EP0022340A1 - Druckhammerkonstruktion - Google Patents

Druckhammerkonstruktion Download PDF

Info

Publication number
EP0022340A1
EP0022340A1 EP80302174A EP80302174A EP0022340A1 EP 0022340 A1 EP0022340 A1 EP 0022340A1 EP 80302174 A EP80302174 A EP 80302174A EP 80302174 A EP80302174 A EP 80302174A EP 0022340 A1 EP0022340 A1 EP 0022340A1
Authority
EP
European Patent Office
Prior art keywords
arm
base portion
construction according
armature
solenoid
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.)
Withdrawn
Application number
EP80302174A
Other languages
English (en)
French (fr)
Inventor
Paulus Edwardus Plasschaert
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.)
NCR Canada Ltd
Original Assignee
NCR Canada Ltd
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 NCR Canada Ltd filed Critical NCR Canada Ltd
Publication of EP0022340A1 publication Critical patent/EP0022340A1/de
Withdrawn legal-status Critical Current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
    • B41J9/133—Construction of hammer body or tip
    • 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

Definitions

  • This invention relates to a print hammer construction which may, for example, be used in printing bar codes or alpha-numeric characters.
  • the invention is concerned in particular with a high-speed print hammer construction of the kind including a print hammer arm which is pivotally mounted on a base portion and which carries an armature adjacent one end thereof, which armature cooperates with a solenoid to move the other end of the arm into printing relationship with a record medium when the solenoid is energized.
  • a print hammer construction including a base portion; a print hammer arm pivotally mounted on said base portion and carrying an armature adjacent one end thereof; and a solenoid mounted on said base portion and cooperating with said armature to move the other end of said arm into printing relationship with a record medium when said solenoid is energized, characterized in that said arm is joined to said base portion by means of a hing; portion allowing said arm to pivot with respect to said base portion, and in that said base portion, arm and hinge portion are integrally formed to provide a one-piece unit of the same material.
  • the invention is based on the discovery by the Applicants that in a print hammer construction of the kind specified a one-piece form of construction of the base portion, the arm and a hinge portion provides a frictionless pivot which performs satisfactorily at high speed over a long operating life without failure. Also, a print hammer construction in accordance with the invention has the additional advantages that it is low in cost and easy to manufacture, has a reduced assembly time, and operates with a low level of noise.
  • Fig. 1 is a general perspective view of a print hammer construction according to the invention and being designated generally as 10.
  • the construction 10 includes a base portion 12, a print hammer arm 14, and a hinge portion 16 which are integrally formed by conventional moulding techniques into a one-piece unit or construction from a material such as, for example, polypropylene plastic.
  • the arm 14 (Fig. 1) has a first end 18 to which a printing hammer or element 20 (shown in dashed outline) is secured by fasteners 22.
  • the printing element 20 may be shaped as a rectangle to print a bar when any of the conventional bar codes is printed.
  • the printing element 20 coacts with a stationary printing anvil or bar 23 of the desired shape and dimensions to print a bar on a record medium 25 when a ribbon 27 is positioned between the record medium 25 and the printing bar 23, and the printing element 20 impacts against the printing bar 23.
  • the printing bar 23 may be replaced with any conventional character carrier such as a rotating character drum (not shown) having the alpha-numeric characters thereon.
  • the printing bar 23 may also be of the "porous ink" variety eliminating the need for ribbon 27 when especially low- level impact printing is desired.
  • the arm 14 has a reduced area forming a rib 24 to provide rigidity while reducing the mass of the arm to thereby provide a fast hammer cycle time.
  • the rib is located between the first end 18 and the hinge portion 16.
  • the arm 14 has a second end 26 which has an opening 28 (Fig. 2) therein to receive the armature 30 (Fig. 1).
  • the armature 30 is made of. 2% silicon iron and is press fitted and cemented in the opening 28 to be retained therein.
  • the armature 30 may be placed- in the mould in which the construction 10 is moulded and the arm 14 may be moulded therearound during the moulding process to fix the armature 30 therein.
  • the armature 30 has a long axis which is perpendicular to the planes formed by the main faces of the one-piece unit.
  • the arm 14 also has a projection 32 (Fig.
  • the stop 42 is made of a rigid material such as metal to minimize the rebounding of the arm 14 when it is returned against the stop 42 by the spring 40.
  • the stop 42 is secured to a frame member (not shown) in which the construction 10 is used; the base portion 12 has mounting holes 44 therein to enable the construction 10 to be secured to the mentioned frame member when in the assembled state shown in Fig. 1.
  • the base portion 12 (Fig. 2) has a mounting hole 46 therein to receive a fastener 48 which secures a "U"-shaped solenoid core 50 to one side of the base portion 12 as shown in Figs. 1 and 2.
  • the core 50 has first and second legs 52 ans 54 with energizing coils 56 and 58 being wound on the legs 52 and 54, respectively.
  • the armature 30 is attracted to the pole faces (like 62) of the legs 52 and 54 causing the arm 14 to pivot on the hinge portion 16, thereby bringing the printing element 20 into printing relationship with a record medium 25 as previously described.
  • the record medium 25 is moved in the direction of arrow 66 (Fig. 1) in printing relationship with. the printing element 20 and the printing bar 23 although other relative movements therebetween can be effected for a particular application.
  • Figs. 3, 4, and 5 show various views of the construction 10.
  • the base portion 12, arm 14 and hinge portion form a flat one-piece unit whose main faces substantially lie in parallel planes and which is relatively easy to mould.
  • the hinge portion 16 extends over the thickness of the base portion 12 and has the profile shown in Fig. 6.
  • the hinge portion 16 is shown in exaggerated size in Fig. 6, and when the construction 10 is just moulded, the hinge portion 16 as measured by the dimension line 64 has a width of about 25 to 508 mm. While the construction 10 is still hot after moulding, the hinge portion 16 is flexed by pivoting the arm 14 to its limits in both directions.
  • the hinge portion 16 is located at a point approximately one third of the length of the arm 14 from the second end thereof.
  • the height of the printing bar 23 as viewed in Fig. 1 is 8 mm. and the width thereof is .25 mm. wide.
  • Successive bars printed by the construction 10 are spaced . 88 mm. apart and it can print the bars at a speed of movement of the record medium of approximately 220 mm. per second.
  • the actuation time of the print hammer construction 10 is about 4 milliseconds per impact.
  • the printing element 20 has a contact area or face 68 corresponding in shape to the shape of the printing bar 23; however, the face 68 is slightly larger than the dimensions of the printing bar 23.

Landscapes

  • Impact Printers (AREA)
EP80302174A 1979-07-02 1980-06-27 Druckhammerkonstruktion Withdrawn EP0022340A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5386979A 1979-07-02 1979-07-02
US53869 1979-07-02

Publications (1)

Publication Number Publication Date
EP0022340A1 true EP0022340A1 (de) 1981-01-14

Family

ID=21987098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80302174A Withdrawn EP0022340A1 (de) 1979-07-02 1980-06-27 Druckhammerkonstruktion

Country Status (2)

Country Link
EP (1) EP0022340A1 (de)
JP (1) JPS5610473A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624588A (en) * 1983-11-08 1986-11-25 Maverick Microsystems, Inc. Full field MICR encoder
US4668112A (en) * 1985-07-02 1987-05-26 Xerox Corporation Quiet impact printer
US4721400A (en) * 1986-01-16 1988-01-26 Fuji System Machines Co., Ltd. Hammer unit for printers
GB2221195A (en) * 1988-07-25 1990-01-31 Citizen Watch Co Ltd Print head for dot matrix printers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474158B1 (de) * 1990-09-07 1995-04-19 Mitsubishi Chemical Corporation Silica-Glas Pulver und Verfahren seiner Herstellung und daraus hergestellter Silica-Glasgegenstand

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513773A (en) * 1965-09-30 1970-05-26 Olivetti General Electric Spa Printing module for high speed printers
FR1594281A (de) * 1967-12-23 1970-06-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513773A (en) * 1965-09-30 1970-05-26 Olivetti General Electric Spa Printing module for high speed printers
FR1594281A (de) * 1967-12-23 1970-06-01

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624588A (en) * 1983-11-08 1986-11-25 Maverick Microsystems, Inc. Full field MICR encoder
US4668112A (en) * 1985-07-02 1987-05-26 Xerox Corporation Quiet impact printer
US4721400A (en) * 1986-01-16 1988-01-26 Fuji System Machines Co., Ltd. Hammer unit for printers
GB2221195A (en) * 1988-07-25 1990-01-31 Citizen Watch Co Ltd Print head for dot matrix printers
US4986179A (en) * 1988-07-25 1991-01-22 Citizen Watch Co., Ltd. Print head for dot matrix printers
GB2221195B (en) * 1988-07-25 1992-08-05 Citizen Watch Co Ltd Print head for dot matrix printers

Also Published As

Publication number Publication date
JPS5610473A (en) 1981-02-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811221

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PLASSCHAERT, PAULUS EDWARDUS