An exemplary embodiment provides a method of manufacturing a string of pocketed spring coils comprising: simultaneously making at least two spring coils; simultaneously transporting the at least two spring coils to a compressor: simultaneously compressing the at least two spring coils; simultaneously inserting the at least two compressed spring coils between top and bottom plies of a piece of fabric; welding the top and bottom plies of the fabric along an edge of the folded fabric parallel to the longitudinal axis of the fabric and opposite the folded edge of the fabric; welding the top and bottom plies of the fabric along lines transverse to the longitudinal axis of the fabric between each of the compressed spring coils to create a plurality of pockets, each pocket encompassing a compressed spring coil; and expanding each of the compressed spring coils within each of the plurality of pockets.

An exemplary embodiment provides a method of manufacturing a string of pocketed spring coils comprising: simultaneously making at least two spring coils; simultaneously transporting the at least two spring coils to a compressor: simultaneously compressing the at least two spring coils; simultaneously inserting the at least two compressed spring coils between top and bottom plies of a piece of fabric; welding the top and bottom plies of the fabric along an edge of the folded fabric parallel to the longitudinal axis of the fabric and opposite the folded edge of the fabric; welding the top and bottom plies of the fabric along lines transverse to the longitudinal axis of the fabric between each of the compressed spring coils to create a plurality of pockets, each pocket encompassing a compressed spring coil; and expanding each of the compressed spring coils within each of the plurality of pockets.

Disclosed are a device and method for detecting heating treatment temperatures of double steel wires. The temperature detection device includes a double wires coiling machine, two heating mechanisms for respectively heating two steel wires, and two temperature detection mechanisms for respectively detecting temperatures of the two steel wires in real time, and a controller electrically connected to the two heating mechanisms and the double-wire spring coiling machine respectively.

A mechanism (300) for transferring coil springs from a coil winding device (110) to a conveyor belt (210) of a pocketed coil assembly machine comprises a magnetic lift platform (310) for engaging a coil spring (10) before being released at an output of the coil winding device (110). Further, the mechanism comprises a drive mechanism (315) for moving the lift platform (310) between the output of the coil winding device (110) and the conveyor belt (210).

A mechanism (300) for transferring coil springs from a coil winding device (110) to a conveyor belt (210) of a pocketed coil assembly machine comprises a magnetic lift platform (310) for engaging a coil spring (10) before being released at an output of the coil winding device (110). Further, the mechanism comprises a drive mechanism (315) for moving the lift platform (310) between the output of the coil winding device (110) and the conveyor belt (210).

A method to manufacture a steel wire spring core for a mattress or for seating is described, which comprises the steps of providing a carrier comprising steel wire; repeatedly cold coiling a steel wire spring from steel wire taken from the carrier; and connecting a series of the coiled steel wire springs to each other. The steel wire has a diameter d between 0.8 and 4.5 mm; and has a drawn pearlitic microstructure. The steel wire comprises a steel alloy having a carbon content between 0.35 wt % and 0.85 wt %. The steel wire on the carrier has a ratio—expressed as a percentage—of the yield strength R.sub.po 2 (in MPa) over the tensile strength R.sub.m (in MPa) higher than 85%.

A method to manufacture a steel wire spring core for a mattress or for seating is described, which comprises the steps of providing a carrier comprising steel wire; repeatedly cold coiling a steel wire spring from steel wire taken from the carrier; and connecting a series of the coiled steel wire springs to each other. The steel wire has a diameter d between 0.8 and 4.5 mm; and has a drawn pearlitic microstructure. The steel wire comprises a steel alloy having a carbon content between 0.35 wt % and 0.85 wt %. The steel wire on the carrier has a ratio—expressed as a percentage—of the yield strength R.sub.po 2 (in MPa) over the tensile strength R.sub.m (in MPa) higher than 85%.

A system for manufacturing a string of pocketed coil springs comprising: a coil-forming subsystem that produces two coil springs; a spring transporter subsystem that receives the two coil springs at a first position and conveys the two coil springs to a second position; a spring compressor subsystem that compresses the two coil springs; a fabric-folding subsystem that receives a piece of fabric and folds the fabric to create an open side; a spring inserter subsystem that receives the two compressed coil springs and inserts the two compressed coil springs between top and bottom surfaces of a folded piece of fabric; two welder subsystems that form first and second welds between top and bottom surfaces of the folded piece of fabric, the first welds and the second welds forming a plurality of pockets in the fabric, each of the plurality of pockets comprising a compressed coil spring.

A system for manufacturing a string of pocketed coil springs comprising: a coil-forming subsystem that produces two coil springs; a spring transporter subsystem that receives the two coil springs at a first position and conveys the two coil springs to a second position; a spring compressor subsystem that compresses the two coil springs; a fabric-folding subsystem that receives a piece of fabric and folds the fabric to create an open side; a spring inserter subsystem that receives the two compressed coil springs and inserts the two compressed coil springs between top and bottom surfaces of a folded piece of fabric; two welder subsystems that form first and second welds between top and bottom surfaces of the folded piece of fabric, the first welds and the second welds forming a plurality of pockets in the fabric, each of the plurality of pockets comprising a compressed coil spring.

A mechanism (300) for transferring coil springs from a coil winding device (110) to a conveyor belt (210) of a pocketed coil assembly machine comprises a magnetic lift platform (310) for engaging a coil spring (10′) before being released at an output of the coil winding device (110). Further, the mechanism comprises a drive mechanism (315) for moving the lift platform (310) between the output of the coil winding device (110) and the conveyor belt (210).