Abstract: A bearing assembly for a cylindrical device, which is capable of assuring rapid exchange of the cylindrical device, comprising a bearing housing surrounding an antifriction bearing cage provided with roll bodies, wherein a circular opening remains open, through which the roll bodies protrude in order to be supported at the cylindrical device to be borne. The bearing housing is subdivided into two parts or housing members in a plane passing through the axis, so that one of the parts or housing members can be swiveled against the other. Also, the antifriction bearing cage is subdivided, namely into individual cages loosely joined together.

Abstract: A nozzle of a dyestuff applicator has a cylindrical valve housing formed with an orifice obstructable by the tip of an electromagnetically displaceable needle which controls the outflow of dyestuff from a chamber in that housing. The chamber is sealed by a rubber diaphragm which is penetrated by the needle whose shaft is engaged by a pair of parallel membranes of spring steel peripherally clamped in an extension of the housing. Each membrane comprises a narrow outer ring with an inwardly projecting tongue split into two diverging branches which are interconnected at their free ends, near the diametrically opposite side of the outer ring, by a re-entrant web extending radially between these branches and terminating in an inner, needle-supporting ring concentric with the outer ring.

Abstract: A broad textile web, on its way to a processing station such as a rotary-screen printer, passes around a set of closely juxtaposed but independently rotatable feed rollers that are individually driven via respective differential gear trains each having a first input connected to a common drive shaft and a second input connected to an ancillary stepping motor. Each feed roller engages a strip zone of the web which is scanned by an associated sensor upstream of the roller, the latter detecting the leading and trailing edges of recurrent transverse web sections--e.g. of pile fabric--mechanically, electrically or optically distinguishable from intervening sections. Unequal longitudinal tensions in the several strip zones actuate the sensor-controlled stepping motors for different time periods so as to cancel any relative deformation.

Abstract: To produce a perforated metal foil, especially for use in a screen printer, a decomposable, dissoluble or vaporizable dielectric substance is deposited on a cylindrical conductive substrate in a dot pattern under the control of a photoelectrically scanned master. The spaces between the dots are then filled with an electrolytically deposited metal forming a coherent layer which is subsequently stripped off the substrate. The deposition of the dot pattern is carried out through a spray nozzle, sweeping the rotating substrate, which has an outlet in a bottom wall of a narrow space filled with the liquid dielectric to be dispensed, that space being separated by an apertured partition from an overlying plenum chamber in which the air is intermittently pressurized by an electromagnetic armature to expel a limited quantity of dielectric through the outlet; the membrane may be vibrated at supersonic frequencies to generate the necessary discharge pressure.

Abstract: Relatively inflexible travelling webs, such as carpets or rugs having a coating on the reverse side thereof, are guided in a convoluted path around a plurality of guide rollers, and in this path they are heated by being subjected to steam heat, hot air heat, heat-producing radiation or heat derived from other sources.

Abstract: A group of cylindrical printing screens, rotatable about parallel axes, are journaled on a machine frame and carry coaxial gears in mesh with driving pinions on the frame. A bed, designed to support a substrate to be imprinted, is supported underneath each screen on the frame through the intermediary of elevation-adjusting wedges interlinked by a control rod. The sceens can be axially tensioned by mounting units, slidable on axially extending guide rods, which carry spring-loaded thrust bearings acting in an axially outward direction upon their coaxial gears.

Abstract: A doctor blade device particularly for screen printing machines preferably for textile printing on webs of material, which comprises a metallic stroke lip leaf for the coating of flowable color materials on flat webs of material, and means for providing different supporting conditions over a freely projecting length of the stroke lip leaf.

Abstract: An apertured rectangular foil of substantially inextensible sheet metal, e.g. nickel or steel, has a hole at each corner engaged by a resiliently biased gripper exerting on it a diagonally outward force to hold the foil stretched in a surrounding tenter frame supporting these grippers. The frame is provided with marginal ledges, underlying the foil at least along the major sides of the rectangle, onto which the foil edges are releasably pressed by toggle clamps.

Abstract: A horizontal dyestuff-supply tube within a cylindrical printing screen supports a prismatic applicator housing whose bottom is formed from two transversely spaced angle profiles for the guidance of a vertically movable distributing member. The latter is in the shape of a block with a multiplicity of vertical passages terminating at its underside in a discharge slot, the block penetrating upwardly into the applicator housing and supporting a perforated slack membrane of rubber or the like secured to the upper block surface and to the lateral inner bottom surfaces of the housing to form aprons preventing the penetration of dyestuff along the guide surfaces of the angle profiles. These profiles may be interconnected by transverse bolts passing through vertical clearances formed in the distributing member between its passages.

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 invention relates to the printing of sheet-heavy-pile textile materials, especially carpets, characterized in that powdered dyestuff preparations are applied to the sheet of textile material in consistency with the pattern, preferably by the screen- printing or film-printing techniques, the dye is subsequently fixed by the action of heat and any constituents of the dye preparations which are not fixed are removed by suction or by washing. The new method is economical and causes no or little pollution.

Abstract: A dyestuff applicator for an apertured printing screen, curved about a horizontal axis, comprises an axially extending supply tube within an elongate casing supported thereon, the open casing bottom being surrounded by flanges in clamping engagement with an elastic membrane curving downwardly toward the underlying screen surface under pressure of the overlying liquid and of a limitedly vertically movable loading frame. A metallic foil, curved cylindrically about the screen axis, is interposed between the membrane and the screen, the foil and the membrane being provided with aligned openings which form an outlet for the dyestuff liquid along a median zone of contact bracketed by the frame.

Abstract: An arrangement on screen printing machines, particularly rotary screen printing machines, in which the dyestuff is taken from a dye pan and passed through the apertures in a screen and is applied onto the web of goods to be treated, which comprises a dye shutter disposed in the penetration zone for the dyestuff on the side of the screen remote from the weg of goods, to be closed when the machine is stopped.

Abstract: A dyestuff applicator, overlying an area of contact between a movable printing screen and a substrate, comprises a horizontal supply tube which supports an axially extending dyestuff-distributing member with freedom of relative mobility in a vertical axial plane of the tube. The bottom portion of the distributing member, forming an axially extending dyestuff outlet in the shape of a slot or a multiplicity of closely spaced apertures, is separated from its top portion, secured to the tube, by a bar-shaped body of relatively soft material which is readily compressible in the vertical direction while resisting deformation in a horizontal plane. The distributing member is weighted down by the pressure of the liquid dyestuff in a overlying space or by springs inserted between that member and the supply tube.

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 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 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: A dyestuff applicator, located inside a cylindrical printing screen, comprises a horizontal tube which supports an axially extending dyestuff-distributing member immediately overlying the inner screen surface. The distributing member, or at least a membrane-shaped bottom thereof, is under pressure of the liquid dyestuff supplied to the tube at a superatmospheric pressure equivalent to a head of at least 1000 mm water. To insure full effectiveness of this pressure over the length of an outlet zone in the bottom of the distributing member, the body of liquid overlying that zone within the applicator should have a cross-section exceeding in at least one dimension 1.5% of the length of a flow path as measured from a point of entry of the dyestuff into the space containing that body of liquid.

Abstract: A dyestuff applicator, overlying an area of a movable printing screen through which dyestuff is to be fed to a substrate, comprises a horizontal supply tube which supports an axially extending dyestuff-distributing member with freedom of relative movement in a vertical axial plane of the tube. The distributing member, resting under pressure on the screen, forms a discharge slot communicating with the interior of the tube through a multiplicity of conduits closely spaced along the tube axis, the conduits being disconnectable from the slot with the aid of a slidable or rotatable shutter lodged in the distributing member and controlled by an external actuator mounted on the supply tube.

Abstract: A dyestuff applicator, located inside a cylindrical printing screen, comprises a horizontal ink tube which supports an axially extending ink-distributing member with freedom of relative mobility in a vertical axial plane of the tube. The distributing member, resting on the inner screen surface, forms a discharge slot communicating with the interior of the tube through a multiplicity of conduits closely spaced along the tube axis, the conduits being disconnectable from the slot with the aid of an axially slidable or rotatable shutter common to all the conduits and lodged in the distributing member. This distributing member is weighted down by the pressure of the ink in an overlying space, or by springs or fluid cushions inserted between that member and the tube.