Abstract: Apparatus for applying a foamed medium to a running workpiece has a tubular housing which is disposed in the interior of a rotary screen and forms part of a slotted squeegee whose outlet allows the foamed medium to flow from the interior of the housing against the internal surface of the screen. The outlet contains one or more deflectors in the form of shoulders, bars, rods or other types of obstacles which prevent the medium from flowing along a straight path from the opening or openings of the housing directly against the internal surface of the screen. This reduces the likelihood of non-uniform application of the medium to the workpiece.

Abstract: Two or more liquid treating agents which are to be applied to a stationary or running substrate are formed ahead of a collecting unit which thereupon admits a foamed compound composition into the applicator wherein the composition passes through the interstices of a screen so that it is reconverted into a liquid prior to contacting the substrate. The collecting unit can comprise or may be followed by a mixer, depending upon whether or not the constituents of the compound composition are to be converted into a homogeneous foam. The collecting unit receives discrete streams of foamed treating compositions, e.g., in the primary colors, from discrete foam generators each of which is followed by a storing device and by a regulating device, such as a valve which is adjustable by hand and/or by a computer.

Abstract: Apparatus for supplying foam from the outlet of a continuously operated foam generator to a consumer which applies the liquid fraction of the foam to a substrate has a conduit which receives foam from the outlet and contains a storing device serving to take up the surplus of foam when the requirements of the consumer are less than the output of the foam generator and to satisfy the requirements of the consumer when such requirements exceed the output of the foam generator. The storing device contains a compensating device which ensures that the pressure of foam in the interior of the storing device is substantially constant, and such compensating device (which may consist of a reciprocable piston and a hollow piston rod receiving foam from the foam generator) can actuate a monitoring device which regulates the operation of the foam generator, of a pump which is installed between the foam generator and the storing device and/or a valve which can divert foam into a collecting receptacle.

Abstract: A machine, particularly but not necessarily a screen-printing machine, has a rotary screen which is flexible and is liable to deformation out of its normal cylindrical shape. According to the invention an arrangement is provided which internally supports the screen against such deformation.

Abstract: Apparatus is used to uniformly apply liquid treating medium to a textile workpiece by foaming it, depositing the foam in a confined space atop the workpiece, applying suction to the workpiece from below and then, at a location downstream of the suction, squeegeeing additional foam into the surface layer of the workpiece.

Abstract: A rotary stencil unit for screen printing machines has a tubular stencil provided at its opposite axial ends with respective end rings. One or both of these end rings has in its circumferential wall one or more openings which afford radial or diagonal access to the interior of the respective end ring and to the adjacent end portion of the stencil.

Abstract: An applicator for applying a foamed treating medium to a sheet-material workpiece has a chamber through the open top of which the foamed medium is introduced, and an open bottom through which the foamed medium is discharged towards the workpiece to be treated. To assure that the upper surface of the foamed medium in the chamber is always maintained at a constant level, an equalizing member extends across the open top of the interior of the chamber, and a drive is provided which reciprocates or otherwise moves the equalizing member relative to the open top so as to smooth out any portions of the foamed medium which extend upwardly beyond the desired level.

Abstract: An apparatus for applying a treating medium to a screen has a container above the screen and a pipe which discharges foamed treating medium into the container from where an outlet leads to the screen. A foam generator supplies the foam and the pressure at which the foam enters the container can be regulated.

Abstract: A screen printing apparatus wherein a mobile screen is located at a variable distance above the stock and the pool of liquid which is admitted into the interior of the screen flows through the open pores to descend, exclusively by gravity, onto the surface of the stock. Various special effects can be achieved by changing the distance between the screen and the stock, by changing the speed of the screen, by appropriate distribution of pores in the screen, by subdivision of the pool into two or more separate pools, by placing two or more screens one behind the other, as considered in the direction of stock feed, by inserting a squeegee into or by removing the squeegee from the interior of the screen, by oscillating the liquid feeding pipe or pipes and/or the squeegee, and/or by a combination of such undertakings.

Abstract: Apparatus for applying a foamed treating medium to the upper side of a substrate has a screen which confines a system of walls defining a chamber open at its underside adjacent to the screen and including a squeegee which serves to force the foamed medium from the interior of the chamber through the interstices of the screen and into the substrate. The chamber accommodates a reciprocable and/or rotary device for shifting the foamed medium therein so that the medium cannot age and change its color and/or other characteristics prior to application to the substrate.

Abstract: Liquid treating medium is uniformly applied to a textile workpiece by foaming it, depositing the foam in a confined space atop the workpiece, applying suction to the workpiece from below and thereafter mechanically pressing additional foam into the surface layer of the workpiece.

Abstract: A lateral support for a squeegee of an application mechanism of an application machine, has a supporting element arranged to support one end portion of a squeegee, and at least one substantially upright upwardly open guiding element arranged to slidingly guide the supporting element. The supporting element can be guided in or on the guiding element. An application mechanism of an application machine has perhaps a rotary stencil, a squeegee perhaps inside the rotary stencil, and a lateral support including a supporting element and an upwardly open guiding element arranged to slidingly guide the supporting element.

Abstract: A rotary stencil unit for screen printing machines has a tubular stencil provided at its opposite axial ends with respective end rings. One or both of these end rings has in its circumferential wall one or more openings which afford radial or diagonal access to the interior of the respective end ring and to the adjacent end portion of the stencil.

Abstract: A screen printing machine has a printing screen and above the same a roller squeegee including a stationary shaft and a tubular jacket which rotatably surrounds the shaft with clearance. Fluid pressure is exertable on the jacket of the squeegee roller in a direction away from the printing screen to counteract the weight of the jacket.

Abstract: A dot printer has reciprocable plungers and a constantly oscillating drive member. The plungers are held in a normal rest position and are selectively coupled to and uncoupled from the drive member, to share the oscillations thereof when the respective plungers are to print.

Abstract: The apparatus has a gas-permeable support for a web to be printed. Below the support is a suction box which applies suction through the support to the web. Above the support is a flat printing stencil which can be raised and lowered relative to the support. Above and in wiping contact with the stencil is a printing-medium container whose outlet discharges printing medium onto the stencil, to pass through the same and be drawn by the suction of the suction box into the web. The container can move to and fro over the stencil.

Abstract: A dot printer has reciprocable plungers and a constantly oscillating drive member. The plungers are held in a normal rest position and are selectively coupled to and uncoupled from the drive member, to share the oscillations thereof when the respective plungers are to print.

Abstract: A squeegee arrangement has a holder which supports a squeegee member having a squeegee blade. A supporting block on the holder engages and supports the squeegee member. A spring element engages the squeegee blade at or in the vicinity of the longitudinally extending free edge thereof.

Abstract: A stencil printer has a vertical stack of frame-mounted stencils which are supported on one another. Laterally of the stack are arranged holding devices which engage the stencil which is second from the bottom so as to support the stack, while lifting devices are provided which lower the bottom stencil relative to the stack to a printing position and, subsequent to printing, raise it out of the printing position to an intermediate position in which it can be laterally withdrawn from the stack to be placed atop the same. The stack is then lowered by the height of one frame.

Abstract: A stencil printing apparatus for printing a workpiece web at a printing station has a support on which the workpiece web is to be located so that a pattern can be printed on it in a plurality of successive printing operations. A magazine is located above the support at the printing station and accommodates a plurality of vertically stacked flat-screen stencils, and an arrangement is provided for serially withdrawing some or all of the stencils from the magazine, moving them to printing position above the workpiece web, and then returning them serially back to the magazine.