Abstract: An improvement in printing presses wherein main press side frames are provided with circumferential slots about the axis of plate or printing cylinders for receiving sectional or reversible mounting blocks for carrying impression cylinders. The mounting blocks have eccentrically mounted cylinder bearings and adjustment means are provided for precisely locating the blocks in the slots. The Invention provides for ready changing of the press from letterpress to offset or planographic printing.

Abstract: A screen holder mechanism tensions a rotary screen in the axial direction thereof. Novel tensioning and retaining means are positioned between a screen holder and each end of the screen to position the screen at a predetermined vertical position. The tensioning and retaining means provides that the resultant of the axial tension applied to the screen coincides with the longitudinal axis of the screen, thereby avoiding dynamic stress on the screen.

Abstract: A cylindrical printing screen, rotatable about a horizontal axis, rolls on a continuously moving substrate to be imprinted and is internally provided with an applicator forming a gap through which a printing dye can pass to the substrate along the nadir of the screen. A codirectionally rotating scraper roll continuously sweeps the descending part of the outer screen surface and is in turn contacted by a squeeze roller or a doctor blade for the removal of excess dye. A similar cleaning device, e.g. in the form of an elongate suction nozzle, may be disposed along the rising part of the inner screen surface. The scraper roll can be continuously irrigated with rinse water and may be mounted, together with one or more spray heads, on a swingable frame for disengagement from the printing screen.

Abstract: A cylindrical printing roll is provided in combination with an endless conveyor that has a plurality of balloon carriers on the conveyor in uniformly spaced relation. Drive members connect to the conveyor for intermittent drive thereof, a printing station being provided on the conveyor course immediately adjacent the printing roll and each balloon carrier is stopped at such station, while devices for inflating a balloon on the carrier when stopped at the printing station and cylindrical rollers to press an inflated balloon at the printing station against the printing roll for printing action are also present.

Abstract: A typing device comprises a character-bearing disc having a central part for being fixed on a selector shaft and a peripheral rim with a plurality of selectable flexible laminae. Each lamina carries a particular character and striking means flexes the selected lamina to strike against a typing point of a sheet carrying platen for typing. A positioning element, for angular positioning the characters with respect to the typing point, comprises a recess cooperating with a wedge-shaped profile of each one of the selected laminae when the character strikes on said platen. The laminae carry alphabetic and numerical characters and a gap on periphery of the disc enables the last typed characters of a typing line to be seen and read. Further a hooked element cooperates with an elastic means of a flange integral with the selector shaft to removably fix the character bearing disc to the selector shaft.

Abstract: Three rollers are mounted on a support for rotation about parallel axes which are respectively located at the corners of an imaginary triangle. A flexible printing screen is trained about the rollers to be frictionally entrained thereby. Mounting arrangements are provided at the opposite axial ends of the rollers, journalling the same for rotation, and intermediate these mounting arrangements there are provided supplementary mounting arrangements which engage each of the rollers intermediate the main mounting arrangements.

Abstract: A roller wick is positioned to transmit moisture in an uphill direction by capillary action from a roller wick reservoir to an inked paper roller drive means. A thicker relay wick transmits relatively large amounts of fluid from a relay wick reservoir, positioned higher than the roller wick reservoir, to the roller wick reservoir. The relay wick itself is positioned over the roller wick reservoir so that any drippings therefrom are deposited within the roller wick reservoir.

Abstract: A tooth for a loading or excavating bucket includes a support member connectable to the edge of the bucket and a replaceable wedge-shaped slide-on cap. The front portion of the support member is inclined with respect to the rear portion, and the latter can be connected to the bucket in either of two positions 180.degree. apart so that the front portion and the slide-on cap can be disposed in either of two corresponding positions.

Abstract: In a stencil screen printing system, submersion transfer apparatus for forcing fluid through the pattern screen, including an elongated member with downwardly depending end supports having therebetween a strand submersed in the coating fluid e.g. printing ink. The elongated member is fitted in place of the conventional squeegee on a stencil screen press, so that the submerged strand is positioned in contact with the upper surface of the stencil screen during the print stroke to force fluid such as ink through the pattern of the mesh screen.

Abstract: A screen printing machine is provided which includes a frame, a backing member supported by the frame, and at least one rotary screen assembly carried by the frame. 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 an elongated applicator, which may be a conventional squeegee, which engages the inner surface of the hollow screen and which is supported by the inner elongated support member located within the screen. A first drive is provided which is operatively connected with the backing member for rotating the backing member. A second drive is provided for rotating the hollow screen independently of said first drive and the backing member.

Abstract: A printing machine such as a screen printing machine having a series of pallets connected to an endless drive whereby the pallets are sequentially advanced to a printing station. The improvements reside in an arrangement in which the article support portion of the pallets are rendered readily removable to provide for interchangeability and which pallets have connected thereto guide rollers for laterally stabilizing the pallets as they advance through a printing station. An antiwhipping device is also operatively associated with the respective pallets to prohibit whipping the pallets round the ends of the endless drive, and a support arrangement is provided for supporting the pallets traveling along the lower flight of the endless drive.

Abstract: A machine for printing a recurrent pattern on sections of predetermined length of a textile web, comprising a number of parallel rotary-screen printing units spaced apart in the direction of web motion, includes a first sensor for detecting the leading edge of an oncoming web section to be imprinted and a second sensor for ascertaining the passage of a mark indicating the start of a printing pattern on the first unit. The odd-numbered units print the first half of the pattern, in different colors, whereas the even-numbered units print the second half in corresponding colors; between printing operations, the screen of each unit is lifted off the web and can be angularly readjusted to compensate for relative disalignment between the web sections and the printing patterns.

Abstract: The tool of an earthworking machine has a support and load transfer lug attached to the internal surface of the tool at the cutting edge by an attaching portion and a cylindrical mating portion extending forwardly and overlapping the cutting edge. A tooth adapter is mounted on the lug by means of a cavity in one side of the adapter, the cavity overlapping the attached portion of the lug, and a cylindrical bore communicating with the cavity closely fitting on the mating portion of the lug. The tooth adapter extends forwardly and carries thereon a tooth. A bolt extends through a rearward extension of the tooth adapter and the cutting edge of the tool to detachably affix the tooth adapter to the tool.

Abstract: A clip constructed of resilient material slidably engages the door of a paper web drive tractor of a printer. The clip defines two reference edges which are spaced by an amount substantially equivalent to the distance between a type line reference rod and the print line of a print mechanism. The operator aligns a selected type row on the web with the reference rod and slides one reference edge adjacent a mark on the web. The web is moved until the mark is aligned with the other reference edge of the clip and the selected type row is thereby positioned on the print line.

Abstract: Stencilling apparatus for applying successive coatings to traveling web stock. The web stock may be advanced in successive wraparound turns to the same stencilling station. The adjacent turns are stencilled simultaneously at this station by a multipart squeegee in a multipart stencil frame, after each is placed in registry. The web tension in each turn of web stock is independently controlled by a pressure differential controller that retains a variable length loop of web under tension by a dynamic air flow pressure differential, which also causes a drying action of any coating on the web.

Abstract: A stencilling printer with a flow coater specially mounted to sense viscosity of stencil fluid flowing from a reservoir between the flow coater and the squeegee, the flow coater being shiftable and operably associated with a supply of viscosity-altering liquid for controllably altering the viscosity of stencil fluid in the reservoir.

Abstract: Web stencilling and drying apparatus for web stock with at least one intermittent feed stencilling station and slit registry means for stock therefor, a continuous feed ultraviolet drying station, and first and second dynamic flow pressure differential web controllers upstream and downstream of the ultraviolet drying station, the first one including sensors responsive to the length of the web loop therein to control web intermittently fed thereto and continuously fed therefrom.

Abstract: A stencil screen printing press especially suitable for web stock, employing a stencil frame that rocks back and forth over a curved bed in a controlled relation to retractable web register means and to web directional control and advancing means.

Abstract: Slit registry apparatus and method for registry of flexible, generally planar stock as for stencilling thereon, involving formation of periodic transverse slits and adjacent edges in the stock, at least one of the edges and the adjacent stock zone or area being offset from the plane of the stock for engagement of this offset edge by a registration surface.

Abstract: An improved burster for separating continuous business forms stationery assemblies into individual form lengths of the type including an infeed mechanism for driving the continuous assembly into a burster which, in turn, separates the assembly into individual form lengths which are placed on a conveyor to be conveyed to a stacking tray. The burster includes a powered mechanism whereby the burster, the conveyor, and a portion of the stacking mechanism may be simultaneously adjusted for various form lengths. Also incorporated is an automatic electrical system responsive to such adjustment for automatically adjusting the conveying rate of the conveyor to insure proper shingling of the individual form lengths thereon. The burster is in a housing having a movable cover whereby access to the various mechanisms may be obtained. A control system provides for jogging of the mechanisms with the cover open that precludes continuous operation for safety purposes.