US3774533A - Rotary screen printing machine with internal squeegee - Google Patents

Rotary screen printing machine with internal squeegee Download PDF

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Publication number
US3774533A
US3774533A US00233038A US3774533DA US3774533A US 3774533 A US3774533 A US 3774533A US 00233038 A US00233038 A US 00233038A US 3774533D A US3774533D A US 3774533DA US 3774533 A US3774533 A US 3774533A
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screen
rotary screen
printing
gear
rotary
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Expired - Lifetime
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US00233038A
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English (en)
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S Ichinose
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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
    • B41F15/0831—Machines for printing webs
    • B41F15/0836—Machines for printing webs by means of cylindrical screens or screens in the form of endless belts

Definitions

  • This invention relatesto a rotary screen printing machine. More particularly, the invention relates to a rotary screen printing machine wherein the rotary screen rises from the printing operation position at the time of termination of the printing operation and at this raised position the rotary screen is driven and rotated independently of the printing belt, whereby the effluence of a printing paste or ink through'the screen can be effectively prevented at the time of stoppage of the printing operation.
  • a rotary screen printing machine of the type that has heretofore been used widely comprises pulleys provided on both sides 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 through said screen, and a drive mechanism for driving the rotary screen at a speed synchronized with the speed of the printing belt.
  • the color change, the design exchange and other operations are conducted after lowering of the printing belt from the printing operation position or raising of the rotary screen from the printing operation position, or without such lowering or rising of the printing belt or rotary screen.
  • the known rotary screen printing machine there is a great problem at the time of stoppage of the printing operation the printing paste or ink is flowing out onto the printing belt or the material to be printed which is supported on the printing belt and consequently causes contamination of the printing belt and the material to be printed no means capable of preventing effectively this efiluence of the printing ink from the screen has been found.
  • My invention further seeks to provide a rotary screen printing machine whereinwhen the rotary screen is at the printing operation position, the force for driving the rotary screen is transmitted by a first drive mechanism for driving the printing belt and the rotary screen at a synchronized speed, and when the rotary screen is at the position in which it has been lifted up from the printing operation position, the force for driving the rotary screen is transmitted by a second drive mechanism independent of the first drive mechanism, in each case the transmission of the force for driving the rotary screen being effected through an idle gear mounted on a supporting shaft for supporting the rotary screen for vertical movement, whereby the rotary screen can be driven and rotated either during the printing rotary screen-at a speed synchronized with the speed of the printing belt, wherein a bearing device for the rotary screen is mounted on a supporting member, one end of which is pivoted on a supporting shaft and the other end of which is attached to a lifting device, a screen gear fitted on the rotary screen is driven by a screenternatively with a first drive mechanism for driving the
  • FIGS. LA and 1-8 are side views illustrating the drive mechanisms of the rotary machine of this invention, FIG. A-l showing the positions of the parts during the printing operation and FIG. l-B showing the positions of the parts at the time of stoppage of the printing operation.
  • FIGS. Z-A and 2-8 are side views illustrating the arrangement of the lifting device of the rotary screen printing machine illustrated in FIGS. l-A and ll-B, FIG. 2-A showing the positions of the parts during the printing operation and FIG. Z-B showing the positions of the parts atthe time of stoppage of the printing operation.
  • P16. 3 is an enlarged partial side view illustrating the supporting mechanism of the bearing device in the rotary screen printing machine of this invention.
  • FIG. 4 is a top plan view illustrating the supporting mechanism of the bearing device shown in FIG. 3.
  • FIGS. l-A and 1-8 on opposite ends of a frame 1, namely at the ends of the printing operation zone, 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 2 and 3.
  • a drive shaft 3 on which the drive pulley 2 is fixed has a sprocket or pulley 6 mounted thereon, and the driving force supplied by 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 onto the upper surface of the printing belt 4, and supported and transported to the printing operation zone 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 is in contact with the printing belt 4 travelling in the idle pulley 3, and the material 10 to be printed is fed between the press roller 11 and the printing belt 4 by a guide roller 12 mounted upstream of the press roller 11.
  • one or a plurality of rotary screens 14 are disposed, in the interior of which a squeegee member 15 is provided for squeezing a printing ink or paste onto the material 10 to be printed through said screen.
  • the rotary screen 14 contacts with the material 10 to be printed, which is supported on the printing belt 4, and is driven at a speed synchronized with the travelling speed of the printing belt 4.
  • an image of a pattern corresponding to that on the rotary screen 14 is printed and fonned on the material 10 to be printed.
  • their position and phase are so arranged that a desired pattern or combination of colors can be formed on the material 10 to be printed.
  • the prominent characteristic feature of this invention is that the bearing device for each rotary screen 14 is mounted on a supporting member, one end of which is pivoted on a supporting shaft and the other end of which is attached to a lifting device, the screen gear fitted on the rotary screen 14 is engaged with a screendriving gear through an idle gear fitted on the supporting shaft, and said screen-driving gear is connected alternatively with the first drive mechanism for driving the rotary screen 4 at a speed synchronized with the speed of the printing belt 4 and the second drive mechanism independent of the first drive mechanism.
  • a 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 lifting device 20.
  • the supporting shaft 18 is supported rotatably 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, also the rotary screen 14 can oscillate around the supporting shaft 18 as the center.
  • the lifting devices 20 are mounted on a lift frame 22, and an optional mechanism for vertically moving the lift frame 22 is mounted on the frame 1. As can be seen from FIGS.
  • racks 23 are provided on the lift frame 22 extending in the vertical direction, and pinions 24 are mounted rotatably at positions 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 arm 25 is oscillatably mounted on a silde shaft 26.
  • One end of the slide shaft 26 is attached to an am 28, one end of which is oscillatably fitted on a shaft 27.
  • the other end of the arm 28 is connected with a piston member 30 of a pressure cylinder 29.
  • the squeegee members 15 be supported by the lift frame 22. If such method of supporting the squeegee members 15 is adopted, the squeegee members 15 are shifted by a distance corresponding to the lifting distance (/1 of the lift 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 fitted on the corresponding supporting shaft 18.
  • a shaft 33A is mounted on each lifting 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.
  • a screen-driving gear 34 is provided below the idle gear 32 fitted on each supporting shaft 18, so that it is engaged with said idle gear 32.
  • a helical worm gear 35 is fixed to each screen-driving gear 34, and is meshed with a helical gear 37 attached to a screendriving shaft 36 extending in the longitudinal direction of the frame 1.
  • the screen-driving gears 34 are driven through the engagement between the helical gears 37 and the helical worm gears 35, and the drive force of the screendriving gears 34 is conveyed to the screen gears 31 through the idle gears 32, whereby the rotary screens 14 can be driven and rotated smoothly irrespective. of the position of the screens 14.
  • One end of the screen-driving shaft 36 is connected via a magnetic clutch or other known clutch M1 to a first drive mechanism, and the other end of the shaft 36 is connected via a magnetic clutch or other known clutch M2 to a second drive mechanism.
  • Any mechanism capable of driving the rotary screens 14 at a speed synchronized with the speed of the printing belt 4 may be used 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 spur drive gear 39 is fixed on the shaft 38 on which the idle pulley 3 is fixed, an idle gear 40 is mounted so that it is engaged with the drive spur gear 39, and an exchangeable change gear 41 is mounted so that it is engaged with the idle gear 40.
  • a bevel gear (not shown) is fixedto 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.
  • a spur gear 46 which is engaged with a spur gear 47 mounted freely movably on the screen-driving shaft 36.
  • the spur gear 47 fitted on the shaft 36 and the magnetic or other known clutch M1 attached to the shaft 36 are so arranged that when the clutch M1 is actuated, the shaft 36 is driven and rotated by the drive force conveyed to the spur gear 47 and when the clutch M1 'is not actuated, the spur gear 47 and the screen-driving shaft 36 are rotated independently of each other. Thus, when the clutch M1 is actu-.
  • the change of the diameter of the rotary screens 14, i.e., 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 38 in engagement with the drive spur gear 39, so that a change gear 41 suitable for attaining a screen synchronized with the speed of the printing belt can be readily attached.
  • FIGS. 1-A and 1-B to the other end of the screendriving shaft 36 is connected a motor 45 equipped with a reduction gear for driving and rotating the rotary screen independently through the magnetic or other known clutch M2.
  • a motor 45 equipped with a reduction gear for driving and rotating the rotary screen independently through the magnetic or other known clutch M2.
  • the screen-driving shaft 36 is driven and rotated by the motor 48 equipped with a reduction gear, and the rotary screens 14 are then driven and rotated by means of the gearing mechanism comprising members 37, 35, 34, 32 and 31.
  • the printing operation with use of the printing machine of this invention is conducted in the following manner.
  • the first clutch M1 is actuated and the second clutch M2 is not actuated.
  • the drive motor M By operation of the drive motor M, the drive pulley 2 is driven and rotated, and with the rotation of the pulley 2, the endless belt 4 for printing is driven.
  • the material 10 to be printed passes over guide rollers 12 and is fed between a pressure roller 11 and the printing belt 4 travelling on an idle pulley 3.
  • the material 10 is fed onto the upper surface of the printing belt 4 and continuously forwarded to the printing operation zone.
  • the drive shaft 45 is driven and rotated, which results in rotation of the rotary screens 14 at a speed synchronized with the speed of the printing belt 4.
  • the lift frame 22 is in the lowermost position as illustrated in FIG. 2-A and the rotary screens 14 contact the material 10 on the printing belt 4.
  • the squeegee member 15 contacts the inner surface of each rotary screen 14 and it causes a printing ink or paste fed into the interior of the rotary screen 14 to ooze out through the screen onto the material 10 to be printed which is on the printing belt 4.
  • the printing of the material 10 is accomplished.
  • the material 10 which has been printed is separated from the printing belt 4 on the discharge side 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 the rotary screens 14 at the position illustrated in FIGS. l-A and 2-A. In order to prevent wear of the rotary screens 14 at the time of initiation of the printing operation, however, it is preferred to initiate the operation by maintaining the rotary screens 14 at the position illustrated in FIGS. 1-8 and 2-B and lowering the rotary screens 14 coincidentally with initiation of driving of the printing belt 4.
  • the rotary screen 14 is lifted from the printing operation position (shown in FIGS. l-A and 2-A) to the raised position shown in FIGS. 1-8 and 2-B, and at this risen position the rotary screen 14 can be driven and rotated independently of the printing belt 4, whereby an undesired phenomenon that at the time of stoppage of the printing operation the printing paste or ink flows out through the screen onto the material to the printed or the printing belt can be effectively prevented.
  • a rotary screen printing machine comprising pulleys at opposite ends of a 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 through the printing operation zone, at least one rotary screen positioned above said belt in said printing operation zone, a squeegee member in the interior of said rotary screen for squeezing a printing paste or ink through the rotary screen onto the material to be printed, a first drive mechanism for driving the rotary screen at a speed synchronized with the speed of the printing belt, a bearing device on which the rotary screen is rotatably mounted, a supporting member on which said bearing device is mounted a supporting shaft on which one end of said supporting member is pivotally mounted, a lifting device to which the other end of said supporting member is attached, a screen gear on the rotary screen, an idle gear on said supporting shaft engaged with said screen gear, a screen driving gear engaged with said idle gear,
  • a second drive mechanism independent of said first drive mechanism, and means alternatively connecting said screen driving gear with said first drive mechanism and said second drive mechanism, whereby when the printing operation is stopped, the rotary screen can be raised from the printing operation position by said lifting device and in the raised position the rotary screen can be driven and rotated independently of the printing belt.
  • a rotary screen printing machine as claimed in claim 1 wherein said lastmentioned means comprises a screen driving shaft, a gearing mechanism coupled between said screen driving shaft and said screen driving gear, and means at the ends of said screen driving shaft for coupling said screen driving shaft to said first and second drive means, respectively.
  • a rotary screen printing mechanism as claimed in claim 2 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 and 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 1 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 firstmentioned 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 5 in which said squeegee member is mounted on said lift 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 1 in which there are a plurality of rotary screens each having an associated squeegee member, bearing device, supporting member, lifting device screen gear,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
US00233038A 1971-12-15 1972-03-09 Rotary screen printing machine with internal squeegee Expired - Lifetime US3774533A (en)

Applications Claiming Priority (1)

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JP46101042A JPS4864287A (enrdf_load_stackoverflow) 1971-12-15 1971-12-15

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834307A (en) * 1971-09-06 1974-09-10 P Zimmer Rotary screen interrupter with squeegee lift means
US3834309A (en) * 1971-09-06 1974-09-10 P Zimmer Rotary screen printer with programmable screen interrupt
US3889595A (en) * 1972-07-03 1975-06-17 Precision Screen Machines Continuous rotary screen printing method and apparatus
US3918362A (en) * 1973-10-11 1975-11-11 Morrison Machine Co Pivotal rotary screen support and continuous drive therefor
US3919973A (en) * 1973-03-30 1975-11-18 Johannes Zimmer Squeegee device for applying liquid or viscous material to a web
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
US3926111A (en) * 1972-09-28 1975-12-16 Walter Bohm Printing machine
US3974766A (en) * 1973-09-10 1976-08-17 Peter Zimmer Process for imprinting spaced-apart web sections with a composite pattern
US3978787A (en) * 1973-10-11 1976-09-07 Morrison Machine Co. Drive means for cylindrical screen printer
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
US3998156A (en) * 1972-09-08 1976-12-21 Peter Zimmer Rotary screen registration system
US4957044A (en) * 1989-06-19 1990-09-18 Cronin John V Double sided screener for printed circuit boards
US5265531A (en) * 1991-08-27 1993-11-30 John Cronin Reciprocally shuttled double sided screener with tiltable print squeegee

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 (14)

* 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
US3834307A (en) * 1971-09-06 1974-09-10 P Zimmer Rotary screen interrupter with squeegee lift means
US3921519A (en) * 1971-11-15 1975-11-25 Peter Zimmer Rotary printing machine
US3889595A (en) * 1972-07-03 1975-06-17 Precision Screen Machines Continuous rotary screen printing method and apparatus
US3998156A (en) * 1972-09-08 1976-12-21 Peter Zimmer Rotary screen registration system
US3926111A (en) * 1972-09-28 1975-12-16 Walter Bohm Printing machine
US3919973A (en) * 1973-03-30 1975-11-18 Johannes Zimmer Squeegee device for applying liquid or viscous material to a web
US3974766A (en) * 1973-09-10 1976-08-17 Peter Zimmer Process for imprinting spaced-apart web sections with a composite pattern
US3918362A (en) * 1973-10-11 1975-11-11 Morrison Machine Co Pivotal rotary screen support and continuous drive therefor
US3978787A (en) * 1973-10-11 1976-09-07 Morrison Machine Co. Drive means for cylindrical screen printer
US4957044A (en) * 1989-06-19 1990-09-18 Cronin John V Double sided screener for printed circuit boards
US5265531A (en) * 1991-08-27 1993-11-30 John Cronin Reciprocally shuttled double sided screener with tiltable print squeegee

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Publication number Publication date
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