frictional engagement between each print wire 10 and its respective tubular casing 17, this reciprocating movement of printer head 11 does not of itself cause a relative movement between a print wire 10 and its respective tubular casing 17. In other words, print wires displaced at the printer head to form a character pattern such as the letter L shown in Fig. 2, will remain so displaced and will not be affected by the movement of the printer head per se.
  • a striker roller 26 is rotatably connected to a stud attached to a striker roller arm 27 which, in turn, is fixed to striker assembly gear 28 through a stud shaft 29 for rotating the aforesaid integral unit.
  • a somewhat resilient steel band platen 30 is supported between striker roller 26 and printer head 11 by a pair of platen guides 31 and 32. Platen 30 is attached at each end to a corresponding platen support 33 and 34 by locking screws 35. It is to be observed that since platen supports 33 and 34 are freely mounted on rods 36 and 37, respectively, the tension of platen 30 may be changed by varying the position of adjusting screws 38.
  • the record sheet, or record sheets, upon which the characters are imprinted, are positioned between platen 30 and inking ribbon 39 which, in turn, is positioned adjacent printer head 11.
  • Cam 39 is attached to printer headgear 40 which is caused-to rotate by any suitable driving means, as is gear 28, so that printer head 11 is caused to reciprocate as cam 11.
  • This action of platen 30 moves the record sheet accordingly in a direction towards printer head 11.
  • the printer head may be operated at a low or intermediate printing speed, the high velocity movement imparted to platen 30 as a result of engagew
  • the selected 'print wire ends at the printer head are caused to project a distance, e. g., .030 inch, to forma character pattern.
  • Print suppression Print suppression may be selectively controlled automatically or manually. Automatic print suppression may be had by energizing print suppression magnet coil 43 shown in Fig. 1, which thereupon attracts armature 44. This action moves connecting link 45 downwardly and pivots print suppression lever 46 in a clockwise direction, whereupon lever 46 engages the cam follower arm extension 47 "of cam follower arm 24. Hence, cam follower roller 41 is prevented from riding on cam 39 and printer head 11 is kept without the printing zone. This positions the character pattern forming print wires away from moving platen so as to preclude printing.
  • Manual print suppression may be had by moving lockout lever 48 in a counterclockwise direction about pivot 49 so that dog 50 enters notch 51 inprinter head 11. This engagement also keeps printer head 11 outside of the printing zone. Lockout lever 48 is maintained in a set position by the engagement of spring biased ball 52 and an associated detent in the said lever.
  • code rod 22 is set up during the period between 180 and 360 so as to be positioned to correspondingly set up selected print wires 10 during the immediately following 0 to 90 period.
  • This print wire setting causes a character pattern to be formed at printer head 11.
  • This character pattern is depicted by print wires 10 protruding from their respective tubular casings 17 which are secured, at one end, to printer head 11 and, at the other end, to stationary tubular casing guide bar 18.
  • printer head 11 is moved toward platen 30 under control of cam follower roller 41 and cam 39. Since striker roller 26 moves in a path concentric to shaft 29 and at an angular velocity five times that of cam 39, at print time, i.
  • platen 6 30 is moved within the printing zone now occupied by printer head 11. This action effects printing upon the record sheet positioned between printer head 11 and platen 30.
  • the ,print impressions obtained on the record sheet, or record sheets, are of uniformly good quality because of the longitudinal movement of print wires 10 to a common printing plane under impact of the printing stroke, and the correct value of impact energy accorded by the high velocity platen 30.
  • printer head 11 is removed from within the printing zone and print wires 10 are restored to their normal position under control of restoring bail 14.
  • code rod 20 is set up for the next printing cycle.
  • the impacts accorded platen 30 during this time by the moving striker roller 26 are of no'etfect because printer head 11 is without the printing zone.
  • a print impression mechanism of the class described in. a cyclically operable printer for printing characters on a record sheet comprising a movable printer head having a cluster of loosely held print elements arranged so that the ends thereof define a character pattern at a printing face, a movable platen, means for moving said printer head towards and away from said platen once each printer cyclefat a rate of speed insuflicient to provide value of printing stroke energy which is suflicient to effect good quality printing, and means for simultaneously therewith moving said platen towards and away from said printer head aplurality of times each printer cycle at a rate of speed insufiicient to provide a value of printing stroke energy which is sufiicient to effect good quality printing, said moving means effectively moving said printer head and said platen simultaneously into a common printing zone once each printer cycle to cause said loosely held print elements and said platen to simultaneously engage the record sheet positioned in the printing zone between the printing face of said printer head and said platen, Whereby the ends of said loosely held
  • a print impression mechanism of the class described print -Wires each having a print end and a control end
  • a movable printer head wherein the print ends of said print wires terminate in a common plane
  • a movable platen means for differentially positioning the control ends of selected ones of said pnint wires to move the print ends thereof relative the common plane so as to define a character pattern at a printing face
  • printing -face engage one side of a record sheetat the same time the other side thereof engages.
  • a print impression mechanism comprising a plurality of print wires each having a print end and a control end, a corresponding plurality of print wire casings within each of which respective print wires are ftictionally engaged, a movable printer head to which said casings are secured so that the print ends of said print wires terminate in a common plane, means operable on the, control ends. of said print wires for actuating selective ones of said print wires to move the same within their respective casings so that the print ends thereof form a character pattern at.
  • actuated print wires being maintained in a character pattern position by the frictional engagement between each print wire and its respective print wire casing, a movable platen, means for moving said platen into a printing zone a plurality of times each machine cycle and at a rate of speed insufficient to provide a value of printing stroke energy which is suflicient to effect good quality printing, and means for moving said printer head into the printing zone once each machine cycle and at a rate of speed insufficient. .to provide a value of printing stroke energy which. is sufiicient to effect good quality printing, said printer head and said. platen moving means causing said printer head and said platen to be moved simultaneously into the printing zone once each machine cycle, whereby the pnint. ends of said print wires forming a character pattern and said platen engage during the simultaneous movement thereof to provide a value of printing stroke energy which is sufiicient to effect 8 good quality printing onthe record sheet of the character pattern at the printing face.
  • a print impression mechanism comprising a plurality of print wires; a corresponding plurality ofpr-int wire casings within each of which respective print wires are frictionally engaged; a movable printer head to which said:casings are secured so that said print wires terminate at one end in a common plane to constitute a printing face; a movable platen including a resilient band, a rotatable arm, and a striker roller attached to one end of said arm for imparting a percussive stroke to said band once for each rotation of said arm so as to move said band into a printing zone; means for rotating said arm; means for actuating selected ones of said print wires to move the same within their respective casings relative to thecornmon plane in order to form a character pattern at the printing face; and means operative in a timed relation to said arm rotating means for moving said printer head into the printing zone so that said band and. the ends of said print wires forming

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  • Handling Of Sheets (AREA)
  • Common Mechanisms (AREA)
US389621A 1953-11-02 1953-11-02 Print impression mechanism Expired - Lifetime US2771025A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US389621A US2771025A (en) 1953-11-02 1953-11-02 Print impression mechanism
FR1114489D FR1114489A (fr) 1953-11-02 1954-10-26 Mécanisme d'impression
GB31288/54A GB764620A (en) 1953-11-02 1954-10-29 Print impression mechanism
DEI9316A DE1098013B (de) 1953-11-02 1954-10-30 Drahtdrucker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US389621A US2771025A (en) 1953-11-02 1953-11-02 Print impression mechanism

Publications (1)

Publication Number Publication Date
US2771025A true US2771025A (en) 1956-11-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US389621A Expired - Lifetime US2771025A (en) 1953-11-02 1953-11-02 Print impression mechanism

Country Status (4)

Country Link
US (1) US2771025A (fr)
DE (1) DE1098013B (fr)
FR (1) FR1114489A (fr)
GB (1) GB764620A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351007A (en) * 1965-10-18 1967-11-07 Control Data Corp Print hammer rapid reset means in high speed printers
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
USB287373I5 (fr) * 1971-09-10 1975-01-28

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE390707B (sv) * 1974-11-06 1977-01-17 Philips Svenska Ab Tryckanordning
IT1070333B (it) * 1976-04-21 1985-03-29 Olivetti & Co Spa Stampante seriale particolarmente per macchine per scrivere elettriche silenziose

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1489015A (en) * 1922-06-15 1924-04-01 John Q Sherman Printing device
US1562893A (en) * 1923-06-30 1925-11-24 Charles C Kruse Recording mechanism
US1572062A (en) * 1922-05-08 1926-02-09 Ahlburg Frank Marking device
US1695271A (en) * 1918-02-11 1928-12-18 Carl A Kellogg Web-printing machine
US1759476A (en) * 1930-03-21 1930-05-20 Congoleum Nairn Inc Work-supporting member for printing machines
US1838584A (en) * 1927-04-08 1931-12-29 Henry J Smith Printing machine
US1902060A (en) * 1928-12-18 1933-03-21 Tabulating Machine Co Printing mechanism
US2184510A (en) * 1938-01-24 1939-12-26 Charles F Adams Stamping wheel
US2524127A (en) * 1946-11-06 1950-10-03 Ibm Printing character forming wires
US2566944A (en) * 1946-09-19 1951-09-04 Ibm Typesetting means in record controlled printing machines
US2632386A (en) * 1949-04-20 1953-03-24 Burroughs Adding Machine Co Wire type printing machine
US2653534A (en) * 1948-06-26 1953-09-29 Burroughs Adding Machine Co Wire character forming printing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580788A (en) * 1946-11-06 1952-01-01 Ibm Selective printing and punching mechanism

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695271A (en) * 1918-02-11 1928-12-18 Carl A Kellogg Web-printing machine
US1572062A (en) * 1922-05-08 1926-02-09 Ahlburg Frank Marking device
US1489015A (en) * 1922-06-15 1924-04-01 John Q Sherman Printing device
US1562893A (en) * 1923-06-30 1925-11-24 Charles C Kruse Recording mechanism
US1838584A (en) * 1927-04-08 1931-12-29 Henry J Smith Printing machine
US1902060A (en) * 1928-12-18 1933-03-21 Tabulating Machine Co Printing mechanism
US1759476A (en) * 1930-03-21 1930-05-20 Congoleum Nairn Inc Work-supporting member for printing machines
US2184510A (en) * 1938-01-24 1939-12-26 Charles F Adams Stamping wheel
US2566944A (en) * 1946-09-19 1951-09-04 Ibm Typesetting means in record controlled printing machines
US2524127A (en) * 1946-11-06 1950-10-03 Ibm Printing character forming wires
US2653534A (en) * 1948-06-26 1953-09-29 Burroughs Adding Machine Co Wire character forming printing machine
US2632386A (en) * 1949-04-20 1953-03-24 Burroughs Adding Machine Co Wire type printing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351007A (en) * 1965-10-18 1967-11-07 Control Data Corp Print hammer rapid reset means in high speed printers
US3400798A (en) * 1967-08-21 1968-09-10 Friden Inc Last character visibility mechanism for a matrix page printer
USB287373I5 (fr) * 1971-09-10 1975-01-28
US3918568A (en) * 1971-09-10 1975-11-11 Suwa Seikosha Kk Printing mechanism

Also Published As

Publication number Publication date
FR1114489A (fr) 1956-04-12
GB764620A (en) 1956-12-28
DE1098013B (de) 1961-01-26

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