Abstract: There is disclosed a solder paste screen printing apparatus and a solder paste screen printing method, in which a force of pressing of a squeegee can be adjusted delicately and accurately so as to effect the printing of solder paste with the optimum pressing force. A squeegee is connected to a lower end of a rod of a cylinder, and a load cell is provided above the rod. A first pressure and a second pressure are applied respectively to an upper chamber and a lower chamber of the cylinder. A load, applied to the load cell, is measured while varying the level of the first pressure, and the pressure measurement for the pressing force is effected in accordance with the measured load. In accordance with this result, the instruction pressure for the cylinder, which is necessary for obtaining the optimum pressing force, is determined, and then the printing of solder paste onto a substrate is started with this instruction pressure.

Abstract: A stencil screen printing apparatus for printing rigid sheets comprising an intermittently rotatable cylinder, a reciprocable stencil screen frame, a power drive for the cylinder and stencil screen frame to move them in synchronism with each other, a vertically reciprocable squeegee above the cylinder, infeed belts for feeding rigid sheets along a path toward the cylinder, a variable speed drive for the infeed belts, and controls to slow the drive for an increment of the belt advancement and then stop the drive, sheet pushers and a variable speed servo screw drive operably connected to the sheet pushers, the sheet pushers being forwardly shiftable toward the cylinder to push the rigid sheet front edge beneath the squeegee and the stencil screen frame, and side registry alignment pusher tabs and a variable speed servo screw drive for laterally aligning the rigid sheet relative to the cylinder, whereby the sheet pushers and the side registry tabs simultaneously align the sheet at 90.degree.

Abstract: A roller squeegee apparatus for screen printing includes a resilient receptacle receiving a supply of printing material at one open side thereof. The resilient receptacle is connected at another open side thereof to a printing squeegee. One or more driven rollers are provided for squeezing the elastic receptacle for providing consistent and stable printing operations. Such arrangement of the roller squeegee apparatus provides relatively high printing precision even over long periods of continuous use.

Abstract: A squeegee (K1-K3) for screen printing, comprising: a squeegee body (1) which is formed by a metal sheet and has a squeegeeing face (1a) and a convexly curved pressing edge (3) on the squeegeeing face (1a); wherein when the squeegee (K1-K3) is set for squeegeeing such that the squeegeeing face (1a) is oriented in a travelling direction (X) of the squeegee (K1-K3), a center (O) of curvature of the convexly curved pressing edge (3) extends substantially horizontally.

Abstract: A novel electroformed squeegee blade for the uniform deposition of printing material such as solder paste and the like onto printed wiring boards is disclosed. A method of fabricating the electroformed squeegee blade is also disclosed. The method of fabrication, which produces an electroformed squeegee blade having smooth, planar, and flat surfaces, involves electroforming at least one uniform layer of metal onto a conductive substrate and removing the substrate. Also disclosed is an apparatus and method that employ the electroformed squeegee blade to uniformly deposit printing material on printed wiring boards.

Abstract: A stencil printing machine includes a holding device for holding a stencil sheet perforated in accordance with an image; an ink supply device for supplying ink to one face side of the stencil sheet held by the holding means; a printing sheet conveying device for conveying a printing sheet in a predetermined direction near an opposite face side of the stencil sheet; and an air ejection means for ejecting air to the stencil sheet from the one face side of the stencil sheet and thereby causing the ink to pass through the image in the stencil sheet and transfer onto the printing sheet.

Abstract: A cylinder-type silk screen printing machine includes a printing cylinder that collects an object to receive the print and a screen carriage with printing blades applied against the screen pattern, which travels over the cylinder, wherein the screen pattern and cylinder are moved during the printing process at a synchronized speed.

Abstract: An apparatus spreads and positions ink into orifices of a screen fabric for printing. The apparatus has a flooding portion having an ink interaction surface spaced and overlying the screen. The ink interaction surface is adapted for interacting with the ink to force the ink into the orifices of the screen fabric. Several of the embodiments of the apparatus have a bottom surface generally parallel to the screen, wherein the bottom surface has sufficient width for forcing the ink into the orifices of the screen fabric. In addition, the ink interaction surface in several of the embodiments has at least one concave curved portion adapted for rotating the ink. In some embodiments, the ink interaction surface has a pair of concave curved portions wherein one of the concave curved portions has a larger radius than the other concave curved portion.

Abstract: A screen printing device for screen printing a thick film ink through a screen so as to form a highly-defined thick film on a surface of a microelectronics circuit. The screen printing device achieves the above by bypassing excess ink that would otherwise accumulate ahead of the squeegee device, thereby limiting the pressure lead length ahead of the device during the screen printing process. As such, the screen is able to form an adequate seal with the surface of the substrate to prevent ink from bleeding out under the screen, i.e., between the screen and substrate. The result is a well-defined thick film on the substrate, and avoids the necessity of stopping the printing operation in order to remove ink from the lower surface of the screen. The screen printing device enables a method by which well-defined films can be readily deposited at high throughput levels, without necessitating additional procedures, equipment and techniques that might otherwise further complicate the printing process.

Abstract: The rotary screen printing machine has a form cylinder (1) which carries a screen printing stencil (3), and an impression cylinder (2) having at least one cylinder pit (4), in which sheet grippers (5) are installed. In their closing position, the sheet grippers (5) do not project above the printing surface of the impression cylinder (2). Arranged inside the form cylinder (1) is an adjustable doctor (6) which can be controlled by an actuating mechanism (7, 8, 9) in such a way that, during a printing operation, the doctor (6) is pressed against the inside of the screen printing stencil (3), but is lifted off from this screen printing stencil when the open region of a cylinder pit (4) of the impression cylinder (2) passes the form cylinder (1).

Abstract: Bottles are decorated while advanced by intermittent motion to each of a plurality of decorating stations where a squeegee presses a decorating screen into line contact with a surface of the bottle which has a speed the same as the speed of which the decorating screen is advanced along the printing station. The bottles are decorated at a higher through put rate by initiating linear movement of the screen before the bottle arrives at the decorating station and continuing linear movement of the screen after the bottle moves from the decorating station. The degree of overlap allows the printing cycle to consume a major part of a machine cycle while the bottle indexing cycle consumes a minor part of the machine cycle. The bottles are received in a vertical orientation and intermittently re-orientated horizontally for entrance to the decorating machine.

Abstract: In a method and apparatus for printing on objects using a screen printing procedure, the print image applied to a respective object is dried by UV-rays produced by at least one UV-radiating device. Drying of the applied print image is effected during a transportation movement which the object performs in order to be transported after the drying operation from one location to another. The radiating device which produces the UV-rays is moved with the object at least during a pert of the transportation movement in the direction of movement of the object, in such a way that in such movement the print image is dried.

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 printing assembly for a printing machine comprises a drum mounted for rotary movement about an axis and supporting a plurality of object holders parallel to the drum axis and uniformly circumferentially spaced around the axis. A drum drive imparts continuous rotary movement. A printing station at the periphery of drum for printing successive objects in the course of displacement by the printing station. The printing station is carried by a beam and includes a screen and squeegee. A beam drive is synchronized with the drum drive and imparts arcuate reciprocating movement to the beam about the axis such that the printing station tracks movement of an object at the printing station. The screen is disposed substantially parallel to the axis and mounted for tangential movement to the drum and the object at the printing station. A screen drive imparts rectilinear reciprocating movement to the screen relative to the beam in synchronism with beam movement.

Abstract: A machine screen-prints the surface of flat objects or objects with a convex, curvilinear transverse section, such as bottles or cans. It is formed to be adapted rapidly for the printing of containers with any radius of curvature, however small, without having to go through the laborious replacement of mechanical parts and without causing harmful mechanical vibrations, even during heavy duty use. The machine includes a printing station in which the container (2) oscillates around a longitudinal axis passing through the center of the mouth of the container, with the top surface of the container, tangent to a screen (3) which moves in a longitudinal direction. The upper surface of the screen is scraped by a squeegee fitted above it which presses the ink through the mesh of the screen and is synchronized to operate alternately with it (in opposite directions). The bottom edge of the squeegee follows an arcuate oscillating trajectory.

Abstract: The invention relates to a stencil printing machine (1) having a printing table (2), a reciprocatingly movable stencil frame (4), a stencil (5) mounted in the stencil frame, a squeegee arrangement (6) which is intended, during a common movement of the stencil frame and printing table, to press print substance through a first pattern formed in the stencil and onto print material (7) located between the printing table and the stencil such as to apply a second pattern on the print material. The machine also includes a device (8) for compensating distortion of the first pattern carried by the stencil during a printing sequence. This device (8) comprises a guide rail (10), a slide (11) which can be moved along the guide rail in response to frame movement, and means (12) which coacts with the slide and which is intended to displace the stencil (5) in a direction in which distortion of the pattern as a result of cloth stretch is compensated for.

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: A dual-purpose apparatus for selectively applying an emulsion onto a mesh screen of a screen printing plate and attaching an emulsion layer-containing film to the screen, comprises a printing plate support for supporting the screen printing plate, a film feed device for feeding the emulsion layer-containing film, a film guiding-and-cutting mechanism for guiding the emulsion layer-containing film along the mesh screen of the screen printing plate, and a pressing-and-applying mechanism for pressing the emulsion layer-containing film and for applying the emulsion onto the mesh screen. The pressing-and-applying mechanism includes a support for replaceably supporting a pressure roller unit or an emulsion bucket.

Abstract: This invention relates to a fully automatic curved-surface printing machine, which has a feeding mechanism, a screen block reciprocating mechanism, an elevation printing mechanism, a transmission system and a circulatory conveyor belt. The transmission system is the only means which provides the dynamic force to all the mechanisms. The feeding mechanism and the conveyor belt are set on the same conveying line. The feeding mechanism is designed to automatically push the curved-surface tube forward. The screen block reciprocating mechanism coordinates with an intermittent printing mechanism to enable the conveyor belt which moves intermittently to convey the curved-surface tube to the preset position. At this time the printing mechanism will push the curved-surface tube to the position ready for printing. The screen block reciprocating mechanism will activate the screen block to conduct its printing reciprocation.

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: This invention relates to a micro-curvature adjustable device for curve screen printing presses and ironing presses and in particular to one including an upper cover provided with a tool post in a front side and an adjusting mechanism on an upper surface, an oscillating plate mounted below the upper cover and having a front seat, a horizontal sliding block for passage of a shaft, and a pair of clamping arms in the front side, an oscillating arm arranged on the upper cover and connected with a front linking block, a downward oscillating block and a rear linking block, a rear connecting arm mounted under the upper cover and having a rear horizontal groove and a plurality of rear vertical sliding blocks in an inner side, an axle seat arranged between the front connecting plate and the rear connecting plate and having a pivoted gear engaged with a front toothed rack and a rear toothed rack, a front connecting plate provided with a front horizontal groove and a plurality of vertical sliding blocks at an inner side

Abstract: Apparatus for the transfer of ware in step-wise fashion from one point to another with silk-screen printing of the ware between the remote points. The articles of ware, in spaced-apart locations, are moved by an elongated horizontally disposed beam having a plurality of spaced-apart wareholders from a rearward horizontally disposed rest position downwardly in an arcuate path and then upwardly to a second forwardly located rest position in the same horizontal plane. The articles of ware are then each clamped while the beam reverses direction. A further article of ware is placed in the first wareholder, the other forwardly located articles being received in respective forwardly located wareholders. The beam then again moves forward and the articles of ware are each clamped. The beam then reverses direction, receiving a further article, etc. At the print station the articles are each raised vertically upwardly in a smooth curve, printed, and then lowered vertically downwardly in an opposing smooth curve.

Abstract: The carriage of a printing machine, in particular a silkscreen printing machine, carrying the printing device is mobile on a guide carried by arms forming with uprights a set of deformable parallelograms. Lifting means include a cam whose edge cooperates with a cam follower roller carried by a longitudinal member controlling this set of deformable parallelograms. The longitudinal member is pivotally supported by two same level arms of the set of deformable parallelograms. It interacts with an angular orientation maintaining device which maintain the axis of the cam follower roller parallel to the axis of the cam.

Abstract: The squeegee arm and screen frame portions of a tilt screen type screen printing machine are pivotally connected to specially designed rocker housings slidably movable along horizontal support rods. The rocker housings have portions which are not rotated by pivoting of the squeegee arm and screen frame, thus permitting such rocker housing portions to be horizontally driven along the support rods by rodless air cylinders mounted on the machine. Additionally, the nonrotatable portion of the screen frame rocker housing carries a horizontally disposed gear rack which can be operatively mated with a pinion drive gear portion of a rotatable fixture supporting a round item to be printed so that horizontal translation of the rack rotationally drives the fixture during the screen printing process. Because of the rocker housing design, upward tilting and horizontal movement of the screen frame does not disrupt the rack and pinion registry.

Abstract: During printing operations, the rack of a print frame and the rack of an operation piece attached to the bottom face of the print frame are continuous. These racks are engaged by gears attached to a print cylinder. The print frame is moved in synchronization with rotations of the cylinder. When printing is stopped, a camming arrangement raises the operation piece to release the operation piece from the gears so that the print frame can be pulled from the machine base independently from the cylinder.

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 method and apparatus for applying a liquid emulsion to a screen. The apparatus includes a rotatable trough holding a liquid emulsion, which is mounted to allow the trough to rotate and coat the screen with the emulsion as the screen is moved over the trough.

Abstract: A flat bed screen printing machine wherein the material to be printed is movable in stepwise fashion with or relative to an assembly including a flat bed at one side and a screen at the opposite side of the path for the material. The material moves with the assembly during application of paste and moves slowly relative to the assembly while the latter moves rearwardly to its starting position. The slow movement of the material serves to move its passer marks to optimum positions with reference to a detector. One or more stationary squeegees are adjacent the screen. The screen can move relative to the squeegee(s).

Abstract: A printing machine suitable for printing objects with an oblong or a circular transverse cross-section includes a fixed printing shaft. An object to be printed is rotated about the printing shaft in contact with a flat printing plate or the like carried by a mobile assembly. The distance between the printing shaft and the printing plate or the like is corrected automatically. A drive shaft rotates the object to be printed through a transmission system which provides at least two transmission ratios.

Abstract: A screen printing machine with at least one screen printing unit having a flat screen which is inclined relative to the horizontal so as to reduce the floor space requirements and is reciprocable up and down by a rack and pinion drive. A drying arrangement for the webs or sheets which are treated in the machine is disposed at a level below the screen, and each unit has a platform which is adjacent a web- or sheet-supporting cylinder to facilitate immediate inspection of the web or sheets downstream of the printing station between the screen and the cylinder. The latter is indexible about a fixed axis.

Abstract: A rotary tampon printing machine to print the edge area of automobile glazings is distinguished in that the tampon placed on the tampon roller exhibits a flange whose surface that transfers the printing ink corresponds to the frame-shaped printing design. As a block there is a screen printing stencil that is placed above the tampon roller. The tampon roller transfers the printing ink from the screen printing stencil to the glass sheet.

Abstract: A grip shaft is supported on a cylinder that makes an oscillating (reciprocating rotational) motion. The grip shaft is provided with a grip for holding a printing material. The grip is further provided with a cam follower. A cam is positioned along the path of motion of the cam follower, and the cam follower engages with an opening portion of the cam when the grip is right before a printing material feeder portion, and opens the grip. Further, when the grip reaches the printing material feeder portion, the cam follower moves to a closing portion of the cam, closing the grip to hold a printing material. After the grip has held a printing material, the cam follower disengages from the cam as the cylinder is rotated in the opposite direction. The opening portion and the closing portion composes a continuous cam surface.

Abstract: A method and apparatus for automatically screen printing on objects includes a first transfer mechanism having suction cups for swinging the objects from a supply station at which are located a plurality of the objects to a preregistering station at which is a preregistering device which rotates the objects into a predetermined orientation closely positioned to a reference position to which the object is printed. From the preregistering station, the objects are swung by a second oscillating transfer means to a third oscillatory transfer means which swings the preregistered objects to the printing station. Preferably, the objects are swung into a holding station wherein the objects are held between transfer movements by the respective second and third transfer means.

Abstract: A silk screen printer includes a cylindrical printing table for applying print to a sheet material and a stencil which is stretched in a frame. The stencil is adapted for reciprocating movement in response to reciprocating movement of the printing table and a squeege arrangement is included for urging the stencil towards the printing table to thereby transfer print onto sheet material located between the printing table and the stencil. A gripping device is provided for gripping the forward end of the material. The gripping device is movable with the frame in the direction of the longitudinal extent of the frame. A spring device urges the gripping device towards a movement-damping member whereby the gripping member is registered in relation to the chassis of the printer. The registration of the gripping device relative to the chassis is independent of the stop position of the frame and the printing table.

Abstract: A machine for printing oval objects. The oval object has imparted to it a simple pivoting movement about an axis which is separate from the center of the radius of curvature of a section of the area of the object to be screenprinted upon. The printing screen which is attached to a printing or a screen support is moveable to correct simultaneously the distance between the screen and the rotation axis of the object. The printing machine is applicable to processes for decorating convex surfaces by screen printing, hot pressing, and dry offset printing.

Abstract: An improved cylinder-type screen printing apparatus utilizes recessible pushers and stops to translate sheet stock along the supply bed to the cylinder without imparting any substantial bending moment to the sheet stock. The absence of bending forces permits the apparatus to be used for printing on rigid materials.

Abstract: In the course of continuous movement along a track that is essentially circular, articles undergoing an imprinting process are passed through a plurality of print stations, individual silk screen stencils at the stations being adjusted to the resulting changes in the position of the article that occur during the imprinting process as the article moves through the printing machine. The articles can be arranged with their longitudinal axes either horizontal or vertical during the imprinting process. It is also possible to introduce the articles into the machine with their longitudinal axes vertical, then move them into a position in which their longitudinal axes are horizontal and imprint them in such a position, and then bring the imprinted articles once again into a position in which their longitudinal axes are vertical so that they leave the machine in this position.

Abstract: An improved mounting assembly for removably mounting a stencil screen stretch frame in a so-called silkscreen printing press in a manner which facilitates removal and replacement of the screen frame, reduces the frame cost, and renders the frame easier to handle and stack. The mounting assembly includes mounting means to be secured to the frame mounting portion of the printing press and readily accessible, easily releasible fastening means releasibly securing the screen frame to the mounting means.

Abstract: A screen printing machine has a reciprocable printing screen and below it a counter-pressure roller. Above the screen a squeegee unit is movable relative to the screen and has two vertically displaceable parallel squeegees. During movement of the screen in one direction, one of the squeegees forces ink through the screen and the other squeegee is retracted. During reverse movement the one squeegee is retracted and the other one pushes the ink pool over the screen back to the starting position. In the starting position, the one squeegee is lowered again and the other squeegee is retracted. The transfer of the ink pool from the other squeegee to the one squeegee takes place directly above the printing line which is defined by the screen in conjunction with the counter-pressure roller. The screen printing machine is provided with a control device for coordinating the movements of the squeegee unit with the movements of the printing screen.

Abstract: The nadir of a cylindrical printing screen rotatable about a horizontal axis is pressed against an underlying substrate, moving over a flat support, by a wiper in the form of a roller or a blade which is attracted by a bank of electromagnets having pole faces flush with the upper surface of the support. The line of contact between the screen and the substrate, determined by the location of the wiper inside the screen, is offset in the direction of substrate motion from a common midplane of the underlying pole faces; the extent of this offset, designed to stabilize the position of the wiper, is adjustable to accommodate substrates of different thicknesses.

Abstract: An apparatus for printing a pattern of a flat horizontal screen on an underlying substrate comprises a wiper assembly mounted on a carriage above the screen and an electromagnet beneath the screen reciprocable along the latter jointly with the carriage. A cradle limitedly pivotable on the carriage about a horizontal axis extends across the screen and supports, via adjustable holders, a working wiper and a distributing wiper on opposite sides of its pivotal axis. The working wiper, which may be a blade or a roller, directly overlies the electromagnet and is magnetizable and/or accompanied by a magnetizable mass whereby energization of the electromagnet attracts the side of the cradle bearing that wiper to press it against the screen for forcing dyestuff therethrough onto the substrate, this side trailing during a printing stroke.

Abstract: An applicator for applying a foamed treating medium to a sheet-material workpiece has a chamber through the open top of which the foamed medium is introduced, and an open bottom through which the foamed medium is discharged towards the workpiece to be treated. To assure that the upper surface of the foamed medium in the chamber is always maintained at a constant level, an equalizing member extends across the open top of the interior of the chamber, and a drive is provided which reciprocates or otherwise moves the equalizing member relative to the open top so as to smooth out any portions of the foamed medium which extend upwardly beyond the desired level.

Abstract: An apparatus for applying a treating medium to a screen has a container above the screen and a pipe which discharges foamed treating medium into the container from where an outlet leads to the screen. A foam generator supplies the foam and the pressure at which the foam enters the container can be regulated.

Abstract: Apparatus for applying a foamed treating medium to the upper side of a substrate has a screen which confines a system of walls defining a chamber open at its underside adjacent to the screen and including a squeegee which serves to force the foamed medium from the interior of the chamber through the interstices of the screen and into the substrate. The chamber accommodates a reciprocable and/or rotary device for shifting the foamed medium therein so that the medium cannot age and change its color and/or other characteristics prior to application to the substrate.

Abstract: A device for pressing a squeegee for printing used in a screen printing machine. A screen plate is reciprocated and printing paper sheets are fed to the lower surface zone of the screen plate in timing with forward movement of the screen plate. A differential gearing is operatively associated with a cam driven from a drive source for the printing machine, and a link mechanism actuated by said cam, so that the squeegee is lowered by operation of the differential gearing and the screen plate is pressed by said squeegee for printing. In case of dismounting the screen frame from the machine frame for cleaning the screen plate, the casing for the differential gearing is rotated by drive means for raising the squeegee a larger distance stroke. The link mechanism is not driven into operation when the casing for the differential gearing is rotated during such upward travel of the squeegee.

Abstract: For use in a silk screen printing machine including an impression cylinder and a doctor-blade mounted parallel to the surface of the impression cylinder for movement relative thereto; a doctor-blade supported at opposite axial ends respectively by a pair of fluid pressure operated piston and cylinder devices and flow control valves are disposed between a source of pressurized fluid and the devices respectively for raising and lowering the doctor-blade relative to the impression cylinder. A cam mounted for rotation with the impression cylinder coacts with a switch to operate the control valves.Combined with the above are a pair of additional piston and cylinder devices coupled to said doctor-blade support, and associated control valves for controlling the pressure or force applied by the doctor-blade to the surface of the impression roller.

Abstract: A wire printer including a group of substantially straight and parallel printing wires or needles guided at their front ends for longitudinal movement towards and away from a printing station. Each of the printing wires is at its rear end connected to one end of an electromagnet armature the other end of which is supported by a flat spring. The armature cooperates with an electromagnet core provided with a winding. The core as well as the armature consist of strips of magnetic material. The core strips as well as the flat springs are mounted on at least one common rod engaging holes in the rear ends of said core strips and flat springs. The front end of each of the flat springs lies clear of the armature strip and serves, in combination with a stationary rest, to provide a force tending to move the front end of the armature strip away from the core strip.

Abstract: The invention relates to screen printing apparatus which comprises a printing station, means for feeding a web of material to be printed to the printing station and away therefrom, a squeegee mounted at the printing station for cooperation with a screen printing mesh, means for attaching a screen printing mesh tensioned on a frame so that part of the mesh is at the printing station, means for reciprocating such a screen printing mesh in a frame through the printing station, means for feeding ink to one side of the squeegee, a profiled support at the printing station for supporting the material to be printed, and means for advancing the screen mesh in a frame and the material to be printed at the same speed past the printing station while biasing the screen mesh by means of the squeegee towards the support. According to the invention the profiled support is movable in order to compensate for changes in the shape of the screen mesh during the printing stroke.

Abstract: Apparatus for screen printing on cylindrical surfaces in which the driving force is created by rotation of the object to be imprinted. The force is transmitted by a belt mechanism and by direct friction between the object being printed and the stencil frame. The stencil frame is mounted for linear movement with minimum yawing and with freedom for vertical movement as required. The printer has particular advantage when the object being printed has a large moment of inertia or is circumferentially unbalanced.

Abstract: This invention relates to an improvement in a doctor blade device adapted for use in an automatic processor for printing plates, comprising at least one doctor blade made of a flexible material and being detachably mounted in a guide bar, and holding means for attaching the doctor blade to two side plates of the printing plate processor, the improvement comprising means connecting the guide bar with a carrier bar each end of which is adapted to be inserted from above into a channel section having an upwardly pointing opening and having two arms spaced by a web; means securing each channel section by its web to a side plate in such a manner that its two arms extend transversely to the transport direction of a printing plate in the direction of the interior of the printing plate processor; and support means at both ends of the upper surface of the carrier bar whereby the carrier bar together with the connected guide bar and the doctor blade rest upon said channel sections.