Abstract: Squeegee assembly, in particular intended for coating an substantially cylindrical object, such as metal, seamless screen printing cylinders, with a liquid or pasty material, at least comprising two substantially annular squeegees arranged at a distance from each other, between which squeegees material metering means open out for metering a material to be applied to the object to be coated; which squeegees can form part of a wall which is resilient, at least in places, of an annular squeegee pressure chamber, which is provided with pressure fluid supply means, while an annular material-supply chamber may be present in the squeegee pressure chamber which is provided with openings which open out between the squeegees, and also comprises a material supply which can be connected to a material source.

Abstract: This invention relates to a flood bar and squeegee for printing apparatus. In accordance with one aspect of the present invention, the flood bar or squeegee comprises an elongated member having an ink engaging face. A plurality of spaced apart fins are arranged across the face. The fins are generally parallel to one another and each end of the member is bent inwardly so as to inhibit the flow of ink to the sides of the screen.

Abstract: To the end of reliably and accurately detecting a failure to properly eject a master plate and positively preventing the occurrence of secondary failures due to a failure to properly eject a master plate, the passage of both the leading edge and the trailing edge of the ejected master plate beyond a prescribed point in the conveying path of ejected master plates is used as an indication of a successful ejection of a master plate.

Abstract: A printer system for printing a given pattern on a base board is described which includes a screen plate to be positioned above the base board. The screen plate has a perforated print pattern defined thereby. A printer proper is employed which includes an ink container chamber and an ink squeegeeing device. The ink squeegeeing device runs on the screen plate pressing the same against the baseboard while squeegeeing a given amount of viscous ink onto an upper surface of the screen plate. A cleaning device is employed for cleaning residual of ink left on an lower surface of the screen plate and an ink supplier is employed for feeding the ink container chamber of the printer proper with a fresh viscous ink when needed.

Abstract: A paper guide for a web-fed rotary printing press with multiple color printing groups on several vertically spaced levels provides a path for the freshly printed multiple color web to air dry as it travels along the machine frame. The length of travel of the air drying path is a multiple of the spacing between adjacent plate cylinders in any of the levels in the printing machine.

Abstract: In an applicator a thick coating of a liquid is applied to a flexible web that is then moved through a doctor assembly where excess liquid is scraped from the web. The doctor assembly has a generally stationary support at the station and a holder beam extending longitudinally substantially parallel to the web and transverse to a web travel direction. The beam is movable on the support transversely of itself and of the travel direction forward toward and backward away from the web and has a front face directed toward the web and an opposite back face turned away from the web. The support has front and back faces generally parallel to and respectively confronting the front and back faces of the holder beam. A doctor rod held in the holder beam is juxtaposable thereby with the web to scrape the excess liquid from the web. Front inflatable hoses are provided between the front faces of the holder beam and support and back inflatable hoses between the back faces of the holder beam and support.

Abstract: An improved squeegee holder for screen printing. A squeegee with a diamond or square shaped portion is clamped between two clamping plates inside V-shaped grooves in the clamping plates. Corner relief portions are provided within the clamping plates so that the corners not in use are not damaged. The clamping plates are aligned by two alignment pins and screwed together by a threaded rod with a handle. A spring surrounds each of the alignment pins urging the two clamping plates apart so that they separate when the screw handle is loosened.

Abstract: A reliable, small and light stencil duplicating machine comprises a printing section, a sheet feeding section, and a sheet discharging section. The printing section includes a printing drum for wrapping a stencil thereon, a press roller and parts associated with a printing process. The sheet feeding section feeds each printing sheet into a space between the printing drum and the press roller. A printed sheet is stripped off from the printing drum by a sheet separating member of the sheet discharging section, and is discharged onto a tray.

Abstract: The stencil printing device of the present invention comprises a mixing unit for receiving the first liquid from the first liquid storage container and the second liquid from the second liquid storage container, and producing printing ink by mixing the two liquids, a printing ink supply passage for conducting the printing ink produced by the mixing unit to an ink squeegee unit of a printing drum, ink amount sensor for detecting the amount of the printing ink in the ink squeegee unit, and ink supply control unit for controlling the amount of the printing ink that is supplied from the mixing unit to the ink squeegee unit according to the amount of printing ink detected by the ink amount sensor. Thus, a relatively large number of prints can be made with each bottle of printing ink so that the frequency of replacing the ink bottle may be reduced.

Abstract: A device for suspending a squeegee in a cylindrical screen of a rotary screen printing machine, in which the cylindrical screen is accommodated with both ends in drive and support units, and in which the squeegee extends in the lengthwise direction inside the cylindrical screen, comprises two squeegee supports, each disposed near one of the drive and support units, and each provided with an accommodation opening for the accommodation of one end of the squeegee. At the side facing the inside of the cylindrical screen, one of the squeegee supports is provided with a guide element for guiding an end of a squeegee into the accommodation opening when the squeegee is being mounted in the cylindrical screen.

Abstract: This invention relates to a flood bar and squeegee for printing apparatus. In accordance with one aspect of the present invention, the flood bar or squeegee comprises an elongated member having an ink engaging face. A plurality of spaced apart fins are arranged across the face. The fins are generally parallel to one another and each end of the member is bent inwardly so as to inhibit the flow of ink to the sides of the screen.

Abstract: A squeegee head includes a squeegee carried by a squeegee-holder carried by a support and whose inclination on the support is adjustable by rotation about a pivot axis parallel to the lengthwise direction of the squeegee. The squeegee-holder pivot axis is substantially coplanar with the free edge of the squeegee. The squeegee heads finds a specific application in silkscreen printing machines.

Abstract: In a squeegee device for supplying ink in a stencil printing device from the interior of a cylindrical, ink permeable printing drum which rotates around an axial line thereof with a stencil master plate wrapped around the outer circumferential surface thereof, to prevent a squeegee blade from developing a juddering movement relative to the cylindrical printing drum, and to allow the squeegee blade to sufficiently intimately contact the inner circumferential surface of the printing drum so that printing ink may be supplied to the printing drum by a prescribed amount in a stable fashion at all times, a thin spring plate is placed on a reverse surface of the squeegee blade made of a rubber-like elastic material which is in engagement with the inner circumferential surface of the cylindrical printing drum.

Abstract: Doctor blade and doctor blade device for the application of flowable substances on flat surfaces with a doctor blade profiled rod and a doctor blade element, a magnetic device is assigned to the doctor blade, the arrangement, shape, strength of the magnetic field produced by this device determines the local position of the doctor blade, and additionally through this magnetically determined position and fixation and through device parts, the angular position of the doctor blade is also adjusted, whereby the doctor blade has limited freedom of movement.

Abstract: An emulsion coater apparatus for filling a screen with emulsion is described. A head delivers pressurized emulsion onto and through holes in a screen. Squeegees located on either side of the screen are then drawn across the screen's surface so as to remove excess emulsion and fill any holes not filled by the high pressure head. The emulsion coater apparatus coats a screen in a single pass, thus making the coating process more efficient. Moreover, dispersing emulsion under pressure alleviates the need to degrease the screen, saving costs and minimizing environmental damage.

Abstract: Ink leakage from the trailing edge of the stencil master plate is avoided and a stable ink supply is ensured when using a D-type printing drum including a concentric cylindrical part extending over a major part of an entire circumference of the printing drum and defining an ink permeable region, a non-concentric cylindrical or planar part extending over a minor part of an entire circumference of the printing drum and having a central axial line different from that of the concentric cylindrical part, and an outer circumferential surface on which a stencil master plate is to be mounted without losing the benefit of reducing the displacement of the press roller.

Abstract: A squeegee device for applying a substance to a web of material, comprising lateral boundary plates for the squeegee slidably guided in a direction normal to the web, the boundary plates being provided with inserts of magnetizable material, which can be attracted by a magnet arranged beneath the web of material.

Abstract: A printer for printing a stencil image on a sheet is provided having a scraper which prevents ink from flowing axially outward beyond the ink supply roller. The scraper can be connected to a plate which supports the ink supply roller and preferably includes a portion extending toward and/or contacting the ink supply roller.

Abstract: A printer for printing out an image formed in a stencil on a sheet. The stencil formed with perforations representative of an image is wrapped around a drum which is made up of a hollow cylindrical support and a mesh screen covering the support. The cylindrical support has an apertured portion and a non-apertured portion and accommodates an inking roller therein for supplying ink to a sheet via the stencil. The sheet is pressed against the stencil by a press roller that faces the inking roller with the intermediary of the drum. The press roller is biassed by a cam having a profile such that the press roller contacts the drum before the sheet arrives between the press roller and the drum. The cam is also profiled such that the press roller gradually comes into contact with the drum to reduce oscillations between the press roller and the drum.

Abstract: The rotary screen printing apparatus is designed for ease of operation including adjustments and changes. A pivoting mounting frame mounts the print screen roll which may be easily withdrawn from one side of the roll by use of a bayonet fitting and removable bearing race and frame.

Abstract: In a stencil printing including the steps of supplying ink in the form of a layer on one side of a perforated stencil sheet, contacting another side of the stencil sheet to a surface for printing, applying a pressure to the ink layer by a pressing means so as to transfer the ink of the ink layer through perforations of the stencil sheet from the one side to the other side of the stencil sheet and to attach the ink thus transferred onto the surface for printing, and detaching the surface for printing from the other side of the stencil sheet, the improvement is which the surface for printing is detached from the other side of the stencil sheet at a portion thereof where a movement of the ink layer relative to the stencil sheet is substantially impeded by the pressing means so that a drawing out of the ink from the ink layer onto the surface for printing due to the adhesiveness and viscosity of the ink does not occur when the surface for printing is detached from the stencil sheet, thus also allowing the extrusi

Abstract: An apparatus and a process for printing, coating or dyeing of webs of material including an application element applying the substance to and magnetically pressed against the web or the stencil, the position of the element is manually set during experimental or short yardage production to the desired values and these values are maintained in the large-scale production, the application element is movably mounted on a support beam so that a distance and angular position with respect to the support beam are modified and controlled.

Abstract: A printer for printing out on image formed in a stencil on a sheet. The stencil formed with perforations representative of an image is wrapped around a drum which is made up of a hollow cylindrical support and a mesh screen covering the support. The cylindrical support has an apertured portion and a non-apertured portion and accommodates an inking roller therein for supplying ink to a sheet via the stencil. The sheet is pressed against the stencil by a press roller that faces the inking roller with the intermediary of the drum. A high friction member is located at a predetermined position on the non-apertured portion of the drum or a predetermined position on the mesh screen corresponding to a position where the press roller beings to press a sheet against the stencil.

Abstract: A mimeographic printing machine comprises a rotary cylindrical drum rotatable with a stencil supported thereon, an ink supply means for supplying ink to an inner circumferential surface of the cylindrical drum, a clamp disposed on an ink-impenetrable portion of the cylindrical drum for clamping an end of the stencil supported on the cylindrical drum, a stencil support disposed on the ink-impenetrable portion of the cylindrical drum, and peeling means disposed adjacent to the cylindrical drum. The stencil support resiliently contacts with the stencil clamped by the clamp. The peeling means approaches the cylindrical drum in timed relation with the rotation of the cylindrical drum, peeling a paper sheet after printed from the cylindrical drum.

Abstract: In an arrangement for the application of substances to a web of material (4), whereby a doctor blade (9, 13) is magnetically pressed against the material or a stencil (5) by means of a working magnet, and rests against a profiled ledge (6) in its operational position, it is proposed that in the profiled ledge (6) at least one restraining magnet (7) be provided, which keeps the doctor blade (9, 13) in rolling or sliding contact with the profiled ledge when the working magnet is switched off and raises it from the application surface (4, 5) or stencil.

Abstract: In a coating machine in which a doctor blade is magnetically applied, at least one strap or profiled section is tensioned longitudinally or transversely with a supporting surface for the conveyor belt or a substrate web. Between this strap or section and the magnet table on the one hand, and the conveyor belt and the substrate web, on the other hand, a relative movement is produced.

Abstract: Stencil duplicator comprising a stencil master plate processing unit for perforating a stencil master plate according to a desired print pattern, a printing drum unit including a rotary cylindrical printing drum for wrapping a processed stencil master plate therearound and retaining it thereon, and rollers for supplying ink from its inner circumferential surface and through said processed stencil master plate; a press roller unit for pressing a sheet of printing paper against an outer circumferential surface of said printing drum with said processed stencil master plate interposed therebetween.

Abstract: In a screen printing apparatus an applicator body is rotatable about its axis to selectively bring one of a plurality of medium supply ducts into active position so that it can deliver the color medium to the substrate. The applicator roller or blade and a strip defining the applicator compartment are provided on the rotatable body for each set of orifices and each distribution duct so that these elements need not be cleaned for color changeover since they remain associated with the color when the applicator is rotated.

Abstract: A doctor blade for use in an adhesive screen printing apparatus is formed of a main blade member of spring steel along with a U-shaped cap. The cap is ideally formed of a filled nylon material and is attached to the blade member with a silicon RTV compound. The use of this construction results in much more even laydown of adhesive from pattern to pattern and from the left and right hand sides of the screen. Use of the invention also serves to increase screen life.

Abstract: A mimeographic printing machine general comprises: a rotary plate cylinder for supporting a stencil on an outer circumferential surface thereof and having a perforation for passage of ink, the plate cylinder being rotatable with the stencil; means for supplying the ink to an inner circumferential surface of the plate cylinder; a squeegee movably received in the plate cylinder so as to come into and out of contact with the inner circumferential surface of the plate cylinder, the squeegee being operable to squeeze the ink from the supplying means toward the outer circumferential surface of the plate cylinder through the perforation of the plate cylinder; and a rod-shaped member rotatably received in the plate cylinder. The rod-shaped member is located behind the squeegee in the rotating direction of the plate cylinder and is movable with the squeegee for jointly holding the ink.

Abstract: A mimeographic printing machine comprises a rotary cylindrical drum having an ink-penetrable tubular wall for supporting a stencil on an outer circumferential surface thereof, and a device disposed outside the cylindrical drum for holding a paper sheet between the stencil on the outer circumferential surface of the cylindrical drum to perform printing. The ink-penetrable tubular wall of the cylindrical drum has an opening communicating with a hollow interior of the cylindrical drum, and an ink-impenetrable portion ahead of the opening in the rotating direction of the cylindrical drum, with a trailing end of the ink-impenetrable portion being inserted into the opening.

Abstract: A mimeographic printing machine comprises a cylindrical drum rotatable with a stencil supported thereon, a lower pusher roller located under the cylindrical drum coactive with the cylindrical drum to hold a paper sheet therebetween, an inside pusher roller movably received in the cylindrical drum for pushing the cylindrical drum toward the lower pusher roller, a drive gear drivable for rotation with the cylindrical drum, a support arm pivotally received in the cylindrical drum; an intermediate gear supported on the support arm and meshing with the drive gear, and an inside pusher gear mounted on the drive shaft of the inside pusher roller and meshing with the intermediate gear for pushing, with rotating, the inside pusher roller against the inner circumferential surface of the cylindrical drum.

Abstract: An assembly for holding a squeegee blade provides a levelness control of the squeegee blade and a pressure control on the squeegee blade. The assembly includes a wedge having a length approximately equal to that of the squeegee blade. The wedge also has a right triangle shape along its longitudinal axis. The wedge is positioned between an upper stationary body and the squeegee blade. There is also a pressure adjustment for moving the wedge in either direction along its longitudinal axis, such that the motion of the wedge produces pressure on the squeegee blade; thus, providing the pressure control. The leveling control is accomplished by a micrometer attached to a rigid plate. The micrometer being rotatable along its longitudinal axis. A gear, which is attached to the upper stationary body, is rotatable about a pivot point on the ridged plate by the rotation of the micrometer.

Abstract: The doctor device has a profile member pivotally mounted to a retaining member that is carried on a mount. Vertical movement of the mount causes angular displacement of the profile member thereby changing the material applicaton area disposed adjacent and upstream of the doctor. The doctor is either a doctor blade or roll doctor. In the case of a roll doctor, a receptacle is formed in the profile member and the roll doctor is magnetically retained with the receptacle. During application of a material to an application surface with the roll doctor, the roll doctor is magnetically attracted to the application surface by a second magnetic device located beneath the application surface or work surface.

Abstract: In a rotary stencil printer having a printing drum made of two annular members connected by a transverse bar member and a net member of woven, non-woven or knitted fibers of a rectangular shape in development wound around the two annular members with opposite side edge belt portions thereof being slidably laid on outer circumferential surfaces of the annular members so as to form a porous cylindrical body for mounting a stencil sheet as wound therearound, a back press roller of a diameter common with the printing drum disposed to face an outside surface of the printing drum so as to define a print sheet nip region with the printing drum therebetween and having a groove in an outside surface portion thereof adapted to receive the transverse bar member therein in meeting therewith in synchronized rotations of the printing drum and the back press roller in opposite directions, and an inner press roller disposed in an inside space of the printing drum so as to contact with an inside surface of the porous cylindri

Abstract: A device for cleaning cylindrical stencils comprising two pivoted, cylindrical cleaning brushes, on which the stencil rests during the cleaning process in a position inclined to the horizontal line. The tub carrying the cleaning brushes is pivotally mounted about a horizontal axis.

Abstract: In a device for applying fluid substances in printing and coating machines, carrying plates are fixed to ends of a carrying beam. The carrying plates have recesses therein in which pivot axles of a coating roller are loosely and rotatably mounted. Stopping surfaces are provided to limit lateral movement of the coating roller by abutting with its pivot axles. The stopping surfaces are formed adjacent the recesses formed in the carrying plates and converge in the direction in which a fabric strip which is to be printed on is moved beneath the roller.

Abstract: An applicator for applying various kinds of paint, liquid adhesives and the like to a surface in such a way that they are spread evenly and uniformly on the surface. The applicator possesses a cylindrical member which has an applicating liquid reservoir formed in it and a conduit to carry the applicating liquid from the outside into the applicating liquid reservoir, and internally apply pressure on a resilient closure which maintains a slit normally closed, such internal pressure causes the slit to open along its entire length when the internal pressure of the applicating liquid in the applicating liquid reservoir is more than a predetermined level. The cylindrical member is designed in such a way that the slit opens equally along its entire length.

Abstract: A squeegee device for applying a substance to a web (5) of material comprising a magnetically attracted squeegee roller (6), a bar (1) along which the roller (6) extends, lateral guide members (3) for the roller (6), whereby the bar (1) is resiliently deformable in a plane parallel to said web (5) and in a plane normal to said web (5) and to said roller (6), and whereby the bar (1) is shorter than said roller (6).

Abstract: A rotary mimeographic printing apparatus comprises a rotary drum for mounting on a peripheral surface thereof a perforated stencil, a clamp pivotally supported on the rotary drum for clamping one end of the stencil in such a manner that the stencil may be wound around the peripheral surface of the rotary drum in response to rotation of the rotary drum, structure for removing the stencil from the rotary drum after printing is finished, and a stencil guide disposed above the rotary drum and engageable with the clamp so as to move following the pivotal movement of the clamp.

Abstract: A roller doctor (squeegee) (1) for applying a fluid material (7), such as substances having different viscosity, coating substances, varnishes, adhesives, pastes, etc. to a substrate (4), has a magnetically chargeable doctor roller (2) and roller supporting members (11). Roller fixing parts (3) are fitted onto the doctor roller (2) and connected by a plug connection (10) to the roller supporting member (11). This leads to a universally usable roller doctor apparatus (1) with a modular structure.

Abstract: The doctor device has a profile member pivotally mounted to a retaining member that is carried on a mount. Vertical movement of the mount causes angular displacement of the profile member thereby changing the material application area disposed adjacent and upstream of the doctor. The doctor is either a doctor blade or roll doctor. In the case of a roll doctor, a receptacle is formed in the profile member and the roll doctor is magnetically retained within the receptacle. During application of a material to an application surface with the roll doctor, the roll doctor is magnetically attracted to the application surface by a second magnetic device located beneath the application surface or work surface.

Abstract: In a rotary stencil printer having a printing drum supported to be rotatable about a central axis thereof and having a cylindrical outer surface adapted to bear a perforated stencil sheet as attached therearound and formed with openings for supplying ink to an inside surface of the perforated stencil sheet, and a back press roller supported to be rotatable about a central axis thereof extending in parallel with the central axis of the printing drum and having a cylindrical outer surface which defines a nip area with the cylindrical outer surface of the printing drum therebetween for nipping and transferring a printing sheet therethrough.

Abstract: A doctor for a flat screen printing machine, shaped as an elongated vessel with variable cross-section along its length, is symmetrical to the vertical axis Z. The height of the vessel is greatest at the point of the Z axis, where there are attached to it a flexible hose for supply of printing paste and a flexible hose for air draw-off. The cross-section of the doctor is an isosceles trapezium, turned with its smaller base towards the flat screen. On this base there is fastened a T-shaped lug onto which there is mounted a U-shaped applying profile made of friction material. In the center of the small base of the trapezium, the T-shaped lug and the U-shaped applying profile there is shaped along the length of the vessel a metering slot.

Abstract: A multicolor rotary screen printing machine comprising a number of parallel cylinder stencils which are located in a common plane and which are each provided, on the inside, with a squeegee consisting of a hollow tube with a squeegee blade, has a novel squeegee suspension. The ends of each squeegee, which project outside the stencil, are suspended from one end of each of a pair of arms, the arms each being guidably bearing-mounted along an individual screw spindle located parallel to the common plane and the screw spindles each being provided with individual driving means, such as individually controlled electric motors and gears. It is thus possible to alter the position of the squeegee within the stencil and to automate the adjustment of the squeegee during operation with the use of suitable control means acting on said individual drive means.

Abstract: A rotary indirect printing assembly for printing objects to be sequentially cycled past the assembly including a printing drum presenting a printing surface and a platform with the printing drum rotatably supported upon the platform. The assembly also includes a transfer roller presenting a transfer surface with the transfer roller rotatably supported upon the platform and rotating in time with the printing drum. The printing surface of the printing drum and the transfer surface of the transfer roller are in tangential rotational contact with respect to each other to transfer an ink image from the printing surface to the transfer surface to transfer the image to an object as an object is sequentially cycled past the assembly. The printing drum and the transfer roller are disposed vertically with respect to the platform.

Abstract: In a screen printing machine, its printing-plate discharge unit is provided with: a pair of printing-plate discharge rollers which may approach to a peripheral surface of a plate cylinder and may also draw therefrom; and a waste-paper container for receiving a waste printing plate having been peeled from the peripheral surface of the plate cylinder. In the waste-paper container is provided a waste printing-plate compression plate which is vertically movable in the waste-paper container. The compression plate is moved up and down in the waste-paper container by means of an operation means which is provided in a position outside the waste-paper container. The compression plate compresses the waste printing plate in the waste-paper container when moved downward therein.

Abstract: A squeegee device destined to be used in a movable stencil, comprises a support structure for a squeegee element which, in operation, is held slightly curved under some pressure in contact with the stencil, a closure strip being mounted upstream of the squeegee element and also being in contact with the stencil, so forming an adjustable gap being sealed at both ends, means being provided for the supply of pressurized viscous substance to said gap.

Abstract: The method of screen printing with a hot melt foam composition includes providing a screen having the desired pattern to be transferred to a substrate, casting onto the screen a hot melt foam composition and forcing the foam composition through the screen to form the described pattern on the substrate. The method offers a number of advantages including the transfer of large amounts of hot melt inks through the screen, fast printing speeds, printing with highly viscous polymeric or thermosetting materials and control of processing temperatures, among other advantages.

Abstract: The invention is directed to a method of printing a pattern on a substrate, the liquid retained within the printing screen is in a first position directly above the point of tangency between the screen and substrate so that a lesser quantity of liquid is deposited to provide raised beads of liquid comparable in size to the size of the apertures of the screen.The reservoir of liquid is shifted away from the point of tangency and therefore a larger quantity of liquid passes through the apertures because the apertures are now spaced from the substrate. The larger quantities of liquid flow together and therefore, a pattern is provided larger than the aperture size of the screen.