Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compression head cap which provides a contained environment to direct and to aid the flow of pressurized viscous material through the openings in the stencil.

Abstract: Squeegee device for applying printing medium to a substrate, interacting with a squeegee element which is made at least partially from a magnetizable material and can be moved between an operating position and an at-rest position, which squeegee device comprises a support frame for delimiting an operating space, inside which the operating position of the squeegee element is located, and magnetic means which are provided on the support frame for generating a magnetic field at the location of a designated bearing-wall part of the support frame in order to pull the squeegee element onto the bearing-wall part in the at-rest position, in which device switching means are provided, which interact with the magnetic means in order to apply the magnetic field at the location of the bearing-wall part in a switched-on position and to substantially eliminate the magnetic field at the location of the bearing-wall part in a switched-off position.

Abstract: An apparatus and method for decorating cylindrical articles using direct rotary screen printing of a UV radiation curable composition in various predetermined patterns and registrations. A rotary screen printing assembly is arranged in either a horizontal or vertical orientation to achieve production rates of about at least 250 articles per minute, and up to 1000 articles per minute. The UV radiation curable compositions are at least partially cured between a plurality of screen printing workstations using a UV radiation source.

Abstract: A stencil printing machine incorporating squeegee roller in printing drum having peripheral wall having ink-nonpermeable nonperforated portion around ink-permeable perforated portion for winding a stencil sheet and printing the print sheet while transferring the print sheet by sandwiching the print sheet between the printing drum and the outer roller, wherein projected portion is provided on the nonperforated portion constituting side of inner peripheral face of the peripheral wall, thickness of the nonperforated portion is formed thicker than thickness of the perforated portion and accordingly, press force exerted to the peripheral wall and the stencil sheet by being sandwiched by the squeegee roller and the outer roller is enhanced on the side of the nonperforated portion and therefore, spread of ink is stopped within range of the perforated portion and ink is prevented from leaking from gap between outer peripheral face of the nonperforated portion of the peripheral wall and the stencil sheet.

Abstract: A stencil printing machine 1 is provided with a stencil drum 16 and a opposite 17 which are a pair of cylindrical parts located with their external peripheral surfaces being close to each other, a stencil sheet 15 being detachably wound on the external peripheral surface of the stencil drum 16, and serves to perform stencil printing process by rotating the stencil drum 16 and the opposite 17 in order that the external peripheral surfaces thereof are located close to each other and moved in the same direction while the stencil sheet 15 is pressed against the opposite 17, and by making the stencil sheet 15 in contact under pressure with a sheet of paper 22 passing between the stencil drum 16 and the opposite 17 by the pressing force of the stencil drum 16. The stencil drum 16 is detachably mounted on the stencil printing machine and provided with storage units 201 to 203 for storing information about the pressing force of the stencil drum 16 against the opposite 17.

Abstract: A stencil printer includes an ink drum having a hollow cylindrical porous support and a pair of flanges supporting opposite ends of the support. Annular elastic members are respectively affixed between the inner periphery of the porous support and the outer circumferences of the flanges. When the ink drum is pressed against a press roller, the elastic members deform and cause an ink roller disposed in the ink drum to be displaced. As a result, the ink roller contacts the inner periphery of the porous support brought into contact with and positioned by the press roller. The ink roller and the inner periphery of the ink drum can therefore contact each other under uniform pressure without the rigidity of the drum being reduced and without any shaking.

Abstract: A magnet bar for exerting an attracting force on a doctor, which is arranged above the magnet bar, of a screen-printing or coating device comprises an elongate top plate and an elongate magnet carrier which extends below and substantially parallel to the top plate and on which permanent magnets are arranged next to one another in the longitudinal direction. The distance between the magnet carrier and the top plate can be adjusted by means of a displaceable adjustment member, which is arranged below the magnet carrier, in order to adjust the magnitude of the attracting force. The magnet carrier is supported freely on the adjustment member and the weight of the magnet carrier with magnets or the sum of the weight of the magnet carrier with magnets and the force of at least one spring acting upon the magnet carrier in downward direction is greater than the maximum attracting force which can be exerted by the magnets on a doctor which is arranged above the magnet bar.

Abstract: A stencil printer has a printing drum which has an ink-permeable peripheral wall around which a stencil master is wound and to the inner surface of which ink is supplied. The printing drum is rotated about its longitudinal axis. An internal press roller is disposed inside the printing drum and is rotated in contact with the inner surface of the peripheral wall of the printing drum. A paper pinch drum is disposed outside the printing drum and is pressed against the peripheral wall of the printing drum with a printing paper pinched between the pinching means and the stencil master wound around the peripheral wall. A retainer roller is disposed in a predetermined position near the internal press roller and the inner surface of the peripheral wall downstream of the contact line between the internal press roller and the inner surface of the peripheral wall in the direction of rotation of the printing drum.

Abstract: By preventing a deformation of printing drum of a rotary stencil printing apparatus caused at the time of printing, uniform printed images can be printed even under conditions such as low temperature and high-speed printing and even using an apparatus provided with a large-sized drum. That is, the invention provides a method for stencil printing which comprises winding a perforated stencil sheet around the peripheral wall of a cylindrical printing drum having an ink permeable peripheral wall and rotating around its central axis, supplying an ink to the peripheral wall from the inside of the drum at the time of rotation of the drum, and pressing a printing paper to the outer surface of the peripheral wall of the drum to transfer the ink to the printing paper through the stencil sheet, wherein the peripheral wall of the drum has such a strength that the peripheral wall shows a stress of 0.75 kgf/cm2 or more, preferably 1.4 kgf/cm2 or more when it is deformed by 0.

Abstract: A screen process printing method of performing solid printing on a printing substrate with a printing ink, using (a) a squeegee, (b) a screen pattern plate through which the printing ink is brushed or squeezed so as to form a solid ink transferred portion on the printing substrate by the squeegee which is in contact with the screen pattern plate, with the screen pattern plate coming into contact with the printing substrate and separating therefrom, (c) a back-up roller which is disposed so as to be directed to the screen pattern plate and the squeegee, and around which the printing substrate is wound, and (d) a gas ejection slit from which a gas is ejected, includes a step of ejecting the gas from the gas ejection slit toward a separate portion at which the printing substrate separates away from the screen pattern plate, thereby smoothing the surface of the solid ink transferred portion on the printing substrate, and a screen printing machine for carrying out this screen process printing method is provided.

Abstract: A rotary screen printing cylinder including a cylindrical screen, a squeegee disposed within the screen, and two end pieces each fastened as an extension of the cylindrical surface of the screen. The screen cylinder has at least two zones which are provided with color-permeable openings at least in partial areas and are separated by a color-impermeable dead zone of predetermined width. The dead zone is designed so as to give the screen cylinder stability.

Abstract: A stencil printing machine includes a printing drum having a flexible ink-permeable circumferential wall adapted to receive a perforated stencil sheet around an outer circumferential surface thereof, the printing drum being rotated around a central axis thereof; a squeegee roller having an axis and situated inside the printing drum to be parallel to the central axis of the printing drum, the squeegee roller being rotated around the axis in synchronization with rotation of the printing drum with an outer circumferential surface thereof contacting an inner circumferential surface of the printing drum; a pair of bearing members attached to end portions of the axis of the squeegee roller for rotationally supporting the axis; a doctor roller having an axis and situated parallel to the squeegee roller at a predetermined distance away from the outer circumferential surface of the squeegee roller; a pair of adjusting screws situated perpendicular to the axis of the squeegee roller and fixed to the pair of bearing mem

Abstract: A stencil printer or similar printer and an ink viscosity sensing device therefor are disclosed. The viscosity of ink which is the root cause of the degradation of image equality ascribable to, e.g., temperature and down time is directly sensed. The viscosity is combined with other information including a set print speed and the kind of the ink in order to effect delicate print pressure control matching the actual conditions of the printer. Stable image quality with a minimum of fluctuation is achievable against the varying environment and without resorting to complicated control pattern tables or a number of sensors.

Abstract: A printing apparatus is formed of a printing drum which is rotationally driven around a central axis of itself with a heatsensitive stencil sheet around an outer circumferential surface of itself, liquid ejecting device for forming an image from photothermal conversion material on the stencil sheet by ejecting a liquid containing the photothermal conversion material to the stencil sheet and for forming an image on a printing paper by ejecting a liquid containing a colorant and the photothermal conversion material, light radiating device for perforating the stencil sheet by radiating light to the stencil sheet with the photothermal conversion material on it, a pressing device for pressing the printing paper against the printing drum, the printing paper being supplied in synchronization with rotation of the printing drum, and for transferring an ink supplied to an inner spherical surface of the printing drum to the printing paper through the perforated stencil sheet, and control device for controlling diameters

Abstract: In the ink supply construction of a stencil printer, having an ink holding space 14 defined by an outer circumferential surface of an ink supply roller 4 and an ink supply control member 8, there is provided an ink interrupting member 30 as opposed to the ink supply control member across the ink holding space for restricting a side of the ink holding space opposite to the ink supply control member, in order to stabilize and highly uniformalize the cross sectional size of a rotating lump of ink L formed in the ink holding space along the length of the lump of ink. The lump of ink may be rotationally driven by an ink driving rod member 15 provided in the ink holding space. When the lump of ink is not rotationally driven by the ink driving rod member, the ink interrupting member may be constructed to rotationally drive the lump of ink.

Abstract: A doctor arrangement is located inside a rotary cylindrical screen for applying a substance to a moving web that is adjacent the rotary screen. The doctor is supported on a carrier beam that is mounted within the rotary screen. The substance is applied through the rotary screen onto the moving application surface with the doctor, which may be a roll doctor or doctor blade. The carrier beam is slidable along a longitudinal axis of the rotary screen into and out of the rotary screen through a through hole in a bearing of the rotary screen at one end of the apparatus. The carrier beam has guide rails that slide along guide rolls mounted outside the width of the application surface on bearings that the rotary screen. The carrier beam and doctor arrangement can be inserted and withdrawn from the rotary screen with the carrier beam in an elevated position wherein the doctor does not interfere with the rotary screen member.

Abstract: An installation for coating the surface of a web of material with a paste. A printing screen has a doctor blade lying within for applying the print paste through holes in the printing screen onto the web. A counter roll cooperates with an electromagnet to producing a controllable level of contact pressure of the doctor blade against the printing screen. The roll body of the counter roll is provided with a coating that has piezoelectric elements and is divided into sections specific to the width, each section being individually controllable. This permits dynamic control of the application of paste over the width of the web.

Abstract: A squeegee blade comprising a base metal core coated with titanium nitride. Preferably, the blade also comprises a nickel coating between the base metal and the titanium nitride. The core blade is provided with an edge with a desired radius of curvature by chemical milling, and then the whole blade is chemically polished or electropolished and optionally nickel plated to produce a very smooth finish. The blade is then coated with titanium nitride to produce a blade with an extremely hard, low-friction surface. A squeegee incorporating the blade can be used, for example, for screen printing solder paste, conductive epoxy, or the like onto printed circuit boards.

Abstract: A stencil printer of the present invention is selectively operable in a simplex print mode or a duplex print mode and includes two drums. The drums each has a respective master support on its circumferential surface. The master supports of the two drums are movable into and out of contact with each other without the distance between the shafts of the drums being changed. In the duplex print mode, the master supports contact each other with the intermediary of a paper so as to print images on both sides of the paper at the same time. The printer obviates noise and insures high image quality.

Abstract: An apparatus for dispensing solder paste for application through a stencil or a screen to a circuit board includes a housing having an elongated chamber along a longitudinal axis and a rotatable member within the chamber. The housing has an inlet connected to a supply of solder paste and an elongated opening at the bottom of the chamber for delivering solder paste from the chamber. The rotatable member creates a pressure gradient within the chamber and causes delivery of the solder paste through the opening at controlled pressure. The rotatable member is spaced from an inner surface of the housing defining the chamber. The axis of rotation of the rotatable member is movable in two directions and the speed of rotation is adjustable. The forces on the rotating member are monitored in order to monitor solder conditions.

Abstract: A stencil printing drum includes a cylindrical circumferential wall which includes an ink permeable area and an ink impermeable area surrounding the ink permeable area. The wall is wrapped with a perforated stencil sheet and driven to rotate around a central axis of itself. The drum also includes an ink supply roller provided inside the wall for supplying ink to an inner surface of the wall. The roller presses ink outwardly from the ink permeable area to pass through a perforated area of the stencil sheet wrapped around the wall for printing. The drum also includes an ink impermeable projection. The projection is provided on a rear end portion of the ink permeable area in a rotating direction of the wall along one of the generatrices of the cylindrical wall. The projection projects inside the cylindrical wall, thereby dividing the ink permeable area and the ink impermeable area.

Abstract: A method of printing a document image on a paper by wrapping a stencil, or master, perforated by, for example, a thermal head around a print drum, and a stencil printer. A wedge effect occurs between the print drum and an ink roller disposed in the print drum. The wedge effect, coupled with the pressure of a pressing member, causes ink to exude from the inner periphery to the outer periphery of the print drum and further from the master to the paper. The paper is separated from the master at a position downstream, with respect to the direction of rotation of the print drum, of a portion where the ink exudes due to the wedge effect. At the paper separating position, the ink does not exude from the master, and the ink pressure does not act. This obviates the blur of a printed image and prevents the ink from being transferred from the front of an underlying printing sheet to the rear of an overlying printing sheet stacked on the underlying sheet due to excessive ink transfer.

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 stencil printer of the present invention is selectively operable in a simplex print mode or a duplex print mode and includes two drums. The drums each has a respective master support on its circumferential surface. The master supports of the two drums are movable into and out of contact with each other without the distance between the shafts of the drums being changed. In the duplex print mode, the master supports contact each other with the intermediary of a paper so as to print images on both sides of the paper at the same time. The printer obviates noise and insures high image quality.

Abstract: A template and an application device of an apparatus for application of a substance to a fabric train are cleaned either in situ within the application apparatus or after being withdrawn as a unit and supported in a separate washing device. Cleaning fluid is supplied to the application device at an inlet thereof that is the same that receives substance to be applied to the fabric train. The cleaning fluid is discharged from the application device through a plurality of discharge holes having respective discharge axes. The discharge holes are arranged with the discharge axes extending parallel to each other and spaced in a direction parallel to the template at intervals of 5-20 mm between adjacent axes. The discharge holes are spaced from the template such that the substance or cleaning fluid passes from the discharge holes directly to the template. The discharge holes have a total cross sectional area that is at least twice a cross sectional area of the inlet to the application device.

Abstract: A rotary coater device (12) is provided, comprising front and rear frame plates (30) having mounted therebetween: a die bracket assembly (100), a screen assembly (200), a heater hood assembly (300), and an impression roll assembly (400). The die bracket assembly (100) includes (i) a die (500) positionable within a screen (202) and having an opening (550), the die being movable from an operating position wherein the die opening is proximate to an inner surface of the screen to an idle position wherein the die is drawn away from the inner surface; and (ii) a pivotable support arm (102a) fixedly attached at one end to a positioning mechanism (112) and removably attached at an opposite end to the die, the pivotable support arm being pivotable away from the screen when the opposite end is detached from the die to expose the screen for removal from the coater device.

Abstract: A multi-blade screen printing arrangement provides a control mechanism for positoning of squeegees for effecting variable width screen printing with interchangeable squeegee blades. Further, a comprehensive printing material processing portion includes various arrangements for carrying out agitation of a printing material within a cylindrical chamber which may be readily mounted within the control mechanism. Further, the movable squeegee control and the suspended housing of the control mechanism allow for continuous adjustment of printing pressure, resetting of printing operations and flow control according to a desired printing thickness.

Abstract: A squeegee assembly for a screen printing machine is provided comprising a squeegee body formed of a resilient material and an attached thin flexible polished metal plate, said plate attached to and supported by a front face of said squeegee body in a linear manner, a bottom end of said flexible plate projecting from a bottom end of said squeegee body, and support means supporting said squeegee body and attached flexible plate in an inclination angle of 60.degree..about.70.degree. relative to a direction of movement of said squeegee.

Abstract: A flexible metal squeegee blade (500) includes a plurality of grooved portions (502) etched on a rectangular metal blade plane (504) to provide for greater flexibility at the grooved portions (502) of the blade.

Abstract: Squeegee assembly in particular intended for coating substantially cylindrical objects with a liquid or pasty material, at least comprising an annular squeegee with an outer mounting edge and an inner levelling edge, the latter comprising a ring member and/or ridges substantially extending in the intended direction of movement of the squeegee, the ridges defining grooves, which grooves are designed to form channels with the surface of the object to be coated.

Abstract: A hot melt material coating system (10) is provided, comprising (i) a rotary coater (12) driven by a motor (604); (ii) a rotary coater position, speed and direction indicator (610) operatively connected to the rotary coater and providing a signal representing the position, speed and direction thereof; (iii) a web position, speed and direction indicator (612) operatively connected to the web and providing a signal representing the position, speed and direction thereof; and (iv) a control system (600).

Abstract: In a stencil printer, a drum support structure has a drum unit including a handle. The handle can be raised when released from a drum support member mounted on the printer or can be folded down when coupled with the drum support member. Therefore, the structure miniaturizes the printer with a simple configuration. Further, the structure allows a drum of the drum unit to move stably when the drum unit is moved into and out of the printer, thereby protecting a master wrapped around the drum from damage.

Abstract: In a stencil printer having a printing drum 10 which has a circumferential wall portion for mounting a stencil sheet made of a flexible sheet member 20 and including a perforated portion 20c, an inking roller 12 provided inside of the printing drum for supplying ink to the printing drum from its inside, and a back press roller 14 for supporting a print sheet against the printing drum by holding a leading end of the print sheet by clamps 25, a strip of elastic sheet 52 is provided to prevent ink leakage from the perforated portion 20c of the printing drum due to insufficient support of the print sheet by the back press roller at the portion of the clamps 25.

Abstract: A stencil printing screen body includes an ink-previous printing area, an ink-impervious non-printing area provided around the printing area, and a pressure sensitive adhesive area formed on the surface where the stencil sheet of non-printing area is attached and having adhesion to the stencil sheet. The stencil printing body is wrapped in a cylindrical form on peripheral surfaces of annular members, and a squeeze member is provided in the screen body for supplying ink. The stencil sheet is applied onto the screen body without leaking ink.

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: A stencil printer having a printing drum which is inked from the inside thereof. In order to prevent leaking out of ink from the perforated portion over the non-perforated stencil sheet leading end mounting portion of the stencil printing drum, in a construction wherein a printing drum cooperates with a back press roller or a transfer roller with a transverse bar portion of the printing drum is received in a transfer groove of the back press roller or the transfer roller, the outer circumferential length of the perforated portion of the printing drum and the traverse groove of the back press roller or the transfer roller and the relative rotation phase therebetween are so determined that the perforated portion is not laid one over the other with the transfer groove.

Abstract: In a stencil printer having a printing drum 10 which has a circumferential wall portion for mounting a stencil sheet made of a flexible sheet member 20 and including a perforated portion 20c, an inking roller 12 provided inside of the printing drum for supplying ink to the printing drum from its inside with radially shifting out the perforated portion, and a back press roller 14 for supporting a print sheet against the printing drum by holding a leading end of the print sheet by a clamp 25, a means is provided for restricting the radial shifting out of the inking roller 12 when the inking roller is opposed by the clamp 25 to prevent ink leakage from the perforated portion 20c of the printing drum due to insufficient support of the print sheet by the back press roller 14 at the portion of the clamp 25. As an embodiment, an annular cam follower 23 mounted on the inking roller 12 is engaged by a cam 48 mounted on the back press roller.

Abstract: An apparatus for spreading and depositing a viscous liquid or paste-like material on a substrate includes a housing removably insertable into a diamond- or square-shaped squeegee blade holder, the blade holder itself mounted to a squeegee head assembly of a screen or stencil printer. The squeegee head assembly is driven in a linear direction over and above the substrate, dragging the blade over the substrate and forcing deposition of the material onto the substrate. The housing includes a pair of oppositely-disposed locking clamps that attach to both ends of the housing. A shaft having a blade secured thereto is disposed through the channels of the clamps and within a groove of the housing, and the shaft is rotatable within the housing and the locking clamps so that the angle of attack between the blade and substrate can be selectively adjusted and, once the appropriate angle of application is selected, the blade is fixed in position by tightening the clamps against the shaft.

Abstract: An ink supply device for a printing apparatus, the ink supply device being positioned within a porous cylindrical drum and including: a frame body having side plates confronting each other; an ink supply roller supported between the side plates by the frame body, a lower portion of the ink supply roller coming in contact with an inner circumferential surface of the cylindrical drum, and the ink supply roller being rotatable about a central axis thereof and in synchronism with the rotation of the cylindrical drum; an ink amount control member supported between the plates by the frame body, and having a predetermined gap with respect to an outer circumferential surface of the ink supply roller while extending along one generatrix of the ink supply roller, wherein the ink amount control member, the ink supply roller and the side plates cooperate to form a space in which ink is pooled; a rodlike member supported between the side plates by the frame body and extending within the space where ink is pooled along the

Abstract: A rotary coater device (12) is provided, comprising front and rear frame plates (30) having mounted therebetween: a die bracket assembly (100), a screen assembly (200), a heater hood assembly (300), and an impression roll assembly (400). The die bracket assembly (100) includes (i) a die (500) positionable within a screen (202) and having an opening (550), the die being movable from an operating position wherein the die opening is proximate to an inner surface of the screen to an idle position wherein the die is drawn away from the inner surface; and (ii) a pivotable support arm (102a) fixedly attached at one end to a positioning mechanism (112) and removably attached at an opposite end to the die, the pivotable support arm being pivotable away from the screen when the opposite end is detached from the die to expose the screen for removal from the coater device.

Abstract: Squeegee assembly in particular intended for coating substantially cylindrical objects with a liquid or pasty material, at least comprising an annular squeegee with an outer mounting edge and an inner levelling edge, the latter comprising a ring member and/or ridges substantially extending in the intended direction of movement of the squeegee, the ridges defining grooves, which grooves are designed to form channels with the surface of the object to be coated.

Abstract: Strap-like step portions each having a smaller external diameter than the external diameter of an ink supply roller are provided at opposite ends of the ink supply roller provided in a drum. Guide surfaces of ink dams urged by springs are brought into contact with the strap-like step portions respectively. Inclined surfaces of the ink dams are brought into contact with the strap-like step portions and side end surfaces of the strap-like step portions respectively. Ink leaked onto the strap-like step portions is led to the inclined surfaces in conjunction with the rotation of the ink supply roller and returned to the inner side of the ink supply roller. Ink is prevented from being leaked out of the ink supply range of the ink supply roller, so that a printing apparatus and sheets of printing paper are not stained with ink. The state of contact between the ink dams and the ink supply roller is kept stable. If the elastic force of the springs is changed, the state of contact can be changed.

Abstract: A stencil printing drum comprises: a rotary cylindrical drum including an ink non-passage region, an ink passage region surrounded by the ink non-passage region, and an axis around which the rotary cylindrical drum rotates; an ink supplying roller whose axis of rotation is in parallel with the axis of the rotary cylindrical drum, the ink supplying roller being brought into contact with the inner cylindrical surface of the rotary cylindrical drum to push a printing ink out of the rotary cylindrical drum through the ink passage region; and an ink non-passage strip formed along the border between the ink non-passage region and the ink passage region except the start end portion thereof as viewed in the direction of rotation of the rotary cylindrical drum, in such a manner that the ink non-passage strip protrudes radially inwardly of the rotary cylindrical drum.

Abstract: The rotation of the inner press roller 16 is synchronized with the rotation of the printing drum 10 by the gear train including a gear wheel 22 coaxial with the printing drum, a gear wheel 24 meshing with the gear wheel 22 and rotatably supported by an arm 26 swingable about the central axis of the printing drum, and a gear wheel 28 meshing with the gear wheel 24 and coaxially connected with the inner press roller 16 to rotate therewith and rotatably supported by an arm 18 swingable about a pivot axis Ob parallel with and distant from the central axis Oa of the printing drum. A clutch 86 is provided to apply a torque from the printing drum when driven to the arm 26 to control the biasing out operation of the inner press roller 12 against the circumferential wall 12 of the printing drum. The clutch may be replaced by the linear actuator 96. The clutch or linear actuator may be temporarily actuated stronger during a starting up of the printing operation.

Abstract: The rotation of the inner press roller 16 is synchronized with the rotation of the printing drum 10 by the gear train including a gear wheel 22 coaxial with the printing drum, a gear wheel 24 meshing with the gear wheel 22 and rotatably supported by an arm 26 swingable about the central axis of the printing drum, and a gear wheel 28 meshing with the gear wheel 24 and coaxially connected with the inner press roller 16 to rotate therewith and rotatably supported by an arm 18 swingable about a pivot axis Ob parallel with and distant from the central axis Oa of the printing drum. In the gear train, a brake 86 or 90 is provided for braking the gear wheel 28 or 24 to control the biasing out operation of the inner press roller 12 against the circumferential wall 12 of the printing drum. The braking action may be temporarily increased during a starting up of the printing operation. The distance between the axes of the gear wheels 24 and 28 may desirably be restricted not to increase beyond a predetermined distance.

Abstract: A stencil printing machine comprises: a rotary cylindrical drum having an ink passage part; an ink supplying roller rotatable around an axis in parallel with the central axis of the rotary cylindrical drum, the ink supplying roller being brought into contact with the inner cylindrical surface of the rotary cylindrical drum; a pair of cylindrical protrusions on both ends of the ink supplying roller, the cylindrical protrusions being smaller in outside diameter than the ink supplying roller and coaxial with the ink supplying roller; an ink coating roller arranged in parallel with the ink supplying roller, the ink coating roller applying ink onto the surface of the ink supplying roller in accordance with the ink supplying roller turning, an ink pool forming between the ink coating roller and the ink supplying roller; and a pair of ink banks are provided at both ends of the ink pool, respectively, the ink banks having sloped surfaces in contact with the cylindrical surfaces of the cylindrical protrusions, the slo

Abstract: A hot melt material coating system (10) is provided, comprising (i) a rotary coater (12) driven by a motor (604); (ii) a rotary coater position, speed and direction indicator (610) operatively connected to the rotary coater and providing a signal representing the position, speed and direction thereof; (iii) a web position, speed and direction indicator (612) operatively connected to the web and providing a signal representing the position, speed and direction thereof; and (iv) a control system (600).

Abstract: A printer system for printing a given pattern on a base board is described which comprises 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 squeezing device. The ink squeezing device runs on the screen plate pressing the same against the base board while squeezing 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 printing drum for a rotary stencil printer having a sidewall in the form of a flexible perforated sheet. In order to allow for a bulging out deformation of the sidewall by an internal press roller to be easier and more uniform over the entire width of the printing, the flexible cylindrical body of the printing drum has its opposite side edge portions seated around the outer circumferential surfaces of a pair of annular portions (10a, 10b). The drum is constructed to have an inner circumferential length greater than the circumferential length of the outer circumferential surface of the annular portions by a predetermined amount which allows for a predetermined bulging out deformation of the flexible cylindrical body.

Abstract: A rotary stencil printing machine is formed of a cylindrical member, a clamping device formed on the cylindrical member for clamping a leading edge portion of a stencil sheet, and a back-up device provided outside the cylindrical member. The back-up device grips a printing sheet together with the cylindrical member to transfer the same. The cylindrical member includes a cylindrical peripheral surface for mounting thereon the stencil sheet; a first ink-pervious area formed on the peripheral surface on which an image forming area of the stencil sheet is disposed; at least one second ink-pervious area formed on the peripheral surface on which a trailing edge portion of the stencil sheet is disposed; and at least two first ink-impervious areas formed on the peripheral surface. The second ink-pervious area has an elongated shape continuously extending parallel to a center axis of the cylindrical member, and the ink-impervious areas sandwiches the second ink-pervious area.