Abstract: Apparatus for continuously producing an elongated strip-like fastener member is disclosed which facilitates highly efficient formation of the fastener member with a great multiplicity of resiliently flexible hook-like projections. The method comprises the formation of an extrusion of plastic material which is shaped between a pair of coacting first and second rollers of the apparatus. Notably, one of the rollers is formed of a series of plates and defines a plurality of hook-forming cavities about its periphery within which the hook projections of the fastener member are formed. The forming roller is suitably cooled so as to effect substantial reduction in the temperature of the molten plastic extrusion form which the fastener member is formed. In this manner, the fastener member may be removed or stripped from the forming roller without opening of the hook-forming cavities, thus promoting highly efficient formation of the fastener member without resort to unduly complex equipment or processes.

Abstract: For eliminating burrs which form on moulded, or injected products, a moulding device and, in particular, a tire-vulcanizing mould, is provided with a plastically and elastically deformable portion on the coupling surface between the corresponding elements. The coupling, between the facing surfaces, is not simultaneous, but involves a portion of surface having an amplitude that increases in its size, during the shutting movement of the mould.

Abstract: An extrusion die for two-ply seamless plastic tubing, includes an extrusion head with a first nozzle provided with a first centering means; a first hollow mandrel placed within said nozzle; an elongate carrier bearing a second mandrel, a second nozzle and a spider in turn supporting a distributor splitting an extrudate. The first nozzle and the distributor define a first annular extrusion orifice for an outer parison of the tubing while the second nozzle and the second mandrel define a second annular extrusion orifice for the inner parison of the tubing. A threaded member longitudinally adjusts said carrier to vary the size of the first extrusion orifice. A coupling means interconnects the carrier and the first mandrel and allows only the axial, without rotation, movement of the carrier. A second centering means mounts the distributor uniformly spaced around the spider.

Abstract: The present invention relates to an apparatus and a method for extrusion of plastic or pulverulent materials having been prepared for the purpose for obtaining an extrudate in the form of rod shaped bodies, whereby the apparatus comprises an annular perforated screen (8), a rotor (10) being rotably arranged on the inside of said perforated screen (8), The rotor (10) is provided with a number of compression surfaces (14) working in close rotation to said perforated screen (8), which surfaces (14) are arranged with an acute angle with said perforated screen (8) in their rotational direction.

Abstract: A label printer for printing data on a label attached on a long ground paper by means of a thermal head opposed to a platen. The label printer includes a ground paper feeder constituted of a drive roller and a pinch roller for sandwiching the ground paper therebetween. The drive roller stretches the ground paper with slip generated between the drive roller and the ground paper to peel off the printed label from the ground paper by means of a peeling plate and to issue the same. The surface of the drive roller is provided with a wear resistance to prevent wear of the drive roller and thereby to prevent change in the outer circumference of the drive roller. Accordingly, the ground paper may be stretched by the paper feeder under always fixed conditions, and the label may be reliably peeled off by the peeling plate.

Abstract: A mold clamping device includes a frame, a fixed base for supporting a first mold, the fixed base being fixedly mounted on the frame, a movable base for supporting a second mold, the movable base being movably mounted on the frame in confronting relation to the fixed base, first means on the frame for driving the movable base to move rectilinearly toward and away from the fixed base, a cam follower supported on the movable base, a cam supported on the frame and having a cam surface held in contact with the cam follower, and second means for driving the cam in a mold clamping stroke to displace the cam follower for enabling the movable base to clamp the second mold firmly against the first mold on the fixed base, the cam surface being defined by a cam follower displacement curve having a gradient which is greater at an initial stage of the mold clamping stroke and becomes smaller as the mold clamping stroke progresses.

Abstract: A two-part mould for moulding an article has the mould parts adapted to be moved together under vacuum to cause moulding material to be evenly distributed around a reinforcement structure. Sealing means for sealing the mold cavity against ambient atmosphere, comprises a primary seal operative during the movement of the mould parts, the action of the primary seal being assisted by a secondary seal which becomes effective when the mould parts reach the final closed position. A collection chamber is formed in one of the mould parts for collection of surplus resin through pinch-off means, including a flexible part, which closes off flow of resin into the collection chamber in the closed position, of the mould parts. The collection chamber is preferably located to permit drainage of resin back to the mould cavity until the pinch-off means becomes effective.

Abstract: Apparatus for the production of spherical portions of ice-cream. The apparatus includes means forintroducing an ice-cream mixture having a creamy consistency into a hemispherical lower mould in a sufficient quantity to fill the mould and form a protruding cap having the same volume as that of the mould;means for smoothing the protruding cap into the shape of a hemisphere being a smoothing tool comprising a portion of the generatrix of a hemisphere which describes on rotation a hemispherical shape;means for freezing the completed sphere of ice-cream; andmeans for removing the sphere of ice-cream from the mould.The smoothing tool has the shape of a hemisphere, onto the crown of which there is fastened an extension piece, its generatrix being perforated in between some remaining segments.

Abstract: A casting frame structure of a centrifugal casting machine which comprises a hollow rotary drum in a concrete-slurry charging space is formed, a rear-end plate replaceably attached to the rear end of the rotary drum, a front-end plate replaceably attached to the front end of the rotary drum and having a feeder opening through which a concrete feeder is inserted into the concrete-slurry charging space of the rotary drum, a plurality of outer frames and/or a plurality of cores mounted on the inner surface of the rotary drum defining a plurality of concrete-slurry casting spaces therebetween each of which is open to the concrete-slurry charging space.

Abstract: A mold for forming a window assembly which includes a transparent glass sheet and gaskets formed by curing a polymeric gasket material in situ on the glass sheet to encapsulate a marginal peripheral edge portion thereof. A glass sheet to be utilized in a vehicle door has a front edge, rear edge and a lower edge to each of which is adhered such a gasket. In addition, a bracket means for attachment to a scissor linkage for raising and lowering the window can be secured to the lower edge of the window. The gaskets are formed in the mold with the transparent sheet and bracket means, typically by a reaction injection molding process. Each of the front and rear gaskets may have a flange portion thereon for insertion in an opening in a gasket attached to a frame of the window opening in the vehicle door.

Abstract: Apparatus for producing novel three dimensional shaped frozen confection products on a stick. A molded slug of frozen confection having a generic shape is converted into a three dimensional frozen confection having any desired shape including shapes having variable cross-sections and undercut portions. The desired final shape is formed by the application of pressure to the slug, without significant melting of the slug, using a split mold which defines the final three dimensional shape by controlling the temperature of the slug and the relative size and shape of the slug and mold cavity.

Abstract: A press for the preparation of raw plastic material blanks is described. It has a feed device connected to a rotor housing in which a circular rotor is eccentrically supported for the generation of pressure and the transport of the material. Rotor housing and rotor form a tapering channel. The circular rotor has at least one axially extending material transport ridge forcibly guided along a guide rail located in the rotor housing. At its smaller end the tapering channel forms an extrusion gap which opens into an outlet opening for the plastic material, to which a nozzle is attached.

Abstract: The spraying equipment is arranged at a station provided with means for opening and closing the die, e.g. at a preheating station of a plastic injection molding installation. The equipment comprises a spray arm with nozzles, movable, e.g. hydraulically in horizontal and vertical directions, which arm is connected to a spray medium supply. This supply as well as the drive of the spray arm, is automatically controlled via the computer of the injection molding installation in such a way that with the die open, the spray arm is automatically moved into operating position between the die parts and is manufactured in accordance with the tool data picked up by the computer. After completion of the spraying the arm is retracted into an inoperative position outside the die. Operating personnel is superfluous.

Abstract: An automatic die exchanger for an injection molding machine is provided, having a rotational table and a travel member capable of approaching and separating from a die mounting section of the injection molding machine. A convey means provided on the travel member is engaged with and disengaged from one of the dies on a plurality of die placing sections of the rotational table. When the travel member is moved, the convey means feeds the die engaged therewith to the die mounting section or removes a die therefrom.

Abstract: An improved apparatus and method for making a fast thermal response mold is disclosed. The apparatus has a plurality of rows with each row having a plurality of cavities. Each cavity in each particular row is interconnected by bores to allow a thermal medium to pass therebetween in a serpentine manner. Each cavity has a sleeve fixed therein and adapted to fit a mold. The sleeve eliminates the need for O-ring sealing means utilized in prior fast thermal response molds.

Abstract: A vacuum forming apparatus for fixing and shaping animal tissue into the shape of a cardiac valve prosthesis, including a tapered form, with elongated through apertures, suspended in a reservoir of fixative and vacuum means for producing a reduced pressure within the tapered form.

Abstract: A metal pin for forming gelatine capsules, having a work-hardened surface including a circumferential groove, even the surface defining the groove being work-hardened.

Abstract: Disclosed is a hub replacement device for use in vehicle tire retreading processes. An envelope is sealed against the tire carcass sidewalls to provide an environmental seal of the new tread on the carcass crown during the vulcanization process. Three arcuate rigid plates, each with a pair of ribs, are installed between the carcass beads, for supporting the beads, a predetermined distance apart along a majority of the bead circumference. Integral with each support plate are pairs of opposing toggle clamps with hooked ends. A pair of annular discs are located on each side of the tire for applying a compressive force on the envelope against the carcass sidewalls. The annular discs are each equipped with pairs of anchor loops to which the hooked ends of the toggle clamps are releasably engaged.

Abstract: A compression molding apparatus comprising a rotary compression molding means, a material feed means and an article carrying means.

Abstract: Apparatus for producing frozen confections includes a plurality of metering pumps which equally divide a flow of semi-solid confectionary material into a like plurality of flows and delivers such flows to a like plurality of forming heads. The forming heads are reciprocated along a generally diagonal axis relative a conveyor during formation of confectionary products and in the opposite direction upon completion of formulation. The speed of translation in one direction is preferably distinct from the speed in the other direction. If desired, such flows may be combined with other unidirectionally flowing material to form a layered product. A cutting wire severs the flows of combined confection material into a desired length product in timed relation to the reciprocation of the forming heads. The individual products are received on a moving conveyor which transports them to the next operating station.