In the forming of cartons, a water-based adhesive, e.g. an aqueous-dispersed polyvinylacetate, is applied as an atomized spray by guns to selected parts of a carton blank of uncoated board and partially dried by hot gas (air) jets, and the carton is erected by forcing the carton blank by a punch through a forming die so that the selected parts are pressed briefly against cooperating parts of the carton to secure them together, by means of projections on the punch and pressure members forming par...

An apparatus and method are disclosed for forming a fibrous workpiece comprised of a layer of randomly disposed fibers and adhesive material dispersed throughout the fibers for binding same upon heating and compressing the fibers and adhesive material to define a unitary pad wherein the apparatus comprises a press having a first and a second platen supported for relative movement toward and away from each other, a first and a second mold supported by the first and second platens respectively wit...

A forming fabric comprising an upper layer which is intended to serve as the paper-forming side and consists of thinner yarns, and a bottom layer which consists of coarser yarns. The two layers are interconnected in that threads form the upper layer alternately pass downwardy to interweave with the bottom layer and in the upper layer replace one another in such a manner that together these threads form the same weave pattern with the upper layer as the rest of the yarns in that layer, which yarn...

This invention relates to apparatus for forming shaped pieces. One embodiment useful in forming metal parts, such as fins for use in the compressor section of gas turbines, comprises apparatus for use with a flat-surfaced die having a forming die depression in the upper surface, which has a pair of cylindrical rolls oriented with their axes parallel and positioned one above the other between the flat surface of the die and the lower surface of a downward acting hydraulic press, with the rolls si...

A process for producing an extrusion of small cross section from a workpiece in which the workpiece is subjected to a bulk compressive stress in a container so that the end of the workpiece is forced into a reducing die at the end of the container. The material of the workpiece in the reducing die is subjected to an additional localised compressive stress by a tool member having a working face which is applied to the material of the workpiece in the reducing die. Under the combined compressive s...

1. Apparatus for the compressive forming of an article comprising: A die including A. a die cavity, B. a workpiece receiving chamber connected with and angularly disposed with the die cavity and C. port means in a wall of the die cavity and distinct from the workpiece receiving chamber; A soft metal matrix contained within the die cavity; Means to introduce a workpiece into the die cavity; Force means to press the workpiece into the die cavity; and Control means to control the rate of release of...

An upstanding hollow rivet is formed in a metal can end by pressurally engaging opposite sides of the can end with a pair of die elements, one of which is formed with a recess. The dies place a continuous zone of the can end under compressive stress sufficient to cause metal of the zone to be forcibly displaced into the die recess with consequent thinning of the compressed area whereby an integral rivet is formed which comforms to the size and shape of the die recess.

The invention relates to a method for producing gear forming rolls. Gears can be manufactured by rolling and squeezing blanks between forming rolls, but in practice the exact shape of the teeth in the rolls is not given to the gear being rolled. Thus, to produce the desired tooth profile on the finished rolled gear, the tooth profile of the forming roll must be modified. The invention provides a method for producing forming rolls for roll forming gears, which comprises rolling an accurate finish...

A method of and apparatus for making packets, the method comprising folding the packet material round a former, securing the packet material to form an open-ended packet, collapsing the former so as to allow easy removal of the packet from it, and blowing the formed packet off the former by means of one or more jets of air.

A sheet of material is placed over a die cavity. A ram made of malleable material, such as lead, forces the sheet into the cavity. The force of the ram, progressing inwardly from the edges of the sheet toward the center of the cavity, moves the sheet downward and inward into the cavity, without appreciable change in the thickness of the material at any point. The sheet may thus be worked in cold condition, either in one or a succession of steps, without requiring heat treatment.