EP0214720A1 - Method and assembly for mounting fluid-jet orifice plate - Google Patents

Method and assembly for mounting fluid-jet orifice plate Download PDF

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Publication number
EP0214720A1
EP0214720A1 EP19860305005 EP86305005A EP0214720A1 EP 0214720 A1 EP0214720 A1 EP 0214720A1 EP 19860305005 EP19860305005 EP 19860305005 EP 86305005 A EP86305005 A EP 86305005A EP 0214720 A1 EP0214720 A1 EP 0214720A1
Authority
EP
European Patent Office
Prior art keywords
orifice plate
planar
clamping
mounting
manifold assembly
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Withdrawn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
EP19860305005
Other languages
German (de)
English (en)
French (fr)
Inventor
Richard Sutera
Louis A. Graham
James D. Rouch
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.)
Burlington Industries Inc
Original Assignee
Burlington Industries Inc
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 Burlington Industries Inc filed Critical Burlington Industries Inc
Publication of EP0214720A1 publication Critical patent/EP0214720A1/en
Withdrawn legal-status Critical Current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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/035—Ink jet characterised by the jet generation process generating a continuous ink jet by electric or magnetic field
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14362—Assembling elements of heads

Definitions

  • the present invention relates to the field of non-contact fluid marking devices which are commonly known as “ink-jet” or “fluid-jet” devices. More particularly, the present invention relates to the method and assembly to mount an orifice plate to a fluid-jet device and to the apparatus used in the mounting operation.
  • Ink-jet devices in and of themselves are well known through e.g. U.S. Patent Nos. 3,373,437 to Sweet et al; 3,560,988 to Krick; 3,579,721 to Kaltenbach; and 3,596,275 to Sweet.
  • prior art ink-jet devices provide a linear array of fluid-jet orifices formed in an orifice plate from which filaments of pressurized marking fluid (e.g. ink, dye, etc.) are caused to issue from a fluid supply chamber.
  • An individually controllable electrostatic charging electrode is disposed downstream of the orifice plate along the so-called "drop-formation" zone.
  • the fluid filament is caused to assume an electrical potential opposite in polarity and related in magnitude to the electrical potential of its respective charging electrode.
  • this induced electrostatic charge is then trapped on and in the droplet.
  • subsequent passage of the charged droplet through an electrostatic field will cause the droplet to be deflected towards a catching structure.
  • Uncharged droplets on the other hand proceed along the normal droplet flight path and are eventually deposited upon a recording substrate.
  • solder techniques to rigidly fix an orifice plate to an orifice plate holder.
  • solder techniques are disadvantageous in that bowing of the orifice plate occurs due to differential thermal expansion and temperature variances between the orifice plate and the orifice plate holder. This phenomenon is, at least in part, thought to be caused by the fact that the solder technique precludes intimate planar contact between the various structural components.
  • Hunt '791 relates to the means which permit the positioning and alignment of a jet of printing liquid which issues from a hole in a disc.
  • Hunt '791 provides a compressible washer retained in recess.
  • the disc bears against the compressible washer and is held in position by a plate which defines a central hole.
  • a trio of aligned holes in the plate and bottom flange of housing couple the plate to the bottom flange so as to capture the disc between the plate and the washer in the central recess.
  • Bader etal '013 disclose a leaf spring secured to a print head in overlying fashion with respect to nozzle plate.
  • Bader et al '103 require that the orifice plate be fixed to the print head by means of screws in addition to the securing functions provided by the leaf spring.
  • Lundquist et al '435 merely disclose that a holder can be threadably coupled to the forward end of a block so to provide an easily removable mounting from the nozzle (see FIGURE 2).
  • White et al '901 disclose a sandwich-type structure for mounting an orifice plate to a base. The screws are required by White et al's '901 structure to pass through each element of the sandwich-type structure including the orifice plate 16.
  • Paranjpe et al '899 relate to a formed orifice plate which defines a trough having outwardly extended flanges.
  • the trough-like orifice plate of Paranjpe et al '899 is dependently supported in the orifice plate holder.
  • the present invention provides for a method and an assembly whereby axial bowing of the orifice plate is prevented by maintaining the planar orifice plate against a planar surface defined on an orifice plate holder.
  • a pair of clamp members accomplish this function, each of which includes a clamp body defining a vertical guide surface which slidably cooperates with a vertical guide surface formed on the exterior of a manifold assembly.
  • Each damp member also includes a horizontally outwardly extended arm which defines at its terminal end a substantially planar contact surface. Suitable securing elements such an machine bolts or the like extend through the clamp body so as to bridge the clamp body and manifold assembly.
  • each securing element causes the planar contact surface at the terminal end of each clamp arm to exert a clamping force against the planar orifice plate and, in turn, to also exert a clamping force between the planar orifice plate and the recessed planar surface of the manifold assembly.
  • This advantageous planar contact exerted upon the orifice plate in a narrow region laterally of the linear array of orifices by means of the planar contact surface of each clamp arm advantageously prevents bowing of the orifice plate as forces will be evenly distributed along the axial length thereof.
  • each of the clamp members is provided with hinge means consisting of one or more hinge elements which connect the clamp members to the manifold assembly for engagement and disengagement with the planar surface of the orifice plate.
  • hinge means consisting of one or more hinge elements which connect the clamp members to the manifold assembly for engagement and disengagement with the planar surface of the orifice plate.
  • hinge means in accordance with the invention is that it facilitates the precise mounting of the clamping members, thereby further ensuring that the clamping forces applied against the orifice plate will be uniformly distributed and will thus prevent bowing about the orifice plate longitudinal axis.
  • the use of hinges also ensures that the clamping members will establish substantially perpendicular planar contact with the orifice plate, thereby preventing the plate from shifting sideways (and misaligning the lihear array of orifices) during a printing operation.
  • the present invention also contemplates mounting the orifice plate so as to maintain the orifice plate under tension between its opposing ends.
  • the invention therefore provides two methods and related apparatus for placing the orifice plate under the desired amount of tension.
  • the orifice plate is rigidly fixed (by means of clamps or the like) at one end and is then thermally expanded so as to increase the lengthwise dimension of the orifice plate by a predetermined amount (preferably in an amount not greater than 1/16 inch).
  • a predetermined amount preferably in an amount not greater than 1/16 inch
  • one end of the orifice plate is again rigidly secured by means of clamping members.
  • the other end of the orifice plate is coupled to a stretching (tensioning) apparatus comprising (1) a fixed member which is rigidly secured to the fluid jet manifold assembly; (2) a movable member operatively connected to the orifice plate; and (3) means for adjusting the position of the movable member relative to the fixed member in the direction of the longitudinal axis of the orifice plate.
  • the tensioning device may be manually adjusted to place the orifice plate under a predetermined amount of tension. Thereafter, the tensioned and extended plate may be rigidly fixed into position on the manifold assembly.
  • a fluid-jet apparatus 10 in which the present invention finds particular utility is shown in accompanying FIGURE 1.
  • the fluid-jet apparatus 10 generally includes a manifold assembly 12 which defines a fluid supply chamber 14.
  • the lower end of supply chamber 14 establishes an outlet slot 16 so that fluid can pass through a linear array of orifices 18 defined in orifice plate 20.
  • Fluid filament 22a issuing from each orifice 18 breaks into individual droplets 22h.
  • an electrostatic charge is placed upon selected ones of droplets 22b by means of charging electrode 24.
  • Charged ones of droplets 22b are then deflected by deflection electrode 26 towards catching structure 28 while uncharged ones of droplets 22 b proceed on to substrate 30 so as to be deposited thereon and form indicia, patterns or the like generally represented by numeral 32.
  • Orifice plate 20 is shown in a greatly enlarged manner in FIGURE 1 for clarity of presentation. As can be seen, orifice plate 20 is mounted to manifold assembly 12 by means of a pair of laterally opposing clamp members 40. Accompanying FIGURES 2 and 3 more clearly show the clamp members 40 of the present invention.
  • the clamping assembly of the present invention includes a pair of clamp members 40 in opposing relationship to one another.
  • Each clamp member 40 includes a clamp body 44 and a substantially horizontally extending clamp arm 46, the clamp arm 46 thereby defining a bearing surface 47 to bear against the orifice plate 20 when clamp body 44 is clamped to manifold assembly 12 and to maintain a slight clearance between arm 46 and plate 20.
  • Each clamp body 44 also defines a substantially vertical bearing surface 48 which cooperates with a respective one of the vertical bearing surfaces 50 of manifold assembly 12.
  • Manifold assembly 12 is preferably a split-bodied design having upper and lower manifold members 12a, 12b, respectively.
  • the fluid supply chamber 14 is fitted with a turbulence damping structure 13 as more fully disclosed in U.S. Application Serial No. 720,735 to Sutera et al filed April 8, 1985, entitled "BAFFLE TO MINIMIZE TURBULENCE WITHIN ORIFICE PLATE".
  • Each clamp body 44 includes an aperture 45 so that a bolt 52 or like threaded securing means can be placed in recessed surface 54 in registry with a threaded aperture 45a of manifold assembly 12 so as to bridge the space 56 defined between the clamp body 44 and the manifold assembly 12 (see FIGURE 3).
  • the upper end of each clamp body 44 includes a vertically extending flange portion 58 establishing a seating surface 60 which bears against the horizontal opposing surface 62 of the clamp body 44.
  • bearing contact is established between the manifold assembly 12 and the bearing surface 60 of the flange 58 on the one hand and the manifold assembly 12 and the planar surface 47 of the clamp arm 44 through the orifice plate 20 on the other hand so that an advantageous force distribution therebetween occurs. That is, upon tightening of the bolts 52, the linear contact areas established by the planar bearing surface 47 of the clamp arm 46 and the bearing surface 60 of the flange 58 will uniformly distribute the forces applied against the orifice plate 20 so as to substantially prevent bowing thereof about the elongated axis of plate 20.
  • one end 68 of orifice plate 20 be provided with an aperture 70 which registers with a fixed-position peg 72 formed on the manifold assembly 12, particular attention being directed to accompanying FIGURE 4 for the discussion which follows.
  • the other end 74 of the orifice plate 20 is preferably provided with an opening 76 which is enlarged in the axial direction of orifice plate 20 and which accepts a second fixed-position peg 78 therein.
  • Heat is then applied directly to the orifice plate 20 so as to effect thermal expansion thereof.
  • Any suitable means to heat and thus thermally expand the orifice plate can be utilized such as electrical resistance heating, heated air, etc. Most preferred however is the use of heated air (e.g., 180°F) directly impinging upon the orifice plate 20.
  • heated air e.g. 180°F
  • the thermal expansion of the orifice plate 20 is visually perceived by noting displacement of the indicator line 82 (etched onto the exterior visible surface of the orifice plate 20) relative to the scale 84 (etched onto the visible surface of the manifold assembly 12).
  • the scale 84 is subdivided into a plurality of lines having 1/32 inch centers.
  • the other end 74 of the orifice plate 20 is rigidly fixed in position relative to the manifold assembly 12 by means of a screw and clamp assembly 86 thereby maintaining the orifice plate in its thermally-expanded length.
  • the orifice plate 2 0 is then allowed to cool to ambient temperature while being maintained in its expanded length so that upon cooling and thus thermal contraction thereof, tension is applied between the opposing ends 68, 74 of the orifice plate 20 is maintained under a desirable tension so as to aid in its planar mounting to manifold assembly 12.
  • the pair of clamp members 40 as described previously are then positioned so as to complete the mounting of orifice plate 20 onto manifold assembly 12.
  • FIGURES 5, 6 and 7 of the drawings An alternative embodiment of the clamping assembly and clamp members in accordance with the present invention is depicted in FIGURES 5, 6 and 7 of the drawings.
  • orifice plate 20 is shown mounted to the manifold assembly in the same manner described above in which one end of orifice plate 20 is provided with an aperture which registers with a fixed-position peg formed on manifold assembly 12. Enlarged opening 76 in the other end of the orifice plate 20 accepts a second fixed position peg 78.
  • suitable securing means such as screw and clamp assembly 80.
  • the other end of the plate may be rigidly fixed in position relative to manifold assembly 12 thereby maintaining it in its extended and tensioned form.
  • the pair of clamp members 40 as previously described are positioned so as to complete the mounting of the orifice plate 20 onto manifold assembly 12.
  • the clamp members be positioned such that the substantially planar bearing surfaces (shown as 46 and 47 on FIGURE 2) of the clamping members will impact on the planar surface of the orifice plate in precisely the same position and with the same orientation during each successive installation of the orifice plate. It has been found that such precise positioning may be ensured by providing one or more hinge means operatively connecting clamp members 40 to the lower portion of manifold assembly 12.
  • one or more hinge elements 90 and 91 are rigidly secured to clamp members 40 and to lower manifold member 12b by way of threaded securing means (shown by way of example as 95, 96, 97 and 98 in FIGURE 7).
  • the hinged clamp members 40 may thus be swung into position and secured to the manifold assembly to thereby contact the planar surface of the orifice plate in the same manner and in the same location by making bearing contact between the manifold assembly and the bearing surface of flange 58 on the one hand and the manifold assembly 12 and planar surface 47 of clamp arm 44 through orifice plate 20 on the other hand (see FIGURE 2).
  • a plurality of hinge elements may be independently spaced along clamp members 40 to further ensure that an advantageous force distribution occurs between the manifold assembly and orifice plate 20. After hinged clamps 40 are in position, bolts 52 may be tightened. Again, the linear contact areas established by the planar bearing surface 47 of clamp arm 46 and bearing surface 60 will uniformly distribute the forces applied against the orifice plate so as to substantially prevent bowing thereof.
  • FIGURE 5 The details of the hinge means shown in FIGURE 5 are depicted in FIGURES 6 and 7 of the drawings.
  • Each hinge consists of mounting plates 93a and 93b, respectively, which are fixedly secured to clamp members 40 and lower mounting assembly 12b by way of fastening screws 95, 96, 97 and 98.
  • Each mounting plate is attached to hinge pin 99 for rotation about its longitudinal axis.
  • FIGURE 6 shows hinge means 90 fixedly secured to clamping member 40 and lower manifold member 12b.
  • FIGURE 8 generally depicts the mechanical tensioning apparatus in accordance with the invention disposed on the substantially planar orifice mounting surface at one end of orifice plate 20.
  • An exemplary tensioning apparatus is shown generally at 100 and comprises three basic components--a fixed member rigidly secured to one end of the orifice plate mounting surface; a movable member operatively connected to the fixed member and coupled to one end of the orifice plate; means for securing one end of the orifice plate to the orifice plate mounting surface; and means for adjusting the movable member to cause a reciprocal translational movement of the orifice plate and thereby tension the orifice plate prior to its being clamped into position.
  • the fixed member consists of a top mounting plate 103 which is rigidly secured to a first pair of L-shaped lower side members 107 and 108.
  • Plate 103 and side members 107 and 108 are rigidly fixed to lower manifold member 12b by way of machine bolts 104 and are disposed at one end of orifice plate 20 with side members 107 and 108 being laterally spaced on opposite sides of the orifice plate.
  • Top plate 103 is also fixedly secured to side members 107 and 108 by mounting bolts 102.
  • the moveable member in tensioning apparatus 100 consists of side members 109 and 110, each of which slidably cooperates with the orifice plate mounting surface along laterally opposed sides of lower manifold member 12b.
  • Side members 109 and 110 are fixedly secured to a central member 111 by mounting bolts 112a and 112b to thereby form a single movable, integral structure disposed across one end of orifice plate 20.
  • Central member 111 is positioned directly on top of orifice plate 20 and contains coupling means at one end thereof as exemplified by post member or dowel pin 112. The coupling of the moveable member to the orifice plate is accomplished by inserting dowel pin 112 in orifice plate 20.
  • central member 111 and the orifice plate mounting surface also define a space below central member 111 sufficient to insert one end of orifice plate 20.
  • central member 111 is operatively connected to a spring 115 which in turn connects by way of cable means 116 to tension actuator means 117.
  • Actuator means 117 consists primarily of a cross-axis gear assembly whereby the rotational movement of horizontal tensioning knob 118 is transmitted to a rotatable vertical shaft 119 which is disposed substantially perpendicular to tensioning knob 118.
  • Vertical shaft 119 is rotably mounted in bore 120 of top plate 103 in a close fitting manner but is freely rotatable in either direction.
  • the top portion of rotatable shaft 119 contains a worm gear which operatively engages a like gear at one end of tensioning knob 118.
  • the bottom free end of vertical shaft member 119 is attached to cable means 116 which in turn connects to one end of spring 115.
  • one end of orifice plate 20 is rigidly fixed to the orifice plate mounting surface by any suitable securing device such as the screw and clamp assembly shown at 80 on FIGURE 5.
  • An aperture in the free end of orifice plate 20 is aligned with opening 121 in central member 111.
  • the orifice plate is then coupled to the moveable member by inserting dowel pin 112 through opening 121.
  • Tensioning apparatus 100 may be permanently attached to the orifice plate mounting assembly or, alternatively, removed for each orifice plate change, depending on the amount of room available for the fluid jet mounting assembly.
  • the apparatus is mounted and secured on a permanent basis by mounting bolts 104 as shown in greater detail in FIGURE 12.
  • one end of orifice plate 20 may be coupled to central member 111 without removing apparatus 100 because of the clearance between the central member and the mounting assembly as shown at 122 on FIGURE 11.
  • FIGURE 10 is a section view taken along lines 10-10 of FIGURE 9 and shows the movable member and tensioning means in accordance with the invention as well as the connection between the tensioning means and orifice plate 20.
  • the movable member consists of side portions 109 and 110 which are fixedly secured to central member 111 by way of horizontally disposed anchoring bolts 112a and 112b.
  • the combined integral structure slidably cooperates with the top surface of the orifice plate mounting assembly, i.e., along the planar surface of lower manifold assembly 12b.
  • Orifice plate 20 is coupled to the movable member by inserting dowel pin 112 through the opening 121 in central member 111.
  • FIGURE 10 also shows means for applying a pressure force on the top surface of central member 111 by way of a set screw 137 disposed in opening 138 of fixed member 103.
  • the set screw is adjusted to make contact with the top surface of central member 111.
  • Set screw 137 thereby prevents the central member 111 from bowing upwardly as a result of the force applied in a lateral direction during tensioning.
  • Central member 111 is coupled to spring 115 at one end thereof by insertion in elliptical opening 140 in central member 111.
  • the other end of spring 115 is attached to cable means which in turn operatively connects to the free end of rotatable vertical shaft 119 in actuator 117.
  • FIGURE 11 is a section view taken along line 11-11 of FIGURE 9.
  • Machine mounting bolts 104 are disposed in bore openings 105 and 106 and extend through openings in L-shaped side members 107 and 108 and movable side members 109 and 110 for threaded engagement in lower manifold assembly 12b. Openings 105 and 106 are enlarged in the axial direction to allow movable members 109 and 110 to move in a lateral direction during the tensioning operation.
  • the rear elevation view depicted in FIGURE 12 of the drawings shows cable means 116 attached to the free end of rotatable vertical shaft 119.
  • top mounting plate 103 is recessed as shown to provide clearance for horizontal tensioning knob 118.
  • FIGURES 13 and 14 of the drawings An alternative embodiment of the tensioning apparatus in accordance with the present invention is depicted in FIGURES 13 and 14 of the drawings.
  • the fixed member consists of mounting plate 201 which is rigidly secured in position relative to the orifice plate mounting surface by way of mounting bolts 202 and 203, respectively.
  • the mounting bolts pass through bore openings in movable plate 205 and into lower mounting assembly 12b to fixedly secure top mounting plate 201.
  • Movable plate 205 slidably cooperates with the orifice plate mounting surface to provide reciprocal translational movement of orifice plate 20 during tensioning.
  • the central portion of movable member 205 is disposed on top of orifice plate 20 and contains eyelet coupling means 207 at one end thereof.
  • one end of movable member 205 operatively connects to spring 208 which in turn connects by way of cable means 209 to tension actuator 212 at its free end 213.
  • the actuator consists of a cross-axis gear assembly whereby the rotational movement of horizontal tensioning knob 215 is transmitted to a rotatably-mounted vertical shaft member oriented at 90° thereof.
  • one end of the orifice plate is rigidly secured to the orifice plate mounting surface by using a screw and clamp assembly such as that shown by item 80 in FIGURE 1.
  • the other end of the plate is positioned in alignment with opening 220 in movable member 205.
  • Dowel pin 226 is then inserted in opening 220 to operatively connect orifice plate 20 to movable member 205 and set screw 227 is adjusted to make contact with the top surface of the moveable member.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP19860305005 1985-07-01 1986-06-27 Method and assembly for mounting fluid-jet orifice plate Withdrawn EP0214720A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75058985A 1985-07-01 1985-07-01
US750589 1985-07-01

Publications (1)

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EP0214720A1 true EP0214720A1 (en) 1987-03-18

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EP19860305005 Withdrawn EP0214720A1 (en) 1985-07-01 1986-06-27 Method and assembly for mounting fluid-jet orifice plate

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EP (1) EP0214720A1 (ja)
JP (1) JPS6270054A (ja)
AU (1) AU5935686A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014611A1 (en) * 1991-02-22 1992-09-03 Sergei Nikolaevich Maximovsky Ink-jet printing head
US5971522A (en) * 1997-03-19 1999-10-26 Fujitsu Limited Ink-jet head for providing accurate positioning of nozzles of segment chips on a holder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118064682B (zh) * 2024-04-19 2024-06-18 合肥工业大学 一种自适应张紧式板材电脉冲处理设备及工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787881A (en) * 1972-09-18 1974-01-22 Mead Corp Apparatus and method for bar code printing
US4343013A (en) * 1980-10-14 1982-08-03 Ncr Corporation Nozzle plate for ink jet print head
DE3227638A1 (de) * 1981-07-24 1983-02-24 Sharp K.K., Osaka Kopf fuer tintenstrahldrucker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787881A (en) * 1972-09-18 1974-01-22 Mead Corp Apparatus and method for bar code printing
US4343013A (en) * 1980-10-14 1982-08-03 Ncr Corporation Nozzle plate for ink jet print head
DE3227638A1 (de) * 1981-07-24 1983-02-24 Sharp K.K., Osaka Kopf fuer tintenstrahldrucker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992014611A1 (en) * 1991-02-22 1992-09-03 Sergei Nikolaevich Maximovsky Ink-jet printing head
US5402163A (en) * 1991-02-22 1995-03-28 Samsung Electronics Co. Ltd. Jet print head
US5971522A (en) * 1997-03-19 1999-10-26 Fujitsu Limited Ink-jet head for providing accurate positioning of nozzles of segment chips on a holder
DE19745980B4 (de) * 1997-03-19 2009-06-10 Fujifilm Corp. Tintenstrahlkopf zum Vorsehen eines akkuraten Positionierens von Düsen von Segmentchips auf einem Halter

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JPS6270054A (ja) 1987-03-31
JPH0521075B2 (ja) 1993-03-23
AU5935686A (en) 1987-01-08

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