US3774534A - Rotary screen printing machine - Google Patents

Rotary screen printing machine Download PDF

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Publication number
US3774534A
US3774534A US00233039A US3774534DA US3774534A US 3774534 A US3774534 A US 3774534A US 00233039 A US00233039 A US 00233039A US 3774534D A US3774534D A US 3774534DA US 3774534 A US3774534 A US 3774534A
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printing
screen
rotary
rotary screen
gear
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S Ichinose
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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

Definitions

  • ABSTRACT A rotary screen printing machine having a plurality of printing sections, wherein when a rotary screen of one printing section is at a position raised from the printing operation position, and the printing operation is conducted by a plurality of printing sections alternately, whereby time required for change of color or design or for washing of screens, Squeegees, etc. can be greatly minimized and the machine operation efficiency can be greatly increased.
  • the invention relates to a rotary printing machine having a plurality of printing sections, wherein when a rotary screen of one printing section is in the printing operation position, a rotary screen of another printing section is at a position raised from the printing operation position, and the printing operation is conducted by a plurality of printing sections alternately.
  • a rotary screen printing machine can attain a high productivity because of its specific mechanism in which high speed printing can be conducted continuously, and the rotary screen printing machine is advantageous over the roller printing machine in the printing that the print cost is low. Further, in therotary screen printing machine a color change or design change may be accomplished very easily. Accordingly, it may be said thatthe rotary screen printing machine is a very advantageous printing machine.
  • a rotary screen printing machine of the type that has heretofore been used broadly comprises pulleys provided at both ends of the printing operation zone, at least one of which is driven, a printing belt supported and driven by said pulleys, which is adapted for supporting a material to be printed and transporting it to the printing operation zone, a squeegee member mounted in the interior of the rotary screen for squeezing a printing paste or ink into the material to be printed through said screen, and a drive mechanism for driving the rotary screen at a speed synchronized with the speed of the printing belt.
  • Another object of this invention is to provide a rotary screen printing machine wherein a plurality of printing sections are provided in the printing operation zone so that when-a rotary screen of one printing section is in the printing operation position, a rotary screen of another printing section is in a position raised from the printing operation position, and the printing operation is conducted by a plurality of printing sections alternately.
  • a rotary screen printing machine comprising pulleys provided on both ends of the printing operation zone, at least one of which is driven, a printing belt supported and driven by said pulleys, which is adapted for supporting a material to be printed and transporting it to the printing operation zone, a squeegee member mounted in the interior of the rotary screen for squeezing a printing paste or ink onto the material to be printed, and a drive mechanism for driving the rotary screen at a speed synchronized with thespeed of the printing belt
  • said printing operation zone comprises a plurality of printing sections independent of each other, each of said printing sections comprising at least one rotary screen, a printing frame supporting said rotary screen and a lift mechanism for moving said printing frame vertically, said members being so arranged that when a rotary screen of of one printing section is in the printing operation position, a rotary screen of another printing section is raised from the printing operation position, and the preparation for printing and the printing operation are conducted by a plurality of
  • FIG. 1 is a side view illustrating the drive mechanism of the rotary screen printing machine of this invention.
  • FIG. 2 is a side view illustrating the lift mechanism of the rotary screen printing machine illustrated in FIG. 1.
  • FIG. 3 is an enlarged partial side view illustrating the supporting mechanism for the bearing device of the rotary screen printing machine of this invention.
  • FIG. 4 is a top plan view illustrating the supporting mechanism for the bearing device shown in FIG. 3.
  • FIG. 5 is a circuit diagram of the circuit for operating the printing machine.
  • FIGS. 1 and 2 on opposite ends of a frame 1, namely on the ends, and change zone A, B to zones A and B of the printing operation zone A, B, a drive pulley 2 and an idle pulley 3 are mounted, and a printing endless belt 4 is stretched between drive and idle pulleys 2 and 3, and supported and driven by these pulleys.
  • a drive shaft on which the drive pulley 2 is fixed is provided with a sprocket or pulley 6 mounted thereon, and the driving force of a motor M is transmitted to the drive pulley 2 by means of a chain 9 (or drive belt 9) extending between a drive sprocket 8 (or pulley 8) of a reduction gear 7 mounted on the motor M and said sprocket 6 (or pulley 6).
  • a material 10 to be printed such as a cloth or fabric, is fed on the upper surface of the printing belt 4, and supported and transported to the printing operation zones A and B by the printing belt 4.
  • the material 10' which has been printed is separated from the upper surface of the printing belt 4 above the drive pulley 2, following which the material 10' is forwarded to the drying or winding step.
  • a press roller 11 is provided so that it has a contact with the printing belt 4 travelling on the idle pulley 3, and the material 10 to be printed is fed between the press roller 1 l and the printing belt 4 over guide rollers 12 mounted upstream of the press roller 11.
  • each rotary screen 14 a squeegee member 15 is provided for squeezing a printing ink or paste onto the material to be printed through said screen.
  • the rotary screens '14 contact the material 10 to be printed, which is supported on the printing belt 4,
  • the prominent characteristic feature of this invention is that the printing operation zone has a plurality of printing sections A and B independent of each other and each printing section has at least one rotary screen, a printing frame supporting said rotary screen and a lift mechanism for moving said printing frame vertically.
  • each printing section has at least one rotary screen, a printing frame supporting said rotary screen and a lift mechanism for moving said printing frame vertically.
  • the printing operation can be conducted by a plurality of printing sections A and B alternately, and while one printing section is conducting the printing operation, washing of the screen or squeegee member or changing of the color or design can be effected in the other printing section.
  • FIGS. 1 and 2 two printing sections A and B are provided along the direction of travel of the printing belt 4.
  • a vertically movable printing frame 22 is provided as is illustrated in FIG. 2.
  • the bearing device for each rotary screen 14 be mounted on a supporting member, one end of which is pivoted on a supporting shaft and the other end of which is attached to the vertically movable printing frame 22, and that a screen gear attached to the rotary screen 14 be engaged with a screen-driving gear through an idle gear on said supporting shaft.
  • the bearing device 16 for each rotary screen 14 is mounted in a supporting member 21 pivoted at one end 17 on a supporting shaft 18, and the other end 19 is attached to a vertical member 20 on the printing frame 22.
  • the shaft 18 is supported rotatably mounted on the frame 1.
  • the supporting member 21 can oscillate around the supporting shaft 18 as the center, and with oscillation of the supporting member 21, the rotary screen 14 can also oscillate around the supporting shaft 18 as the center.
  • Each vertical member 20 projects above the printing frame 22, and a mechanism for vertically moving the printing frame 22 is mounted on the frame 1. As can be seen from FIG.
  • one embodiment of such a mechanism comprises racks on the printing frame 22 extending in the downwardly vertical direction, and pinions are rotatably engaged with the racks 23.
  • One end of an oscillating arm 25 is fixed to each pinion 24, and the other end of the oscillating arms 25 are oscillatably mounted on a slide shaft 26.
  • One end of the slide shaft 26 is attached to an arm 28, one end of which is oscillatably mounted on a shaft 27.
  • the other end of the arm 28 is connected with a piston member 30 of a pressure fluid cylinder 29.
  • a pressure fluid such as compressed air or oil
  • the pinion 24 is rotated in the counter-clockwise direction and the rack 23 is shifted upwardly, whereby the printing frame 22, and, in turn, the rotary screens 14 are raising up.
  • the lifting and lowering of the printing frame 22 and the rotatary screens 14 may be accomplished by employing a known hydraulic machine instead of the lifting and lowering mechanism shown in FIG. 2.
  • the squeegee members 15 be supported by the printing frame 22. If such method of supporting the squeegee members 15 is adopted, the squeegee members 15 are shifted a distance corresponding to the lifting distance (h,) of the printing frame 22, while the screens are lifted only a distance expressed by the following equation:
  • a screen gear 31 is attached to the end portion of each rotary screen 14, and the gear 31 is engaged with an idle gear 32 on the supporting shaft 18.
  • a shaft 33A is mounted on the vertical member 20, and on both ends of the shaft 33A there are mounted gears 33 so that the gears 33 are engaged with screen gears 31 mounted on both ends of the rotary screen 14.
  • the screen-driving gear 34 for each rotary screen is driven through the engagement between the helical gear 37 and the helical worm gear 35, and the drive force of the screen-driving gear 34 is conveyed to the screen gear 31 through the idle gear 32, whereby the rotary screens can be driven and rotated smoothly irrespective of the position of the screens 14.
  • the abovementioned drive system be alternatively connected to a first drive mechanism for driving the rotary screens 14 at a speed synchronized with'the speed of the printing belt 4 and a second drive mechanism independent of said first drive mechanism, whereby at the position raised from the printing operation position the rotary screens 14 can be driven and rotated independently of other known clutch M1 to the first drive mechanism,
  • the second drive mechanism is connected via a magnetic clutch or other known clutch M2 to the second drive mechanism.
  • Any mechanism capable of driving the rotary screens 14 at a speed synchronized with the speed of theprinting belt 4 may be utilized as the first drive mechanism.
  • the drive mechanism M for the drive pulley 2 driving the printing belt 4 may be utilized also as the first drive mechanism.
  • the idle pulley 3 of the printing belt 4 be used as the first drive mechanism for driving and rotating the rotary screens 14 at a speed synchronized with the speed of the printing belt 4.
  • a drive spur gear 39 is fixed on the shaft 38 on which the idle pulley 3 is fixed, an idle gear 40 is mounted to that it is engaged with the drive spur gear 39, and an exchangeable change gear 41 is mounted so that it is engagedwith the idle gear 40.
  • a bevel gear (not shown) is fixed to the change gear 41. From this bevel gear the drive force is transmitted through a bevel gear 42, another bevel gear 43 connected to the bevel gear 42, and still another bevel gear 44 to a drive shaft 45, one end of which is fixed to the bevel gear 44.
  • the gears 47 fitted on the screen-driving shafts 36 and the magnetic or other known clutches Ml attached to the shafts 36 are arranged so that when a clutch M1 is actuated, the corresponding shaft 36 is driven and rotated by the drive force conveyed to the corresponding gear 47 and when a clutch M1 is not actuated, the corresponding spur gear 47 and the screen-driving shaft 36 can be rotated freely from the other shaft 36 and gear 47.
  • the change of the design size may be accomplished easily by exchanging the change gear 41. It is preferred that the idle pulley 40 be mounted oscillatably around the shaft 33 yet remain engaged with the drive spur gear 39, so that a change gear 41 suitable for attaining a speed synchronized with the speed of the printing belt can be readily attached.
  • the printing operation of the printing machine of this invention is conducted in the following manners.
  • the printing frame B22 of the printing section B is at the lowermost position, namely at the printing operation position, while the printing frame A22 of the printing section A is at a position raised from the operation position, namely at the stoppage position.
  • the printing operation is conducted.
  • the first clutch BM1 of the printing section B is acutated, while the second clutch BM2 is not actuated.
  • the first clutch AM1 of the printing section A is not actuated, while the second clutch AM2 is either actuated or not actuated.
  • the drive pulley 2 is driven and rotated by the drive motor M, and with the rotation of the drive pulley 2, the endless belt 4 for printing is driven, and a material 10 to be printed passes over guide rollers 12 and is fed between the pressure roller 11 and the printing belt 4 travelling on the idle pulley 3.
  • the material 111 is supplied to the upper surface of the printing belt 4 and continuously forwarded to the printing operation zone.
  • the drive shaft 45 With rotation of the idle pulley 3 caused by friction with the endless belt 4, the drive shaft 45 is driven and rotated. Since the clutch BMI is actuated and the clutch AMI is not actuated, only the screen-driving shaft B36 of the printing section B is driven and rotated, with the result that the rotary screens B14 of the printing section B are driven and rotated at a speed synchronized with the speed of the printing belt 4.
  • the rotary screens B14 of the printing section B contact the material 10 on the printing belt 4.
  • the squeegee member B has a contact the inner surface of each rotary screen B14, and causes a printing paste or ink fed to the interior of the rotary screen B14 to ooze out through the screen in the form of a pattern on the material 10 on the printing belt 4.
  • the printing of the material 10 is effectively performed in the printing section B.
  • the material 10' which has been printed upon is separated from the printing belt 4 on the discharge end of the printing belt 4, and is forwarded through a guide roller 13 to the subsequent treatment zone, for instance, the drying or winding zone.
  • the endless belt 4 for printing is subjected to such treatments as surface washing and drying, and comes to the position of the idle pulley 3, following which the above operation procedures are repeated.
  • Initiation of the printing operation may be effected while maintaining rotary screens 14 at the lower position such as that of the rotary screens B14 of the printing block B illustrated in FIGS. 1 and 2.
  • a fluid is introduced into the fluid cylinder B29, and the lift rack B23 and, in turn, the printing frame B22 are lifted.
  • the rotary screens B14 are rotated upwardly around the supporting shafts B18 and separate from the material 10 to be printed applied, which is applied on the printing belt 4.
  • the top end of the squeegee members B15 part from the inner surface of the screens B14.
  • the screendriving shaft B36 is driven and rotated by the motor B48 equipped with a reduction gear, and the rotary screens B14 are driven and rotated, independently of the printing belt 4, by the gearing mechanism comprising members 37, 35, 34, 32 and 31.
  • the gearing mechanism comprising members 37, 35, 34, 32 and 31.
  • the fluid cylinder A29 of the printing block A is so operated that the printing frame A22 and, in turn, the rotary screens A14 are lowered to the printing operation position.
  • actuation of the first clutch AMI of the printing section A and disengaging of the second clutch AM2 are effected, whereby the rotary screen A14 of the printing section A is driven and rotated at a speed synchronized with the travelling speed of the printing belt 4.
  • the printing operation is continued by the printing section A.
  • a paste-receiving saucer is inserted below each rotary screen B14 of the printing section B, and washing of the screen, squeegee and dyestuff pump of the section B and other operations necessary for the next printing operation are carried out.
  • the efficiency can be increased to about 93 percent in the rotary screen printing machine of this invention.
  • the printing operation may be perfonned also by using the printing sections A and B coincidentally.
  • actuation of fluid cylinders A29 and B29 and switchover of first clutches AMI and BMI and second clutches AM2 and BM2 are effected in a parallel manner.
  • Operation of each printing section is controlled by an electric circuit, for instance, as illustrated in FIG. 5.
  • symbol NFB designates a non-fuse circuit breaker
  • CS and SS designate change-over switches.
  • Symbols PB, CR, TR and RF designate a push button switch, a relay, a transformer and a rectifier, respectively.
  • Symbols RA, RB, Ra and Rh each designate a protective resistance.
  • MS and CL designate a magnetic switch and an overload relay, respectively.
  • SOL A and S01 B designate solenoid valves A and B for actuating a fluid cylinder.
  • Symbols AMI, BMl, AM2 and BM2 each to designate a magnetic clutch, and PM represents a pilot motor.
  • the screens A14 are driven in synchronism with the printing belt.
  • a push button switch PB4 is closed to complete in an exciting circuit for a relay CR8
  • the relay CR8 is actuated to open contact CR8 in a circuit SOL A and cause a fluid cylinder A29 to lower the printing frame A22.
  • the relay CR5 is actuated, and in turn, a magnetic clutch IBM! is also actuated.
  • the screens BM aredriven in synchronism with the printing belt.
  • Magneticclutches AMI and BMll, or solenoid valves SOL A and SOL B, may be actuated coincidentally, or they may be actuated separately.
  • tact CR7 are connected in parallel to the circuit for the magnetic switch MSA or the circuit for the magnetic switch MSB, only when the printing frame A22 is lifted and the magnetic clutch AM2 is actuated can the motor A48 be driven. Similarly, only when the printing frame B22 is lifted and the magnetic clutch BM2 is actuated can the motor B48 be driven.
  • the motor A48 and the motor Bd8 can be driven either separately or coincidentally.
  • a rotary screen printing machine comprising pulleys at opposite ends of the printing operation zone, at least one pulley being a driven pulley, a printing belt supported on and driven by said pulleys for supporting a material to be printed and transporting it to the printing operation zone, a plurality of rotary screens positioned above said belt in said printing operation zone, a squeegee member in the interior of each rotary screen for squeezing a printing paste or ink through the rotary screen onto the material to be printed, a first drive mechanism coupled to said rotary screens for driving the rotary screens at a speed synchronized with the speed of the printing belt, said machine having in said printing operation zone a plurality of printing sections independent of each other, each of said printing sections including at least one of said rotary screens, a printing frame supporting said rotary screen and a lift mechanism for moving said printing frame vertically and operable independently of the lift mechanisms for the other printing sections, whereby the rotary screen of one printing section can be in the printing operation position, and the rotary screen of
  • a rotary screen printing mechanism as claimed in claim 3 wherein the means for connecting the screen driving shaft to said first drive mechanism is a first clutch mechanism at one end of said screen driving shaft, and said means for connecting the screen driving shaft to the second drive mechanism is a second clutch mechanism, said first drive mechanism comprising a gearing mechanism coupled to one of said pulleys for said belt for transmitting the rotation of said pulley, and a drive shaft coupled between said gearing mechanism and said first clutch mechanism for transmitting the rotation of said drive shaft through the first clutch mechanism to said screen driving shaft.
  • a rotary screen printing machine as claimed in claim 2 in which said screen gear is on one end of said rotary screen, and said machine further comprises a further screen gear on the other end of said rotary screen, a shaft rotatably mounted on said lifting device, and first spur gear fixed on one end of said shaft and engaged with said first-mentioned screen gear, and a second spur gear on the other end of said shaft engaged with said further screen gear.
  • a rotary screen printing machine as claimed in claim 6 in which said squeegee member is mounted on said printing frame and positioned within said rotary screen so that when the rotary screen is in contact with the material to be printed the blade of said squeegee member is in contact with the inner surface of the rotary screen, and when the rotary screen is in the raised position, the blade of the squeegee member is spaced from the inner surface of the rotary screen.
  • a rotary screen printing machine as claimed in claim 2 in which there are a plurality of rotary screens in each printing section each having an associated squeegee member, bearing device, supporting member,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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US00233039A 1971-12-15 1972-03-09 Rotary screen printing machine Expired - Lifetime US3774534A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834309A (en) * 1971-09-06 1974-09-10 P Zimmer Rotary screen printer with programmable screen interrupt
US3921522A (en) * 1971-05-24 1975-11-25 Peter Zimmer Device for the printing of long repeat distance designs
US3941053A (en) * 1973-09-27 1976-03-02 James A. Black Printing press
US3965816A (en) * 1973-07-19 1976-06-29 Mitter & Co. Drive for rotary screen printer utilizing the roller squeegee
US3990363A (en) * 1970-10-07 1976-11-09 Stork Amsterdam N.V. Method and device for printing a web or a rectangular piece of material
US4114534A (en) * 1975-10-06 1978-09-19 Maschinenfabrik Peter Zimmer Aktiengesellschaft Control system for rotary printing screens
FR2409861A1 (fr) * 1977-11-26 1979-06-22 Toshin Kogyo Co Procede et dispositif d'impression serigraphique automatique
US4771690A (en) * 1987-04-24 1988-09-20 Ernst W. Dorn Company, Inc. Screen printing apparatus for limited flexibility stock
US4909143A (en) * 1987-10-09 1990-03-20 Stork Brabant B.V. Multicolor, rotary screen printing machine and a stepped variable gear drive from a machine of this type
US4957044A (en) * 1989-06-19 1990-09-18 Cronin John V Double sided screener for printed circuit boards
US5036759A (en) * 1989-11-02 1991-08-06 Gali Internacional, S.A. Installation for printing fabric pieces
GB2247862A (en) * 1990-08-24 1992-03-18 Riso Kagaku Corp Multicolour screen or stencil printing
US5265531A (en) * 1991-08-27 1993-11-30 John Cronin Reciprocally shuttled double sided screener with tiltable print squeegee
EP0805024A3 (de) * 1996-04-30 1998-01-14 Stork MBK GmbH Rotationssiebdruckmaschine zum Drucken grosser Bilder
CN104507684A (zh) * 2012-07-27 2015-04-08 富士机械制造株式会社 丝网印刷机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU266650A1 (enrdf_load_stackoverflow) *
US3291044A (en) * 1963-09-12 1966-12-13 Stork & Co Nv Screen printing machine with interchangeable cylinders
US3420167A (en) * 1967-01-10 1969-01-07 Stork & Co Nv Screen printing machine with driven screen
US3565002A (en) * 1967-02-13 1971-02-23 Walter Boehm Screen holder for rotary screen printing machines
US3572240A (en) * 1967-03-02 1971-03-23 Zimmer Peter Cylindrical printing screen supporting means in rotary screen printing machines
US3585930A (en) * 1967-09-27 1971-06-22 Walter Bohm Device on rotary screen printing machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU266650A1 (enrdf_load_stackoverflow) *
US3291044A (en) * 1963-09-12 1966-12-13 Stork & Co Nv Screen printing machine with interchangeable cylinders
US3420167A (en) * 1967-01-10 1969-01-07 Stork & Co Nv Screen printing machine with driven screen
US3565002A (en) * 1967-02-13 1971-02-23 Walter Boehm Screen holder for rotary screen printing machines
US3572240A (en) * 1967-03-02 1971-03-23 Zimmer Peter Cylindrical printing screen supporting means in rotary screen printing machines
US3585930A (en) * 1967-09-27 1971-06-22 Walter Bohm Device on rotary screen printing machines

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990363A (en) * 1970-10-07 1976-11-09 Stork Amsterdam N.V. Method and device for printing a web or a rectangular piece of material
US3921522A (en) * 1971-05-24 1975-11-25 Peter Zimmer Device for the printing of long repeat distance designs
US3834309A (en) * 1971-09-06 1974-09-10 P Zimmer Rotary screen printer with programmable screen interrupt
US3965816A (en) * 1973-07-19 1976-06-29 Mitter & Co. Drive for rotary screen printer utilizing the roller squeegee
US3941053A (en) * 1973-09-27 1976-03-02 James A. Black Printing press
US4114534A (en) * 1975-10-06 1978-09-19 Maschinenfabrik Peter Zimmer Aktiengesellschaft Control system for rotary printing screens
FR2409861A1 (fr) * 1977-11-26 1979-06-22 Toshin Kogyo Co Procede et dispositif d'impression serigraphique automatique
US4771690A (en) * 1987-04-24 1988-09-20 Ernst W. Dorn Company, Inc. Screen printing apparatus for limited flexibility stock
US4909143A (en) * 1987-10-09 1990-03-20 Stork Brabant B.V. Multicolor, rotary screen printing machine and a stepped variable gear drive from a machine of this type
US4957044A (en) * 1989-06-19 1990-09-18 Cronin John V Double sided screener for printed circuit boards
US5036759A (en) * 1989-11-02 1991-08-06 Gali Internacional, S.A. Installation for printing fabric pieces
GB2247862A (en) * 1990-08-24 1992-03-18 Riso Kagaku Corp Multicolour screen or stencil printing
US5265531A (en) * 1991-08-27 1993-11-30 John Cronin Reciprocally shuttled double sided screener with tiltable print squeegee
EP0805024A3 (de) * 1996-04-30 1998-01-14 Stork MBK GmbH Rotationssiebdruckmaschine zum Drucken grosser Bilder
CN104507684A (zh) * 2012-07-27 2015-04-08 富士机械制造株式会社 丝网印刷机
CN104507684B (zh) * 2012-07-27 2016-08-24 富士机械制造株式会社 丝网印刷机

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