Abstract: The invention proposes a polyurethane assembly foam which is produced by foaming a mixture in which, before the completed foaming, there are brought together a solution of the propellant of the foam, a prepolymer of polyurethane, a reaction resin and, if need be, parts of its reagent with components kept separate from the solution until the final foaming, namely the reagent or individual ones of its components as well as possibly hardening accelerators of the polyurethane. The apparatus includes an outer pressure tank for the reception of the solution and an inner pressure tank for the separation of the components of the solution and a ram, movable from outside for perforating the inner pressure tank and permitting mixing of the contents of the tanks prior to release of the solution.

Abstract: The packaging of fresh fruit and vegetables is effected in a package at least part of which is made of a transparent film of a polymeric material. The film has a high rate of gas permeability and is impervious to the ingress of bacteria. As the fruit and vegetables continue to respire in the package an atmosphere is set up inside the package which serves to retard spoilage, mould growth and flavor deterioration, thereby providing the package with a longer shelf life than an open receptacle. The film is preferably polymethyl pentene and may form all the container or a lid to a rigid receptacle.

Abstract: A method of maintaining proper tension in belt or chain drive systems comprising attaching one end of a tensioning assembly to a mounting surface so as to permit unrestrained pivotal movement but negligible axial movement and positioning the opposed end adjacent the drive system belt or chain. A torquing tool is then applied at the mounting point and the assembly is rotated about a central axis until a predetermined torque value is attained and the assembly is locked against pivotal movement. The tensioner for carrying out the method includes an elongate arm with an idler pulley attached to one end. The opposed end receives a mounting member for securing the arm to a supporting surface first in pivotal relationship thereto and then in locked relationship. The mounting member also serves as a torquing member for applying the predetermined torque value.

Abstract: A liquid dispensing combination includes a mounting unit having a base and a cover. A dispensing unit including a supply reservoir and a spring load pump and nozzle is supported on the base and has a portion which projects through and is accessible from the bottom of the base and cover so that the dispensing unit can be moved upwardly relatively of the mounting unit to depress the pump and dispense a variably predetermined amount of the contents through the nozzle.

Abstract: An improved punching tool having a long wearing characteristic and characterized in having at least first and second punching edges disposed on the leading end of the punch body wherein these punching edges are separated by an annular groove and wherein the trailing punching edge is slightly smaller in diameter than the leading punching edge.

Abstract: The invention is concerned with the production of pencil leads and also pencil leads as produced by the proposed method. In accordance with the invention, graphite, enamel frit and quartz flour, preferably at least approximately in a ratio of one part of graphite, two to four parts of enamel frit and one part of quartz flour, are processed to form a starting mixture which is then pressed into the form of a lead, is dried and is fired. The invention renders it possible to perform sintering below a temperature of 550.degree. C. and, accordingly, to perform the sintering firing operation in a normal oxidizing atmosphere.

Abstract: A hydrocolloid laminate (10) useful as a wound dressing. The laminate product comprises a lower layer of hydrocolloid adhesive (11), an upper layer of flexible open-cell polymer foam (12), first film layer (13) interposed between the adhesive layer and the foam layer and second film layer (14) provided on the foam layer on the side (17) opposite the first film layer.

Abstract: A method of forming a deep-drawn and ironed container having a bottom profile wherein a cup is formed by drawing an inverted cup and reverse drawing the cup and simultaneously imparting a bottom profile thereto while controlling the thickness of the material in the bottom. The method also includes providing support to the profiled bottom while ironing the cup thus formed. The method is accomplished by a system which includes a draw-redraw station wherein the inverted cup is adjustably held by a fluidly actuated lift out ring and draw pad in the bottom area against a punch during reverse drawing to control metal thickness in the bottom. A separate pressure sleeve is also engaged with the profiled bottom during ironing to prevent pulling material from the bottom.

Abstract: A method of forming a container end piece includes blanking a work piece from a sheet of material and forming an inverted cup therefrom by wiping the peripheral edge of the blank over a die core ring. The inverted cup is then reversed by advancing a punch core and a punch core ring simultaneously to form a cup having a flange area, a central body area and a chuckwall area interconnecting the flange and the bottom. The punch core ring is then advanced ahead of the punch core to shorten the chuckwall area and reduce the radius between the chuckwall and the central bottom portion. The method also includes engaging the flange area of the reversed cup by a pressure sleeve which moves downwardly with the punch core ring during the final forming of the chuckwall.

Abstract: A fluid dispenser for use with a source of fluid having a flexible, valveless dispensing tube includes a base unit for support of the fluid source and a closure member normally closing off the end of the tube. The dispenser carries a cam and spring assembly which, upon the application of the hand pressure, moves a roller into engagement with the tube and moves the closure member out of engagement with the tube to open the end thereof and permit the fluid to be ejected therefrom.

Abstract: A method of forming a container end panel having a countersink radius and a chuckwall including preforming the radius and the chuckwall so that the chuckwall includes a straight wall portion tangent to the radius and reforming and reducing the radius without tooling restraint while holding pressure against the straight wall area. Apparatus for performing the method includes a punch core and a cooperating die core ring having complimental geometry for forming the chuckwall and radius configuration. The article formed by the method and apparatus includes an end panel having a straight wall portion between the normal tapered wall portion and countersink radius.

Abstract: A method of forming container end panels includes first forming the bottom outer panel and then preliminarily forming the chuckwall and countersink radius by pulling material from the peripheral edge area with a punch core. The countersink radius is finally formed by partially retracting the punch core from the radius while holding the chuckwall to wrap some of the material in the radius upwardly. The apparatus includes an outer punch core with a tapered nose which preliminarily forms the chuckwall and countersink radius and then is retractable from the radius while holding the wall during final forming of the radius.

Abstract: A pressing tool for producing dish-shaped pressed objects, in particular plates, cups, bowls, etc.

Abstract: A method of forming a container in one or more double acting presses includes the steps of blanking, drawing an inverted cup and reverse drawing the inverted cup while retaining a flange thereon at a first station and then transferring the cup to a second station where the cup is drawn to an inverted configuration and then reverse drawn to form a finished container again retaining the flange throughout. The drawing operations at each station are performed in a single stroke of the press. The apparatus at the first station includes a blank and draw punch and a fixed, hollow die core ring with the punch telescoping over the ring to form the inverted cup and a draw horn telescoping within the ring to reverse draw the cup. The apparatus at the second station includes a hollow redraw sleeve and a pressure sleeve telescoping over the redraw sleeve to invert the cup and a profile punch telescoping within the redraw sleeve to reverse draw the cup.

Abstract: A method of processing hydrocolloid adhesive material includes the steps of extruding a sheet of the hydrocolloid adhesive material from a vacuum extruder, applying a liner of release material to at least one side of the sheet, under pressure, and while the sheet is at an elevated temperature and maintaining the liner and the sheet under tension during cooling of the sheet.

Abstract: In an access card having coded material which comprises a plurality of markings which under infrared radiation appear on an infrared receiver, it is provided in accordance with the invention in order to prevent counterfeiting that a continuous and transparent plastic foil or film blank (4), at least on a portion of its surface, has a layer (4a) that is not transparent to visible light and is transparent to infrared light; together with a substrate (5), the blank embodies a laminate which on its inside carries a photosensitive layer (7) covered by a layer that is transparent to infrared light. The markings (21-23) appear as a negative or positive on the photosensitive layer (7) as the result of exposure of the plastic foil or film blank (4) to light.

Abstract: In an apparatus for producing, by the casting technique, a cooling means for narrow webs between adjacent cylinders in a cylinder block, separate cores are provided which are fitted at both ends into a water jacket core or into the bottom core in order to form cooling water channels in the webs. The cylinder blocks produced by the apparatus have in their web areas cooling water channels which are connected with the water jacket.

Abstract: In a method for the radial expansion of rings, in particular by means of rolling tools, it is provided in accordance with the invention that the radial surfaces and the end faces of the ring that is to be machined are machined in alternation using the same pair of tools. The apparatus for performing the method includes a ring rolling machine in which the ring that is to be formed rests on a support that is pivotable by 90.degree. to alternatively bring the radial surfaces and the end faces of the ring into engagement with the tools.

Abstract: A combined package and display system for fabric goods includes a transparent or translucent polyethylene package, heat sealed or otherwise secured about its periphery, containing the goods and suitable advertising material. Where the product is, for example, a tarpaulin, also of polyethylene and having grommets about its periphery, and the package is formed so that its top edge is constructed as a means for attachment to a supporting surface and contains grommets of similar material and strength as those contained in the product itself. In this way, the package can be mounted for display purposes by its grommets, while the nature and quality of the grommets of the goods can be tangibly observed and felt by the prospective purchaser.