US3834309A - Rotary screen printer with programmable screen interrupt - Google Patents

Rotary screen printer with programmable screen interrupt Download PDF

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Publication number
US3834309A
US3834309A US00286304A US28630472A US3834309A US 3834309 A US3834309 A US 3834309A US 00286304 A US00286304 A US 00286304A US 28630472 A US28630472 A US 28630472A US 3834309 A US3834309 A US 3834309A
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United States
Prior art keywords
rotary
drive shaft
screen
lifting
coupling
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Expired - Lifetime
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US00286304A
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English (en)
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P Zimmer
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/10—Machines for multicolour printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00—Printing machines of special types or for particular purposes
    • B41P2217/50—Printing presses for particular purposes
    • B41P2217/52—Printing presses for particular purposes for printing a long repeat length on webs

Definitions

  • a rotary screen printing machine has a plurality of individual rotary screens each having a lifting device.
  • a control element is connected to each of the lifting devices.
  • a drive is operatively connected to the control element to synchronize the rate of rotation of each of the rotary screens and the lifting thereof by the lifting devices.
  • Temporary lifting of rotary screens in rotary screen printing machines is known hitherto wherein rotary screens have been produced by rolling up flat screens in order to form a circular cylinder. By the lifting process the joint area unsuitable for printing has been brought out of contact with the sheet of material.
  • the object of the present invention is to provide a device enabling an alternate lifting and lowering of rotary screens when printing designs having patterns which are of relatively long overall length, such patterns being repeated by the rotary screens.
  • the length of the overall repeated pattern will be referred to as the long repeat distance.
  • the long repeat distance of the overall repeated pattern may be distributed over the circumferences of several rotary screens and, with multicolor printing, the individual rotary screens or groups of rotary screens may be brought into contact, according to the design, with the surface to be printed for the purpose of printing the overall repeated pattern.
  • this is achieved by the provision of a drive for the lifting devices of the individual rotary screen devices controlled by at least one drive shaft extending in the longitudinal direction of the machine, i.e. the direction of movement of the material.
  • the lifting devices may be devices known per se, e.g. crank gears, eccentrics, cam plates, or the like.
  • FIG. 1 is an arrangement of the device according to the invention on a rotary screen printing machine
  • FIG. 2 shows the lifting device of two screen devices
  • FIGS. 3a and 3b are screens with their gear drives in the lowered and lifted condition
  • FIG. 4 shows the lifting device on a screen device with an adjustment for the height of lift.
  • Rotary screens 1 of a plurality of printing devices in FIG. 1 are fixed to rotate in screen supports 2, which are designed to be lifted and lowered-with respect to the material to be printed.
  • the sheet of material 3 runs over a printers blanket in direction 4 through the printing machine and at the point 5 disconnects from the printers blanket and passes into a drier, not shown in the drawings.
  • Rotary screens 1 rotate in direction 6 during the passage of the sheet of material.
  • Rotary screens 1 are driven, as known per se, and their circumferential speed is kep synchronous with the speed of the sheet of material. This is accomplished by a rotary motion imparted to the shaft 8 from the front guide roller 7 (not driven) and is then supplied to the individual transmission devices 9.
  • the drive of the rear guide roller 10 is effected by motor 30.
  • the shaft 8 extends substantially through the total longitudinal length of the machine and joins a transmission 11 in order to rotate a driveshaft 12.
  • the capability exists in transmission 11 to bring about the necessary ratio of rate of revolutions by choosing any desired gear ratio of gears 13 of transmission 11.
  • a stepping mechanism 14 advantageously connected with drive shaft 12', which stepping mechanism receives one impulse for every revolution of drive shaft 12 and thereby transports a carrier of a predetermined program e.g'. a punched card or a perforated tape.
  • Such card or tape is thus moved step-by-step and closes and opens electrical circuits in a predetermined sequence. Electrical impulses from these electrical circuits are thus supplied, in such predetermined sequence dependent on the program on the card or tape to control elements such as shifting couplings 15 illustrated in FIG. 2, by means of the supply mains 16.
  • the different shifting couplings l5, e.g. electromagnetic clutches, thus selectively are closed or opened with each rotation of drive shaft-12.
  • Each coupling 15 may remain open during one or more rotations of the drive shaft 12 or may remain closed during one or more rotations of drive shaft 12.
  • Bevel gears 17 carrying marks 18 on the drive shaft. Bevel gears 17 are adjustable in their rotary position relative to drive shaft 12.
  • a ring 19 carries a zero mark 20 and is immovably connected with drive shaft 12.
  • Bevel gear 17 mates with a corresponding bevel gear 21 mounted on the shaft of shifting couplings 15. If shifting coupling 15 receives a closing impulse, the rotary motion of the drive shaft 12 is imparted to the pair of bevel gears 23 by means of shaft 22, and a crank arm 25 lifts the screen support 2 with the rotary screen by means of crossbar 26 and rams 27.
  • Rotary screen 1 thus may be lifted from the sheet of material 3 to be printed and the sheet of material then is not printed with the corresponding design in this area.
  • Shifting coupling 15, the gear on drive shaft 12, gear 21, shaft 22 and gears 23 form a coupling device means for transducing rotary movement of drive shaft 12 into lifting movement of the lifting device.
  • FIGS. 3a and 3b illustrate two difi'erent lifting steps of a rotary screen.
  • Rotary screen 1 is tightly connected with a gear 28 and mates with a corresponding gear, i.e. a drive wheel 29 associated with transmission device 9 and which causes screen 1 to rotate with the same circumferential speed as the other screens.
  • FIG. 3a rotary screen 1 is in contact with the sheet of material 3
  • FIG. 3b illustrates a lifted condition, there being a distance 37 between rotary screen 1 and sheet of material 3. It is useful to keep distance 37 smaller than the depth of teeth of the two gears 28, 29, so that engagement of the gears is ensured even in the fully lifted condition.
  • the rotary motion of the rotary screen 1 thereby is not interrupted upon lifting, although no immediate contact exists then with the sheet of material 3.
  • the adjusting device in FIG. 4 enables adjusting of the length of lift of the screen devices and therewith also of the area in which the printing process of a rotary screen is interrupted on the sheet of material 3. Adjusting screws 33 are provided for this purpose by means of which rams 27 may be shortened or extended. If the lifting device works by closing shifting couplings l5, crank arm 25 is put into motion, which crank arm lifts the two rams 27 in the sliding tubes 36 by means of crosspiece 26 until adjusting screws 33 are in contact with screen support 2. From this moment screen support 2 with the rotary screen positioned therein participates in the lifting movement, whereby the printing process is interrupted.
  • the device of FIG. 4 may be employed to control the amount of lift of arm 25 before causing an accompanying actual lift of the screen. This is advantageous in precisely controlling the timing of raising and lowering of the screen.
  • a rotary screen printing machine comprising:
  • each of said printing devices including a rotary cylinder screen
  • lifting device means connected to each of said printing devices for lifting said rotary screens thereof out of contact with said material
  • transmission means interconnected between said driving means and said drive shaft to impart rotation to said drive shaft
  • each of said coupling device means having an operative position connecting the respective lifting device means with said drive shaft and an inoperative position interrupting such connection;
  • said lifting device means each comprise a screen support means supporting the rotary screen of the respective printing device and a crank arm connected to said screen support means and to the respective coupling device means.
  • each of said coupling device means comprises a shifting coupling; first gear means positioned on said drive shaft; second gear means operatively attached to said shifting coupling and in meshing engagement with said first gear means; third gear means operatively attached to said shifting coupling; and fourth gear means carrying said crank arm and in meshing engagement with said third gear means.
  • each of said coupling device means comprises a shifting coupling
  • said means for selectively moving each of said coupling device means comprises a stepping mechanism and a carrier of a predetermined program, said carrier being stepped by said stepping mechanism at equal intervals dependent upon the angle of rotation of said drive shaft, said stepping mechanism delivering electrical impulses to each of said shifting couplings in a sequence dependent on said predetermined program and the stepped position of said carrier.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
US00286304A 1971-09-06 1972-09-05 Rotary screen printer with programmable screen interrupt Expired - Lifetime US3834309A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT772171A AT311290B (de) 1971-09-06 1971-09-06 Rotationsschablonendruckmaschine

Publications (1)

Publication Number Publication Date
US3834309A true US3834309A (en) 1974-09-10

Family

ID=3598834

Family Applications (1)

Application Number Title Priority Date Filing Date
US00286304A Expired - Lifetime US3834309A (en) 1971-09-06 1972-09-05 Rotary screen printer with programmable screen interrupt

Country Status (7)

Country Link
US (1) US3834309A (enrdf_load_stackoverflow)
AT (1) AT311290B (enrdf_load_stackoverflow)
CH (1) CH537281A (enrdf_load_stackoverflow)
FR (1) FR2152148A5 (enrdf_load_stackoverflow)
GB (1) GB1402113A (enrdf_load_stackoverflow)
IT (1) IT964322B (enrdf_load_stackoverflow)
NL (1) NL7211631A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921522A (en) * 1971-05-24 1975-11-25 Peter Zimmer Device for the printing of long repeat distance designs
US3921519A (en) * 1971-11-15 1975-11-25 Peter Zimmer Rotary printing machine
US3974766A (en) * 1973-09-10 1976-08-17 Peter Zimmer Process for imprinting spaced-apart web sections with a composite pattern
US4137841A (en) * 1976-04-12 1979-02-06 Fritz Buser Ag. Maschinenfabrik Low inertia screen interrupt mount
US4147103A (en) * 1975-12-10 1979-04-03 Champion Associated Weavers Limited Flat screen lift and interrupt means
US4621575A (en) * 1984-04-05 1986-11-11 Heidelberger Druckmaschinen Ag Printing unit of an offset rotary printing machine
US5441456A (en) * 1992-07-09 1995-08-15 Toyoda Gosei Co., Ltd. Press-formed pulley

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840073A (en) * 1926-11-19 1932-01-05 Edward J Henle Stencil printing mechanism
US2301379A (en) * 1941-04-16 1942-11-10 Willis G Davis Indexing or synchronizing apparatus
US2893310A (en) * 1954-08-11 1959-07-07 Johnson James Reid Roll moving means for rotary printing apparatus
US2925036A (en) * 1953-04-29 1960-02-16 Bird & Son Web feeding and printing mechanism for multiple unit roller type printing machine
US3139025A (en) * 1961-03-20 1964-06-30 Etudes De Machines Speciales Counter controlled rotary printer
US3304862A (en) * 1964-07-17 1967-02-21 Cranston Print Works Co Textile coloring apparatus with fluid motor interrupting means
US3456584A (en) * 1967-01-09 1969-07-22 Roto Print Machine Corp Cylinder adjusting means in rotary screen printing machine
US3541953A (en) * 1967-03-08 1970-11-24 De La Rue Thomas & Co Ltd Apparatus for production of printed web materials
US3552213A (en) * 1968-06-27 1971-01-05 Commissariat Energie Atomique Liquid metering wheel
DE2054570A1 (de) * 1969-11-07 1971-05-19 Elitex Zavody textilniho strojirenst vi generalm rzeditelstvi, Reichenberg (Tschechoslowakei) Vorrichtung zum Anpressen und Losen des Organs zum Auftragen von Far be auf Druckschablonen, insbesondere Rotationsdruckschabionen, in Maschinen zum Bedrucken von Textilien, Plastik folien, Papier und anderem Material
US3774533A (en) * 1971-12-15 1973-11-27 S Ichinose Rotary screen printing machine with internal squeegee
US3774534A (en) * 1971-12-15 1973-11-27 S Ichinose Rotary screen printing machine

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840073A (en) * 1926-11-19 1932-01-05 Edward J Henle Stencil printing mechanism
US2301379A (en) * 1941-04-16 1942-11-10 Willis G Davis Indexing or synchronizing apparatus
US2925036A (en) * 1953-04-29 1960-02-16 Bird & Son Web feeding and printing mechanism for multiple unit roller type printing machine
US2893310A (en) * 1954-08-11 1959-07-07 Johnson James Reid Roll moving means for rotary printing apparatus
US3139025A (en) * 1961-03-20 1964-06-30 Etudes De Machines Speciales Counter controlled rotary printer
US3304862A (en) * 1964-07-17 1967-02-21 Cranston Print Works Co Textile coloring apparatus with fluid motor interrupting means
US3456584A (en) * 1967-01-09 1969-07-22 Roto Print Machine Corp Cylinder adjusting means in rotary screen printing machine
US3541953A (en) * 1967-03-08 1970-11-24 De La Rue Thomas & Co Ltd Apparatus for production of printed web materials
US3552213A (en) * 1968-06-27 1971-01-05 Commissariat Energie Atomique Liquid metering wheel
DE2054570A1 (de) * 1969-11-07 1971-05-19 Elitex Zavody textilniho strojirenst vi generalm rzeditelstvi, Reichenberg (Tschechoslowakei) Vorrichtung zum Anpressen und Losen des Organs zum Auftragen von Far be auf Druckschablonen, insbesondere Rotationsdruckschabionen, in Maschinen zum Bedrucken von Textilien, Plastik folien, Papier und anderem Material
US3774533A (en) * 1971-12-15 1973-11-27 S Ichinose Rotary screen printing machine with internal squeegee
US3774534A (en) * 1971-12-15 1973-11-27 S Ichinose Rotary screen printing machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921522A (en) * 1971-05-24 1975-11-25 Peter Zimmer Device for the printing of long repeat distance designs
US3921519A (en) * 1971-11-15 1975-11-25 Peter Zimmer Rotary printing machine
US3974766A (en) * 1973-09-10 1976-08-17 Peter Zimmer Process for imprinting spaced-apart web sections with a composite pattern
US4147103A (en) * 1975-12-10 1979-04-03 Champion Associated Weavers Limited Flat screen lift and interrupt means
US4137841A (en) * 1976-04-12 1979-02-06 Fritz Buser Ag. Maschinenfabrik Low inertia screen interrupt mount
US4621575A (en) * 1984-04-05 1986-11-11 Heidelberger Druckmaschinen Ag Printing unit of an offset rotary printing machine
US5441456A (en) * 1992-07-09 1995-08-15 Toyoda Gosei Co., Ltd. Press-formed pulley

Also Published As

Publication number Publication date
DE2240377A1 (de) 1973-03-15
CH537281A (de) 1973-05-31
GB1402113A (en) 1975-08-06
IT964322B (it) 1974-01-21
DE2240377B2 (de) 1975-11-20
NL7211631A (enrdf_load_stackoverflow) 1973-03-08
AT311290B (de) 1973-11-12
FR2152148A5 (enrdf_load_stackoverflow) 1973-04-20

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