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: An apparatus for over the edge printing including a printing squeegee which forces ink through clear portions of a printing screen onto a workpiece. Excess ink which is forced through clear portions of the printing screen and which extend over the edge of the workpiece, are cleaned by a cleaning assembly which includes a cleaning belt. The cleaning belt is unrolled below the printing screen and an excess ink squeegee prints the excess ink onto the cleaning belt which is then cleaned and re-rolled and the apparatus is made ready for the next printing stroke.

Abstract: An improved screen printing apparatus for printing conductive, resistive and insulative films to the surfaces of ceramic or glass substrates. The screen printing apparatus is characterized by a carriage having a substrate to be printed resting thereon and a frame member extending about the periphery of the carriage. A mesh screen having an emulsion layer is affixed to the screen and suspended over the substrate. The improvement comprising a pair of force absorbing members attached to the carriage in a space relationship to and on opposite sides of the substrate. A pair of rolling means are attached to opposite sides of a squeegee holder with each rolling means in registration with a respective force absorbing surface. A squeegee extends from a bottom surface of the squeegee holder intermediate the rolling means. As the squeegee holder is drawn across the screen each rolling means travels along a respective force absorbing member.

Abstract: A screen printing assembly attachable to a silk screen frame including a support frame positionable adjacent and attachable to the screen frame. A squeegee and flood bar assembly deposits and forces ink on and through the screen and onto a substrate disposed adajcent the screen. The assembly includes a mechanism movable along the support frame and the screen frame and a flexible sheet is attached to and moves with the mechanism. The flexible sheet is sealed to the support frame, and forms in part a sealed chamber in which the squeegee and flood bar assembly deposits the ink on the screen. Solvents can be sprayed into the sealed chamber which contains the solvent so that it does not escape not the atmosphere. An inert gas is injected into the chamber displacing the oxygen in it so that the ink does not dry out as rapidly, and safely maintaining the contained solvent. A method for screen printing using this sealed chamber.

Abstract: A screen printing installation of the type in which a magnetic member below to be printed attracts an ink applying element against a pattern and a fabric on a support, in which the support is tensioned between a pair of members on an inner frame completely separate from an outer frame in which the upper pattern carrying the carriage is guided. The lower carriage carrying the magnetic member and the upper carriage can be coupled for joint movement through the gaps between the support surface and the longitudinal elements of the outer frame.

Abstract: An automatic peel control mechanism for use in a screen printing press employs a cam-driven mechanical linkage to raise the front end of the screen frame at a controlled rate to a predetermined height above the printing bed in timed relation to the motion of the carriage which transports the squeegee. The linkage includes a pair of elongated reciprocating bars which extend the length of the printing head and are connected to lifters at their forward ends to lift the front end of the printing screen. The cam is rotatably mounted upon the carriage drive shaft. The rotation of the cam is controlled by a roller chain assembly which maintains a timed relationship between the cam and the drive shaft. The initial off contact dimension and peel rate may be readily adjusted by varying the initial position and the rate of travel of the elongated bars.

Abstract: A carriage drive mechanism for a screen printing press includes a stroke adjustment mechanism which enables the length of the printing stroke to be altered quickly and conveniently from the exterior of the press without interrupting operation of the press.The preferred drive mechanism includes a pivoting drive lever joined to a crank link by a movable connector. Longitudinal displacement of the connector on the drive lever alters the length of the stroke of the drive lever, which alters the length of the printing stroke. The preferred means for displacing the connector includes a threaded rod which is disposed within the drive lever and which extends through a threaded bore in the connector so that rotation of the threaded rod about its longitudinal axis imparts longitudinal motion to the connector.

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: A `flat` silk-screen printing machine is disclosed wherein the table is reciprocably displaced along an inclined table support between a raised, advanced, printing position wherein the table is parallel to and immediately below a horizontal screen and a lowered, retracted, access position in which the table is inclined and extends forwardly of the inclined table support so that the greater part of the table protrudes outwardly of the machine, thereby providing enhanced access for positioning and removing the substrate to be printed. The table is pivotally mounted on the inclined table support and pivoted by a combination of a linkage and fluid cylinder and is attached to a belt running along the inclined table supported for translation up and down the same.

Abstract: Apparatus is disclosed for the production of silk screened textile goods. Workpieces are positioned on pedestals of a conveyor at a printing station and a silk screen design is then printed thereon. Cyclical operation of the conveyor incrementally advances the printed workpieces to a "drying" station where the printed designs is converted to solid form. The ink employed is plastisol based and is converted or "dried" to solid form primarily through polymerization. The "drying" station employs a heater element which selectively emits infra-red radiation spectrally limited to a wavelength range of three to four microns, a wavelength range at which the liquid plastisol exhibits a peak of radiation absorption. Operation of the conveyor is responsive to the rate at which an operator silk screens the workpieces with means being provided to retract the heater element from its operative position if this rate falls below a predetermined pace in order to avoid over exposure of the workpiece to the infra-red radiation.

Abstract: The basic module comprises a frame, a support which is mounted to reciprocate vertically on the frame adjacent the rear thereof, and a printing screen, which projects horizontally forwardly from the support in cantilever fashion. A cable, which is attached at one end to the support and at its opposite end to the frame, passes intermediate its ends over a plurality of pulleys, certain of which are mounted on the frame, and one of which is attached to a counterweight located beneath the frame. The weight is carried on one end of a pivotal treadle, the opposite end of which is adapted to be manipulated by the foot of an operator standing in front of the frame. Normally the weight is in a lowered position in which it causes the cable to retain the screen in an elevated position, but when the foot treadle is depressed, the weight is lifted and the screen and its support drop by gravity to their lowered positions.

Abstract: A screen printing machine has at least one printing station wherein rotary or flat screens are used. Downstream of the printing station, there is provided a heated continuously or discontinuously driven roller over the heated jacket of which the web is trained. The web preferably consists of impermeable material. The heated roller defines a drying path. A cooling unit is disposed downstream of the drying path and is preferably defined by a cooling roller which is connected to a cooling device. A web supplying roller is mounted at the inlet of the machine and a takeup roller is mounted downstream of the cooling unit. The transport of the web may be controlled during forward movement as well as during rearward movement. The machine is compact because the cooling unit and one of the web supplying and takeup rollers are disposed at a level below the printing station.

Abstract: A method and an apparatus for applying an emulsion onto a screen printing plate are disclosed, in which two squeegees are arranged on either side of the screen, one squeegee of which is directed to the applying operation and the other squeegee is directed to the scraping and recovering operation. In accordance with the invention, a high quality screen printing plate may be obtained and very convenient operation and handling may be achieved.

Abstract: A screen printing machine has a carousel rotatable about a central support and carrying a circular arrangement of work-receiving tables. A framework interconnected with the central support carries corresponding screen printing units. Rotation of the carousel causes the work-receiving tables to come into registry with corresponding printing units for screen printing of work carried by the work-receiving tables. Each such unit includes a squeegee support frame pivotal relative to the framework for movement between raised and lowered positions. A screen frame is carried by the squeegee support frame. A squeegee and a scraper blade are supported by a carriage traveling over the squeegee support frame for reciprocal movement over the stencil frame for screen printing of work pieces carried by a corresponding work-receiving table. A cam carried by the framework includes first and second planar surfaces forming an angle <180.degree. between them.

Abstract: Disclosed is a system for dispensing ink to a silk screen for printing thereby. A squeegee is reciprocated relative to the silk screen and each cycle of movement provides an air pulse to a counter. The counted pulses are compared with a preset number of pulses based on the actual amount of ink which is used during the printing operations. When the counted pulses are counted up to the preset number, a control signal is fed to a valve to operate a piston and cylinder assembly which is coupled to a piston to force a measured quantity of ink from a cylinder. The cylinder is fed with a supply of ink from an ink pot. A check valve in the bottom of the cylinder opens only when the ink in the cylinder is pressurized by the piston. The measured quantity of ink dispensed from the cylinder is delivered by a conduit to the silk screen.

Abstract: In a known hot melt screen printing machine the printing ink is heated by an electrical current which is conducted through a stainless steel mesh of a screen plate. In the known machine, the printing accuracy is not good, mainly because of variation of tension and thermal expansion of the mesh.The mesh according to the present invention consists of insulating material fibers and an electroless plating layer formed on the fibers. The plating layer preferably consists of a nickel phosphorous alloy. A squeezing means for forcing the printing ink to pass through a printing pattern and/or a printing base for mounting an article to be printed are provided with a heating means. One of the advantages of the present invention is a high printing accuracy.

Abstract: A printing process employing a water-based foamable ink composition comprising the following steps:(a) foaming the ink composition,(b) applying a coating of the foamed ink composition to the surface of a gravure cylinder which has an array of open cells spaced on the surface thereof,(c) doctoring the surface of the cylinder to convert said coating into discrete thin membranes spanning said cells, and(d) transferring the membranes to a web surface, either directly, or indirectly via one or more intermediate transfer rolls.

Abstract: Silk-screening apparatus for applying a pattern on a substrate surface includes suction applying facilities for returning residual pattern forming medium back through a screen member to the upper surface thereof after a pattern has been applied. Means are provided for adjusting the magnitude of suction from a minimal value adjacent imperforate portions of the screen member to a substantially constant value adjacent perforated portions sufficient to draw the pattern-forming medium back to the upper surface. Means are provided for maintaining a substantially constant magnitude of suction as a suction applying member passes over perforated portions of the screen member having varying degrees of porosity.

Abstract: A printing apparatus applies material to a carrier through a planar screen aving a pattern including a number of lines substantially parallel to a first direction. The screen and carrier are mounted so material forced through the lines of the screen is deposited on the carrier in the same pattern as the pattern of the screen. A blade having an elongated, straight edge is positioned to force the material through the screen onto the carrier. The blade is supported and actuated so that the blade is displaced in a plane parallel to the plane of the screen and in a second direction. The second direction is adjustable to any angle with respect to the first direction, so that the blade can slide parallel to the lines in the screen.

Abstract: A screen printing press including structure and electrical control circuits which permit selection of optimum speeds for the flood and print strokes, and which speeds may differ one from the other.

Abstract: In a screen printing machine having a plurality of workpiece supporting pallets that are driven along an oval path and which cooperate with a plurality of printing heads that are adapted for movement between an operative, printing position at each of a plurality of printing stations and an inoperative, non-printing position spaced from each of the printing stations, means are provided for selectively indexing the pallets either to an immediate printing station or to a succeeding printing station which is spaced downstream from the preceding printing station in the direction of movement of the pallets by at least one intermediate printing station. The apparatus disclosed herein replaced the hydraulic and electrical apparatus of the prior art with mechanical structure and requires only a single operator as compared with two or three operators with prior art structure. A cable is used in the present invention to replace the power linkage employed in the prior art for raising and lowering the flood bar.

Abstract: An automated screener in which print and flood squeegees are sequentially driven across a stencil screen framed in a chase. After a print stroke, the print squeegee is retracted and the chase is raised a short distance to make contact with the flood squeegee, which is driven in a flood stroke, whereupon the chase is raised further to an open position for removal of the stenciled workpiece. Means are provided for adjusting the print and flood squeegees and for limiting upward movement to predetermined levels during operation of the screener. Particular details relate to an arm carrying the print and flood squeegees over the chase screen. To prevent relative vertical movement between the chase and arm, both are pivoted around a common axis. Translation of the arm across the chase is accomplished by connection to a motor drive chain by means of a hingedly connected pin bearing member which permits the arm to be readily released from the chain when the arm is swung away from the chase.

Abstract: An apparatus for over the edge printing including a printing squeegee which forces ink through clear portions of a printing screen onto a workpiece. Excess ink which is forced through clear portions of the printing screen and which extend over the edge of the workpiece, are cleaned by a cleaning assembly which includes a cleaning belt. The cleaning belt is unrolled below the printing screen and an excess ink squeegee prints the excess ink onto the cleaning belt which is then cleaned and re-rolled and the apparatus is made ready for the next printing stroke.

Abstract: Print rollers are used on a flatbed screen printer to force the ink through the screen. There is provided scraper blades on either side of the roller assembly so that on the return stroke of the roller assembly some of the printing ink is brought back to the lead roller when it starts its movement. This will insure a supply of ink to the lead roller when it moves into the pattern area of the screen thus giving a more uniform ink deposition across the pattern.

Abstract: A screen printing machine has a carrier for an article to be printed, comprising first and second carrier members interconnected by a transverse connecting member. The carrier is reciprocal along the stencil between an article-receiving and an article-discharge station. The connecting member is adapted to pivot to a position beside the carrier, at at least one of the stations, for access to the carrier.

Abstract: The specification discloses a method for screen printing comprising providing a sheet of masking sized to cover a porous printing screen, with pressure sensitive adhesive on one side of the masking and a protective cover sheet thereover. The masking is positioned, cover side up on a work surface, and the desired pattern is scribed on the cover sheet with a pointed instrument, so as to form an indentation in the masking which is visible from the front side thereof. The masking is then turned over on the work surface, front side up, and is cut along the indentation. The cover sheet is peeled from the back side of the masking, thereby removing the enclosed, cut areas from the masking to form a mask or stencil corresponding to the desired pattern. The stencil is then pressed onto the lower side of the printing screen to attach the same to the screen.

Abstract: An automatic apparatus for printing fabrics with a screen printing process, of the type provided with a plurality of printing screens which can be lowered and raised with respect to garment support means. Said support means comprise a plurality of forms mounted at intervals on a conveyor means which is stepwise advanceable so as to bring each form in succession opposite each printing screen.

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.

Abstract: The apparatus has a gas-permeable support for a web to be printed. Below the support is a suction box which applies suction through the support to the web. Above the support is a flat printing stencil which can be raised and lowered relative to the support. Above and in wiping contact with the stencil is a printing-medium container whose outlet discharges printing medium onto the stencil, to pass through the same and be drawn by the suction of the suction box into the web. The container can move to and fro over the stencil.

Abstract: A screen printer has a flat bed coplanar with a loading and an unloading surface on opposite sides thereof, the bed being divided into a stationary middle section and two movable outer sections confronting one another along boundary lines paralleling the direction of movement of copy sheets from the loading surface to the unloading surface. Such movement is effected with the aid of a conveyor comprising two chains underneath the bed entraining sheet-gripping jaws through the gaps formed between these sections when they are transversely separated. The jaws are almost flush with the plane of the bed and the loading and unloading surfaces; upon closure of the bed sections, they are received in cutouts of the outer sections and are thus immobilized while a printing screen descends into contact with a copy sheet overlying the bed.

Abstract: A bottle printer includes a carriage reciprocated along a fixed screen and a squeegee and flood bar carried by the carriage. A bottle support and a nose cone are adjustably supported on the carriage to accommodate bottles of different sizes. A bottle registration mechanism is supported on the carriage and moves with the carriage.

Abstract: This disclosure is directed to an in-line, multi-station screen printer which has a first track for receiving a plurality of platen carriers. A series of printing heads are disposed above the first track and adapted to register with the carriers at pre-selected locations. Means are associated with each of the platens to hold the workpiece in a taut position on the platen. A drying station is located at the end of the printing stations and includes a silicone rubber heater which can be brought into direct contact or close proximity with the platen surface to dry the screening ink or dye. Once the drying cycle is completed, the carriers are discharged on a second, return track to be returned to the loading and unloading end of the machine where the operator can unload the carrier and replace the completed workpiece with a new workpiece.

Abstract: A screen printing apparatus having a screen support carriage and squeegee support mechanism which are both mounted for separate lateral back and forth movement on horizontal support bars which are in turn mounted for vertical movement. The vertical movement of the support bars and the lateral movement of either the squeegee support mechanism or the carriage support mechanism is produced by penumatic cylinders which are sequentially operated through a pneumatic control system.

Abstract: In a screen printing press having a squeegee and flood bar mounted on a movable support carriage, a movable actuator means is provided by the present invention which includes a pivotal lever having a brake pad on its upper end to firmly engage an upper braking surface at the point of transition from the flood mode to the print mode and vice versa in response to change in direction of movement of the carriage, for securing the carriage in a fixed position while the squeegee and flood bars shift position in preparation for the print or flood stroke.

Abstract: A method and machine are disclosed for screen printing acid-resist mirror inversion images in registration on opposite sides of a metal web with a degree of precision sufficient to permit the incorporation of screen printing techniques in the fabrication of lead frames, electromagnetic core laminations, and other metal plate products by chemical milling processes. A matched pair of upright screen stencils supported in spaced relation on opposite sides of the web is provided with a cooperable pair of squeegees for printing through the image areas of the stencils. The directly opposed squeegees are mounted on a common reciprocable carriage for conjoint movement such that printing on opposite sides of the web is effected synchronously. In preferred forms, a web drive is provided for incrementally advancing the web between the stencils and for holding the web under tension during printing.

Abstract: An automatic screen printing process comprising the steps of continuously driving an endless belt to apply and stick a material to be printed onto the endless belt along a predetermined length smaller than one travelling circle of the endless belt, then driving the endless belt intermittently to feed the material to be printed to a printing operation zone and a drying operation zone, while repeating the cycle of the printing operation during stoppage of the endless belt and the operation of travelling the endless belt along a repeat length during stoppage of the printing operation, thereby to print the entire surface of the material applied to the endless belt and dry the printed material, and repeating said printing step until a pattern of a predetermined number of colors is obtained is disclosed.

Abstract: A silkscreen printing machine having a large printing table and a stencil related thereto stretched across said table, said machine being provided with means for moving a squeegee relative to said stencil and for pressing printing ink through the stencil into a material to be printed upon placed on said table. During a printing sequence, and at least during the first and latter stages of said sequence when the squeegee is pressed into abutment with the stencil and when the stencil, located parallel with the printing table is caused to sag by its own weight to an extent such that the stencil at other regions than the engagement point of the squeegee should abut the material or the printing table, the stencil is arranged to adopt an oblique position relative to the printing table such that the angle between said stencil and said table at said squeegee engagement point exceeds 0.degree., meaning that the stencil abuts solely the material at the said engagement point.

Abstract: A continuous-motion decorating machine of the screen and squeegee type which receives the ware, such as glassware, from a delivery conveyor for decorating it usually with several colors. The ware, for example tapered tumblers, is delivered in upright vertical position to a loader and unloader unit of the machine which lifts it so that the ware is successively engaged by the article carrier of the machine, which consists of a spindle-carrying endless horizontal chain conveyor arranged around sprockets to provide one straight side or run with which the loader and unloader unit is associated and three other straight sides or runs with which the screen and squeegee printing units are associated.

Abstract: A screen printing apparatus is provided, having a table on which the blank to be printed may be placed, and with the screen being brought into overlying relation to the blank for engagement of the screen by a squeegee for forcing through the screen, ink that has been applied to the screen, onto the work, with the squeegee generally downwardly pressing the screen a predetermined amount, to engagement with the work, as the squeegee traverses the screen from one end to the other. The screen is pivotally mounted at one end, and the other end is upwardly liftable to peel-off the screen from the work, as the squeegee traverses, so that those portions of the screen through which ink has already been applied to the work may be physically removed from the work to prevent smearing of ink on the work, as well as to prevent distortion. The upward movement of the screen away from the work is synchronized with the traversal of the squeegee across the screen.

Abstract: A screen printing press is provided having essentially three distinct power trains for accomplishing the infeed, printing and removal of stock from the printing bed, which power trains are completely mechanical in operation and are interconnected to operate in a timed relation with one another.

Abstract: A flood bar actuator for initiating the flood cycle in a universal screen printing machine is described. The squeegee assembly is mounted for vertical movement relative to the screen. The flood bar assembly is mounted adjacent the squeegee assembly, with an inner end fixedly mounted to an accessory support, and an outer end pivotally attached to the inner end. A peg extending from the squeegee assembly forces the flood bar up in the print cycle and allows the flood bar to drop onto the screen during the flood cycle. The height of the flood bar is adjustable through the rotation of the screw seated in an opening formed by a split support block forming the opening. A first half of the split support block is pivotally attached to the inner flood bar support as described, while the flood bar is supported from the second movable half. This second movable half has a threaded channel formed in its walls while the first channel has smooth walls.

Abstract: A silk screen printing machine wherein a screen is supported on a frame for engagement with an object to be printed. A squeegee is mounted for engagement with the screen during printing, and drive means operate to displace the screen and squeegee from the printing position after each printing operation whereby a new printing cycle can be initiated. The drive means pivots an arm which supports the squeegee. A link extends from the arm, and the link is operatively connected to the frame supporting the screen. Pivoting of the arm thereby simultaneously moves the squeegee away from the screen while moving the screen away from the object printed. The support for the screen frame is confined by a track holding the frame in a predetermined path of movement toward and away from the object printing position.

Abstract: In a screen printing process and machine for stepwise printing a succession of images, the screen printing stencil is moved along with the material during the printing operation, while the material is supported by a rotatable backing roller against the force applied to the material by the screen and a doctor blade disposed opposite the backing roller. During the printing operation the material is rolled against the stencil by the backing roller which together with the doctor may be moved in the opposite direction to the stencil. The direction of movement of the backing roller and an upstream guide roller, relative to the direction of movement of the stencil, is such as to promote separation of the material after printing from the stencil.

Abstract: A cantilevered takeoff apparatus is provided by the present invention which is particularly adapted to automatically remove printed stock from the bed of a screen printing press and transfer the stock to a wicket dryer, having a plurality of rows of wickets movable along the upper and lower surfaces of the dryer frame, where the stock is released face up on a row of wickets for drying. The cantilevered takeoff apparatus herein enables the wicket dryer to be positioned directly beneath the printed work to receive the work as it is transferred thereto, without obstructing the path of the rows of wickets during operation.

Abstract: The machine for serigraphic printing on planar or circular objects is of the type comprising a support block having a device for holding the object to be printed and a printing screen above which is vertically movable ink squeegee is suspended. The screen and squeegee undergo a relative movement of reciprocating translation. The machine comprises an adjustable device for cyclically limiting the reciprocating travel of the screen relative to the squeegee or vice-versa. The adjustable device acts alternately on devices for controlling, lowering or raising the squeegee relative to the screen or vice versa. The adjustable device is moreover coupled to a device for withdrawing the support block. The support block is provided with an ejector of the objects mounted on the support block.

Abstract: A screen printing machine is described which multiplies the normal carriage stroke of a printing machine to allow printing on the surfaces of large objects of revolution. The drive means comprises a sprocket-chain assembly with a chain connected to the carriage drive for following its lateral reciprocal movement. The sprocket is fixedly mounted in axial alignment with a pinion gear for rotation about that axis. The pinion gear in turn is engaged with a rack gear mounted on the screen. As the sprocket rotates, the pinion gear drives the rack and screen in lateral motion. The ratio of pinion gear diameter size to sprocket diameter size governs the stroke length of the screen. With a large (2 to 1 or 3 to 1) ratio the screen stroke or lateral movement of the screen may be doubled or tripled in length.

Abstract: A screen printing machine for a web intermittently pulled forwardly to receive a succession of closely interspaced prints, has a printing table over which the web is intermittently pulled beneath a printing screen which contacts the web, and during each web stop a printing material knife is reciprocated over the screen to force printing material through the screen onto the web to make a print. A just-printed print can be pulled forwardly under the screen which to accommocate the deceleration and acceleration of its knife, extends forwardly beyond its printing area, so it is possible that still-wet print can be smudged by the screen contact. To prevent this, the printing table is provided with a slot down through which the web can pass so it does not contact the screen beyond the latter's printing area.

Abstract: The present invention is directed to an apparatus for treating sheet material with liquid substances employing a squeegee for the application of ink or the like onto a sheet material by means of a screen. A side stop arrangement employing sealing plates for cooperating with the squeegee, laterally limits the amount of ink being applied to the material. The stop arrangement has at least one wall portion which is inclined with respect to the direction of motion of the screen and the sealing plate is adjusted so that the bottom surface of the plate is in a portion of an ink pool but spaced from a rotary printing screen so as to form a gap between the bottom surface of the sealing plate and the screen.

Abstract: Screen printing apparatus incorporating drive means for a squeegee comprising a drive motor, a lead screw rotatable by the motor and a rider for the lead screw, said rider being coupled to a mounting for the squeegee preferably through stroke adjustment means and the lead screw having two oppositely handed threads thereon such that rotation of the motor causes reciprocating motion of the rider longitudinally of the lead screw at substantially uniform speed.Adjusting means to adjust the distance between two members such as a printing head of screen printing apparatus and a table on which articles to be printed can be laid, comprising a pair of coaxial shafts, eccentric members secured on the shafts, bushes secured to respective ones of said members and means to rotate the shaft such that the eccentrics when rotated in the bushes cause the members to move relatively to one another by the sum of the eccentricity of the two eccentrics having regard to the angle through which they are rotated.

Abstract: A printing machine having a reciprocatingly movable printing table, preferably of the type having a stencil and a squeegee associated therewith is disclosed. Said squeegee being intended, in a printing position for the material, to press printing ink through the stencil to a rigid material arranged beneath the stencil. Said printing table is movable between a first position, i.e. a material insertion position, and a second position, i.e. a material printing position, and said printing table exhibiting one or more fixed registering means arranged to co-act with corresponding registering means in said material to position said material relative to said printing table in the material insertion position of said table, subsequent to the material occupying the printing position and print being applied to said material. The registering means are activated between the printing table and devices releasing said material.