Abstract: A dual speed electrostatic printer having a displaceable printing stylus adapted on one position to provide maximum visibility of the characters being printed and in a second position to provide maximum printing speed and minimum interference with the developing apparatus, together with drive means to index the toner bearing donor roll to present fresh donor roll surface.

Abstract: In a standard screen printing machine a linkage assembly is provided for connecting the screen support and the printing bed support in such a manner that the screen support is movable into and out of an operative position. The link arrangement is selectively connected to the screen support to provide, in the alternative, movement according to a parallel linkage arrangement or tilting movement about an axis of the linkage assembly.

Abstract: A screen processing machine has a frame supporting a printing screen which is capable of upward or downward movement. The frame pivots along one side thereof transverse to the longitudinal direction of transverse of a carriage, while the opposite side of the frame has lifting means provided in the carriage which are formed from two rigid laterals or sides having transverse end pieces and which form a cradle wherein the frame is situated. The frame is reinforced with two rigid heads, solidly fixed thereto at the external portion of the sides thereof transverse to the advance direction of the carriage. Such heads form elements wherein supports from which the frame is suspended are solidly fixed. The frame has parallel guides along which aligned supports slide, each one of which a vertical column which constitutes a guide element for lifting devices supporting a squeegee or stripper bridge.

Abstract: Automatic registration of the web of sheet material on a printing cylinder is effected in a silk screen printing apparatus which includes a printing frame reciprocably movable in an impressing and return cycle. A printing cylinder is arranged for carrying a web of sheet material in impression receiving relation to said printing frame during the impression-forming portion of its movement. Web guide rollers are arranged to direct the web to and from said printing cylinder. A first drive arrangement, including a first motor, is connected both to drive the printing frame reciprocably and said printing cylinder unidirectionally in the impression-receiving direction. The printing cylinder is disengaged from the first drive during the reverse travel of the printing frame so that the web is stationary. A second drive arrangement is provided, including a second motor, connected to drive the printing cylinder in a second direction, that is the reverse of the printing direction.

Abstract: A device for rolling up onto a core a stencil or ink screen being removed from a duplicator, in which a pair of rotatable core holding members is located adjacent the or a duplicator cylinder and at least one of the members is driveable from the cylinder by means of a drive wheel carried on a pivotable lever.

Abstract: A screen setting apparatus accurately locks a screen in position so that reference marks of the screen come directly in line with reference marks of a printing table, which table secures a sheet material to be printed. The apparatus comprises three registration devices, a screen having reference marks thereon, a screen fixing device, and a printing table securing a sheet material to be printed and having reference marks. The three registration devices are a first registration device, the reference mark of the printing table corresponding to a fixed relationship of the second registration device (i.e., a reticle) and a third registration device. The reticle is lined up with the reference mark of the screen and then the screen is locked in opposition by connecting the screen fixing device with the first registration device.

Abstract: A mechanical squeegee apparatus directed for use with and mounted on a stencil screen printing device. The apparatus includes a longitudinal support bar and a lateral support bar which is mounted for movement along the longitudinal bar and which extends transversely thereof and over said screen. A squeegee is mounted on the lateral bar for free movement along its length and for substantially free rotational movement relative to the lateral bar on an axis vertical and perpendicular to that of the lateral bar. The free lateral movement and the substantially free rotational movement allows the squeegee to be used to sweep ink from the side edges of the screen toward the center without the use of an intermediary device such as a hand-held card or scraper.

Abstract: A downwardly open applicator housing, surrounding and mounted on a dyestuff-supplying tube within a cylindrical printing screen, carries an elastic diaphragm which spans its lower end in a slack state so as to hang down with a convex underside under the weight of a load of dyestuff in the housing and a pair of bars bearing upon the diaphragm from above. The central region of the diaphragm, flanked by the weighting bars, has a series of axially spaced openings for the discharge of the dyestuff; a flexible but substantially inextensible reinforcing strip of low-friction material, having a longitudinal slot registering with these openings, is bonded to the underside of the diaphragm to facilitate relative sliding of the screen and seal the gap region against leakage of dyestuff onto the inner screen surface. The upper diaphragm surface may have gap-bridging elements such as threads or wires bonded thereto as additional reinforcements.

Abstract: A dyestuff applicator inside a cylindrical printing screen comprises an elongate hollow body with a bottom portion contacting the inner screen surface and an outlet for ink supplied to that body through one of two tubular extremities thereof, these extremities being clamped in respective mountings with their axes disaligned to generate stresses counteracting the forces of gravity and friction which tend to deform the outlet from its linear shape. Each end mounting may comprise a pair of axially spaced rigid rings with toroidal inner surfaces, of adjustable relative elevation, or an elongate sleeve cradled in a vertically adjustable bearing frame in which the sleeve can be immobilized at a desired inclination to the horizontal and the vertical. The sleeve may have a yieldable lining or be braced by damping springs and dashpots against oscillations of the applicator body.

Abstract: A screen printing press employs a screen carriage securing a printing screen frame and screen therein and which reciprocates through print and return strokes over a reciprocally rotating print cylinder. Printing stock is advanced between the print cylinder and the screen during printing strokes. The screen carriage includes a disengageable drive which permits feeding print stock through the machine without effecting printing thereon. The screen carriage further includes adjustable screen frame holding means to which the screen frame is slidably mounted permitting partial or total removal of the screen frame from the screen carriage. A fully adjustable squeegee means and flow coater assembly is positioned above the screen and is provided for elevating and longitudinally shifting the flow coater and squeegee assembly away from the printing area for inspection and maintenance of the press.

Abstract: In an embossing press, a pair of rolls are arranged to be moved toward and away from one another to effect the embossing operation. Each embossing roll includes a number of drums with replaceable indicia plugs on their circumferential peripheries. The drums are detachably coupled to a shaft so that the drums can rotate with the shaft or can be uncoupled while the shaft continues to rotate. A drive system is connected to each of the shafts for rotating them through a predetermined angle of rotation. An arrestor set-up is associated with the drums for uncoupling each drum from its shaft so that a particular indicia plug is located in the operative position of the embossing rolls. A feeder mechanism directs a continuous length of sheet material into the operating position of the rolls and shearing blades, movably connected to the shafts, are arranged to cut the sheet materials into individual sections.

Abstract: An horizontal tabulation apparatus wherein a plurality of sensing elements defines code combinations corresponding to the tabulation positions and divides a plurality of cams in groups each associated with predetermined tabulation positions; stopping means are actuated by the plurality of sensing elements when the groups generate the same code combination in correspondence with tabulation positions associated therewith.

Abstract: A screen printing machine which includes a frame, a backing member supported by the frame, and at least one rotary screen assembly carried by the frame in adjustable relationship with respect to the backing member. Each rotary screen assembly includes an inner elongated support member, an outer hollow screen rotatably supported about the inner elongated support member for rotation thereabout, and elongated applicator means which engages the inner surface of the hollow screen and which is supported by the elongated inner support means. Pressure adjusting means are carried within the interior of the hollow screen, comprising a plurality of individually inflatable elongated tubes positioned behind the elongated applicator means. In one embodiment, the outermost tubes extend beyond the extremities of the applicator means.

Abstract: A method and apparatus are disclosed wherein a signal proportional to the speed of a moving web is compared with a signal proportional to the speed of a motor driven rotary, printing member, and a resultant corrective signal is transmitted to the control for the motor, so that the linear speed of the rotary printing member is made equal to the web speed. A plurality of printing members are provided so that the linear speed of each of the printing members is made equal to the web speed and in synchronization one with the other. The method and apparatus as aforesaid are specifically adaptable for rotary screen printing of fabrics, wherein the fabric contactingly engages a plurality of rotating screens in series, and a color is passed through each screen in selected predetermined areas, so that the composite screen printings provides a repetitive design on the fabric.

Abstract: A squeegee assembly for use on a screen printing machine which includes a squeegee holder and associated squeegee blade having a liquid filled tubular member for exerting a liquid or hydraulic pressure on the squeegee blade in a manner whereby the pressure exerted by the squeegee blade is equalized along the entire length thereof and to provide the squeegee blade with the flexibility necessary to conform to a printing surface. The assembly may also include a piston and cylinder assembly to vary the liquid pressure exerted on the squeegee blade and/or a contour bar through which the liquid pressure is transmitted to the squeegee blade.