US3795300A - Printing machine - Google Patents

Printing machine Download PDF

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Publication number
US3795300A
US3795300A US00273128A US3795300DA US3795300A US 3795300 A US3795300 A US 3795300A US 00273128 A US00273128 A US 00273128A US 3795300D A US3795300D A US 3795300DA US 3795300 A US3795300 A US 3795300A
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US
United States
Prior art keywords
printing
cam
spool
hammer
hammer module
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
US00273128A
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English (en)
Inventor
N Matsuzawa
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.)
Nidec Precision Corp
Original Assignee
Nidec Copal 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 Nidec Copal Corp filed Critical Nidec Copal Corp
Application granted granted Critical
Publication of US3795300A publication Critical patent/US3795300A/en
Anticipated expiration legal-status Critical
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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
    • B41J9/04—Hammers; Arrangements thereof of single hammers, e.g. travelling along printing line

Definitions

  • ABSTRACT A printing machine arrangedso that the two kinds of operations, i.e progressive shifting in position of the printing hammer over the rows of printing types and the printing actions by this hammer are carried out by separate drive sources, respectively, and that the hammer module is moved along a rectilinear rod, whereby high speed printing is feasible and highly legible images of the printed types as well as very clear and pleasant distribution of the printed images of types can be obtained. 7
  • the present invention concerns a printing machine, and more particularly, it pertains to a line printer arranged to print types successively by shifting the position of the printing hammer progressively along the printing drum.
  • an object of the present invention to provide a printing machine arranged so that the printing hammer module is moved intermittently for a constant amount at a time along the type-carrying drum, thereby reducing the intervals between the printed images of types.
  • Another object ofthe present invention is to provide a printing machine having the aforesaid features and arranged so that the drive means for the printing hammer and the drive means for shifting the position of the printing hammer module are provided separately relative to each other so that'there are produced, at high speed, clear images of print on a recording paper and also that leaping of rows of printing types can be easily performed whenever required.
  • Still another object of the present invention is to provide a printing machine having the foregoing features and arranged so that when the printing operation of a given single line is completed, the printing hammer will be returned always and positively to the exact predetermined starting position.
  • a further object of the present invention is to provide a mechanism of conveying the printing hammer module, which permits the processing of its parts to be performed easily and permits the manufacture of the parts at a low cost.
  • FIG. 1 is a plan view of the essential parts of the printing machine according to the present invention.
  • FIG. 2 is a fragmentary plan view taken along the line II-II in FIG. 1.
  • reference numeral 1 represents a main body frame.
  • Numeral 2 represents a belt applied to a pulley fixed to the shaft of a drive motor not shown.
  • Numeral 3 represents a shaft rotatably mounted on said frame 1.
  • Numeral 4 represents a pulley fixed on said shaft 3 and having the belt 2 applied thereto.
  • Numeral 5 represents a printing type carrying drum fixed on said shaft 3.
  • Numerals 5a, 5b, 5c, 5n represent rows of characters formed on the circumferential surface of said drum 5.
  • Numerals 6 and 7 represent a roller and a gear fixed on said shaft 3, respectively, and intended for feeding a recording paper.
  • Numeral 8 represents a hammer module.
  • Numeral 8a represents a hammer driven by a drive means such as an electromagnet not shown.
  • Nume'ral 9 represents a supporting shaft supported on said frame 1 and receives said hammer module 8 so that the latter is movable thereon.
  • Numeral 10 represents a spring for conveying the hammer module 8.
  • This spring l0 is attached, by the screw 8b, tothe hammer module 8, and the other end is fixed to a part of the main body after being turned over inwardly of the mechanism in F IG. 1 via a guide member not shown.
  • Numeral 11 represents a shaft rotatably mounted on said frame 1.
  • Numeral 12 represents a gear attached to one end of said shaft 11 via a clutch means 13 such as a known spring clutch and also coupled to the gear 7 via a gear 30.
  • Numeral 13a represents. a stopper groove formed on the spring clutch l3.
  • Numeral 14 represents an electromagnet attached to the frame 1 via a spacer 15.
  • Numeral 16 represents a pole-contacting lever swingably attached to the york portion of the electromagnet-14. This pole-contacting lever 16 has, at one end, a stopper hook 16a extending into the stopper groove 13a of the spring clutch 13, and has a polecontactingportion 16b formed at the other end.
  • Numeral 17 represents a pulley rotatably attached to a supporting member 18 which, in turn, is fixed to the frame 1.
  • Numeral 19 represents a take-up spool. Ratchet teeth 19a are formed on the periphery of one end of this spool 19 and a flange 19b is formed on the other end thereof. This spool-19 is rotatably mounted on the shaft 11.
  • Numeral 20 represents a cam lever rotatably attached at one end to a shaft 19c extending on both sides of the flange 19b of the spool 19. This cam lever 20 has at its intermediate portion a cam face 200 and has an engaging portion 20b formed at the free end thereof.
  • a stud 19d extends from one side of the flange 19b of the spool 19.
  • a spring 21 is applied between said stud 19d and the free end of the cam lever 20.
  • Numeral 22 represents a stopper which is engageable with the engaging portion 20b formed at the free end of the cam lever 20.-This stopper 22 extends from the main body.
  • Numeral 23 represents a cam plate which has a cam face 23a. This cam plate 23 is fixed to said shaft 11 in such a way that its cam face 23a is engageable with the cam face 20a of the cam lever 20.
  • Numeral 24 represents a rope having one end anchored to the screw 80 of the hammer module 8, the other end of which rope is fixed to the spool 19.
  • Numeral 25 represents a drive means such as an electromagnet which is attached to the frame 1 via a spacer 26.
  • Numeral 27 represents a pole-contacting lever, at one end of which is formed a pawl portion 27a meshing with the ratchet teeth 19a of the spool 19 and at the other end is formed a pole-contacting portion 27b. This pole-contacting lever 27 is swingably attached to the york of the electromagnet 25.
  • Numeral 28 represents a spring for urging the polecontacting lever 27 in one direction.
  • Numeral 29 represents an adjusting screw for adjusting the distance between the magnetic pole of the electromagnet 25 and the pole-contacting portion 27b of the pole-contacting lever 27.
  • a recording paper and an ink ribbon which are not shown are interposed between the printing type carrying drum and the hammer 8a.
  • the hammer 8a of the hammer module 8 which is at the position shown in FIG. 1 is actuated, an electromagnet (not shown) which is incorporated in the hammer module 8 and which energizes by a pulse signal generated in synchronism with the rotation of the drum 5, to print the types on the first line.
  • a pulse signal is applied to the electromagnet 25.
  • the pole-contacting lever 27 which is at the position illustrated is caused to swing, with the result that its pawl portion 27a is momentarily disengaged from its meshing with the ratchet tooth 19a of the spool 19.
  • the spool 19 is urged to rotate counter-clockwise in FIG. 2 by the tension of the conveying spring 10.
  • this lever 27 will immediately act in such a way as to cause, instantaneously by the force of the spring 28, the pawl portion 27a to mesh again with a ratchet tooth 19a.
  • the spool 19 will eventually rotate through an amount corresponding to a single tooth among the ratchet teeth 19a. Accordingly, the hammer module 8 will also be moved toward the left in FIG. 1 for a distance corresponding to said amount of a single tooth and stops at this position.
  • This amount of movement covered by the hammer module 8 corresponds to a a type column. More specifically, in the state of the mechanism shown in FIG. 1, the hammer 8 moves to the position corresponding to the row of characters shown at 5b and stops thereat and is thus rendered to be ready to print the character in this row. In this way, characters of the respective rows are printed successively one after another, so that the hammer module 8 moves from its position shown in FIG.
  • the hammer module 8 is quickly returned to its position shown in FIG. 1 by overcoming the tension exerted by the spring 10.
  • the engaging portion 2( )b of the cam lever 20 is again brought into contact with the stopper 22, so that as shown in FIG. 2 the cam face 20a is disengaged from the cam face 23a.
  • the spool 19 is urged to rotate counter-clockwise by the tension of the spring 10.
  • a printing machine comprising:
  • a printing hammer module arranged in adjacent relation to said drum and capable of moving along said drum;
  • a spring having one end coupled to said main body frame and the other end coupled to said printing hammer module to urge said hammer module in its feeding direction;
  • a clutch means connected to said driving member and operative upon completion of the printing action for each type line;
  • a rotary shaft having a cam member forming a first cam face coupled thereto and capable of rotating together with said driving member when said clutch means is operated;
  • a rotatable spool connected to the other end of said rope to wind up said rope
  • cam lever rotatably mounted on said flange and forming a second cam face engageable with said first cam face to rotate said spool when said rotary shaft is rotated;
  • a stopper secured to said frame and capable of engagmove by the extent corresponding to a type coling with said cam lever to disengage the engageumn; ment between said first and second cam faces when a first drive means arranged adjacent to said lever said rope is wound up against the force of said member for controlling the engagement and disenspring by the engagement of said first and second 5 gagement of said lever member with and from said cam faces and when said hammer module is reratchet teeth. turned to'its starting position; 2.
  • a printing machine in which ratchet teeth formed on the periphery of said spool; said first drive means contains an electromagnet.
  • a lever member pivotably supported on said frame 3.
  • a printing machine in which and engageable with said ratchet teeth to cause 10 said clutch means is comprised of a spring clutch coaxisaid spool to rotate by the extent corresponding to ally arranged with said rotary shaft and an electromaga single tooth of said ratchet teeth upon completion net-driving means for controlling the action of said of the printing action by said printing hammer and spring clutch.

Landscapes

  • Common Mechanisms (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US00273128A 1971-07-23 1972-07-19 Printing machine Expired - Lifetime US3795300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971065367U JPS5113927Y2 (forum.php) 1971-07-23 1971-07-23

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US3795300A true US3795300A (en) 1974-03-05

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US00273128A Expired - Lifetime US3795300A (en) 1971-07-23 1972-07-19 Printing machine

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US (1) US3795300A (forum.php)
JP (1) JPS5113927Y2 (forum.php)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027764A (en) * 1975-06-24 1977-06-07 Casio Computer Co., Ltd. Apparatus for confirming the correct impression of printing characters
US4310256A (en) * 1976-07-15 1982-01-12 Alps Electric Co., Ltd. Printers
US4352576A (en) * 1979-07-09 1982-10-05 Alps Patent Department Serial printer having a single drive motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US2919005A (en) * 1959-12-29 Printing apparatus
US3227259A (en) * 1963-08-22 1966-01-04 Mite Corp Electrically operated printer with type body axially movable and rotatable
US3364852A (en) * 1965-11-12 1968-01-23 Friden Inc High-speed print drum with traveling print hammer
US3424291A (en) * 1967-08-28 1969-01-28 Friden Inc Carriage drive for high-speed printer
US3429414A (en) * 1967-04-24 1969-02-25 Scm Corp Printer with print hammer mounted on movable carriage
US3526309A (en) * 1967-06-30 1970-09-01 Singer Co Ink transfer roller with ink supply interrupter for a type wheel

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919005A (en) * 1959-12-29 Printing apparatus
US2438071A (en) * 1944-12-23 1948-03-16 Ibm Perforated card controlled alphabet and numeral printer
US2843243A (en) * 1955-08-09 1958-07-15 Sperry Rand Corp Printing device
US3227259A (en) * 1963-08-22 1966-01-04 Mite Corp Electrically operated printer with type body axially movable and rotatable
US3364852A (en) * 1965-11-12 1968-01-23 Friden Inc High-speed print drum with traveling print hammer
US3429414A (en) * 1967-04-24 1969-02-25 Scm Corp Printer with print hammer mounted on movable carriage
US3526309A (en) * 1967-06-30 1970-09-01 Singer Co Ink transfer roller with ink supply interrupter for a type wheel
US3424291A (en) * 1967-08-28 1969-01-28 Friden Inc Carriage drive for high-speed printer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027764A (en) * 1975-06-24 1977-06-07 Casio Computer Co., Ltd. Apparatus for confirming the correct impression of printing characters
US4310256A (en) * 1976-07-15 1982-01-12 Alps Electric Co., Ltd. Printers
US4352576A (en) * 1979-07-09 1982-10-05 Alps Patent Department Serial printer having a single drive motor

Also Published As

Publication number Publication date
DE2236003A1 (de) 1973-02-15
JPS4821536U (forum.php) 1973-03-12
DE2236003B2 (de) 1977-02-17
JPS5113927Y2 (forum.php) 1976-04-14

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