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: Apparatus is provided for applying glue or a similar adhesive onto a substrate such as a paper web. It comprises a nozzle plate (20) with exit openings (29) with a small diameter, which are arranged in at least two rows (32,33), staggered closely behind one another in the transport direction (4). The rows are also transversely offset with respect to each other such that the outlet openings of one row (33) are aligned with the spaces (37) defined between the outlet openings of another row (32). In this manner, side edge portions (47) of the adhesive issued from the outlet openings of the one row (33) contact and merge with the side edge portions (47) of the adhesive issued from the outlet openings of the other row (32) whereby a continuum of adhesive is produced.

Abstract: A process is provided for forming a conductive line between a conductor and a spacer formed on a substrate of a field emission display. In one embodiment, the process performs the steps of disposing a screen between the substrate and a distributing member, the screen having an opening which permits the extrusion a conductive material, and moving the distributing member relative to the screen to extrude the conductive material through the opening and form a conductive line connecting the conductor and the spacer, wherein the snap off distance is varied according as the distributing member moves along the substrate.

Abstract: An apparatus for transferring and spreading a high-viscosity bonding agent to a thickness of about 10 .mu.m on a bonding-agent onto a member. The device includes a squeegee table on which a bonding agent is spread, and a film moving device for feeding a film made of elastic material from one end to the other end of the squeegee table at a predetermined speed and sticking the film onto the bonding agent. The film moving device then peels the film off the spreading side at a speed at which the upper half of the bonding agent layer is peeled off from the other end of the squeegee table, whereby the thickness of the bonding agent is reduced to half of that which has been spread on the squeegee table. The film moving device then feeds the film having the bonding agent onto a member and peels off the film from the member, thereby transferring a bonding agent having a thickness of about 1/4 of the thickness of the bonding agent spread on the spreading side, not greater than 10 .mu.m, for example, to the member.

Abstract: This invention describes a process and an apparatus for the raster-formed coating of web-shaped flexible flat articles (3) with hot-melt adhesives in a screen printing process by filling all perforations of a rotary screen printing stencil (1) by means of an outer blade (6) with a solution or dispersion of a paste (2), by placing the flat article (2) on the rotary screen printing stencil (1) and by subsequently additionally applying a paste (5) by means of an inner blade (4). On the finished product, paste (2) produces a plastic base layer which is not or only slightly capable of thermal activation and paste (5) produces a hot-melt adhesive top layer which is easily capable of being thermally activated. Following the drying and sintering of the double-layered printed flat article (8), it can be used as an attachable inlay material for items of clothing.

Abstract: A screen printing machine comprising a backing plate with holes conforming to components attached to the surface of a flexible circuit board. The machine includes a screen which patterns solder paste on the surface of the circuit board while the circuit board is on the backing plate. Also included is a spring loaded element disposed adjacent to the backing plate which applies a predetermined continuous force to the four corners of the circuit board. This force is applied in a diagonal direction to the corners to stretch the circuit board so that the circuit board is parallel to the backing plate during screening.

Abstract: A solder paste stencil printing apparatus in which a stencil plate having a porous figure printing area may be used for single component solder paste application. The printing operation is performed by alignment of the stencil pattern figure over the appropriate component substrate pads. With the stencil plate being held in place by downward force, solder paste is dispensed over the stencil plate pattern allowing gravity flow of the paste material into the stencil pattern pores. Excess paste material is squeegeed level to the top surface of the stencil plate and the plate lifted from the substrate surface leaving solder paste in the configured pattern. An associated stencil plate holder matched to the printer head shaft allows any number of stencil plate patterns to be made available for solder paste application.

Abstract: A method of holding and transporting a hollow flexible belt throughout a coating process. The method includes placing an expandable insert into the hollow portion of a seamless flexible belt, and expanding the insert until it forms a chucking device with a protrusion on at least one end. A mechanical handling device is then attached to the protrusion, and will be used to move the chuck and the belt through the dipping process, as materials needed to produce a photosensitive device are deposited onto the surface of the belt, allowing it to be transformed into an organic photoreceptor. The chucking device and flexible belt are then removed from the mechanical handling device, the belt is cut to the desired width, and the chuck is removed from the inside of the photoreceptor.

Abstract: System for producing a plurality of semiconductor device assemblies utilizing a grid array of conductive epoxy for connecting them to an electronic system. Conductive epoxy is screen printed in a desired pattern onto a printed wire board of the semiconductor device assembly. The conductive epoxy is B-staged by heating in an oven. The semiconductor device assembly is then placed onto a system printed circuit board wherein the B-staged conductive epoxy is further cured by heat and effectively makes mechanical and electrical connections between the semiconductor device assembly and the system printed circuit board.

Abstract: An method and apparatus for forming adhesive and solder pads on a printed circuit board to surface mount electrical components to the board. In accordance with an embodiment of the invention, a solder paste is deposited onto the printed circuit board through a first stencil that has a plurality of first openings. The solder paste forms a plurality of solder pads on the board. A second stencil is then positioned on the printed circuit board. The second stencil has a plurality of second openings, and a recess in its bottom face configured to receive the plurality of solder pads. After the second stencil is positioned on the printed circuit board so that the solder pads are received in the recess on the bottom face of the second stencil, an adhesive material is deposited onto the board through the second openings of the second stencil to form a plurality of adhesive pads on the board.

Abstract: This invention provides for methods and apparatus for increasing the speed of material deposition by a blade element traversing across an apertured mask. The invention involves varying the velocity of the blade element as it sweeps across different sections of the apertured mask. Varying the sweep velocity of the blade element allows for increases in the average speed of material deposition while retaining precision in the application of material deposited through the apertured mask.

Abstract: A stencil printing apparatus (100) is provided for printing a solder paste (108), through apertures (104) in a stencil (102), onto metallized portions of a printed circuit substrate (106). The printing apparatus contains a laser surface profiling device (114) which is used to produce 2- and 3-dimensional profiles of a portion of the surface of solder paste adjacent to a squeegee (110). Data is processed and sent to a controller (118) which is coupled to a solder paste dispenser (112). The controller automatically signals the dispenser (112) to dispense additional solder paste at deficient locations as needed.

Abstract: In a method of coating a curved panel in a cathode ray tube, by placing on the inner surface of a panel having a curved surface a screen frame of a boat-shaped configuration across the bottom of which a screen printing screen is stretched; and by moving a squeegee pushed against the surface of the screen so that ink coated on the surface of the screen passes through the screen and prints on the inner surface of the panel, a fluorescent screen having a good and even film is fabricated on the inner surface of the cathode ray tube panel having a curved face, by a screen printing. In the method, electro-conductive terminals for electro-deposition are not required, steps are reduced, production costs are reduced, and production quality is stabilized.

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 device and method for decorating an object such as an egg, which has a perimeter surface. The device includes a resilient band adapted for placement about the perimeter of the object to be decorated, the resilient band having a surface and at least one prominent, resilient area for masking. The resilient area for masking is mounted against the surface of the resilient band, so that the resilient band may be placed about the perimeter surface of the object, so that the resilient band will bias the resilient area for masking against the perimeter surface, so that the perimeter surface of the object may be immersed in a colorant, and thereby producing an image on the perimeter surface of the object by preventing colorant to reach the perimeter surface. The method includes providing a resilient band with prominent areas for masking.

Abstract: A stencil for applying solder paste in a desired pattern for mounting electronic components on a surface of a circuit board, said stencil including a sheet having holes therethrough in a pattern corresponding to the desired pattern, a smooth upper surface for receiving the solder paste thereon, and a smooth lower surface for contacting the surface of the circuit board, the upper surface having relieved portions so as to increase the friction between the upper surface and the solder paste being squeegeed thereover.

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: 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 novel method of applying paints and other coatings is disclosed which can be carried out by forcibly inserting a cloud of coating particles carried by at least one inert gas into a laser beam attenuated by defocusing. At least one of the inert gases serves as a shield against combustion and can be directed downwardly in addition to a sideway spreading and spraying action. The pressure of the inert gas pushes the particles down onto the substrate. As soon as the particles are energized by the laser beam, they melt and begin to flow while at that exact instant, the coating particles come into contact with the substrate to avoid any possible dissipation of the laser energy. The coating material compositions can be altered by increasing the melting time of the particles even though a short melting time is preferred for achieving a fast coating process.

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 the manufacture of multi-layer ceramic interconnect structures, a greensheet is perforated with small holes and positioned on the support fixture of a screening machine. Then a planar surface of a screening mask is positioned in relation to the greensheet for producing the circuit pattern. Then the discharge end of a paste nozzle is positioned in relation to the opposite planer surface of the mask for injecting pressurized conductive paste through the nozzle into the mask. A normal force is applied to the nozzle toward the mask to maintain the discharge end of the nozzle with a clearance of 1 to 2 mils from the mask as the nozzle traverses the mask, injecting the conductive paste to extrude the circuit pattern on the greensheet and fill the perforations to produce vias to provide electrical connections between the layers produced. The force is adjusted dependent upon the pressure of the paste being injected into the mask to maintain the 1 to 2 mil clearance.

Abstract: This invention improves a machine that has a squeegee-like blade that wipes across an apertured mask to apply to a printed circuit board solder paste or other conductive mounting material. The apparatus and method of the invention involve reciprocating the blade back and forth transverse to the direction of blade sweep across the mask, during the material-applying sweep of the blade across the mask. The reciprocating movement of the blade, combined with the sweep movement, deposits material onto the printed circuit board with high fidelity and with minimal voids.

Abstract: A non photographic method for making patterns in organic films comprising the sequential step:a) applying in predetermined pattern an imaging layer comprising an agent which is capable of changing the solubility of a solid organic polymer in at least one unpatterned layer laying in contact with solid imaging layer to form the compiled body on a substrate by screen printing with a screen having a plurality of apertures of polygon of which each side is recessed,b) drying the unpatterned layer fully or partially at a predetermined temperature to diffuse said solubility change agent from the imaging layer to the unpatterned dielectric layer(s) andc) removing the patterned imaging layer and the diffusion patterned areas of the unpatterned layer(s) which are both soluble in a predetermined eluant, by washing said compiled body with the predetermined eluant.

Abstract: An apparatus and method for applying a coating to glass including a support surface for supporting a glass pane, a print screen having a screen support frame defining a perimeter of the print screen disposed above the support surface to apply a coating over the print screen. The print screen is deflected into contact with the glass pane at predetermined points thereon and the coating is moved over the print screen to deposit the coating on the predetermined points on the glass pane when the print screen is so deflected. The apparatus also includes a vapor manifold having a predetermined width disposed within the perimeter defined by the screen support frame and coupled to a source of vapor. The vapor manifold distributes a vapor blanket over the print screen and the glass pane, thereby reducing the rate at which the coating on the glass pane dries and impede evaporation of the coating from the print screen.

Abstract: A method for the formation of a layer on at least one substrate. A liquid, which contains the material for forming the layer, flows over the surface of the substrate of the substrate to be coated. A concentration gradient of the layer-forming material is produced in a direction, perpendicular to the direction of the flow of the liquid. As a result, the concentration of the layer-forming material becomes a maximum at one side of the liquid.

Abstract: A method of applying bonding agents, such as solder pastes and conductive adhesives, to pad sites in the manufacture of electronic circuits uses a bonding agent injection head which includes a wiping guide, a blade which cooperates with the wiping guide to form an elongate nozzle slit, and an evacuation path ahead of the nozzle slit in a direction of movement of the injection head. A permanent mask with cavity openings is applied around conductive pads on a carrier. The conductive pads correspond to chip attachment sites. The injection head is brought into contact with a surface of the mask, and pressure is applied to a bonding agent in the injection head. The injection head is then moved over the surface of the mask, filling cavity openings with the bonding agent. The evacuation path ahead of the nozzle slit lets air out of the cavity openings as the cavity openings are filled with bonding agent. The injection head is then removed from the surface of the mask.

Abstract: A paint masking kit for windows and a method of masking windows prior to painting. The paint masking kit for windows includes a container having a plurality of reusable window balance covers having predetermined sizes and shapes for covering a header and balance portions of a window and a predetermined amount of a plastic sheet material for covering the glass portions of the window. The method of paint masking a window, having an upper and lower sash portion, a header and balances, includes raising the lower sash portion to expose the lower half of the balances. The reusable window balance covers are then secured to the exposed lower balance portions, and the lower sash portion is lowered over the window balance covers. Next, the upper sash portion is lowered to expose the header and the upper half of the balances. Reusable window balance covers are secured to the exposed header and balance portions, and the upper sash portion is raised over the window balance covers.

Abstract: Stencils having enhanced wear-resistance consisting of a metal body, preferably fabricated from stainless steel, having a first major surface and a second major surface and a plurality of apertures extending through the metal body from the first major surface to the second major surface, and a diamond coating which is preferably applied to at least the top surface of the metal body, and to the side walls of the plurality of apertures. Such stencils are particularly useful for positioning solder paste in predetermined areas on contact pads of printing wiring boards. The diamond coating is preferably deposited on the stencil surfaces from a vapor phase of carbon-containing gases. By applying the diamond coating to the top and side wall surfaces of the stencil, improved wear-resistance is achieved, resulting in increased service life for the stencils.

Abstract: An apparatus for facilitating wave solder treatment and other handling of a circuit component during manufacture of the circuit component having first areas configured for wave solder treatment and second areas not configured for wave solder treatment. The apparatus comprises a substantially rigid frame generally symmetrical about a plane and defining an opening which traverses the frame intermediate a first side and a second side. The apparatus further comprises a masking member affixed to the frame and defining a plurality of apertures traversing the masking member to the opening in the frame. The apparatus also comprises a holding device for holding the circuit component in an operational location in fixed relation with the masking member and with the frame during wave solder treatment. Each of the first areas of the circuit component is substantially in register with an aperture of the masking member when the circuit component is in the operational location.

Abstract: An apparatus for use in depositing and staining cytological material on a microscope slide has an elongated hollow tube, a base member, at least one flange, and a base plate. The base member is attached to the bottom end of the tube and projects outwardly from the tube perpendicular to the longitudinal axis of the tube. At least one flange is connected to the base member and outwardly-extends from the base member perpendicular to the longitudinal axis of the tube. The base member has a recessed area configured to receive the microscope slide, and slots configured and dimensioned to receive the flange. A passage in the base plate extends from each slot to releasably secure the respective flange when the tube is rotated. As designed, this apparatus advantageously allows individual staining of a slide, thereby preventing false-positive results due to floater cells which can translocate between slides in a common bath.

Abstract: In the case of an apparatus for coating a substrate with a substance, in particular a film with an adhesive, the substance is applied by means of a feeding head (4) through perforations (5) of a template (2) to the substrate in interaction with a backing roll (3) or the like within a coating nip (8). In this arrangement, the backing roll (3) has a screening cover (7) with holes (12). A radially aligned suction stream is generated in the backing roll in a region in and/or after the coating nip (8).

Abstract: Disclosed is a screen printing apparatus for filling minute through-holes in a board with conductive paste or the like by screen printing. When screen printing is performed with this screen printing apparatus, the board is placed on a stage through the intermediation of a film which is supplied to the stage by means of adhesive pads. The adhesive pads are brought into contact with the uppermost one of a plurality of stacked films to catch it by adhesion and then transfer the film to a position above the stage. Films are caught one after another by adhesion.

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

Abstract: An apparatus for continuously applying a liquid to a web has a nozzle having an elongated opening and directed at the web, a strip slidable steplessly along the opening of the nozzle to vary the length thereof, and a foraminous transfer screen displaceable transversely between the web and the nozzle opening and having a back face turned toward the nozzle and a front face turned toward the web. Back and front troughs engage the respective faces of the screen and define therewith back and front chambers while respective back and front steplessly displaceable pistons in each of the troughs engage the respective screen faces and each define an end wall for the respective chamber. The chambers are filled with a treatment liquid so that the liquid will wet the respective face of the screen over an area determined by the position of the pistons and a gas is supplied to the nozzle to blow the gas through the nozzle opening and through the screen and thereby transfer liquid carried by the screen to the web.

Abstract: The coating of the cylindrical periphery of engine pistons with coating compound, in particular low friction materials, is performed by means of screen printing. The pistons can be coated in the vertical position around their vertical central longitudinal axis as they rotate past a screen printing stencil.

Abstract: A method and apparatus for processing green-tape type circuits, whereby through contacts and electrical circuits are obtained on a thin foil of alumina in the raw state or another analogous or like material containing reference holes or marks (29) and connecting micro-holes (30) by means of a printing process with a conductive material, the green-tape foils being able to arrive from a wound roll of basic material or from a stock of already cut foils, in which method a green-tape foil (10) complete with through connecting holes (30) and reference holes or marks (29) is positioned on a conveyor belt (12) comprising at lest specific zones of transpirable material (3) and loaded with the green-tape foil (10), which is identified as a position in relation to the belt (12), is then printed after reciprocal positioning with a printing means, is dried and discharged, the apparatus comprising at least one loading station (13), a station (15) to identify the position of the green-tape foil (10), a printing station (18)

Abstract: A tool for guiding filler material, such as caulking or putty, into a nail hole or similar opening in a structure so that a smooth, unblemished finished surface may be obtained. The tool comprises a thin plate having a plurality of holes therethrough, the holes being of different diameters; and a handle attached to one end of the plate. In use, the plate is positioned so that a hole in the plate is aligned with a nail hole and filler material is urged through the hole in the plate to fill the nail hole. The handle is oriented at a low angle in relation to the plate so that the user may rest his hand on the structure to steady the tool while guiding filler material into an opening. The holes are of different diameter to provide a hole which may be of substantially the same diameter as the nail hole being filled. The holes are perpendicular to a tangential surface have a wider diameter at the bottom of the plate than at the top of the plate.

Abstract: A process for applying a pattern in a contrasting color to textile articles such as socks consists of entering the textile article onto an expandable article support (29), bringing a perforated pattern (38) over the article on the support, causing the support (29) to expand to press the textile article against the interior of the pattern (38), and applying typically by spraying a coloring agent onto the article through the pattern. The support (29) is subsequently contracted and the pattern (38) and then the textile article which a corresponding design has been printed, removed. Apparatus for applying a single color or multicolor pattern to articles such as socks has a carousel (23) carrying a multiple number of article supports (29). The carousel (23) rotates with a stepped movement between printing stations (54).

Abstract: Damage to the pins and ceramic body of pin grid array type semiconductor device assemblies is avoided by providing ceramic bushings in the pin-receiving holes of a boat transport. The bushings elevate the package body above the platform surface of the boat, and also alleviate problems associated with unequal thermal expansion of the metal boat and the ceramic package. In an alternate embodiment, a ceramic insert formed as a square ring encompassing an area roughly equivalent to the area of the package body is provided with holes for receiving the pins, and the boat transport has a cavity for receiving and retaining the ceramic insert.

Abstract: A portable automatic silk screen printer including a frame (24) supporting a transport device (26) which selectively moves a printing head (28) which is programmed to control the flood and squeegee bars (56, 58).

Abstract: Apparatus for automatically metalizing the terminal ends of monolithic capacitor chips, which includes an endless conveying tape having formed therein a plurality of first apertures, a plurality of thin, resilient masks, each adapted for receipt in one of the apertures, in co-planar, fixed registration therewith, each mask having at least one second aperture formed therethrough of a size and shape to compliantly receive a chip therein, in an orientation whereby the contact surfaces extend outward from both sides of the tape, a way to for load the masks with a plurality of chips including a cylindrical wall having formed therethrough at least one orifice for registration with the second aperture in the mask, the cylindrical wall adapted for rotation through an inventory of the chips for introduction of the chips into the orifice in transverse specific alignment with their contact surfaces extending outward from the cylindrical wall orifices, a way to accurately move the chip-loaded orifices into registration w

Abstract: A method and device for applying liquid, pasty or plastic substances, in particular thermoplastics, through perforations of a cylinder, belt or the like to a substrate, in particular a textile fabric, wherein the belt or the like encloses an interior space which is evacuated, preferably continuously, during the coating operation.

Abstract: Disclosed herein is a method of forming strip-shaped electrodes over an end surface of a plate-shaped electronic component and two major surfaces which are in series with the end surface. A slit plate, which is provided with through slits having widths corresponding to the width of electrodes to be formed, is located above an electrode paste bath while an electronic component is arranged above the slit plate so that its end surface extends across the through slits. Before or after this step, the electrode paste is made to swell to a constant level beyond the upper surface of the slit plate, thereby applying the electrode paste to the end surface of the electronic component and the two major surfaces which are in series with the end surface in the form of strips.

Abstract: The present invention provides an apparatus and a method for forming a uniform and smooth coating film on a surface of a cylindrical body, for example, for production of an electrophotographic photosensitive body. The apparatus of the present invention includes a float having a space portion formed in the inside thereof for floatation in the liquid surface of the paint. The float is specifically formed so that even in the case where the paint contains a solvent that gradually evaporates, no bubbles are generated from a lower portion of a hollow cylindrical body during the coating step, because the pressure rising inside the hollow cylindrical body is moderated by the space portion of the float.

Abstract: This invention relates to an apparatus for coating solder on the outer leads of TAB-type semiconductor devices. The solder coating apparatus comprises a solder tank accommodating a heater, a discharge tank having an open top and a solder inlet opening at a lower part thereof, a square pillar having a top of substantially the same or slightly greater size than a semiconductor element and arranged inside the discharge tank and projecting beyond the open top thereof, and a solder pressure feed screw near the inlet opening of the discharge tank. A film carrying semiconductor elements is intermittently stopped when one of the semiconductor elements arrives above the square pillar. Molten solder is discharged from gaps between the inner walls of the discharge tank and the square pillar onto the outer leads of the semiconductor element positioned over the pillar.

Abstract: A doctor for applying material, having a pressing part (doctor body) bending elasticly in the longitudinal direction and corresponding to the application width and a row of segments for pressing the pressing part, the segments (20) are connected in link-like manner by web or holding parts (203, 29, 39, 4, 40 to 48) to a unit-forming pressing device (2) pressing at least one pressing part (3, 30, 31, 32, 36), and the segments (20) being held independently to the pressing part (3, 30, 31, 32, 36).

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

Abstract: An apparatus and method for fabricating integral three-dimensional objects from successive layers of photoformable compositions by exposing the layers of the composition through a detachable flexible transparent film, one side of the film being in contact with the composition and the other side of the film with a rigid transparent plate, which guides and supports the film.

Abstract: A solder paste stencil printing process and apparatus in which a stencil plate having a porous figure printing area may be used for single component solder paste application. The printing operation is performed by alignment of the stencil pattern figure over the appropriate component substrate pads. With the stencil plate being held in place by downward force, solder paste is dispensed over the stencil plate pattern allowing gravity flow of the paste material into the stencil pattern pores. Excess paste material is squeegeed level to the top surface of the stencil plate and the plate lifted from the substrate surface leaving solder paste in the configured pattern. An associated stencil plate holder matched to the apparatus receiver head allows any number of stencil plate patterns to be made available for solder paste application.

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.