Two wire spring making machine and method

Abstract

A method and machine for selectively manufacturing wire springs from two different wires by feeding the wires through a pair of continuously rotatable opposed feed rollers, which rollers are operative to feed only one of the wires at a time into engagement with a coil forming mechanism having a pair of coil forming tools. The tools are selectively positionable for engagement with one or the other of the two wires depending upon which of the two wires is being fed into the coil forming mechanism.

Description

technical field

[0001] This application is a continuation-in-part of US Patent Application Serial No. 09 / 582,909, filed September 18, 2000, and entitled "Spring Winding Automatic Machine." This invention relates to the manufacture of springs, and more particularly, to the manufacture of coil springs for mattresses and furniture. Background technique

[0002] In the mattress and furniture industry, it is common practice to manufacture mattress springs on so-called coiling machines, from which the mattress springs are sent directly to assembly machines where they are assembled into rows and columns , which are then combined to produce a mattress spring core. Such machines are described, for example, in US Patent Nos. 4,492,298 and 4,111,241.

[0003] In recent years, mattresses have been designed using multiple springs of varying hardness throughout the spring core. In some cases, springs of one firmness are used on one side of the mattress and springs of a different firmne...

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