Abstract: An apparatus for manufacturing plastics items provided with external undercuts, comprising at least one compression molding unit, which is composed of an upper male mold part comprising a plug and of a lower female mold part aligned, along a vertical axis, with the male mold part, means for actuating the mold parts between a spaced position, at which a dose of plastics sufficient to form an item is deposited in the female mold part, and a mating position for producing the compression molding of an item, the male mold part comprising a plug and an ejector that is associated with the plug in order to remove the molded item when the mold parts are in the spaced position, further comprising a bushing that is arranged externally and coaxially to the plug, a plurality of sectors for forming raised portions and undercuts on the outer surface of the item, the sectors being coupled axially to the bushing and being able to expand with respect to the plug, means for actuating the sectors between a position that produces

Abstract: A method for feeding automatically metal profiles in bar form entails gripping a group of the metal profiles from a magazine for collecting the profiles and transferring the group of metal profiles or their end to a raised position. The raised metal profiles are arranged on a movable transfer device provided with means for separating the metal profiles, at which the initial portion of a preset number of metal profiles to be fed to the machine at each work cycle is conveyed transversely and counted. The metal profiles are transferred, in the counted number, at receiving elements of the machine, while the excess metal profiles are unloaded inside the collection magazine.

Abstract: A bar guiding device in a feeder for feeding a machine tool, composed of two elements that have respective slots and can move with respect to each other between an open position, which allows insertion of a bar between them, and a mutually adjacent position, at which the slots form a longitudinal channel for advancement of a bar to be fed to the machine tool by way of a bar pusher connected to an actuation chain that is external to the channel by means of a bridge that is guided through regions where the elements mate, the regions being in mutual contact, so as to close the channel, and undergoing elastic deformation in order to allow passage of the bridge between them.

Abstract: A bar feeder for feeding an automatic lathe, comprising a bar magazine and a guide supplied by the magazine, a facing device being associated with the end of the magazine that lies opposite to the end that is adjacent to the lathe and being suitable to machine the rear end of the bar on which the bar pusher engages.

Abstract: A self-adjusting braking device for weft feeders, comprising a frustum-shaped braking body that acts on a thread, is suspended elastically in front of the drum of the feeder and is pushed into elastic tangent contact with the drum along an exit circumference of the drum. The braking body has, at a larger-diameter region thereof designed to make contact with the drum, a discontinuous annular contact element, with a plurality of through slits which are arranged so as to be equidistant and delimit a row of contact laminas.

Abstract: An injector particularly for a vacuum die-casting apparatus, comprising an injector body provided with at least one first opening for injecting/aspirating a protective gas and at least one second opening for loading molten material, which are arranged in order of operation. The injector body is further provided with a chamber for containing material and for the sliding of a piston for pushing the material into a die. The injector also comprises elements for cleaning and lubricating the external surface of the piston which are arranged in order of operation on a corresponding supporting element which is separate from the injector body.

Abstract: Method and device for resetting the position of pins in trays with pins for supporting objects to be clad inside presses, comprising a tray arranged on a substantially horizontal plane and in which there are multiple receptacles having a substantially vertical axis, each receptacle accommodating a pin provided with a head protruding from the upper face of the tray. The pins form with their heads a supporting surface for the lower face of the object to be placed in the press. Each pin has elastic means that keep the pin in a raised position and are flexible so as to allow the pin to pass from the raised position to a lowered position or vice versa. The method consists in making the tray slide along a resetting surface having, along its extension, a region raised with respect to a plane that is parallel to the plane of arrangement of the tray.

Abstract: A device for connecting and insulating a thermal protector for electrical winding of motors, comprising a tray-like shell made of a plastic material, which contains the protector and is provided with one or more terminals for electrical contact with the power supply of the motor to which it is applied; the contacts protrude from the shell, which has one or more tabs and locators which are applied by anchoring, in suitable and complementary regions of the spools of the windings of the motor enclosed in a plastic cover.

Abstract: A device for smoothening the unwinding from the cylinder of the loops of yarn of the weft reserve in weft suppliers for fluid jet looms, is described. The device comprises a pneumatic device capable of subjecting the yarn to a fluid flow, such as an air stream, having at least one motion component directed in the running direction of the yarn. The flow, independently from the dimensional and superficial characteristics of the yarn, maintains the latter constantly under mechanical tension, so that the slackening of the loops wound on the terminal portion of the cylinder of the supplier is prevented.

Abstract: A mattress packaging machine with an automatic roll replacement device for automatically replacing a roll for feeding a sheet for wrapping the mattress, having: a horizontal frame upon which the mattress slides; a sheet guiding mechanism so the sheet is arranged over and under the mattress; a sheet joiner and cutter after the mattress is wrapped; a sliding carriage with feed roll supporting assemblies for unwinding and takeup of a respective sheet and with a transferable take-up roll with which an end of the sheet is connected.

Abstract: A device for manufacturing, in particular, plastic caps for closing containers, comprising molding units, each of which is composed of a male mold part and of a female mold part. The male mold part has a punch which is directly provided with compressed air which exits through ports, so as to cause the separation of the cap from the punch and facilitate the removal of the cap.

Abstract: A device for reducing the permeability of tubing in climate control, air conditioning and refrigeration systems, comprising elements for recovering gas escaped by permeation from at least one tube that is at a first temperature and pressure, adapted to convey the permeated gas to a region of the system that is at a second temperature and pressure, the second pressure being lower than the first pressure.

Abstract: A tool for facilitating operations for removing and fitting tires on wheels consists of a lever element provided, at one end, with a grip and maneuvering region and, at the opposite end, with an element for resting on the wheels and for acting as a fulcrum and with an element for mutually spacing the wheel rims and the tire beads that can be wedged between them.

Abstract: A prefabricated concrete panel for industrialized building, with high thermal and/or acoustic insulation, comprising a first sheet and a second sheet which are embedded in the concrete body of the panel and face each other on planes which are parallel to the planes of arrangement of the two larger faces of the panel. At least one of the sheets is made of thermally insulating material and the sheets delimit, therebetween, an air chamber which is divided into a plurality of mutually connected recesses in order to increase thermal and/or acoustic insulation of the panel.

Abstract: A supporting device for prefabricated units, particularly for buildings having a metallic structure, comprising a main body which can be fixed to an outer face of a first unit and a supporting element which forms, with one of its portions, a resting region for a second unit to be connected to the first unit. The supporting element is detachably associated with the main body and can be moved along the main body in order to vary the position of the resting region with respect to the first unit.

Abstract: A high-voltage level shifting circuit with optimized response time, comprising: an inverter having an input and an output, the inverter being connected between a first voltage and a second voltage whose difference remains constant over time; a resistor, in which one terminal is connected to the first voltage and a second terminal is connected to the input of the inverter; a high-voltage transistor, which is connected between the second terminal of the resistor and a current source whose switching on and off determine the level shifting of a digital signal; and a clamp transistor, which is connected between the first voltage and a node that is common to the resistor and to the high-voltage transistor. The gate terminal of the clamp transistor is connected to the output of the inverter.