Abstract: A method and an apparatus are provided for producing sequences of coil springs of more than one configuration, such as those differing in stiffness, shape, size or other property. At least two coiling stations are provided around different positions of a rotary index mechanism that has a plurality of angularly spaced spring holders that are sequentially moved through and rest simultaneously at a plurality of forming or other treating stations around a central axis. The coiling stations alternatively deliver coiled springs to each holder, while one or more post forming stations, preferably including two knotting stations and one heat treating station, sequentially operate on each of the springs of the different configurations. A transfer station transfers finished springs to a conveyor that transfers programmed sequences of springs, row by row, to a spring interior assembler. The stations are controlled to simultaneously perform different operations on different springs, including different types of springs.

Abstract: A spring core for a mattress consisting of a plurality of side-by-side rows of identically configured helical coil springs each made of a single piece of wire having a central portion of a first radius defining a central spring axis and terminating at opposing ends with unknotted upper and lower end turns disposed in planes substantially perpendicular to the spring axis. The springs are connected with each other at their upper and lower turns by connecting lacing wires. The upper and lower turns are each substantially U-shaped, having a longer relatively straight leg and a shorter arcuate leg located at the free end of each end turn, the legs connected to each other by a base web. The radius of the shorter arcuate leg is substantially less than the first radius of the central portion of each coil spring. All the coil springs are oriented in the same direction, except along an edge region of the spring core.

Abstract: A spring interior forming method and apparatus provides a spring interior assembler and a coil row transfer station upstream of the assembler having at least one conveyer extending therethrough. A coil former is provided at an upstream end of the conveyor and is operated through a plurality of cycles, each to feed one spring coil onto the conveyor. In one embodiment, a single former is provided with a single conveyor extending therefrom through the transfer station. In a second embodiment, two such coiler-conveyor combinations is provided. In a third embodiment, one conveyor through the transfer station is provided with two coilers, each having a feeder preferably in the form of a conveyor, that selectively feed spring coils, which may be of different types, to a cross-over station for feed onto the transfer station conveyor. In a fourth embodiment, each coiler accumulates springs at its output while awaiting queing by the cross-over station.

Abstract: A pocketed coil spring assembly for use in the manufacture of mattresses or cushions or the like comprising a plurality of longitudinally extending strips of integrally connected closed fabric pockets each containing at least one helically coiled wire compression spring having its axis disposed transversely of the strip, and wherein each of the strips contains a single band of interconnected springs formed from a single length of wire into a plurality of interconnected helical coil springs. In the preferred embodiment of the invention, each strip of spring containing pockets is spaced from each adjacent strip by a ply of resilient foam material, and each of the plies of resilient foam material are secured to the sidewalls of adjacent strips.

Abstract: A grid frame for a spring assembly comprising a border wire transversely and longitudinally-crossing line wires, and spring wires disposed between adjacent line wires either transversely of the frame or longitudinally thereof.

Abstract: A spring assembly wherein there is a rectangular border wire and there are coils disposed in spaced, parallel rows within the border wire. The coils in the rows of coils lap and are connected by helices of wire. The helices of wire connect the adjacent rows of coils, and the coils adjacent the border wire are connected thereto by a helix of wire.

Abstract: A spring assembly comprising a base frame, a grid frame, coils connected at their lower ends and upper ends to the respective frames wherein the grid frame is provided with crossing longitudinal and transverse wires so positioned as to enable spacing the coils transversely of the grid frame at a uniform spacing and wherein the longitudinal wires of the grid frame are provided with deviations for receiving diametral portions of the coils and retaining the latter from movement relative to the grid frame.

Abstract: A spring assembly of the kind comprising a rigid base frame, a wire grid frame, a plurality of helically-coiled springs attached at one end to the base frame and at their other ends to the wire of the grid frame, said wires and ends of the coils being so structured as to enable detachably attaching the ends of the coils to the wires of the grid frame in overlapping locking engagement with the wires of the grid frame without the aid of wire clips or the like.

Abstract: The combination with a spring assembly of pairs of structures designed to be applied transversely to the top and bottom supporting surfaces at one or more longitudinally spaced intervals to enhance the resistance to sinking of the supporting surfaces, bowing at the longitudinal sides and collapse between the surfaces at the longitudinal sides comprising pairs of elongate parts which extend transversely across the assembly at the top and bottom sides from one longitudinal side to the other, said parts being transversely inextensible and resistant to flexing and at one end thereof a polygonal structure disposed between the border wires in the plane of the sides, two sides of which, the top and bottom, are parallel to the border wires and the other two sides of which embody oppositely disposed spring arms.

Abstract: A reinforcing structure for the corners of innerspring assemblies comprising spaced parallel parts disposed diagonally across the top and bottom sides of the innerspring assembly, spring members at the opposite ends of the spaced parallel parts disposed between the top and bottom sides which yieldably resist displacement of the top and bottom sides relative to each other and clips fixing the structures to the top and bottom sides of the assembly. The spring members are torsion springs comprising a coil and angularly disposed arms and these are disposed with the arms situated in the planes of the sides and ends of the assembly. Optionally, the top and bottom parts are longitudinallly adjusted to vary the distance between the spring members.

Abstract: The combination with a spring assembly of pairs of structures designed to be applied transversely to the top and bottom supporting surfaces at one or more longitudinally spaced intervals to enhance resistance to sinking of the supporting surfaces, bowing at the longitudinal sides and collapse between the surfaces at the longitudinal sides due to pressure applied perpendicular to the supporting surfaces, said structures each comprising a stiff, inextensible wire of circular or flat cross section resistant to flexing and at one end a compression-resistant spring, said structures being disposed in pairs with the one structure crossing the top and the other crossing the bottom and with the compression-resistant spring of one situated between the supporting surfaces at one side and of the other situated between the supporting surfaces at the other side and fasteners connecting the structure to the assembly.

Abstract: A spring interior forming method and apparatus provides a spring interior assembler and a coil row transfer station upstream of the assembler having at least one conveyer extending therethrough. A coil former is provided at an upstream end of the conveyor and is operated through a plurality of cycles, each to feed one spring coil onto the conveyor. In one embodiment, a single former is provided with a single conveyor extending therefrom through the transfer station. In a second embodiment, two such coiler-conveyor combinations is provided. In a third embodiment, one conveyor through the transfer station is provided with two coilers, each having a feeder preferably in the form of a conveyor, that selectively feed spring coils, which may be of different types, to a cross-over station for feed onto the transfer station conveyor. In a fourth embodiment, each coiler accumulates springs at its output while awaiting queing by the cross-over station.