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US3572238A - Print-head drive - Google Patents

Print-head drive Download PDF

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Publication number
US3572238A
US3572238A US774699A US3572238DA US3572238A US 3572238 A US3572238 A US 3572238A US 774699 A US774699 A US 774699A US 3572238D A US3572238D A US 3572238DA US 3572238 A US3572238 A US 3572238A
Authority
US
United States
Prior art keywords
print
head
print head
cable
slide
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
US774699A
Other languages
English (en)
Inventor
Adolf Andersen
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.)
US Philips Corp
Original Assignee
US Philips 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 claimed from DE19671611474 external-priority patent/DE1611474A1/de
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3572238A publication Critical patent/US3572238A/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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/20—Positive-feed character-spacing mechanisms

Definitions

  • a print head drive for transforming a cable or band transmission to a step-by-step motion.
  • the cable or band transmission imparts an oscillatory motion to a slide element on which a print head is pivotally mounted.
  • the movement of the print head is limited to step-by-step increments by restraining springs.
  • the invention relates to a step-by-step drive of a print head, for example, print heads and drive means such as those shown in U.S. Pat. Nos. 3,236,351 and 3,292,530.
  • Desired synchronization may be obtained by causing the fundamental frequency of the oscillatory system to be considerably higher than the step frequency of the print head.
  • the print-head drive is characterized in that the print-head (which is driven by a band or cable transmission such as known from the referred to patents) guided along the printing surface with the aid of a slide is pivotally connected to said slide by a shaft which is arranged at right angles to the plane in which the slide is guided and extends parallel to the end face of the print head.
  • the print head is connected to the slide by means of springs which are active both in the direction of movement of the slide when the printhead is operating to print on the paper and in the direction opposite thereto.
  • FIG. 1 is a perspective view showing an embodiment of the print-head drive elements according to the present invention
  • FIG. 2 is a diagrammatic representation of print-head displacement versus time
  • FIG. 3 is a diagrammatic representation of slide displacement versus time.
  • the part of a mosaic type print head 3 which is closest to the paper 2 to be written on is driven by a steel cable 4 on a cable drum 1.
  • the relief print head 3 is rotatable about a shaft 5 which extends parallel to the paper and is at right angles to the direction of movement.
  • the shaft 5 is secured to a slide 6 which is arranged on a guide 7.
  • the relief print head 3 is connected to the arm 9 of slide 6 not only by pivots 8 but also by springs 10.
  • the point of fixation 11 of cable 4 and the centre of gravity of the print head 3 are determined.
  • the distance between the pivot 8 and point of fixation 11 of cable 4 determines the magntiude of the maximum forces occurring. All this can be proportioned in such manner that a minimum of forces is achieved.
  • x represents the coordinate of displacement of the endface of the print head and x represents the coordinate of displacement of slide 6, while 1' indicates the time.
  • a step-by-step drive for a print-head in a printing device comprising a print-head for contact with the media to be printed, a cable attached to said print head for moving said print-head, means connected to said cable for same, a guide member arranged parallel to said cable, a slide movably mounted on said guide member for movement in a direction parallel to said cable, an arm attached to said slide, said print-head being pivotally attached to said arm, and a pair of springs, each of said springs attached at one end thereof to said arm and at the other end thereof to opposite sides of said print-head, whereby as said cable is driven said slide will be caused to move in oscillating motion and said print-head will be caused to move in step-by-step motion as a result of the interaction of the connecting elements between said print-head and said slide.

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  • Impact Printers (AREA)
US774699A 1967-11-15 1968-11-12 Print-head drive Expired - Lifetime US3572238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671611474 DE1611474A1 (de) 1967-11-15 1967-11-15 Druckkopfantrieb

Publications (1)

Publication Number Publication Date
US3572238A true US3572238A (en) 1971-03-23

Family

ID=5681725

Family Applications (1)

Application Number Title Priority Date Filing Date
US774699A Expired - Lifetime US3572238A (en) 1967-11-15 1968-11-12 Print-head drive

Country Status (4)

Country Link
US (1) US3572238A (de)
CH (1) CH482365A (de)
FR (1) FR1593215A (de)
GB (1) GB1250665A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759359A (en) * 1971-02-19 1973-09-18 Walther Bueromasch Gmbh Wire matrix printer heads
US3817365A (en) * 1972-08-09 1974-06-18 Triumph Werke Nuernberg Ag Automatic print head shifting device
US4053040A (en) * 1975-10-20 1977-10-11 Mcgourty Thomas K Serial wire matrix printer
US4219280A (en) * 1977-06-27 1980-08-26 Star Seimitsu Kabushiki Kaisha Wire printer
WO1985003033A1 (en) * 1984-01-16 1985-07-18 Roy Jeremy Lahr Rotary printer with off-carriage motor drive
US5032033A (en) * 1985-06-07 1991-07-16 Siemens Aktiengesellschaft Reduced backlash mounting for printer carriages in line printers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759359A (en) * 1971-02-19 1973-09-18 Walther Bueromasch Gmbh Wire matrix printer heads
US3817365A (en) * 1972-08-09 1974-06-18 Triumph Werke Nuernberg Ag Automatic print head shifting device
US4053040A (en) * 1975-10-20 1977-10-11 Mcgourty Thomas K Serial wire matrix printer
US4219280A (en) * 1977-06-27 1980-08-26 Star Seimitsu Kabushiki Kaisha Wire printer
WO1985003033A1 (en) * 1984-01-16 1985-07-18 Roy Jeremy Lahr Rotary printer with off-carriage motor drive
US5032033A (en) * 1985-06-07 1991-07-16 Siemens Aktiengesellschaft Reduced backlash mounting for printer carriages in line printers

Also Published As

Publication number Publication date
CH482365A (de) 1969-11-30
FR1593215A (de) 1970-05-25
GB1250665A (de) 1971-10-20

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