US3517611A - Dual impact means for print hammers in high speed printers - Google Patents

Dual impact means for print hammers in high speed printers Download PDF

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Publication number
US3517611A
US3517611A US754417A US3517611DA US3517611A US 3517611 A US3517611 A US 3517611A US 754417 A US754417 A US 754417A US 3517611D A US3517611D A US 3517611DA US 3517611 A US3517611 A US 3517611A
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US
United States
Prior art keywords
impact
printing
coupling
type carrier
hammer
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
US754417A
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English (en)
Inventor
Wolfgang Fink
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3517611A publication Critical patent/US3517611A/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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/10—Hammers; Arrangements thereof of more than one hammer, e.g. one for each character position
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/32—Means for operating hammers to effect impression arranged to be clutched to snatch roll

Definitions

  • the printing speed is primarily determined by the number of characters available and speed of movement of the type carrier, and any increase in printing speed involves an increase inone or other or both of these factors which gives rise to an increase per unit time in the number of characters passing each printing hammer.
  • High-speed printers in which the printing times of the individual printing hammers are determined by a timing pattern produced by mechanical means (e.g. an impact wheel) are so set up that a point of the pattern, which may be defined by the position of a tooth on the impact wheel, is allotted to each character of a moving type carrier phase-locked to said timing pattern.
  • mechanical means e.g. an impact wheel
  • a connection between said mechanical means producing said timing pattern and the printing hammer is produced for a short time by means of a suitable intermediate member, known as a coupling member.
  • the time which is available for establishing this connection depends upon the number of characters passing the printing hammer in unit time. To increase the printing speed it is necessary to be able to shorten the time for making the connection and it is not possible to do this indefinitely for various reasons such as those due to mechanical tolerances.
  • an object of the invention is to increase the speed of a high-speed printer using a flying printing hammer.
  • the invention therefore consists in a high-speed printer using flying printing hammers in which the printing times of the individual printing hammers are determined by a timing pattern produced by mechanical means wherein two interlaced timing patterns are produced by two mechanical means each of which can be connected through its individual coupling member to the common printing hammer allotted thereto.
  • the printing speed is thus increased since by the use of two mechanical means which produce exactly interlaced timing patterns, the interval between the timing points in the overall timing pattern is halved in comparison with a system producing only one timing pattern,
  • FIG. 1 is a diagrammatic side elevational view schematically illustrating one form in which my invention may be embodied.
  • FIG. 2 is an enlarged fragmentary detail view diagrammatically illustrating the manner in which the coupling member is engaged with the impact wheel to actuate a printing hammer by rotation of the wheel.
  • two mechanical timing and actuating means in the form of impact wheels 1, 2 one on either side of the printing position are suitably mounted on the frame for the printer on shafts 1 and 2 respectively to rotate in a fixed relationship relative to a rotating type carrier 25 in the directions shown by the two arrows. That is, the two impact wheels 1 and 2 are positioned on opposite sides of a printing hammer 11 and driven to rotate in opposite directions at the same rates of speed.
  • the impact teeth of one of the wheels are staggered relative to those of the other by half a tooth when related to the co-operating coupling members 3 and 4 and provide interlaced timing pattterns as said impact wheels 1 and 2 are synchronously rotating towards each other and away from the type carrier 25.
  • the two coupling members 3 and 4 are slidably guided between stops 5 and 7 or 6 and 8 respectively and are rectilinearly movable between said stops in their longitudinal directions and are pivotally movable about said stops upon engagement of a coupling member with an associated impact wheel.
  • the stops 5 and 7 and 6 and 8 may be suitably supported on the frame for the printer in a manner which need not herein be shown or described, since it forms no part of the present invention.
  • the coupling members For fixing their position in longitudinal direction, the coupling members have outwardly extending projections 3a and 4a respectively, which are held against the stops 7 and 8 by means of leaf springs 9 and 10.
  • a common printing hammer 11 associated with both coupling members holds the ends 3b and 4b of the coupling members against the stop 14.
  • a return spring 12 extends along a slotted portion 12 of the hammer and is seated at one end on a guide member 13 extending through the slot 12 and suitably mounted in the frame for the printer.
  • the spring 13 is a compression spring and returns the hammer to a rest position by its stored up energy after the printing operation has been carried out.
  • the two armature levers 17 and 18 respectively of release magnets 23, 24 are rotatably mounted at the pivots 15 and 16 are suitably mounted on the frame for the machine and are held in their rest positions against fixed stops 21 and 22 respectively by means of compression springs 19 and 20. Movements of the armature levers are transmitted to the coupling members through the projections 30 and 40 on the coupling members.
  • either the release magnet 23 or the release magnet 24 is energised, depending upon whether an even number or an odd number character is to be printed.
  • the associated armature lever is pivoted and the related coupling member rectilinearly moved to engage between the teeth of an associated impact wheel.
  • the operating time for the magnet system is so selected that a coupling member is shifted into a tooth gap of the associated rotating impact Wheel each time the associated magnet is energized.
  • the next arriving impact tooth now rotates the coupling member about an associated stop 7 or 8 which acts as a pivot, and thus sets in motion the printing hammer 11 for carrying out the printing.
  • the impact members are toothed impact wheels having equally spaced teeth extending thereabout, one impact wheel being on each side of the centerline of said printing hammer and the teeth of one wheel being angularly advanced relative to the teeth of the other wheel, and individually operating said coupling means in sequence to angularly move toward the type carrier and effect successive operation of said printing hammer.
  • the coupling means are guided for reetiliner movement toward and from said impact members and for angular movement toward said type carrier, and
  • the means biasing said printing hammer away from said type carrier comprises a spring, biasing said printing hammer into engagement with said coupling means
  • spring means bias said coupling means out of engagement with said toothed wheels
  • electromagnetic means successively engage said coupling means between two teeth of said impact wheels to eflect angular movement of said coupling means toward said type carrier and strike said hammer with said type carrier with an impact blow.
  • spring means bias said coupling means toward each other
  • electromagnetic means move said coupling means against said spring means to engage between two teeth of an associated impact wheel.
  • the impact members are impact wheels having a plurality of equally spaced teeth extending thereabout and driven at the same rates of speed and in timed relation with respect to the speed of said type carrier,
  • said coupling means extend along the opposite end of said printing hammer from said type carrier and are movable therealong toward and from each other,
  • spring members bias said coupling means out of engagement with the teeth of said impact wheels
  • angularly movable members move said coupling members into the space between two teeth of said toothed wheels to be successively angularly moved thereby to move said hammer to strike said type carrier with an impact.
  • spring means move said angularly movable members toward each other in position to be inelfective to operate said coupling means
  • electromagnetic means move said angularly movable members in directions toward said impact Wheels to successively engage said coupling means in the space between two teeth of said toothed wheels.

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  • Character Spaces And Line Spaces In Printers (AREA)
US754417A 1967-08-24 1968-08-21 Dual impact means for print hammers in high speed printers Expired - Lifetime US3517611A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES0111506 1967-08-24
DE1549879 1967-08-24

Publications (1)

Publication Number Publication Date
US3517611A true US3517611A (en) 1970-06-30

Family

ID=25752915

Family Applications (1)

Application Number Title Priority Date Filing Date
US754417A Expired - Lifetime US3517611A (en) 1967-08-24 1968-08-21 Dual impact means for print hammers in high speed printers

Country Status (3)

Country Link
US (1) US3517611A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1577100A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6811924A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805695A (en) * 1972-09-18 1974-04-23 Teletype Corp Armature mounting assembly for a teleprinter
US3805696A (en) * 1972-03-03 1974-04-23 Nihon Postal Franker Co Ltd Ink printing device for use in drum type line printers
US3822641A (en) * 1972-07-03 1974-07-09 Teletype Corp Impactor assembly for printers
US3832942A (en) * 1972-04-19 1974-09-03 Ricoh Kk Flying parallel printer for table electronic calculators
US3916786A (en) * 1974-03-13 1975-11-04 Addmaster Corp Drum series printer with type members arrested by staggered stop pawls
US4037532A (en) * 1976-03-08 1977-07-26 Xerox Corporation Hammer assembly
US4106406A (en) * 1976-09-17 1978-08-15 Mohawk Data Sciences Corp. Print hammer apparatus
US4189998A (en) * 1976-09-17 1980-02-26 Mohawk Data Sciences Corp. Print hammer and interposer captivating linkage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766686A (en) * 1953-06-11 1956-10-16 Hughes Aircraft Co High speed electro-mechanical interference-type transducer
US2893313A (en) * 1958-03-17 1959-07-07 George H Pekar High speed printer
US3012499A (en) * 1957-09-26 1961-12-12 Amada Sanae High speed printing system
US3144821A (en) * 1960-10-06 1964-08-18 Ibm Printer apparatus having print force control
US3145650A (en) * 1962-12-03 1964-08-25 Burroughs Corp Recording apparatus
US3255693A (en) * 1959-11-25 1966-06-14 Siemens Ag High speed printer operatively controlled by mechanical impulses
US3386376A (en) * 1965-09-08 1968-06-04 Kienzle Apparate Gmbh Damping means to prevent print hammer rebound

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766686A (en) * 1953-06-11 1956-10-16 Hughes Aircraft Co High speed electro-mechanical interference-type transducer
US3012499A (en) * 1957-09-26 1961-12-12 Amada Sanae High speed printing system
US2893313A (en) * 1958-03-17 1959-07-07 George H Pekar High speed printer
US3255693A (en) * 1959-11-25 1966-06-14 Siemens Ag High speed printer operatively controlled by mechanical impulses
US3144821A (en) * 1960-10-06 1964-08-18 Ibm Printer apparatus having print force control
US3145650A (en) * 1962-12-03 1964-08-25 Burroughs Corp Recording apparatus
US3386376A (en) * 1965-09-08 1968-06-04 Kienzle Apparate Gmbh Damping means to prevent print hammer rebound

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805696A (en) * 1972-03-03 1974-04-23 Nihon Postal Franker Co Ltd Ink printing device for use in drum type line printers
US3832942A (en) * 1972-04-19 1974-09-03 Ricoh Kk Flying parallel printer for table electronic calculators
US3822641A (en) * 1972-07-03 1974-07-09 Teletype Corp Impactor assembly for printers
US3805695A (en) * 1972-09-18 1974-04-23 Teletype Corp Armature mounting assembly for a teleprinter
US3916786A (en) * 1974-03-13 1975-11-04 Addmaster Corp Drum series printer with type members arrested by staggered stop pawls
US4037532A (en) * 1976-03-08 1977-07-26 Xerox Corporation Hammer assembly
US4106406A (en) * 1976-09-17 1978-08-15 Mohawk Data Sciences Corp. Print hammer apparatus
US4189998A (en) * 1976-09-17 1980-02-26 Mohawk Data Sciences Corp. Print hammer and interposer captivating linkage

Also Published As

Publication number Publication date
FR1577100A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-08-01
NL6811924A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-02-26

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