US3885661A - Printing head feeding mechanism for printers - Google Patents

Printing head feeding mechanism for printers Download PDF

Info

Publication number
US3885661A
US3885661A US406339A US40633973A US3885661A US 3885661 A US3885661 A US 3885661A US 406339 A US406339 A US 406339A US 40633973 A US40633973 A US 40633973A US 3885661 A US3885661 A US 3885661A
Authority
US
United States
Prior art keywords
printing head
pulleys
pair
rope
operating gear
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
US406339A
Other languages
English (en)
Inventor
Katsuhiko Okabe
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.)
Koparu KK
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
Priority claimed from JP47120297A external-priority patent/JPS4863055A/ja
Application filed by Nidec Copal Corp filed Critical Nidec Copal Corp
Application granted granted Critical
Publication of US3885661A publication Critical patent/US3885661A/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
    • 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

  • ABSTRACT A printing head feeding mechanism for printers comprising a pair of pulleys respectively arranged at positions near both limits of the moving range of a printing head, an intermediate pulley rotatably supported at an end of crank lever and movable between said pair of pulleys, and a rope connected to said printing head and applied between said pair of pulleys after which both sides of said rope are respectively applied in S- shape between said intermediate pulley and each of said pair of pulleys and both ends of said rope are held in fixed condition, in order to enable said printing head reciprocate in a comparatively long linear distance when said crank lever is reciprocated in a range of comparatively small angle.
  • the present invention relates to a printer for printing with reciprocating motion of a printing head and, more particularly, to a printing head feeding mechanism in said type of printer.
  • the coventional printing head feeding mechanism used for printers of the said type comprises a cam rotated by a motor, a crank lever which finishes one reciprocating motion by one rotation of said cam and a printing head directly or indirectly mounted on one arm of said crank lever.
  • the crank lever has to be swung by the amount corresponding to the travelling stroke of the printing head. Therefore, the cam and lever have to be large and, consequently, the printer as a whole becomes large.
  • the primary object of the present invention to provide a printing head feeding mechanism arranged so that the printing head can be moved about twice the movement of the crank lever in order to eliminate the disadvantage of said conventional feeding mechanism.
  • This object can be attained, according to the present invention, by arranging the feeding mechanism by a pair of pulleys respectively arranged at positions near both extreme limits of the moving range of the printing head, an intermediate pulley rotatably supported at one end of the crank lever so that said pulley can be moved between said pair of pulleys and a rope connected to the printing head at one portion, applied between said pair of pulleys and then applied between said intermediate pulley and each one of said pair of pulleys respectively in S-shape and, then, both ends of said rope being held in fixed condition.
  • FIG. 1 shows a perspective view of the important part of the printing head feeding mechanism according to the present invention.
  • FIG. 2 shows an explanatory diagram illustrating the relationship of the mount of movement of the printing head to the movement of the intermediate pulley.
  • reference numeral 1 designates a motor
  • numeral 2 designates a driving gear rotated by the motor
  • numeral 3 designates an intermediate gear meshing with the driving gear 3.
  • Numeral 4 designates a toothed wheel having square teeth 4a, on its circumference, for generating position signals for controlling the horizontal feed of the platen which is not illustrated here.
  • the toothed wheel 4 rotates integrally with the intermediate gear 3.
  • Numeral 5 designates an intermediate pinion which rotates integrally with the intermediate gear 3.
  • Numeral 6 designates a position signal detecting coil arranged opposite to face a square tooth 4a of the toothed wheel 4.
  • Numeral 7 designates an operating gear which meshes with the intermediate pinion 5.
  • Numeral 8 designates a cam member which forms a groove cam 8a and is provided on the operating gear 7 at a position eccentric to the axis of rotation of the operating gear 7.
  • Numeral 9 designates a crank lever pivotably mounted on a shaft 10 to which a pin 9a for fitting in the groove cam 8a is fixed to one arm and a supporting shaft 9b is fixed to the other arm.
  • Numeral 11 designates an intermediate pulley rotatably mounted on the supporting shaft 9b.
  • Numeral 12 designates a pair of pulleys rotatably mounted respectively on shafts 12a arranged near both ends of the moving range of the printing head.
  • Numeral 13 designates a rope which is first applied between pulleys l2 and 12 so that the rope is stretched between those pulleys. Then, both sides of the rope 13 are applied in S-shape between the intermediate pulley 11 and respective ones of pulleys 12 and 12. After that, both ends of the rope 13 are held in fixed condition.
  • Numeral 14 designates a pair of levers for supporting a rail 16 which are pivotably mounted on shafts 15 and 15, respectively.
  • Numeral l7 designates a head holder which is connected to the rope 13 by a connecting piece 17a and, at the same time, is mounted on the rail 16 by a pair of protuberances 17b and 17b so that the head holder 17 can move along the rail 16.
  • Numeral 18 designates a printing head secured to the head holder 17. The printing head 18 faces a platen which is not shown here.
  • This feeding mechanism is arranged to suit a heatsensing type electronic printer.
  • the motor 1 rotates only when printing and stops when the operating gear 7 finishes one rotation.
  • the printing head 18 finishes its one reciprocating motion between pulleys l2 and 12, thus printing of one line is carried out.
  • this printer is arranged so that a stop signal for the motor 1 is generated when the operating gear 7 finishes one rotation.
  • the crank lever 9 also finishes its one reciprocating motion by means of the cam member 8 and the pulley ll rotatably mounted on the shaft 9b of the crank lever 9 also finishes, by rotating, its one reciprocating motion almost in parallel with the line connecting pulleys l2 and 12.
  • the head holder 17 connected to the rope l3 reciprocates along the rail 16 and the printing head 18 also reciprocates along the platen.
  • the relation of movement of the pulley l1 rotatably mounted on the supporting shaft 9b of the crank lever 9 and movement of the rope 13 to which the head holder 17 is connected is as shown in FIG. 2. From this figure, it will be understood that the head holder 17, i.e., the printing head 18 moves twice (2A) the amount of movement (A) of the pulley 11 provided that the pulley 11 moves accurately in parallel with the I rope 13 applied between pulleys 12 and 12.
  • the intermediate pulley 11 moves in a circular are around the shaft 10. Therefore, the amount of movement of the printing head 18 is not accurately twice the amount of movement of the intermediate pulley 11 and the amount of movement of the printing head 18 is not in direct proportion to the amount of movement of the intermediate pulley 1 1. But, these can be compensated by making the distance between the shaft and supporting shaft 9b as long as possible and by selecting the shape of the groove cam 8a of the cam member 8 in a suitable form.
  • FIG. 1 shows an example of said mechanism. That is, on the bottom side of the operating gear 7, a cylindrical cam member 7a is formed so that a half circle of which has a different height from the other half. On the other hand, a roller 20a is rotatably mounted on a shaft 20 which is fixed to a lever 19, said lever being connected to the supporting lever 14 by a pinand-slot connection and being rotatably supported by a shaft 19a so that the lever 19 intersects with the supporting lever 14.
  • This roller 20a is arranged to contact the cam surface of the cam member 7a. That is, during the 180 turn for the first half of the rotation of the operating gear 7, the roller 20a contacts the lower portion of the cam surface of the cam member 7a.
  • the supporting lever 14 is turned in the direction shown by the arrowhead around the shaft 15 by means of a spring 22.
  • the printing head 18 is pushed to the platen when the supporting lever 14 is turned in the direction shown by the arrowhead.
  • the position signal in horizontal direction along the platen is generated in the detecting coil 6 according to the relative position of the aforesaid toothed wheel 4 with square teeth 4a and detecting coil 6.
  • the position signal in vertical direction is given by another element which is not illustrated here. Numerals and letters are formed by combination of signals for both directions.
  • the feeding mechanism of the present invention is described referring to an embodiment suitable for an electronic printer of heat-sensingtype. It is evident, however, that the feeding mechanism according to the present invention can be also applied to printers of electric discharge type, ink-jet type and mechanical type. i
  • a printing head holder feeding mechanism for printers comprising: an operating gear, a first cam member formed on said operating gear, a crank lever engaged with said first cam member and arranged to complete one to-and-fro motion by means of one rotation of said operating gear, an intermediate pulley rotatably mounted on one end of said crank lever, a pair of pulleys positioned at both sides of said intermediate having a respective end of said extending portions held in fixed condition, one of said extending portions being shaped in S-shape and the other being shaped in reverse S-shape, a printing head connected to said rope and movable between said pair of pulleys, and a rail slidably supporting said printing head for linear movement of said printing head.
  • a printing head feeding mechanism for printers comprising: an operating gear, a first cam member formed on said operating gear, a crank lever engaged with said first cam member and arranged to complete one to-and-fro motion by means of one rotation of said operating gear, an intermediate pulley rotatably mounted on one end of said crank lever, a pair of pul leys positioned at both sides of said intermediate pulley leaving a space between each other, a rope applied between said pair of pulleys and also applied in S-shape between said intermediate pulley and each of said pair of pulleys, both ends of said rope being held in fixed condition, a printing head connected to said rope and movable between said pair of pulleys, and a rail slidably supporting said printing head for linear movement of said printing head, a rotatable supporting lever fixed to said rail, a shaft engaged to said supporting lever, a roller rotatably mounted on said shaft, and a second cam member formed on said operating gear and having two different kinds of cam surfaces engageable with said roller,

Landscapes

  • Common Mechanisms (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US406339A 1972-11-30 1973-10-15 Printing head feeding mechanism for printers Expired - Lifetime US3885661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47120297A JPS4863055A (de) 1971-11-30 1972-11-30

Publications (1)

Publication Number Publication Date
US3885661A true US3885661A (en) 1975-05-27

Family

ID=14782735

Family Applications (1)

Application Number Title Priority Date Filing Date
US406339A Expired - Lifetime US3885661A (en) 1972-11-30 1973-10-15 Printing head feeding mechanism for printers

Country Status (2)

Country Link
US (1) US3885661A (de)
DE (1) DE2352133B2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175876A (en) * 1976-11-15 1979-11-27 Shinshu Seiki Kabushiki Kaisha Drive mechanism for printer
US4250808A (en) * 1978-02-27 1981-02-17 Matsushita Electric Industrial Co., Ltd. Printer
US4259026A (en) * 1978-01-25 1981-03-31 Kabushiki Kaisha Suwa Seikosha Dot printer having concentric driving cams
FR2474202A1 (fr) * 1980-01-18 1981-07-24 Olivetti & Co Spa Calculatrice electronique de poche
US4459054A (en) * 1982-01-15 1984-07-10 International Business Machines Corporation Shared character selection, escapement and line advance system for serial printer
FR2589397A1 (fr) * 1985-11-01 1987-05-07 Ricoh Kk Dispositif d'impression
US4678354A (en) * 1985-12-02 1987-07-07 Xerox Corporation Typewriter cable tensioning mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0016995B1 (de) * 1979-03-30 1984-08-22 Ascom Autelca Ag Antriebs- und Führungsvorrichtung für einen Nadelkopf eines Nadeldruckers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692509A (en) * 1950-04-28 1954-10-26 A C Wickman Ltd Tool-slide actuating mechanism for lathes or other machines
US2799874A (en) * 1955-01-11 1957-07-23 United Shoe Machinery Corp Machines for use in the manufacture of shoes
US3110194A (en) * 1962-02-20 1963-11-12 Eastman Kodak Co Cam and follower
US3261445A (en) * 1965-07-01 1966-07-19 Ibm Tape controlled typewriter
US3352398A (en) * 1966-06-29 1967-11-14 Ibm Character selection mechanism without return to home position
US3581360A (en) * 1969-03-24 1971-06-01 Abe D Penn Roller for spring belt conveyors
US3677384A (en) * 1970-12-16 1972-07-18 Triumph Werke Nuernberg Ag Mechanism for positioning single element type carriers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692509A (en) * 1950-04-28 1954-10-26 A C Wickman Ltd Tool-slide actuating mechanism for lathes or other machines
US2799874A (en) * 1955-01-11 1957-07-23 United Shoe Machinery Corp Machines for use in the manufacture of shoes
US3110194A (en) * 1962-02-20 1963-11-12 Eastman Kodak Co Cam and follower
US3261445A (en) * 1965-07-01 1966-07-19 Ibm Tape controlled typewriter
US3352398A (en) * 1966-06-29 1967-11-14 Ibm Character selection mechanism without return to home position
US3581360A (en) * 1969-03-24 1971-06-01 Abe D Penn Roller for spring belt conveyors
US3677384A (en) * 1970-12-16 1972-07-18 Triumph Werke Nuernberg Ag Mechanism for positioning single element type carriers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175876A (en) * 1976-11-15 1979-11-27 Shinshu Seiki Kabushiki Kaisha Drive mechanism for printer
US4259026A (en) * 1978-01-25 1981-03-31 Kabushiki Kaisha Suwa Seikosha Dot printer having concentric driving cams
US4250808A (en) * 1978-02-27 1981-02-17 Matsushita Electric Industrial Co., Ltd. Printer
FR2474202A1 (fr) * 1980-01-18 1981-07-24 Olivetti & Co Spa Calculatrice electronique de poche
US4372694A (en) * 1980-01-18 1983-02-08 Ing. C. Olivetti & Co., S.P.A. Electronic pocket calculator
US4459054A (en) * 1982-01-15 1984-07-10 International Business Machines Corporation Shared character selection, escapement and line advance system for serial printer
FR2589397A1 (fr) * 1985-11-01 1987-05-07 Ricoh Kk Dispositif d'impression
US4678354A (en) * 1985-12-02 1987-07-07 Xerox Corporation Typewriter cable tensioning mechanism

Also Published As

Publication number Publication date
DE2352133B2 (de) 1976-01-22
DE2352133A1 (de) 1974-05-22

Similar Documents

Publication Publication Date Title
US3885661A (en) Printing head feeding mechanism for printers
GB1451557A (en) Machine tool including a quill drive mechanism
KR950007235B1 (ko) 공작기계의 팰릿교환장치
JPH01196374A (ja) 記録装置
US4372698A (en) Driving device for a print head of a printer
US4591882A (en) Printer electromagnetic clutch drive
US4657417A (en) Thermal printer
EP0187428A1 (de) Mechanismus zum Erzeugen einer hin- und hergehenden Drehbewegung
US2778232A (en) Precision carriage displacement device
US3263601A (en) Address-stencil printing machine
US4401025A (en) Device for pivoting a printing unit
US3688713A (en) Reciprocating motion control device
CN217226987U (zh) 一种丝网印刷机上料定位装置
US3681561A (en) Turntable type work feeding method of feeding multiple-contact electric components for contact welding thereof and apparatus for performing such method
US1459757A (en) Semiautomatic table-moving attachment for presses
US889102A (en) Type-writing machine.
US1202636A (en) Key-cutting attachment for lathes.
JPH0137879Y2 (de)
KR860007770A (ko) 정류자용 챔퍼링(chamfering)장치
US3383932A (en) Adjustable drive for roll feed mechanism
US902326A (en) Mechanism for operating adjustable work-performing members.
JPH01136776A (ja) 自動紙厚調整機構
US711534A (en) Gearing for washing-machines.
GB191319308A (en) Improvements in Slicing Machines.
US660030A (en) Engraving-machine.