Abstract: A web conveying apparatus comprising a series of air jetting boxes alternately arranged on opposite sides of a conveyed web. Each air jetting box has two outlets jetting air toward the web. The outlets are at opposite edges of the air jetting box and direct the air inwardly at an angle of 15.degree. to 45.degree. from the perpendicular of the main or air jetting surface of the box.

Abstract: A sheet feed tractor of the type used in printers for automatically advancing paper and the like has a recess in one surface of the chassis about the passage for the support shaft and axially extending, resiliently deflectable fingers in the recess and through which the support shaft will pass. The fingers are disposed in substantially alignment with the drive belt and are deflected inwardly by a rotatable clamping member disposed thereabout to effect clamping action on the support shaft substantially in alignment with the drive belt. This orientation of the clamping action precludes inadvertent movement of the tractor on the support shaft during clamping of the tractor thereon and also eliminates undesirable torque on the tractor when the tractor is operating by essentially eliminating any moment arm between the clamped area and the center line of the drive belt.

Abstract: The joint comprises a first end portion to be coupled and shaped like a sort of cup, in which a second portion, shaped like a flange, and to be joined to the first one, is insertable, wherein the second portion is internally occupied for a section by a precision seating recess, for a cylindrical element of highly insulating material, and flush to the inner wall of the conduit. The end of the cylindrical element, facing towards the bottom of the cup, has a radially directed annular projection for the constant separation of the flange from the bottom of the cup, the projection axially and sealingly engaging with an annular gasket, and being provided with a collar for the blocking therein.

Abstract: An endless ink ribbon cassette wherein a ribbon is drawn from a storage void for printing and reintroduced into the storage void after printing. The cassette includes a first driven induction wheel having first and second rim portions spaced apart on an axle. A second idler induction wheel, also mounted on an axle, is urged against the rim portions, the first and second induction wheels cooperating to draw the ribbon onto the first induction wheel and between the first and second induction wheels, whereby the ribbon is introduced into the storage void. A fixed insert maintained between the first and second rim portions prevents entry of the ribbon between the first and second rim portions.

Abstract: To feed a sheet of paper by use of a frictional force with the paper sheet, feed holes aligned in the direction of feeding at either edge of the paper sheet are detected by means of a feed hole detecting means located in a feed hole detecting position. An actual amount of paper feeding is measured by detecting the feed holes that pass through the feed hole detecting position, and then the amount by which the paper feeding means is to advance is adjusted according to the measured actual amount of paper feeding. Paper feeding can thereby be precisely controlled. Additionally, a paper feeding amount control circuit measures the initial phase difference between the position of a feed hole in a sheet of paper and the feed hole detecting position in the initial stage of paper feeding.

Abstract: This invention relates to a device for floatably guiding webs of material by means of gaseous or liquid medium. The device comprises at least one elongate flow member having a surface convexly curved on the top side proximate the web, and nozzles which are disposed in rows along longitudinal edges and via which the gaseous or liquid medium can be introduced in jets between the flow member and the web of material. The nozzles associated with one longitudinal edge of the device are offset in pitch in relationship with the other longitudinal edge and are so disposed that opposing diverging flow jets, flow past one another without mutual impedance. The apparatus operates on both the supporting airfoil and air cushion principles, with a smooth transition from one principle to another.

Abstract: A yarn conveying apparatus is disclosed, and which comprises a pair of circular discs, each having a yarn engaging front surface. The discs are mounted for rotation about respective axes which are inclined with respect to each other, and such that portions of the respective yarn engaging front surfaces are disposed in a closely adjacent opposing face-to-face relationship and define a yarn advancing zone therebetween. The discs are resiliently biased toward each other at the yarn advancing zone, and so that the discs are adapted to engage and advance a yarn which is guided through the advancing zone, without substantial slippage.

Abstract: A duct seal for sealing a duct (4) to a substrate (20) such as a feedthrough comprises a sealing member (6), a biasing member (8), such as a wrapped spring sheet and an insert (12) positioned between the substrate (20) and the sealing member (6). The biasing member (8) can be operated, through the insert (12) from the outside of the duct. When the substrate is a feedthrough (20), for example, it is advantageous that the biasing member (8) is operated through the insert rather than through the feedthrough (20) itself, since it allows the feedthrough to be temporarily sealed against contaminants.

Abstract: A method and a device for intimately mixing two or more liquid or paste-like components inside a flexible plastic package (2). A squeezing roller (3) causes the components to be fed forward step by step between different compartments in the package, whereupon the discharge from one compartment to the next occurs suddenly and explosively, so that intimate and effective mixing of the components (A,B) is achieved.

Abstract: In a fastener attaching machine, a tape feed apparatus comprises a shaft manually rotatably supported by a holder, a feed roller mounted on the shaft via a one-way clutch for rotation with the shaft in one direction only, a spring normally urging the shaft to be rotated in the other direction, and a stop means for restricting the angle of the manual rotation of said shaft.

Abstract: A feed mechanism for moving a web is disclosed. It includes a means for engaging the web that has a plurality of uniformly spaced drive pins for extending through and engaging web perforations. It also includes a means for guiding the web onto the drive pins, such as a door, and it includes a guiding surface that extends below the upper end of the pins. The guiding surface includes a static protrusion that extends below the guiding surface and urges the web and its associated perforation down onto the drive pin in that portion of the tractor where the drive pins are inserted into the web perforations.

Abstract: A paper feeding tractor including a frame formed by a pair of said frames; a driving sprocket rotatably supported between both side frames at a first end portion of the frame; an endless belt adapted to be driven by the driving sprocket; a pair of first supporting rollers located at a second end portion of the frame and arcuate guiding members projecting from the opposite inner surfaces of the side frames at the second end portion for supporting said endless belt in a loop, whereby the endless belt is arcuately supported by the first supporting rollers and the arcuate guiding members; and a second supporting roller rotatably supported between both side frames at a longitudinal position between the driving sprocket and the first supporting rollers to support the inner peripheral surface of the end belt.

Abstract: Apparatus for drying a running paper web and floatingly suspending it without contact during the drying process, including air bars which are spaced apart from one another along each side of the web and are fed with pressurized air for a supply duct. The air bars have an air supply opening, and the supply ducts have an air feed neck adapted to be inserted in said air bar supply openings for directing pressurized air thereto, O-ring type seals are located between the bar openings and the duct feed necks to permit relative sealing movement between the bars and supply duct an angular adjustment between said air bar and the duct permits tilting of the bars longitudinally relative to the web to vary the angle of the air discharge against the web.

Abstract: Apparatus for drying a running paper web and floatingly suspending it without contact during the drying process, including air bars which are considerably larger than conventional air bars, for example, being about five and one-fourth inches square in cross-section, and being about three and one-half inches between their nozzle slots. These large air bars are spaced apart from one another along each side of the web a distance of about 15 inches. By so dimensioning the air bars providing the greater spacing between the air bars, considerably more drying capacity is provided, on the order of 14 percent, and requiring less energy input into the dryer. Web drying equipment for sealingly mounting the air bars on the air supply duct means so that the bars can be individually adjusted toward and away from the web can also be tilted or pivoted to change the angle of the drying air being discharged against the web.

Abstract: The invention is related to a method for dispersing two phases in an extraction process so that each extraction step includes several mixing stages, and at each mixing stage the mixing is carried out by means of a vertical circulation and advantageously at least one mixing stage is provided with an intensified vertical circulation. According to the invention, the dispersing apparatus of one extraction step in an extraction process is formed of several mixers provided with circulation cylinders (11). Advantageously at least one of the mixers is provided with a dispersing pump (16).

Abstract: An apparatus for feeding an elongate surface tape or a strip of piled, plushed or tufted textile along a predetermined path has a drive roller which has a multiplicity of wire bristles planted in its surface for releasable engagement with the strip. Disposed upstream of the drive roller with respect to a predetermined traveling direction of the strip, an idler roller is also provided with a multiplicity of wire bristles for releasable engagement with the strip. The idler roller is constantly braked to hold the strip under tension as it extends over the two rollers. The wire bristles on the rollers may be either straight or bent and may either extend radially of the rollers or be inclined in prescribed directions with respect to the traveling direction of the strip.

Abstract: In the stepwise feeding of a packing material web for the application of cover strips over prepunched pouring openings, the pouring opening is sensed by means of a photocell which is located at as great a distance from the point of application as the distance between two pouring openings. Any errors in this distance will thus affect the accuracy of application. In order to avoid this is proposed in accordance with the invention to sense the passage of the actual pouring opening and start a countdown sequence, at the end of which the web feed is interrupted with the pouring opening in correct position for the application of the cover strip. An arrangement for the realization of this, seen in the direction of feed of the material web (1) comprises a sensing device (4), a processing device (5) and a forward feeding device (9) which are connected to a control unit (13).

Abstract: An apparatus for removing an endless paper web folded in a large stack and for feeding the paper web to the printing unit of a high-speed printer, particularly a laser printer applying a removal force, at least above stack and in the removal direction behind the same and in front of the printing unit of the high-speed printer is positioned at least one guide roller. At least one of the guide rollers also serves as a deflection roller and for reducing the removal force and, consequently, prevent the risk of the paper web tearing. At least one deflection roller is provided with an additional continuous drive.

Abstract: A mechanical figure eighting apparatus is disclosed which permits a fiber optic cable to be deposited on the ground in a random or figure eight configuration. Fiber optic cable is passed over a rotating drive wheel and is held in frictional engagement with the peripheral rim portion of the drive wheel by a pressure wheel mounted thereover. The fiber optic cable is passed or pushed outwardly through a tubular member extending outwardly from the drive wheel. The fiber optic cable is deposited on the ground in a random fashion or figure eight fashion as it is discharged from the tubular member.

Abstract: An improved film transport assembly is provided for intermittently advancing film, without pulldown claws or similar mechanisms for engaging film perforations to obtain intermittent transport, with extended dwell period past the film gate of a camera or projector, particularly such as a motion picture camera or projector adapted for high speed film transport or for handling relatively large film formats. The transport assembly includes film supply and takeup sprockets for constant velocity film transport respectively to and from the film gate, with the film passing over a primary roller and a compensation roller interposed between each sprocket and the film gate.