US3784739A - Apparatus for engraving a cylinder with repeated overlapping patterns - Google Patents

Apparatus for engraving a cylinder with repeated overlapping patterns Download PDF

Info

Publication number
US3784739A
US3784739A US00185947A US3784739DA US3784739A US 3784739 A US3784739 A US 3784739A US 00185947 A US00185947 A US 00185947A US 3784739D A US3784739D A US 3784739DA US 3784739 A US3784739 A US 3784739A
Authority
US
United States
Prior art keywords
engraving
cylinder
scanning
pattern
machine
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
US00185947A
Other languages
English (en)
Inventor
Vos F De
Steege J Ter
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.)
Werkspoor Amsterdam NV
Original Assignee
Werkspoor Amsterdam NV
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 Werkspoor Amsterdam NV filed Critical Werkspoor Amsterdam NV
Application granted granted Critical
Publication of US3784739A publication Critical patent/US3784739A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/12—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means
    • B23Q35/127—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using non-mechanical sensing
    • B23Q35/128—Sensing by using optical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30084—Milling with regulation of operation by templet, card, or other replaceable information supply
    • Y10T409/301176—Reproducing means
    • Y10T409/301624—Duplicating means
    • Y10T409/30168—Duplicating means with means for operation without manual intervention
    • Y10T409/30224—Duplicating means with means for operation without manual intervention and provision for circumferential relative movement of cutter and work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303416—Templet, tracer, or cutter
    • Y10T409/303472—Tracer
    • Y10T409/303528—Adapted to trigger electrical energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y10T409/307224—Milling including means to infeed rotary cutter toward work with infeed control means energized in response to activator stimulated by condition sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30784—Milling including means to adustably position cutter

Definitions

  • SPOHSB t0 pp movement of the heads and the tual stop signal is generated after the stepping movement so that engraving will always actually stop at some point along the next circumferential line while neither head is moving. Thereafter, further stepping of the engraving head is suspended until the engraving is to be restarted so that the engraving head idles along the path on which engraving ceased.
  • the signal to restart engraving is timed to occur immediately prior to the point at which the stop engraving signal occurred so that there is always the slight overlap between stop and restart, and no non-engraved gaps occur between stop and restart.
  • stop signal start I derived from I I I I I I I I I I I I I signal I 7 T i I I IF overlap- I 2%;? 0
  • a master cylinder and a printing form cylinder are rotated synchronously while a scanning head and an engraving head respectively associated therewith are fed axially along the lengths of their associated cylinders.
  • the scanning path and, likewise, the engraving path are helical lines on the respective cylinders.
  • the present invention overcomes the above-noted difficulties by virtue of the fact that the motions of the scanning and engraving heads are modified so that each is moved axially ofits associated cylinder only intermittently so that the scanning and engraving paths are each in the form of a series ofcircumferentiallines extending substantially completely around the circumference of their associated cylinders with the end of one line being joined to the beginning of the next by a short helical line to provide continuous and complete scan ning and engraving paths.
  • it is possible to effect both the control signal to stop engraving and to restart engraving while the scanning head and the engraving head are not moving, thereby eliminating the aforesaid coasting problem.
  • FIG. II is a diagrammatic view illustrating the problems associated with the prior art
  • FIG. 2 is a view similar to FIG. I but showing the scanning line path according to the present invention
  • FIG. 3 is a view similar to FIGS. I and 2 but showing the engraving line path associated with the present invention and, more particularly, the manner in which repetitive patterns are produced;
  • FIG. 4 is a diagrammatic view illustrating a preferred embodiment of the invention.
  • FIG. 5 is a perspective view showing major portions of the preferred embodiment of the invention.
  • FIG. s is a timing diagram showing several steps of operation.
  • FIG. 7 is a diagram showing the circuit by means of which stop and start signals are generated.
  • a printing form cylinder is indicated therein generally by the reference character P which is rotating about the axis A and relative to which a scanning head is moving axially therealong to engrave according to a master pattern along the helical line H as shown.
  • the scanning head associated with the master cylinder engages a stop indicating the end of a scanning cycle, a stop signal is generated while the engraving head is at the point a on the helical engraving line H, the cylinder P continuing its rotation.
  • the inertia of the engraving head will be such that the point at which its physical travel stops will be even further delayed in time as is indicated by the point c and, in particular, this latter point is very unpredictable.
  • the points a, b and c lie in spaced relation as shown so that upon recommencernent or restarting of engraving, even if the engraving head commences engraving immediately upon reception of the restart signal, a gap g in which no engraving appears inevitably is produced.
  • FIGS. 2 and 3 showing the master cylinder and the engraved cylinder respectively.
  • the two cylinders are shown in a condition where there are rotating in unison and as will be hereinafter described in detail, the respective scanning and engraving heads are intermittently stepped axially along the cylinders which takes place during a rotation angle of about 60 for each cylinder.
  • the scanning and engraving heads are stationary with the net result at the scanning and engraving paths each are in the form of a series of circumferential lines l with the end of each such being joined to the beginning of the next through the medium of a short helical line portion h, see particularly FIG. 2.
  • the scanning head engages a stop and prepares the system for subsequent generation of a stop-engrave signal which is generated after the end point n is reached and while the engraving head is motionless.
  • further stepwise motion of the engraving head is suspended and, at the same time, mechanism is operated to return the scanning head to its initial position, the engraving of repetitive patterns from a single master being assumed.
  • the point at which the scanning head starts to return may be at a point such as is indicated by the point r in FIG. 2, the scanning head describing a helical reversed line back to the point s on the first line ofthe master at which it has been returned to its initial scanning poition.
  • a start or restart-engrave signal is generated at the point t which, as shown, is slightly in advance of the position of the point at which the stop engrave signal is generated so that the engraving head will begin engraving again by the time the relative position I of FIG.
  • the dash dot lines of engraving are shown in which area the second pattern will be produced, and so on for as many patterns as are desired along the axial length of the engraved printing cylinder.
  • FIG. 4 a preferred embodiment of the invention for carrying out the principles described hereinabove is shown.
  • the master cylinder is designated by the reference character 1
  • the printing form cylinder is designated by the reference character 2.
  • the machine includes a main frame indicated generally by the reference character F having ways or guide members W and W for the scanning head 3 and the engraving head 4 respectively, there being provided lead screws 25 and 25' respectively for advancing the scanning head 3 and the engraving head 4 axially with respect to the cylinders and 1 and 2 as will be hereinafter described.
  • the two cylinders l and 2 are engaged at one end each thereof by the driving spindles or chucks 5 and 5' and tail stock devices 6 and 6' are supported in the usual manner on the respective ways W and W and carry the adjustable tail stock centers 5" and 5", as shown whereby the cylinders 1 and 2 are supported about fixed axes and are driven in unison with their respective members 5 and 5.
  • a main drive motor 14 is provided with an eddy current clutch for synchronization purposes and its shaft 32 carries a drive sprocket 33 by means of which the chain 34 drives the sprocket 33 on the shaft 35.
  • a screen generator device 13 is connected to the shaft 35 whose purpose is to provide an output signal coordinated with the speed or rotation of the cylinders 1 and 2 to produce the requisite number of engraving pulses per revolution of the engraving cylinder 2, such device forming no part of the present invention.
  • the shaft 35 carries a gear 36 which is in mesh with the gear 37 on the shaft 38, which shaft constitutes the main drive shaft for the assembly and may be provided with a brake 29 by means of which the entire mechanism may be stopped.
  • Transmission assemblies 10 and 10' carry the drive from the main shaft 38 to the two cylinders 1 and 2, the former through the intermediary I of the main gear which drives the shaft 51, and through the gear train 52,53 or through the gear train 54,55 of the auxiliary transmission 11 to the shaft 56 which drives the chuck 5 previously described.
  • a dog clutch 9 is provided on the shaft 56 for engagement either with the gear 53 or with the gear 55, the former for effecting unison rotation of the cylinders 1 and 2 and the latter for effecting a 2:1 drive ratio between the cylinders 1 and 2.
  • the transmission 10' includes the gear 57 which,- like the gear 50 engages the common gear 58 of the shaft 38, and the gear set 59 and 60 for driving the shaft 61 which is coupled to the chuck 5' for the cylinder 2.
  • a dog clutch 8 is provided selectively to couple the shaft 61 to the gear 60 and the shaft 61 carries a cam 26 engaging with a follower 39 to actuate the mechanism 27 which reciprocates the rods 40 and 41 in the manner more particularly pointed out hereinafter to effect the intermittent stepping motions of the cylinders l and 2 by partial rotations, of the lead screws 25 and 25'.
  • Reference characters 12 and 16 on the shafts 56 and 61 respectively represent, in the case of the device 12, a magnetic memory device forming no part of the pres ent invention by means of which repetitions of the master form circumferentially on the printing cylinder 2 may be effected.
  • the device 16 is a pulse generator which produces pulses for actuating the engraving member at a selected rate per revolution of the cylinder 2.
  • the details of the circuit 16 may be ascertained from the description of my copending application Ser. No. 185,946, filed Oct. 4, 1971.
  • the rods 40 and 41 reciprocate in timed relationship with the rotation of the cylinder 2 and these rods are connected to the several clutches l7, l8 and 20, as diagrammatically illustrated in FIG. 4.
  • Members 19 and 21 are brake devices which are normally engaged to prevent rotation of the respective lead screws 25 and 25' but which are deenergized by the mechanism 16 while, at the same time, the clutches l8 and are energized while the rods 4G and 41 are reciprocated in one direction and then the clutches are released when the rods return in the opposite direction, thereby effecting partial rotations of the respective lead screws and 25.
  • the clutch l7 selectively is actuated rather than the clutch 18 which, through the reversing gear set 44,45, imparts the opposite direction of rotation to the lead screw 25 and thereby feeds the scanning head in the direction opposite to the direction imparted to the engraving head 4.
  • a fast rewind or return motor 23 which is coupled through the sprocket 62, chain 63, sprocket 64 and clutch 22 to the shaft 43 for operating the lead screw 25 to return the scanning head to an initial scanning position when repetitive scannings of the master pattern are to be provided.
  • a fast return motor 24 is provided for the lead screw 25 as will be clearly evident.
  • stop switch 31 is adjusted to be engaged by the scanning head 3 at the end of the scan cycle as described hereinabove which, through the control circuit I08, releases the brake 19, steps the clutch 22, and maintains the clutches l7, l8 and 20 deenergized while the motor 23 returns the scanning head to its initial scanning position whereupon it engages stop switch 30 which prepares the scanning head for a start engrave operation in association with the engraving head 4 which has remained in its last position during the return movement of the scanning head, as has been described hereinabove. The next repetitive scanning and engraving cycle is then initiated.
  • FIG. 5 certain of the components whose construction is not readily apparent from FIG. 4 are shown. Principally, the cam 26 and follower 39 shown wherein it will be seen that the follower is carried by an arm 39' fixed to a shaft 70, the shaft 70 being journalled in a fixed member 71 and carrying the two upstanding fingers 72 and 73 which project through openings in respective arms and 4t, as shown.
  • the two arms have followers 74 and 74 which are adaptively engaged by the fingers 72 and 73 to impart motion to the rods 40 and 41 toward the right in FIG. 5, the return motion being provided for by the respective springs 76 and 77 as shown.
  • the strokes of the rods 4b and 41 are separately adjustable by means of the carrier blocks 78 and 79 which may be raised or lowered by means ofthe adjusting bars 42 and 42.
  • the two carrier blocks 78 and 79 carry cars 80 and 81 which are provided with journal shafts such as the shaft 82 by means of which the respective links 83 and 84 are connected thereto, the upper ends of these links being pivoted to the ends of the respective rods 40 and 41 as shown.
  • the two rods 4% and ll are pivoted by means of pins 35 and $6 to the extension bars ltl and ll, to the free ends of which the previously mentioned springs 76 and 77 are anchored and two pins 87 and 38 on the extension ll secure same to the respective levers 89 and 9% associated with the respective clutch devices 17 and lb.
  • a pin 9i connects the bar ill to the lever 92 associated with the clutch Ztl.
  • FIG. 7 A preferred embodiment of the stop and start portions of the control circuit M8 for effecting the operation as above described is shown in FIG. 7, and a timing diagram illustrative of the control operations is shown in FIG. 6, to which figures reference is now had.
  • the pick-up heads as and 47' (FIG. 5) operate in conjunction with the gaps 4n" and d7 in the discs and 47 such that when the beginnings of the gaps are encountered, negative-going pulses are produced thereby whereas when theends of the gaps are reached, positive-going pulses are produced. These pulses are used with the logic circuit of FIG. 6 to provide the desired control for generating the stop and start signals.
  • the direction of rotation of the control discs 46 and 47 is counterclockwise in FIG. 5.
  • the disc 46 controls the stepping motions of the heads.
  • logic circuitry is activated to deenergize the brakes l9 and 2ll and simultaneously to energize or engage the clutches I8 and 24 ⁇ or the clutches l7 and 2t), dependent upon whether the scanning head is to be stepped in the same or the opposite direction to the engraving head.
  • the clutches are engaged and the cam an is operative to actuate the levers W and 41 at time 2 the stepping motions will take place, as indicated in FIG. 6.
  • the end of the gap 47" is reached and the head 47' produces a positivegoing pulse at time t, which causes the output of the flip-flop Ztlll to go high.
  • the AND gate 22 produces an output causing the normally low output from the flip-flop to go high so that when the next pulse from the pulse generator to for the engraving device occurs, a stop signal will be produced at the output of the AND gate 2ll4.
  • This stop signal causes override of the stepping actions of the engraving head by keeping the brake 21 engaged and the clutch disengaged until after the switch 30 is engaged by the scanning head, and also causes the brake 19 to be deenergized and both clutches 17 and 18 to remain deenergized until after the switch 30 is engaged. Further, the stop signal causes the clutch 22 to become energized to cause the scanning head to be returned until such return is terminated by the switch 30.
  • the output of the flip-flop 206 is caused to go high and then when the gap 47" is first encountered by the head 47, the negative-going pulse (time pointt is inverted at 208 causing the second input to the AND gate 205 to go high.
  • the third input to the AND gate 205 properly times the start signal output from the AND gate 205 so that the engraving device may start the first engraving action in proper synchronism with the pulse signals from the circuit 16.
  • control means for actuating said first and said second feed means during a minor portion only of each revolution of said scanning means whereby consecutive scanning and engraving line paths swept past the scanning means and the engraving means respectively each are in the form of a circumferentially extending major portion disposed in a plane normal to the rotation axis of the associated cylinder and a helically extending minor portion connecting the end of each major portion with the beginning of the next consecutive major portion;
  • repeat means responsive to return of said scanning head to said first scan line for initiating a subsequent scan-engrave cycle in advance of the point on which engraving ceased and while said engraving means is in said axially fixed relation to cause element generating sequential signals during successive revolutions of said second cylinder, the second of which successive signals causes cessation of engraving and the first of which causes engraving to restart whereby restarting of engraving during one revolution of the second cylinder overlaps engraving produced during a prior revolution.
  • control means includes reciprocating-to-rotary motion means for periodically actuating said first and second feed means correspondingly to step said scanning means and said engraving means axially of their cylinders.
  • each path is in the form of a circumferentially extending major portion disposed in a plane normal to the rotation axis of said cylinder and a helically extending minor portion connecting the end of each major portion with the beginning of the next consecutive major portion;
  • a machine for producing gravure forms comprising, in combination:
  • pattern cylinder means and gravure cylinder means coupled for common rotation at a selected speed ratio; means for imparting incremental motions of said scanning means and said engraving means axially along their respective cylinder means only once during each revolution of such cylinder means whereby scanning and engraving paths are described each in the form of a circumferentially extending major portion disposed in a plane normal to the rotation axis of the respective cylinder means and a helically extending minor portion connecting the end of each major portion with the beginning of the next consecutive major portion; means for continuously rotating said pattern cylinder means and said gravure cylinder means during an engraving sequence;

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
US00185947A 1968-04-02 1971-10-04 Apparatus for engraving a cylinder with repeated overlapping patterns Expired - Lifetime US3784739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL686804633A NL142619B (nl) 1968-04-02 1968-04-02 Inrichting voor het regel voor regel vervaardigen van cilindrische rasterdrukvormen met zich herhalende motieven.

Publications (1)

Publication Number Publication Date
US3784739A true US3784739A (en) 1974-01-08

Family

ID=19803217

Family Applications (1)

Application Number Title Priority Date Filing Date
US00185947A Expired - Lifetime US3784739A (en) 1968-04-02 1971-10-04 Apparatus for engraving a cylinder with repeated overlapping patterns

Country Status (5)

Country Link
US (1) US3784739A (de)
CH (1) CH486323A (de)
DE (1) DE1915965C3 (de)
GB (1) GB1278123A (de)
NL (1) NL142619B (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010320A (en) * 1972-10-06 1977-03-01 Schablonen Technik Kufstein Ges.M.B.H. Drum recording means with dual scanning heads
US4254439A (en) * 1979-12-26 1981-03-03 International Business Machines Corporation Facsimile mid-page restart
US4323928A (en) * 1976-06-11 1982-04-06 Zed Instruments Limited Copying process for producing a seamless copy from an unjointed original
WO1995028053A1 (en) * 1994-04-06 1995-10-19 Ohio Electronic Engravers, Inc. Method and apparatus for selectively linearizing cells in an engraver
WO1995031332A1 (en) * 1994-05-12 1995-11-23 Ohio Electronic Engravers, Inc. Method and apparatus using multiple engraving heads
WO1996026071A1 (en) * 1995-02-21 1996-08-29 Ohio Electronic Engravers, Inc. Engraving system and method
US5609448A (en) * 1995-04-04 1997-03-11 Dainippon Screen Mfg. Co., Ltd. Apparatus for manufacturing plate for gravure
US5663803A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Engraving method and apparatus for engraving areas using a shaping signal
US5663802A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Method and apparatus for engraving using multiple engraving heads
US5671063A (en) * 1993-02-25 1997-09-23 Ohio Electronic Engravers, Inc. Error tolerant method and system for measuring features of engraved areas
US5675420A (en) * 1995-01-23 1997-10-07 Ohio Electronic Engravers, Inc. Intaglio engraving method and apparatus
US5691818A (en) * 1993-02-25 1997-11-25 Ohio Electronic Engravers, Inc. System and method for enhancing edges and the like for engraving
US5737090A (en) * 1993-02-25 1998-04-07 Ohio Electronic Engravers, Inc. System and method for focusing, imaging and measuring areas on a workpiece engraved by an engraver
US5831746A (en) * 1993-02-25 1998-11-03 Ohio Electronic Engravers, Inc. Engraved area volume measurement system and method using pixel data
US6025921A (en) * 1995-01-23 2000-02-15 Ohio Electronics Engravers, Inc. Method and apparatus for engraving a mixed pattern
US6347891B1 (en) 1995-04-26 2002-02-19 Ohio Electronic Engravers, Inc. Engraving system and method comprising different engraving devices
US6433890B1 (en) 1998-09-24 2002-08-13 Mdc Max Daetwyler Ag System and method for improving printing of a leading edge of an image in a gravure printing process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US23914A (en) * 1859-05-10 Improvement in harrows
US2881246A (en) * 1955-09-27 1959-04-07 Fairchild Camera Instr Co Engraving machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US23914A (en) * 1859-05-10 Improvement in harrows
US2881246A (en) * 1955-09-27 1959-04-07 Fairchild Camera Instr Co Engraving machine

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010320A (en) * 1972-10-06 1977-03-01 Schablonen Technik Kufstein Ges.M.B.H. Drum recording means with dual scanning heads
US4323928A (en) * 1976-06-11 1982-04-06 Zed Instruments Limited Copying process for producing a seamless copy from an unjointed original
US4254439A (en) * 1979-12-26 1981-03-03 International Business Machines Corporation Facsimile mid-page restart
US5671063A (en) * 1993-02-25 1997-09-23 Ohio Electronic Engravers, Inc. Error tolerant method and system for measuring features of engraved areas
US5691818A (en) * 1993-02-25 1997-11-25 Ohio Electronic Engravers, Inc. System and method for enhancing edges and the like for engraving
US5894354A (en) * 1993-02-25 1999-04-13 Ohio Electronic Engravers, Inc. Method and apparatus for engraving patterns with and without image feedback
US5886792A (en) * 1993-02-25 1999-03-23 Ohio Electronic Engravers, Inc. Engraver for defining/generating edges or edge signals
US5737090A (en) * 1993-02-25 1998-04-07 Ohio Electronic Engravers, Inc. System and method for focusing, imaging and measuring areas on a workpiece engraved by an engraver
US6614558B1 (en) 1993-02-25 2003-09-02 Mdc Max Daetwyler Ag Engraver and method for focusing and measuring areas on a workpiece engraved by the engraver
US5831746A (en) * 1993-02-25 1998-11-03 Ohio Electronic Engravers, Inc. Engraved area volume measurement system and method using pixel data
US5663803A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Engraving method and apparatus for engraving areas using a shaping signal
US5663802A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Method and apparatus for engraving using multiple engraving heads
WO1995028053A1 (en) * 1994-04-06 1995-10-19 Ohio Electronic Engravers, Inc. Method and apparatus for selectively linearizing cells in an engraver
US5519502A (en) * 1994-04-06 1996-05-21 Ohio Electronic Engravers, Inc. Method and apparatus for selectively linearizing cells in an engraver
US5492057A (en) * 1994-05-12 1996-02-20 Ohio Electronic Engravers, Inc. Method and apparatus for positioning at least one engraving head
CN1085586C (zh) * 1994-05-12 2002-05-29 Mdc玛克斯达特韦勒股份公司 多个刻头的定位方法和使用该方法的刻制机
WO1995031332A1 (en) * 1994-05-12 1995-11-23 Ohio Electronic Engravers, Inc. Method and apparatus using multiple engraving heads
US5675420A (en) * 1995-01-23 1997-10-07 Ohio Electronic Engravers, Inc. Intaglio engraving method and apparatus
US6525839B1 (en) 1995-01-23 2003-02-25 Mdc Max Daetwyler Ag Engraving system and method for engraving intaglio and non-intaglio patterns
US6025921A (en) * 1995-01-23 2000-02-15 Ohio Electronics Engravers, Inc. Method and apparatus for engraving a mixed pattern
US5892589A (en) * 1995-01-23 1999-04-06 Ohio Electronic Engravers, Inc. Engraving system and method for engraving intaglio and non-intaglio patterns
WO1996026071A1 (en) * 1995-02-21 1996-08-29 Ohio Electronic Engravers, Inc. Engraving system and method
US5706100A (en) * 1995-02-21 1998-01-06 Ohio Electronic Engravers, Inc. Engraving system and method for helical and circumferential engraving
US5555473A (en) * 1995-02-21 1996-09-10 Ohio Electronic Engravers, Inc. Engraving system and method for helical or circumferential engraving
US5609448A (en) * 1995-04-04 1997-03-11 Dainippon Screen Mfg. Co., Ltd. Apparatus for manufacturing plate for gravure
US6347891B1 (en) 1995-04-26 2002-02-19 Ohio Electronic Engravers, Inc. Engraving system and method comprising different engraving devices
US6007230A (en) * 1995-05-04 1999-12-28 Ohio Electronic Engravers, Inc. Engraving system and method with arbitrary toolpath control
US6433890B1 (en) 1998-09-24 2002-08-13 Mdc Max Daetwyler Ag System and method for improving printing of a leading edge of an image in a gravure printing process

Also Published As

Publication number Publication date
DE1915965C3 (de) 1975-10-02
DE1915965B2 (de) 1975-02-20
DE1915965A1 (de) 1969-10-23
NL142619B (nl) 1974-07-15
NL6804633A (de) 1969-10-06
CH486323A (de) 1970-02-28
GB1278123A (en) 1972-06-14

Similar Documents

Publication Publication Date Title
US3784739A (en) Apparatus for engraving a cylinder with repeated overlapping patterns
JP2937361B2 (ja) レーザ加工機
US2656240A (en) Recording apparatus for the reception of message characters
US2063614A (en) Method and apparatus for making printing plates
DE2751534A1 (de) Tintenstrahl-drucker zum bustrophedonen drucken
US5706100A (en) Engraving system and method for helical and circumferential engraving
US4244291A (en) Printer with a fixed and an axially movable character ring
JPH11147326A (ja) 画像記録装置
US2658106A (en) Facsimile printing telegraph system and apparatus
US4044382A (en) Transmitting system for facsimile and the like
US4323928A (en) Copying process for producing a seamless copy from an unjointed original
US1727194A (en) Electromagnetic signal transmission
GB1588743A (en) Methods of obtaining digital reproduction data for screening colour separations
US2356156A (en) Bed motion mechanism
US4728206A (en) Printing control device and method
GB1379765A (en) Controlling a machine with signals derived from a pattern
DE2320894C3 (de) Synchronisiersystem
US3855923A (en) Print control system for high speed printers
JPS58102779A (ja) 強調文字印字制御方式
US3687071A (en) Timing mechanism for printing apparatus employing flying printing action
DE3141623C2 (de)
JPH03162974A (ja) ドットラインプリンタ
SU1193701A1 (ru) Устройство дл центрировани изображений объектов
JPS61111067A (ja) 記録装置
JPH04201464A (ja) プリンタ装置