US3730011A - Precision drive for printing cylinder - Google Patents

Precision drive for printing cylinder Download PDF

Info

Publication number
US3730011A
US3730011A US00161225A US3730011DA US3730011A US 3730011 A US3730011 A US 3730011A US 00161225 A US00161225 A US 00161225A US 3730011D A US3730011D A US 3730011DA US 3730011 A US3730011 A US 3730011A
Authority
US
United States
Prior art keywords
teeth
belt
cylinder
drive
toothed
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
US00161225A
Other languages
English (en)
Inventor
L Cahill
G Denlinger
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.)
Eastman Kodak Co
Mead Corp
Original Assignee
Mead Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mead Corp filed Critical Mead Corp
Application granted granted Critical
Publication of US3730011A publication Critical patent/US3730011A/en
Assigned to EASTMAN KODAK COMPANY A NJ CORP. reassignment EASTMAN KODAK COMPANY A NJ CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEAD CORPORATION THE A CORP. OF OH
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • F16H7/023—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts with belts having a toothed contact surface or regularly spaced bosses or hollows for slipless or nearly slipless meshing with complementary profiled contact surface of a pulley

Definitions

  • a precision rotary drive for a printing cylinder includes a toothed belt having outer and inner teeth, the outer teeth engaging a toothed driven wheel to the printing cylinder, with the wheel having the same number of teeth as the outer teeth on the belt, and a power driven smaller toothed wheel engaging the teeth on the interior of the belt.
  • the belt is constructed initially of one piece, and split longitudinally and the parts moved longitudinally with respect to each other in order to have teeth formed from like parts of material spaced longitudinally from each other in the separate sections.
  • a typical drive previously used for such a system has been a combination of sychronous motor and toothed drivebelt of conventional type to rotate the drum.
  • This combination causes the cumulative errors of belt tooth pitch and driven pulley pitch to be added and subtracted from the mean value during successive revolutions, thus leading to an error in the true position of the drop placements.
  • Such errors for instance show up as a wavy line instead of a straight line when a longitudinal line is desired.
  • a toothed belt drive two improvements are incorporated in a toothed belt drive, thereby providing a smooth continuous rotary drive to the drum, and effectively minimizing the unevenness in lines on the print running longitudinally of the rotating cylinder.
  • One feature of the novel drive provided by this invention is that a wide manufactured toothed belt or sleeve is split into a number of separate narrower belts, and .these narrower belts are shifted longitudinally of each other and then incorporated in the drive. This distributes and minimizes any slight misalignments or manufacturing errors in the original toothed belt, to avoid this source of perturbations or unevenness when the belt is used in the drive system.
  • the toothed belt employed is of a specific type in which both surfaces of the belt are provided with driving teeth.
  • a toothed wheel is fastened to the cylinder, or to its drive shaft, and the number of teeth in the cylinder wheel is equal to the number of teeth on the exterior surface of the toothed belt.
  • a toothed driving wheel or sprocket is located to one side of the toothed cylinder wheel, and it engages the inner teeth on the belt, and a corresponding idler toothed wheel on the other side of the cylinder guides the belt such that there is contact between the exterior teeth on the belt and the toothed cylinder wheel over a substantial number of teeth.
  • the primary object of this invention is to provide a precision rotary drive for a printing cylinder, and in particular to provide such a drive for printing systems employing one or more drop genera tors, where images are created by precision placement of individual drops of marking liquid; to provide such a system wherein a toothed belt has teeth on its outer surface equal in number to and contacting a toothed driven wheel which in turn is connected to rotate the printing cylinder; to provide such a drive arrangement wherein the toothed belt is subdivided into a plurality of independent sections obtained by splitting an original single belt into a number of independent components of equal length, and then shifting these components longitudinally with respect to each other to align different portions of different teeth with respect to the original manufactured belt.
  • FIG. 1 is a schematic showing of the overall arrangement of the toothed belt drive
  • FIG. 2 is a drawing showing details of the mounting and arrangement of a single drop generator
  • FIG. 3 is a schematic cross sectional view showing details of the drop generator
  • FIG. 4 is an enlarged partial view showing the split sections of the drive belt
  • FIG. 5 is the diagram showing a grid line or network constructed in accordance with a device using prior art synchronous drives.
  • FIG. 6 is a diagram similar to FIG. 5 showing a grid network constructed with the printing device having the drive of the present invention.
  • the drop generator 10 is shown mounted on an adjustable bracket 12 to track over the surface of a printing cylinder l4'which carries on its surface a receiving member-.15 such as a sheet of paper.
  • the cylinder rotates in the direction shown by the arrow, and at one end of the cylinder, or fastened to a shaft common with the cylinder, there is a toothed driven wheel 18 which is the driven wheel for the printing cylinder.
  • This toothed wheel is also shown in FIG. 1, together with the shaft 19 carrying it and the cylinder.
  • a drive is indicated schematically at 20, having a high speed output shaft 22, which extends to the driving toothed wheel 25, shown in FIG. 1.
  • the drive also has a separate output shaft 26, which is connected to a lead screw 28 that engages a ball nut 29 carried in the slide 30, which in turn provides the mounting for the bracket 12.
  • This forms the support for the drop generator 10, arranged to move it longitudinally of the printed cylinder, in order to scan over successive adjoining or adjacent circular paths over the surface of the receiving member 15.
  • the drive to shaft 26 may be either at a lower speed correlated to the speed of shaft 22, causing the head to follow a shallow helical path, or preferably the drive to shaft 26 may be intermittent to step the slide and the drop generation once for each revolution of the drum, thereby causing the generator to scan parallel lines circumferentially of the cylinder and across the moving surface of the receiving member 15. Details of the drop generator are disclosed in the aforementioned U. S. Pat. No. 3,588,906, and for convenience some of the parts are shown in FIG. 3.
  • these include a supply tube 30 for the marking liquid leading to an orifice 31 from which ajet filament of liquid issues and separates into drops.
  • the drops are separated under the stimulation of a suitable stimulating device 32 causing the size and spacing of the drops to be of a desired regular pattern.
  • the separation of drops from the filament occurs in the region of a charging electrode 35, at which point the drops are selectively electrostatically charged, and the drop path then extends past suitable deflecting electrodes 36, where the path of charged drops is shifted.
  • a suitable catcher 38 removes unwanted drops from the stream which then continues out the end of the drop generator.
  • the arrangement may be such that either charged or uncharged drops move into the catcher 38.
  • a toothed driving belt 44 passes over the driven wheel 18, around the driving wheel 25, and around the idler wheel 40. Due to the fact that the belt 44 has teeth on both its exterior and its interior surface, precise transmission of rotary motion from the driving wheel to the driven wheel 18 is accomplished through the belt. In some arrangements the paths of the lower driving and upper return flights of the belt may be close to each other, in which case a suitable stationary shield or separator 46 can be inserted as shown.
  • a relatively wide belt or sleeve is marked and split longitudinally into several parts 44a, 44b, 44c, and 44d as shown in FIG. 4. After this, the parts are shifted longitudinally to bring portions of the original teeth into alignment with portions of others of the original teeth. A random re-alignment has proven satisfactory, however a predetermined pattern has also been successfully employed.
  • a flexible drive belt having teeth on both its inside and its outside, the number of such outside teeth equalling the number of said driven teeth
  • a rotary drive as defined in claim 1, wherein said belt comprises a plurality of independent parallel sections initially formed from the same piece of toothed belt material, severed from each other, and having teeth formed from like parts of the material spaced longitudinally from each other in the separate sections whereby irregularities in tooth contour or spacing are averaged out in the final drive construction.
  • drop generator means capable of projecting individual liquid drops along a path at predetermined spacing, including an orifice receiving a flow of liquid under pressure
  • I cylinder constructed and arranged to drive the receiving member past said path, driven member adapted for attachment to the cylinder and including a plurality of driven teeth,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ink Jet (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Handling Of Sheets (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Rotary Presses (AREA)
US00161225A 1971-07-09 1971-07-09 Precision drive for printing cylinder Expired - Lifetime US3730011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16122571A 1971-07-09 1971-07-09

Publications (1)

Publication Number Publication Date
US3730011A true US3730011A (en) 1973-05-01

Family

ID=22580357

Family Applications (1)

Application Number Title Priority Date Filing Date
US00161225A Expired - Lifetime US3730011A (en) 1971-07-09 1971-07-09 Precision drive for printing cylinder

Country Status (7)

Country Link
US (1) US3730011A (enrdf_load_stackoverflow)
JP (1) JPS5622706B1 (enrdf_load_stackoverflow)
CA (1) CA972985A (enrdf_load_stackoverflow)
CH (1) CH566499A5 (enrdf_load_stackoverflow)
DE (1) DE2232674C2 (enrdf_load_stackoverflow)
FR (1) FR2145941A5 (enrdf_load_stackoverflow)
GB (1) GB1392646A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977265A (en) * 1975-06-02 1976-08-31 The Gates Rubber Company Positive drive belt system
US4086821A (en) * 1977-02-16 1978-05-02 Dravo Corporation Drive assembly for the rotor of a solvent extractor
US4402240A (en) * 1980-12-29 1983-09-06 Carrier Corporation Heat exchanger ribbon slitting device and method
US20160186840A1 (en) * 2013-07-29 2016-06-30 Dayco Europe S.R.L. Transmission system comprising an oil wet toothed belt
US20230313862A1 (en) * 2020-08-25 2023-10-05 Jmj Synergia Spolka Z Ograniczona Odpowiedzialnoscia Mechanical system with double-sided chain

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5238934A (en) * 1975-09-23 1977-03-25 Canon Inc Cine camera able to record simultaneously
DE4309642B4 (de) * 1993-03-25 2004-03-25 Schuler Pressen Gmbh & Co. Kg Umsetzeinrichtung für den Werkstücktransport
DE19505212B4 (de) * 1995-02-16 2005-02-24 Applied Films Gmbh & Co. Kg Traversiereinrichtung für Meßkopfpaar
DE19941833B4 (de) * 1999-09-02 2005-02-24 Hell Gravure Systems Gmbh Riemenantrieb zur Erzeugung einer gleichförmigen Drehbewegung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238802A (en) * 1963-12-18 1966-03-08 Boleslaw L Budzyn Constant length chain adjustable roller drive
US3400540A (en) * 1966-06-08 1968-09-10 Rolls Royce Jet nozzle chain drive and mounting means therefor
US3588906A (en) * 1968-10-18 1971-06-28 Mead Corp Image construction system with clocked information input

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1423028A (en) * 1918-07-13 1922-07-18 Roth Ernest Driving means for tanning drums
US1746178A (en) * 1927-12-17 1930-02-04 Alexander M Alexandrescu Gear
JPS426406Y1 (enrdf_load_stackoverflow) * 1964-07-17 1967-03-28

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238802A (en) * 1963-12-18 1966-03-08 Boleslaw L Budzyn Constant length chain adjustable roller drive
US3400540A (en) * 1966-06-08 1968-09-10 Rolls Royce Jet nozzle chain drive and mounting means therefor
US3588906A (en) * 1968-10-18 1971-06-28 Mead Corp Image construction system with clocked information input

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977265A (en) * 1975-06-02 1976-08-31 The Gates Rubber Company Positive drive belt system
US4086821A (en) * 1977-02-16 1978-05-02 Dravo Corporation Drive assembly for the rotor of a solvent extractor
US4402240A (en) * 1980-12-29 1983-09-06 Carrier Corporation Heat exchanger ribbon slitting device and method
US20160186840A1 (en) * 2013-07-29 2016-06-30 Dayco Europe S.R.L. Transmission system comprising an oil wet toothed belt
US9945455B2 (en) * 2013-07-29 2018-04-17 Dayco Europe S.R.L. Transmission system comprising an oil wet toothed belt
US20230313862A1 (en) * 2020-08-25 2023-10-05 Jmj Synergia Spolka Z Ograniczona Odpowiedzialnoscia Mechanical system with double-sided chain
US12066078B2 (en) * 2020-08-25 2024-08-20 Jmj Synergia Sp. Z O.O. Mechanical system with double-sided chain

Also Published As

Publication number Publication date
DE2232674C2 (de) 1983-09-08
FR2145941A5 (enrdf_load_stackoverflow) 1973-02-23
CA972985A (en) 1975-08-19
JPS5622706B1 (enrdf_load_stackoverflow) 1981-05-27
DE2232674A1 (de) 1973-02-08
CH566499A5 (enrdf_load_stackoverflow) 1975-09-15
GB1392646A (en) 1975-04-30

Similar Documents

Publication Publication Date Title
US3730011A (en) Precision drive for printing cylinder
US4112469A (en) Jet drop copying apparatus
DE2631850C2 (de) Verfahren sowie Vorrichtung zum zeilenweisen Belichten punktförmiger Flächenelemente eines lichtempfindlichen Aufzeichnungsträgers
EP0239339A2 (en) Apparatus for producing fibrous structures electrostatically
CN1097501C (zh) 带状材料的开孔装置
US4596990A (en) Multi-jet single head ink jet printer
US3560988A (en) High speed precision placement of liquid drops
US2884881A (en) Pile height control apparatus
ZA202404675B (en) Device for the manufacture of an unconsolidated textile elongate member
US3493455A (en) Continuous web reinforcing machine
US3585097A (en) Expandable drum and heat sealing means
US3228616A (en) Apparatus for changing a helical winding angle
DE1585198B2 (de) Fadenliefervorrichtung an mehrsystemigen rundstrickmaschinen
US4249981A (en) Device for forming a web of parallel threads
US3491964A (en) Driving arrangements for material advancing rollers
US3235934A (en) Oscillatory napping apparatus
US3547430A (en) Folder beater brush for collator for zigzag folder
US3327596A (en) Method and apparatus for rotating and axially advancing tubular stock or the like
US4009656A (en) Cloth printer and method with feeder engaging warp threads
US2305904A (en) Feeding apparatus
US3984897A (en) Gilling machine
RU2132249C1 (ru) Устройство для очистки проволоки
US2553203A (en) Electrostatic sheet-perforating machine
US1536433A (en) Pipe-perforating machine
US1003178A (en) Tobacco-feeding device for cigarette-machines.

Legal Events

Date Code Title Description
AS Assignment

Owner name: EASTMAN KODAK COMPANY A NJ CORP.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MEAD CORPORATION THE A CORP. OF OH;REEL/FRAME:004237/0482

Effective date: 19831206