US3460470A - Process and apparatus for multicolor screen printing - Google Patents

Process and apparatus for multicolor screen printing Download PDF

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Publication number
US3460470A
US3460470A US499549A US3460470DA US3460470A US 3460470 A US3460470 A US 3460470A US 499549 A US499549 A US 499549A US 3460470D A US3460470D A US 3460470DA US 3460470 A US3460470 A US 3460470A
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Prior art keywords
printing
screen
stencil
spacing
ink
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US499549A
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English (en)
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Melvin E Green
Charles H Derrickson
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Advance Process Supply Co
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Advance Process Supply Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • 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
    • B41F15/0845—Machines for printing webs with flat screens
    • 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
    • B41F15/0845—Machines for printing webs with flat screens
    • B41F15/085—Machines for printing webs with flat screens with a stationary screen and a moving squeegee

Definitions

  • FIG 8 I4 BY y? Au 12,1969 MEGREEN mL 3,460,470
  • a method and apparatus for multicolor screen process printing includes feed means for moving a flat printing stock successively through a plurality of printing stations.
  • a plurality of printing stations are arranged for screen process printing of different colors in preselected designs.
  • the second printing station and any stations subsequent thereto each include a screen printing stencil provided with a second spacing screen arranged to prevent contact of the printing stencil with wet ink on the printed stock applied at the previous printing station.
  • the feed means for moving the flat printing stock is cooperable with registration means such as registration pins engageable with a gripper bar on the feed means, to register the stock accurately in relation to each printing station, thus providing for multicolor printing without offset printing from the second and subsequent spacing screen-s.
  • the spacing screen is in the form of an elongated belt of coarse mesh screen material which is periodically indexed to expose clean screen mesh for spacing. The spacing screen is continuously moved and washed and then returned to the spacing position.
  • This invention relates to new and useful improvements in screen process printing and more particularly to a method and/or apparatus for screen printing a plurality of colors on an object without waiting for individual colors to dry before the next pattern of color is applied.
  • screen process printing has been used in both single color and multicolor printing operations. Where a single color printing operation is undertaken, there is no particular problem since the printed object is merely stored on a suitable drying rack until the ink or other coating material has dried.
  • multicolor printing has been carried out using screen process equipment, it has been necessary to print one pattern of color on the object being printed, allow said pattern to dry, and then screen printing another color pattern onto the object to produce the desired combination of colors.
  • the screen process printing of objects which required an intermediate drying step has been highly ineffective since it is very slow and requires an excessive storage capacity for the printed objects between the various printing stages.
  • Another object of this invention is to provide a new and improved apparatus for multicolor screen process printing which does not require intermediate drying of the separate applications of colored patterns.
  • a feature of this invention is the provision of a new and improved process for screen process printing in which an object to be printed is printed in separate color patterns using a plurality of stencil screens wherein each screen subsequent to the first screen stencil is provided with a spacing screen having a mesh and filament size such that the printing screen is not contacted by the ink from the previous printing stage.
  • Another feature of this invention is the provision of a new and improved apparatus for multicolor screen process printing in which an object to be printed is continuously and intermittently moved from one station to another and is printed with a plurality of color patterns at each of the printing stations, each printing station subsequent to the first being provided with a spacing screen having a mesh size and filament size such that the ink from the previously printed areas will not touch the surface of the screen stencil at that printing station.
  • FIG. 1 is a plan view of a screen stencil for impressing a color pattern on a printed object
  • FIG. 2 is a plan view of a second screen stencil for impressing a second color pattern on a printed object
  • FIG. 3 is a plan view of a third screen stencil for impressing a third color pattern on a printed object
  • FIG. 4 is a plan view of a printed object which has been printed using stencils shown in FIGS. 1, 2 and 3,
  • FIG. 5 is a View in section taken on the line 5--5 of FIG. 1,
  • FIG. 6 is a view in section taken on the line 6-6 of FIG. 2,
  • FIG. 7 is a sectional view taken on the line 7-7 of FIG. 3,
  • FIG. 8 is a detail plan view of the spacing screen shown in FIGS. 6 and 7,
  • FIG. 9 is a view in section of the screen shown in FIG. 8,
  • FIG. 10 is a view in elevation of an apparatus designed to carry out the process illustrated in FIGS. 1 to 9, inelusive,
  • FIG. 11 is a schemattic view, in perspective, of the feeding stage of the apparatus shown in FIG. 10,
  • FIG. 12 is a schematic view of a four-station printing station in the apparatus shown in FIG. 10,
  • FIG. 13 is a schematic view of a four-station printing apparatus utilizing the improved process of this invention.
  • FIG, 14 is a schematic view of the invention applied to a cylinder screen press
  • FIG. 15 is a schematic view of the invention utilizing a plurality of stencils at a single station
  • FIG. 16 is a schematic view of another embodiment of the invention in which the spacer screen is moved periodically to provide a clean spacer screen surface.
  • This invention comprises a new and improved method and apparatus for multicolor screen process printing.
  • the method can be carried out by hand operation or by a crude apparatus capable of performing the individual steps.
  • the invention comprises not only the process but the new and improved apparatus for carrying out the multicolor printing operation.
  • an object such as a fiat sheet of paper or other material
  • a stencil screen to impress a pre-selected pattern of color thereon.
  • the printed object is then moved to another printing station while the printing ink is still wet.
  • a second stencil is moved into very precise registration with the printed object so that a second ink pattern may be printed thereon before the ink from the first printing station has been allowed to dry.
  • the second printing station includes a stencil having a stencil screen and provided with a spacing screen interposed between the stencil screen and the printed object.
  • the spacing screen is preferably formed of materials to which the ink is nonadherent and having a thickness and mesh opening such that the ink from the first printed area will not touch the surface of the stencil screen at the second printing station.
  • the object is moved to a third or fourth printing station where a stencil is moved into accurate registration with the printed object.
  • the stencil at the third or fourth printing station is provided with a similar spacing screen which prevents the wet ink from the previous printing stations from contacting the surface of that stencil screen.
  • the ink adheres slightly to the spacing screen and builds up a layer after several printing operations, This difficulty can be avoided by use of an improved embodiment of the invention in which the spacing screen is moved periodically to present a clean spacing surface The portion of the spacing screen which was wet with ink is then washed and dried before it is again used for spacing the stencil.
  • FIG. 1 there is shown a stencil 1 comprising a frame 2 and stencil screen 3 having an open portion of preselected pattern 4.
  • Stencil 1 is provided with squeegee 5 and printing ink 6.
  • FIG. 5 which is a section taken on the line 55 of FIG. 1, the relationship of the stencil 1 to a flat sheet 7 which is bebeing printed is illustrated.
  • the stencil is placed against sheet 7 and squeegee 5 moves the ink 6 along the surface of screen 3 to impress a pattern through openings 4 onto the surface of sheet 7.
  • a screen stencil generally designated 8 which comprises a frame 9 and stencil screen 10.
  • the screen 10 is provided with an open portion of preselected pattern 11.
  • Stencil 8 is also provided with ink 12 which is of a different color from the ink in stencil 1 and is provided with squeegee 13.
  • Stencil 8 is also provided with a spacing screen 14 which prevents screen 10 from touching the wet ink on the surface of sheet 7. The details of this printing station are more clearly seen by reference to FIG, 6 which shows the relationship of screen 10 to spacing screen 14 and sheet 7.
  • the spacing screen 14, secured on frame 9 is placed against the sheet 7 with stencil screen 10 in precise, accurate registration with sheet 7 so that a second color may be printed on said sheet in precise registration with or overprinting the previously printed pattern.
  • squeegee 13 is operated to cause ink 12 to be forced through stencil 10 at the open mesh portion 11 to impress a second pattern on sheet 7 (in this case overprinting the background printing 4*).
  • stencil 8 and spacing screen 14 are lifted and sheet 7 is moved to another printing station while the ink from the previous printing stages is still wet.
  • Sheet 7 is moved to the printing station shown in FIGS. 3 and 7 of the drawing.
  • a screen stencil 15 comprising a frame 16 having a stencil screen 17 with an open mesh portion of preselected pattern 18 therein.
  • Stencil 15 is provided with ink 19 of a different color from that used with stencils 1 and 8 and is provided with squeegee 20 for application of the ink to sheet 7.
  • Stencil 15 is also provided with a spacing screen 21 as shown in section in FIG. 7.
  • spacing screen 21, secured in frame 16 is placed against sheet 7 with stencil screen 17 in precise accurate registration with the previously printed areas on said sheet. While the stencil is in such precise registration squeegee 20 is operated to force ink 19 through the open mesh portion 18 to print a third color pattern on the printed sheet.
  • sheet 7 is shown as a finished product with the separate printed areas sectioned thereon and the separate printed areas identified as 4 11 and 18 corresponding to the stencil openings through which the respective colors were forced.
  • Spacing screen 14 and 21 are identical and may be used in one or more additional printing stages if desired.
  • Printing screen 3 (or 10 or 17) is preferably formed of threads or filaments about 0.0014-0002 in. in diameter and having a mesh size of about 200 to 400 threads (or filaments) per inch.
  • Screen 14 consists of a woven network of monofilaments 22 of a material to which the printing ink is preferably nonadherent.
  • the filaments are preferably about 0.0014 to 0.013 inch in diameter and form mesh size of about 4 to 200 filaments per inch.
  • the size of the filaments and screen opening is selected such that the screen printing stencils are spaced a sufficient distance from the printed sheet to prevent the ink from the previously printed portion from touching the stencil screen.
  • a screen which is formed of monofilaments and that the spacing screen be of the aforementioned mesh size.
  • the ink used in the process be thixotropic.
  • Thixotropic inks which will lay down a thin printed layer e.g., 0.0004.004 in. wet thickness) are preferred.
  • the monofilaments in the screen are preferably of a material to which the thixotropic printing ink is nonadherent.
  • Suitable materials for the monofilaments 22 include stainless steel, nylon, polyesters (e.g., Mylar), or polytetrafluoroethylene (Teflon).
  • the spacing screens 14 and 21 are shown slightly spaced from the respective stencils 8 and 15. However, in actual commercial construction, the spacing screens 14 and 21 are aflixed tightly to the stencil frames 9 and 16 and are moved with stencils 8 and 15 into and out of printing engagement with sheet 7 (except in the embodiments of the apparatus where the spacing screen is movable to provide a clean surface periodically).
  • This process using thixotropic inks and printing stencils and spacing screens as described above, is quite versatile in commercial application. It is possible to print solid colors, line work, and half tones in a plurality of colors without waiting for the drying of each printing stage.
  • thixotropic inks which are laid down in thin layers, with printing stencils and spacing screens as described, makes possible the printing of successive colors over previously printed areas while still wet.
  • Accurate registration of successive stencils is desirable for optimum registration of colors in multicolor prints.
  • Accurate registration of the spacing screens in relation to previously printed areas is essential to prevent the spacing screen from printing a screen pattern offset in relation to the previously printed areas. In the embodiment using a movable spacing screen, accurate registration is not quite so essential since the spacing screen can be moved to provide a clean surface after each printing operation, if necessary.
  • the mesh size and filament diameter for the printing screens and spacing screens is selected according to the type of printing undertaken. Generally, printing of line work and solid areas can be done with coarser stencils and spacer screens than is required for halftone, fine line designs, type, etc.
  • FIG. 10 there is shown a view in elevation of the essential features of an apparatus for carrying out the process as above described.
  • the apparatus shown in FIG. 10 is a continuous screen process printer having two stations for printing sheet stock in two different colors. With obvious modifications, the apparatus can be adapted for printing in three or more colors.
  • the apparatus shown in FIG. 10 comprises a frame consisting of base 30 and vertically extending legs 31, 32, 33, 34 and 35. The upper ends of the vertically extending legs support frame 36. The left end of frame 36 constitutes a feed table.
  • the center portion of frame 36 includes flat table portions 37 and38 which are provided with a plurality of holes for application of a vacuum from a suitable vacuum source (not shown) for holding stock to be printed to prevent wrinkling or shifting during screen process printing at the respective stations.
  • Frame 36 supports a plurality of sprockets 39 over which there is fed a system of continuous chains 40 shown in dotted lines.
  • chains 40 are provided with a plurality of grippers shown in more detail in FIGS. 11 and 12.
  • Grippers include upper plate 42 and lower plate 41 provided with gripping members 141 and 142 which clamp printing stock 7 for movement through the apparatus.
  • the plates 41 and 42 are registered by pins 47.
  • the stock is initially located by front guide pins 143 and side guide pins 144.
  • Screen stencils 1 and 8 in FIG. 10 are the same as stencils 1 and 8 in FIGS. 1 and 2 and are arranged to carry out the function of those screens.
  • Screen stencil 1 in FIG. 10 is a plain stencil without a spacer screen as illustrated in FIGS.1 and 5.
  • Screen stencil 8 in FIG. 10 is provided with a spacer screen as shown in FIGS. 2 and 6 (which may be movable as shown in FIG. 16).
  • Frame 43 is provided with a set of pins 47 which register grippers 41, 42 by insertion into apertures therein for initial location of the feedstock being printed in the apparatus.
  • the apparatus is provided with a driving mechanism, which will be described in more detail, for moving the conveyor chain 40, opening and closing printing frames 43 and 44, and actuating the screen printing flood bar and squeegee.
  • Conveyor chain 40, and its driving mechanism, in association with the gripper structure constitutes :a means for feeding printing stock successively to first and second printing stations in the apparatus.
  • the conveyor chain 40 also functions to move an elongated spacing screen periodically with the operation of the apparatus.
  • Pins 47, 48 and 49 function as a means associated with the feeding means, i.e., the conveyor chain 40, to fix the position thereof by insertion of said pins into the afore mentioned apertures in the gripper members.
  • the apparatus is provided with motor 50 supported on the framework at 51.
  • Motor 50 is intermittently operated to operate said feeding means, i.e., conveyor chain 40, and also functions as an operating means to move the feeding means, the stencils, and the squeegees.
  • Motor 50 is operatively connected, as indicated. diagrammatically by the dotted line 52, to cam drive 5 3.
  • Cam 53 is arranged to operate through linkage 54 to actuate operating levers 55 and 56 connected by drive linkage 57.
  • Levers 55 and 56 operate levers 58 and 59 which are operatively connected at their upper ends, as indicated by lines 60 and 61 to squeegee and flood bars 62 and 63.
  • the lower end portion 64 of lever 58 is connected through drive linkage 65 to finger 66 on carriage 67.
  • Carriage 67 is supported on a pair of longitudinally extending rods 68 for reciprocal movement longitudinally of the apparatus.
  • Carriage 67 is provided with a pair of pusher pawls 69 which are arranged to engage grippers 41 on the under side of frame 36. Movement of carriage 67 toward the feed table engages pawls 69 with grippers 41 and indexes the chain 40 for movement of the grippers and stock from one printing station to the next.
  • Cam 53 is also arranged to actuate lever member 70 directly which is in turn connected through linkage 71 to lever 72.
  • Levers 70 and 72 are connected to members 73 and 74 on shafts 75 and 7 6 which define essentially a pair of bellcrank levers.
  • the outer end of lever portions 73 and 74 are connected to push rods 76 and 77 respectively which are arranged to move the printing frames 43 and 44 into and out of printing position.
  • a sheet of printing stock 7 is placed on the feed table portion of frame 36 and is secured to grippers 41, 42,
  • the movement of carriage 67 by cam 53 causes pawls 69 to engage grippers 41 on the under side of the frame 36 and to move the feed chain 40 the distance between successive printing stations, which coincides with the distance between the feed point and the first printing station.
  • printing stock 7 is moved to the first printing station and is held smoothly on vacuum table portion 37.
  • cam 53 actuates push rod 76 to lower frame 43 to printing position.
  • pusher 77 is actuated to lower frame 44 into printing position at the second printing station.
  • further movement of cam 53 actuates levers 58 and 59 to move squeegees 62 and 63 to force colored ink through the screen stencil to impress a preselected pattern on feedstock 7.
  • printing stock 7 is accurately located by pins 48 which register '7 with apertures in the gripper members 41 and 42 (see FIGS. and 12).
  • screen stencil 1 is used to stencil a first preselected pattern of color on printing stock 7. As shown in FIGS. 1 and 5, screen stencil 1 is a plain stencil without any spacer member.
  • feed chain 40 is actuated by reciprocally movable carriage 67 to index printing stock to the second printing station and to bring new printing stock to the first printing station.
  • frame 44 is pivoted into printing engagement with the printing stock 7. Printing stock 7 is accurately located with respect to printing frame 8 by pins 49 which register with apertures .in grippers 41, 42.
  • printing frame 8 is provided with spacer screen 14 which, in this case, is a screen of Teflon or nylon monofilaments.
  • the monofilaments in screen 14 have a diameter of the order of 0.0014 to 0.013 inch and a mesh of 4 to 200 filaments per inch.
  • spacer screen 14 which is carried on the printing frame, prevents the wet ink from the first printing operation from touching the undersurface of the screen in the second printing frame.
  • the use of monofila ments in the spacer screen prevents retention of occluded ink in the screen, while the use of Teflon, prevents retention of ink due to the substantial nonadherence of the ink on those materials.
  • Discharge belt 81 is operated either intermittently or continuously to discharge the printed stock from the apparatus.
  • the apparatus described in connection with FIG. 10 of the drawings includes only two printing stations. If a third printing station were desired, to carry out the three-step printing process shown in FIGS. 1 to 3 of the drawings, a third printing station would be added to the apparatus by appropriate extension of the supporting frame to provide an additional printing table and addition of a third pivoted printing frame to support screen stencil 15. Such frame would be operated by linkages connected to the operating linkages for the other printing frames.
  • FIG. 13 there is shown schematically an apparatus for four-stage multicolor printing.
  • the apparatus includes four printing stations comprising vacuum printing tables 101, 102, 103 and 104 with associated stencils 105, 106, 107 and 100.
  • Each of the stencils is provided a squeegee 109 and stencils 106, 107 and 108 are provided with spacer screens 110, 111 and 112.
  • Printing stock 113 is carried on feed belt 114 supported on drive rollers 115 and 116.
  • Drive rollers 115 and 116 are operated by a suitable drive mechanism coordinated in operation with the stencils for precise registration of the printing stock at each successive stencil.
  • FIG. 14 there is shown schematically an apparatus for three-stage multicolor printing using cylinder presses.
  • the apparatus comprises a conventional cylinder press modified to provide a plurality of printing stations without intermediate drying of printed stock and with each stencil subsequent to the first station provided with a spacing screen as used in the other embodiments of the invention.
  • the apparatus comprises a pair of feed chains 201 (similar to those used in FIG. 10) which pass over rotary cylinders 202, 203 and 204, and sprockets 205 and 206.
  • Cylinders 202, 203 and 204 are provided with stencils 207, 208 and 209, respectively. Each stencil is provided with a squeegee 210. Stencils 208 and 209 are provided with spacing screens 211 and 212.
  • a feed arrangement comprising cylinders 213 and 214 for driving feed belt 215.
  • Adjacent belt 215 there is provided a guide 216 for directing sheet feed stock 218 for engagement by grippers 217 (as in FIG, 10) on chains 201.
  • Cylinders 202, 203 and 204 are provided with recesses 219, 220, and 221 to receive grippers 217 when moving past the adjacent stencil.
  • this apparatus In operation, this apparatus functiOns as a conventional cylinder screen stencil for printing separate colors.
  • the spacing screens 211 and 212 permit printing of successive colors without intermediate drying of the stock.
  • the cylinders rotate and the stencils move as indicated by the directional arrows to print the stock at each station.
  • the ink, printing stencils, and spacing screens are as described for the other embodiments of the invention.
  • the stock is accurately registered in relation to the stencils at each station.
  • FIG. 15 the invention is shown schematically as applied to a fixed printing station.
  • Stock 302 is placed on table 301 having registration pins 303 and 304.
  • First stencil 303 and squeegee 307 are moved to print the stock 302 as indicated by the left hand dotted line.
  • stencil 305 is removed and stencil 306 and squeegee 307 moved into place (accurately registered by pins 303 and 304).
  • Stencil 306 is provided with spacing screen 308 which permits printing of successive colors without intermediate drying, as described for the other embodiments of the invention.
  • FIG. 16 there is illustrated schematically a modification of the invention in which the spacing screen is indexed and cleaned during operation of the apparatus.
  • Printing frame 120 corresponds to the printing frames in the other forms of the invention.
  • Printing frame 120 supports stencil frame 121 and movable spacing screen 119.
  • Stencil frame 121 has a stencil screen 122, as in the other embodiments of the invention, and a stenciling squeegee 123.
  • Printing frame 120 is pivoted on hinge 124 and is provided with 'a frame consisting of supporting members 125 and 126.
  • Supporting members 125 and 126 carry rollers 127, 128, and 129, and drive rollers 130 and 131.
  • the spacing screen 119 is supported on the support rollers and moved by drive rollers 130 and 131.
  • Adjacent to the printing frame (preferably fixed in position on the printing apparatus), there is a means to wash ink from the spacing screen comprising cleaning and drying apparatus for the spacing screen.
  • a means to wash ink from the spacing screen comprising cleaning and drying apparatus for the spacing screen.
  • the tank is also provided with rotary scrubbing brushes 140 for cleaning screen 119.
  • the spacing screen 119 passes adjacent to a dryer fan 141 after leaving cleaning bath 139.
  • this printing frame functions substantially the same as the other embodiments of the invention.
  • the spacing screen 119 is in the form of a continuous belt or loop. Screen 119 functions to space the stencil screen 122 from the wet ink on the printing stock. Periodically the screen 119 is indexed by drive rolls 130, 131 to expose clean screen between the stencil and the printing stock.
  • the movement of the screen may be after any desired number of printing operations. If desired, the screen can be indexed by the same drive mechanism which moves the stock from one printing station to the next. In such a case, the screen 119 would be indexed after each operation and the requirement of accurate registration with the previous printing on the stock is less important.
  • the spacing screen 119 As the spacing screen 119 is moved away from the stencil, it is moved into the cleaning solution 139 where brushes 140 remove ink from the filaments in the screen. After the screen leaves the cleaning bath, it passes dryer 141 where it is dried in preparation for further use.
  • a method of screen process printing in a plurality of colors which comprises:
  • said second stencil including a stencil screen and a spacing screen interposed between the stencil screen and the object being printed
  • said spacing screen being an elongated screen belt and formed of material to which the ink is relatively nonadherent and having a thickness and a mesh opening such that ink from the first printed area will not touch the surface of said second named stencil screen.
  • An apparatus for multicolor screen process printing comprising:
  • first and second screen stencil supporting means pivotally supported adjacent said first and second supporting means, respectively, and pivoted into and out of printing relation to said feeding means in coordination with movement of said feeding means
  • said second stencil including a frame, a stencil screen on said frame, and an elongated spacing screen belt on said frame positioned to protect the stencil screen from contact with wet ink on the printed stock applied by the first stencil,
  • (g) means to move said elongated spacing screen belt periodically to expose a clean spacer screen portion positioned between said stencil screen and the printing stock
  • An apparatus as defined in claim 5 which includes means for intermittently operating said feeding means, and said position fixing means comprises positioning pins engageable with said feeding means at each printing station.
  • feeding means comprising a gripper bar assembly operated by an intermittently operated conveyor and provided with a plurality of registration openings engaged by said positioning pins at each printing station.
  • An apparatus as defined in claim 5 which includes means to wash the ink from the screen after movement of the screen out of spacing position.
  • said spacer screen is comprised of monofilaments of nylon, polyester, polytetrafluoroethylene, or stainless steel.
  • An apparatus as defined in claim 5 which includes operating means to (a) move said feed means intermittently to position said printing stock successively at said printing stations,
  • An apparatus as defined in claim 5 which includes cleaning means to remove ink from the portion of said spacer screen moved out of registry with the screen stencil.
  • said cleaning means includes a cleaning tank, cleaning liquid, cleaning brushes, and a screen dryer, and said screen moving means moves the cleaned and dried portion of the spacer screen back into position between the screen stencil and printing stock.

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  • Mechanical Engineering (AREA)
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US499549A 1965-07-29 1965-10-21 Process and apparatus for multicolor screen printing Expired - Lifetime US3460470A (en)

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US4242957A (en) * 1977-07-19 1981-01-06 Reggiani S.P.A. Process and apparatus for the printing of sponge-cloths and the like
US4589335A (en) * 1982-01-19 1986-05-20 Ake Svantesson Stencil printing machine
US4590854A (en) * 1984-04-06 1986-05-27 Anderson Ronald C Screen printing method and apparatus
US4702165A (en) * 1984-04-06 1987-10-27 Anderson Ronald C Fluid pressure screen printing apparatus, holder and assembly
US4903592A (en) * 1987-04-02 1990-02-27 Svecia Silkscreen Maskiner Ab Silkscreen printing system for multicolor printing in a predetermined order of colors
US5094161A (en) * 1990-04-03 1992-03-10 Taylor Richard E Counter top multi-color single station printing method and apparatus
US5127321A (en) * 1990-05-22 1992-07-07 Silk Screen Technologies, Inc. Method and apparatus for pre-registration of multiple printing screens in a screen printing operation
US5613436A (en) * 1995-07-17 1997-03-25 Taylor; Richard E. Variable position pin registration plate for multicolor silk screen printing apparatus
WO2001083230A1 (de) * 2000-05-03 2001-11-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur verbesserung der druckqualität beim einsatz von druckschablonen
CN115447261A (zh) * 2022-08-11 2022-12-09 定南杰豪电路科技有限公司 一种线路板碳油丝印装置及工艺

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US4242957A (en) * 1977-07-19 1981-01-06 Reggiani S.P.A. Process and apparatus for the printing of sponge-cloths and the like
US4589335A (en) * 1982-01-19 1986-05-20 Ake Svantesson Stencil printing machine
US4590854A (en) * 1984-04-06 1986-05-27 Anderson Ronald C Screen printing method and apparatus
US4702165A (en) * 1984-04-06 1987-10-27 Anderson Ronald C Fluid pressure screen printing apparatus, holder and assembly
US4903592A (en) * 1987-04-02 1990-02-27 Svecia Silkscreen Maskiner Ab Silkscreen printing system for multicolor printing in a predetermined order of colors
US5094161A (en) * 1990-04-03 1992-03-10 Taylor Richard E Counter top multi-color single station printing method and apparatus
US5127321A (en) * 1990-05-22 1992-07-07 Silk Screen Technologies, Inc. Method and apparatus for pre-registration of multiple printing screens in a screen printing operation
US5613436A (en) * 1995-07-17 1997-03-25 Taylor; Richard E. Variable position pin registration plate for multicolor silk screen printing apparatus
WO2001083230A1 (de) * 2000-05-03 2001-11-08 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur verbesserung der druckqualität beim einsatz von druckschablonen
CN115447261A (zh) * 2022-08-11 2022-12-09 定南杰豪电路科技有限公司 一种线路板碳油丝印装置及工艺

Also Published As

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NL6610704A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-01-30
BE684196A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-12-16
GB1131571A (en) 1968-10-23
DE1571821A1 (de) 1970-08-20

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