Abstract: An apparatus for forming the edge of containers of synthetic thermoplastic material which are open at the top and terminate in an outer flange which is arched upwards from the top and then extends downwards. The apparatus includes an edge moulding unit having four groups of three female moulds and the same number of male moulds, a rotating plate for the female moulds designed to rotate step-by-step to cyclically carry each group of moulds from a charging position, through a moulding position to a discharge position and a cooling position. A feed device having one or more groups of parallel heated screw-threaded rotating rollers are provided, each engaging a portion of the flanges of a sequence of containers in order to heat them and transfer the same from a stock of containers to the charging position. Compressed-air-nozzles are arranged to cause the container to move from the feed device to a female mould.

Abstract: An apparatus for obtaining a negative pressure in chambers formed by a flat extractor plate supporting frustoconical or truncated pyramidal objects thermoformed from a sheet of synthetic material, embodying a flat extractor plate for hollow frustoconical or trucated pyramidal objects which when resting their rims on the flat surface of the extractor plate form chambers, wherein a suction unit is connected with said chambers by means of a pipe and a connecting cavity and wherein are provided a shut-off valve and an air intake(20) adjustment valve between the unit and the said valve, wherein each chamber is provided with at least one intake for atmospheric air into the chambers (17), wherein the cross-section of the intakes (20) is variable.

Abstract: A cup for coffee, or similar drinks, formed of synthetic thermoplastics material comprises a portion (3, 3', 3") provided with a base (5, 5') and a shoulder (7) having a collar (8, 8') ending in a flare (14) at the top (9) of the cup, a portion (4, 4', 4") running from this top which is provided with a shoulder (11) which is, in turn, connected to a lower edge (13) by means of a section of wall (12, 12'), in which the shoulder (7) rests at least partly on the flare (14) in a plane other than that which includes the top (9) of an identical cup placed beneath it.

Abstract: An inlet checking device for a stacking channel comprises at least one jaw provided with at least one inclined plane and a check groove, the jaw being located in a recess of the channel structure, and further comprising at least one jaw loading spring and control mechanisms for adjusting the radial projection of the jaw inside the channel.

Abstract: A yogurt container and a cover therefor obtained from a sheet of thermo-plastics material, wherein said container comprises a hollow frusto-conical body, radiused to a flat edge by means of at least an annular step-like-projection and by means of a side wall portion, and wherein said cover being nestable in the container above said body comprises a peripheral wall and a central handgrip. The side wall portion is formed of an upper part downwardly frusto-conical and of a lower cylindrical part. A plurality of recesses are provided inside the container in the region where said cylindrtical part and said frusto-conical part join together, each recess being formed of a base and of an upwardly tapered wall and being a spacer between stacked empty containers.

Abstract: The object of this invention is a lid of truncated pyramidal shape made of thin transparent synthetic material to be used a-top a tray containing eggs, the object of this lid it to facilitate film wrapping of tray. Said lid is equipped with features to ease its placement on to the tray, provides for the avoidance of displacement and arching of its lateral walls during film wrapping; with features which would insure a stable and protected position of the eggs via small anti-shock air pockets; with features which would prevent the impaction of empty lids one to the other when stacked.

Abstract: The improved container, obtained from a sheet of synthetic thermoplastic material, which is particularly suitable for eggs, is made in two portions (10,12) which are held together by rib (13) and can be folded down so that one closes on the other by means of pressure fastenings (14,22). It is provided with damper-ribs (25) which protect the eggs from breakage due to accidental impacts against the sides of the walls of the recesses (11) in which the eggs are placed and when portion (12) thereof is constructed as a lid without recesses it has ribs (34,35,36) in a particular location on the lid which confer satisfactory rigidity which is perceptible when the container is being closed or when it lies at the base of a stack of containers, for example on a display shelf.

Abstract: A label for trays or containers for eggs or the like made of cardboard or similar material which has a substantially rectangular central body (23) with rounded corners is provided with at least one extension (27) which can be folded along at least one of the sides of its central body, is provided with radially intersecting cuts (25) forming tabs (24, 24') and/or holes (24"), which may also only be premarked, and can be glued to the lid of a container to form air cushions (37, 37') which protect the products which are subsequently held in the container and permit empty and open containers to be stacked.

Abstract: The invention relates to a matrix mold, in which at least one mold cavity is bounded by the head of an ejector at the lower opening of a cup, from which in the substantially truncated conical wall of this cup, widening upward, facing the interior, by at least two grooves in the lower part of the cup and by teeth disposed in the interior of these groove, which are radially slidable in a radial direction by an eccentric arrangement, and in which the diameter of the head is greater than the smallest diameter of the mold cavity.

Abstract: The invention applies to thermoforming apparatus with presses in which the objects are formed and cut in one unit and relates to an extractor for removing the objects from the presses and setting them down elsewhere, among other places in the channels of a stacker. The extractor consists of a movable plate (12) provided with channels and holes for supplying adjustable suction and compression by connection to a vacuum and compressed air unit in order to extract the objects (13) from the recesses in a die (9) and to transfer them to a stacker (26).

Abstract: A container having closure guide members for eggs, fruit or like products, which container is constructed from a sheet of synthetic thermoplastics material and is formed of two parts or portions (9, 10) held together by a flat spine and by two grooves (15) bounding the spine, and having recesses (12) to house the products in at least one of the parts (9, 10) which have mating ledges (22, 22', 22", 22'") and cylindrical spacers (38), the said parts (9,10) being capable of being closed together by means of pressure closure members (16, 17) in such a way that the said mating surfaces are in contact with each other, in which the closure guide members consist of ramps (32, 32', 34, 34', 36, 36') made as a continuation of the grooves (15) on the parts (9, 10) and on the spine (14) and also in which the spacers (19') in the cover (10) are of a height corresponding to the height of said cylindrical spacers (38).

Abstract: Crystalline polystyrene is thermoformed by extruding molten material into a temperature controlled roller press having press rollers and draw rollers separated by a support roller. The buildup of sheet between the support and draw roller is controlled. The edges of the sheet are heated and then gripped by a first set of sprockets and a second set positioned past the thermoforming device. The gripped sheet passes through a heating device where both sides of the sheet are heated before the intermittent action of the press.

Abstract: In a moulding apparatus for producing a plastics material container matrix, a lower mould member defining a bore from its lower surface to its upper surface, die means slidably displaceable within said bore for deforming said plastics material, cutter means slidably displaceable within said bore defining at least one cutting edge extending obliquely to the longitudinal axis of the cutter means, and an upper mould member having a pressure member displaceably mounted thereon, the lower surface of the pressure member defining a cavity aligned with said bore in said lower mould member, which cavity receives at least a portion of said cutter member and die means when they are displaced.

Abstract: An automatic device for extracting stacks of finished hollow articles from a stacking station of a heat moulding apparatus. A plurality of vertical rods, rotatable about their longitudinal axes for engagement with stacks of finished articles, are mounted for vertical and horizontal displacement. Control means are provided for controlling engagement and disengagement of the stacks of articles and for controlling vertical and horizontal displacement of the rods in a predetermined sequence.

Abstract: A system for the production of hollow finished objects, formed from a strip of plastic material by heat moulding, utilizing a process comprising the phases of feeding the strip, heating the strip, heat moulding from the strip and cutting therefrom the hollow objects in only one station, extraction of the finished hollow objects with stacking thereof, and arrangement of the remaining strip material from the process, in which the inoperative time of the heat moulding cycle is slightly greater than the cutting time added to the feed time of the strip in the heat moulding station.

Abstract: An elongated shape or strip from which packing cases may be made is formed as a hollow section of plastic material, the secton having outer walls and inner interconnecting and strengthening walls. The general form of the section may be flat, rectangular, polygonal or triangular, and the inner and outer walls may be of differing thicknesses. Preferably the outer sides of the shape are smooth or curved, and a packing case may use several different sections, all of plastic material or some of wood or metal.