WO1985000320A1 - Imprimante a impact a roue d'impression serielle - Google Patents

Imprimante a impact a roue d'impression serielle Download PDF

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Publication number
WO1985000320A1
WO1985000320A1 PCT/US1984/001041 US8401041W WO8500320A1 WO 1985000320 A1 WO1985000320 A1 WO 1985000320A1 US 8401041 W US8401041 W US 8401041W WO 8500320 A1 WO8500320 A1 WO 8500320A1
Authority
WO
WIPO (PCT)
Prior art keywords
print
hammer
printer
motor
accordance
Prior art date
Application number
PCT/US1984/001041
Other languages
English (en)
Inventor
Bruce C. Barton
John Kadlecik
Original Assignee
Burroughs Corporation
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 Burroughs Corporation filed Critical Burroughs Corporation
Priority to JP84502739A priority Critical patent/JPS60501749A/ja
Publication of WO1985000320A1 publication Critical patent/WO1985000320A1/fr

Links

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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • B41J1/44—Carriers stationary for impression
    • 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
    • B41J9/06—Hammers; Arrangements thereof of single hammers, e.g. travelling along printing line of stationary hammers, e.g. engaging a single type-carrier

Definitions

  • This invention relates in general to a serial printer which includes a rotatable print wheel. More particularly, this invention relates to a serial impact printer which serrates a check or other document with a protected amount field. Still more particularly, this invention relates to a serial print wheel engine for use as the protect amount print station of a check writer. 2 - Description of the Prior Art
  • Serial printers which include a print element in the shape of a disk or cup are known in the art. In general, such printers can be divided into two types. In the first type, the print element is constantly rotating and printing takes place on the fly. In the second type, the print element stops and starts and printing takes place while the print element is stationary.
  • serial printer with a constantly rotating print element can be found in U. S. Pat. No. 3,461,235 (Wilcox) .
  • Examples of a serial printer with a print element that stops before printing occurs can be found in U. S. Pat. Nos. 3,707,214 (Panzo) and 4,037,707 (Ku) .
  • Serial print elements where the print element is in the shape of a cup are also known.
  • U. S. Pat. No. 3,640,369 shows a print element with a cup-shaped shell having integrally formed characters on the _5 outer surface of the shell.
  • ⁇ . S. Pat. No. 4,037,707 the sides of a cup shaped print element are formed by a plurality of fingers, each of which has a number of characters.
  • a hammer is located in the center of the cup. Printing is accomplished by rotating the cup so that the desired finger is located between a hammer and the paper. The hammer is then fired to print the desired character.
  • a print wheel including a wheel-like circular member, the hub of which is rotated by a motor to position the desired print character in a print position.
  • each print character is mounted on the first end of a finger-like element, the second end of each finger-like element mounted in the top of the circular member's perimeter.
  • the impact mechanism Positioned within the circular member, behind the print position, is an anvil against which the back of the print character is pressured by an impact mechanism during a print operation.
  • the impact mechanism is positioned outboard of the circular member. It includes a d.c. motor which turns a threaded shaft either clockwise or counterclockwise. The threaded shaft is coupled to a threaded hole bored in the end of a hammer. The head of the hammer is positioned in front of the print position. The hammer passes through a guide which prevents the hammer from rotating as the d.c. motor rotates. The document and an inked ribbon are fed in between the hammer's head and the print wheel and are repositioned after each character is printed. When the d.c.
  • the threaded shaft moves the hammer toward the anvil so that the hammer 1 s head pushes the selected character against the anvil at a precisely controlled force.
  • the selected character image is thus printed and serrated on the document.
  • the d.c. motor is then rotated clockwise to restore the impact mechanism to its original position.
  • the print wheel is rotated to position the next selected character to be printed into position in front of the anvil.
  • FIG. 1 shows a top view of the preferred embodiment of the present invention.
  • FIG. 2 is a side view of the print wheel and anvil shown in FIG. 1.
  • FIG. 1 An overall view of the major elements of the printer is shown in FIG. 1.
  • the printer includes a print wheel 10, an anvil 12, and an impact mechanism 14.
  • a document 16 or other recording medium is positioned between the print wheel 10 and impact mechanism 14.
  • Print wheel 10 is rotated by a motor 18.
  • a frame 20 supports anvil 12.
  • An inked ribbon 22 is positioned between print wheel 10 and document 16.
  • the document 16 and ribbon 22 are incrementally advanced in the direction shown between each print operation.
  • the support and drive mechanisms for the ribbon 22 and document 16 are not shown. Both can be constructed from conventional drive mechanisms which are well known in the prior art.
  • Motor 18 selectively rotates the print wheel 10 whereby a selected print finger 24 can be positioned between anvil 12 and ribbon 22.
  • ONfPI print wheel 10 stops before the impact mechanism 14 presses the ribbon 22 and document 16 against the finger 24, which is in turn pressed against the anvil 12 to print a character. In the preferred embodiment, neither the impact mechanism 14 or print wheel 10 moves across the document 16. Instead, means (not shown) reposition the document 16 prior to printing each character.
  • print wheel 10 has sixteen fingers designated 24-1 to 24-16. For clarity of illustration, not all of the fingers 24-1 to 24-16 are shown. Each of the fingers 24-1 to 24-16 has either one of the character digits 0-9 or a special character(s) , the set of sixteen fingers 24-1 to 24-16 thus including all characters necessary to print a protected field on document 16.
  • the characters on the fingers 24-1 to 24-16 are formed from raised line patterns. As a result, when a character is printed on the document 16, the character's line-like pattern serrates the document 16, thus providing one character of the protected amount field.
  • Print wheel 10 is mounted on shaft 26 which is connected to motor 18.
  • Print wheel 10 includes a wheel-like circular member 28, the hub 30 of which is connected to shaft 26 by setscrew 32.
  • Each finger 24-1 to 24-16 is mounted in a corresponding slot in the perimeter of the circular member 28 by a semi-flexible steel bar 34.
  • a print character element 36 is mounted on the unconnected end of each steel bar 34.
  • a steel print character 38 is attached to the outer surface of each print character element 36,
  • a conventional stepper motor is used for motor 18.
  • the circuitry for driving the stepper motor to position the desired finger 24 in front of anvil 12 is not shown herein since such circuitry could be conventional commercially available circuitry.
  • the impact mechanism 14 is driven by a conventional d.c. motor 40, such as that manufactured by Indiana General.
  • a conventional rotary-type solenoid such as that manufactured by Ledex can be used instead of d.c. motor 40.
  • the d.c. motor 40 is characterized as rotating in either direction in response to supplied control signals. The circuitry for controlling the d.c. motor will be described below.
  • the shaft 42 of d.c. motor 40 is connected to threaded shaft 44 which thereby rotates the same number of degrees and in the same direction as the d.c. motor 40.
  • the threaded end of shaft 44 is engaged with corresponding female threads machined in the end of hammer 50.
  • the hammer 50 may be molded with the threaded hole included, thus eliminating the need to machine the threaded hole.
  • the hammer 50 is of a semicylindrical shape and is fabricated from steel or another suitable material.
  • the hammer 50 is slidably mounted in an aperture in guide 52.
  • the outer cylindrical surface of hammer 50 has two flat sections running along its longitudinal axis. Corresponding flat sections are also provided in the aperture in guide 52. The purpose of the flat sections is to insure that the hammer 50 does not rotate as it is moved toward or away from the print
  • the cylindrical shape of the hammer 50 may instead be square or hexagonal with the aperture in guide 52 being similarly shaped, the object again being to prevent the hammer 50 from rotating.
  • the guide 52 is made of a material such as plastic which provides a low friction surface for the outer surface of the hammer 50 to slide against.
  • the motor 18 is rotated to position the print finger 24 corresponding to the character selected to be printed in front of anvil 12. Either before, after or during the repositioning of print wheel 10, the ribbon 22 and document 16 are advanced to position the area of the document 16 to be printed on in front of the selected print finger 24.
  • a first polarity d. c. current is applied to d. c. motor 40 causing it to rotate in a counterclockwise direction, thereby causing hammer 50 to be moved toward anvil 12.
  • the level of the first polarity current is chosen to result in a specific amount of torque being generated by the d. c. motor 40.
  • the time duration of the first polarity current is chosen to assure that the hammer 50 will move a sufficient distance so that it bottoms out pressing the selected print character element 36 against anvil 12 with the motor 40 in a stalled condition, thereby causing the selected print character 38 to print and serrate the document 16 with the selected character.
  • an opposite polarity current is applied to d. c. motor 40 causing it to rotate in a clockwise direction, thereby causing hammer 50 to be restored to its original position.
  • the time duration that the opposite polarity current is applied is the same as that for the first polarity current, so that on the return stroke the hammer 50 bottoms out against return stop 56.
  • the ribbon 22, document 16, and (if necessary) the print wheel 10 are repositioned and the same operation is repeated to print the next selected character on the document 16.
  • the above-described sequence is performed quite rapidly so that printing speed typically in the range of 3-10 cps may be achieved.
  • the print force is determined by the torque that motor 40 applies to threaded shaft 44.
  • the torque of d. c. motor 40 is proportional to its current and that the motor 40 torque can be controlled in two ways, namely by directly controlling the current through the motor 40 with a constant current controller 54 or indirectly by controlling the voltage applied to the motor 40.
  • the torque necessary to achieve the desired print force is precisely controlled by controlling the current through d. c. motor 40.
  • the design of the current control circuitry 54 necessary to achieve a motor torque which produces the desired print force is not shown herein, but will be obvious to those of ordinary skill in the art.
  • a character to be printed having a large surface area i.e., an "8”
  • a character having less surface area i.e., a "1”
  • the optimum print force may be obtained for each character printed by varying the torque generated by motor 40.
  • a standard microprocessor receives inputs from a keyboard (not shown) used by the operator to select the character to be printed. In response to the selection of a character, the microprocessor determines whether the character selected has a relatively large, medium or small amount of surface area. Based on this determination, the microprocessor provides logic signals to the current controller 54 indicating which of three print force levels is to be utilized to print the selected character. In response to these logic signals, the current controller 54 changes the current through the motor 40 to one of three levels, the largest current level corresponding to selected characters having the largest surface area.
  • the first polarity current is applied to the d. c. motor 40 for approximately 30 milliseconds and immediately thereafter the opposite polarity current is applied for 30 milliseconds.
  • the time duration of each of the first or opposite polarity currents causes d. ⁇ . motor 40 to rotate counterclockwise or clockwise by approximately 180 degrees, respectively.
  • the motor 40 rotates counterclockwise until it stalls with the selected print character element 36 forced against the anvil 12.
  • the motor 40 rotates clockwise until it stalls with the hammer 50 against the return stop 56.
  • stalling occurs when the motor 40 has rotated counterclockwise or clockwise by a few degrees more or less than the nominal 180 degrees.
  • the number of degrees the motor 40 rotates is dependent on the thread helix angle of shaft 44 and the distance the hammer 50 must travel before it bottoms out with the selected print character element 36 against the anvil 12.
  • a nominal 180 degree rotation of motor 40 was chosen since the motor 40 has two sets of brushes. Thus, by rotating the motor 40 180 degrees each set of brushes gets equal wear.
  • the preferred embodiment of the impact mechanism is only capable of varying the level of print force in response to the character selected to be printed, those skilled in the art will appreciate that modifications may be made to additionally vary the print force depending on the number of plys in the document 16.
  • a switch may be added to enable the operator to select the number of plies in the document 16 to be printed.
  • the voltage level or current to the d. c. motor 40 can further be varied so that the torque generated by motor 40 is increased when the switch is set to a position corresponding to an increased number of document 16 plies
  • the previously discussed microprocessor may additionally be responsive to a detector which detects the number of plies in the document 16. Based on the character to be printed and the number of plies in the document 16, the microprocessor would signal the current controller 54 to change the motor 40 current to generate a torque which will produce an optimum force to print and serrate the document 16 for each selected character.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Abstract

Imprimante à impact sérielle améliorée produisant des impressions en relief sur un document. L'imprimante comprend une roue d'impression (10) qui tourne pour positionner un caractère sélectionné en face d'une enclume (12). La roue d'impression (10) comprend un organe circulaire en forme de roue (28) possédant des caractères d'impression (38) à l'extrémité de doigts (24) s'étendant du sommet du périmètre de la roue d'impression. Un mécanisme à impact (14) comprime le caractère d'impression sélectionné contre l'enclume (12), le document (16) étant positionné entre le caractère d'impression sélectionné (38) et le mécanisme à impact (14). Ce dernier comprend un moteur à courant continu à commande de couple (40) qui fait tourner un arbre fileté (44) s'engageant dans un trou fileté à l'extrémité d'un marteau (50). Le mouvement dans le sens contraire à celui des aiguilles d'une montre du moteur à courant continu fait avancer la tête du marteau pour comprimer le dos du caractère d'impression contre l'enclume (12), imprimant ainsi en relief le caractère sélectionné sur le document. Successivement, le mouvement dans le sens des aiguilles d'une montre du moteur à courant continu (40) remet le mécanisme à impact (14) dans sa position originale.
PCT/US1984/001041 1983-07-05 1984-07-03 Imprimante a impact a roue d'impression serielle WO1985000320A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP84502739A JPS60501749A (ja) 1983-07-05 1984-07-03 シリアルプリントホイ−ルを用いたインパクトプリンタ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51054183A 1983-07-05 1983-07-05
US510,541 1983-07-05

Publications (1)

Publication Number Publication Date
WO1985000320A1 true WO1985000320A1 (fr) 1985-01-31

Family

ID=24031171

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1984/001041 WO1985000320A1 (fr) 1983-07-05 1984-07-03 Imprimante a impact a roue d'impression serielle

Country Status (4)

Country Link
EP (2) EP0133754A1 (fr)
JP (1) JPS60501749A (fr)
CA (1) CA1232224A (fr)
WO (1) WO1985000320A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3729309C1 (de) * 1987-09-02 1989-01-26 Triumph Adler Ag Schreib- oder aehnliche Maschine mit einem Typenrad

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719202A (en) * 1902-07-16 1903-01-27 John Dennis Press.
US888889A (en) * 1907-08-19 1908-05-26 Adjustable Seal Company Seal impressing or printing machine.
US3236352A (en) * 1962-09-17 1966-02-22 Schacht Roy Arthur Keyboard operated automatic marking machine
US3838765A (en) * 1971-12-28 1974-10-01 Honeywell Bull Soc Ind Printing device with moveable characters
US3941229A (en) * 1973-08-14 1976-03-02 Ing. C. Olivetti & C., S.P.A. Serial printing device
US4037707A (en) * 1976-03-08 1977-07-26 International Business Machines Corporation Cup shaped printer
US4091912A (en) * 1977-03-17 1978-05-30 Computer Peripherals, Inc. Record media clamping mechanism
JPS5591686A (en) * 1978-12-30 1980-07-11 Alps Electric Co Ltd Hammer mechanism of printing apparatus
EP0033226A2 (fr) * 1980-01-23 1981-08-05 Nec Corporation Mécanisme de sélection de caractères pour imprimantes en série
US4389126A (en) * 1980-06-27 1983-06-21 Nippon Electric Co., Ltd. Serial impact printer having two printing modes
US4422784A (en) * 1982-04-08 1983-12-27 Dataproducts Corporation Solenoid-type hammer assembly for impact printer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1602392A (fr) * 1968-11-19 1970-11-16
FR2031729A5 (fr) * 1969-02-02 1970-11-20 Bull General Electric
JPS4940259U (fr) * 1972-07-05 1974-04-09
JPS5122847A (en) * 1974-08-12 1976-02-23 Yoshio Uda Natsutono seizohoto sonoseizosochi
JPS52152318A (en) * 1976-06-14 1977-12-17 Ricoh Kk Printer
US4103617A (en) * 1977-01-10 1978-08-01 Ncr Canada Ltd. - Ncr Canada Ltee Hammer energy impact control using read only memory
US4212549A (en) * 1978-09-05 1980-07-15 Dataproducts Corporation Disc printer
EP0017918A1 (fr) * 1979-04-16 1980-10-29 Vydec, Inc. Mécanisme d'impression et procédé pour imprimer des caractères alpha-numériques

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719202A (en) * 1902-07-16 1903-01-27 John Dennis Press.
US888889A (en) * 1907-08-19 1908-05-26 Adjustable Seal Company Seal impressing or printing machine.
US3236352A (en) * 1962-09-17 1966-02-22 Schacht Roy Arthur Keyboard operated automatic marking machine
US3838765A (en) * 1971-12-28 1974-10-01 Honeywell Bull Soc Ind Printing device with moveable characters
US3941229A (en) * 1973-08-14 1976-03-02 Ing. C. Olivetti & C., S.P.A. Serial printing device
US4037707A (en) * 1976-03-08 1977-07-26 International Business Machines Corporation Cup shaped printer
US4091912A (en) * 1977-03-17 1978-05-30 Computer Peripherals, Inc. Record media clamping mechanism
JPS5591686A (en) * 1978-12-30 1980-07-11 Alps Electric Co Ltd Hammer mechanism of printing apparatus
EP0033226A2 (fr) * 1980-01-23 1981-08-05 Nec Corporation Mécanisme de sélection de caractères pour imprimantes en série
US4389126A (en) * 1980-06-27 1983-06-21 Nippon Electric Co., Ltd. Serial impact printer having two printing modes
US4422784A (en) * 1982-04-08 1983-12-27 Dataproducts Corporation Solenoid-type hammer assembly for impact printer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM Technical Disclosure Bulletin, Volume 19 No. 8 issued January 1977 (Armonk, New York), D.J. Stiles, "Horizontal Cup Printer", see pages 2988 and 2989 *

Also Published As

Publication number Publication date
EP0215198A1 (fr) 1987-03-25
EP0133754A1 (fr) 1985-03-06
JPS60501749A (ja) 1985-10-17
CA1232224A (fr) 1988-02-02

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