Abstract

Apparatus (1) for applying adhesive to a string (2) of pocketed coil springs (3) during manufacture of an innerspring assembly, which apparatus (1) comprises a plurality of independently actuatable adhesive applicators (5), each having a different transverse position relative to a longitudinal axis of the string (2) of pocketed coil springs (3), and means for causing relative movement between the string (2) of pocketed coil springs (3) and the plurality of adhesive applicators (5), along a longitudinal axis of the string (2), wherein the apparatus (1) is adapted to apply adhesive to the string (2) of pocketed coil springs (3), during relative movement between the first string (2) of pocketed coil springs (3) and the plurality of adhesive applicators (5), in a pattern that varies between at least some pockets of the string (2) of pocketed coil springs (3).

IPC Classes  ?

• B68G 9/00 - Placing upholstery springs in pocketsFitting springs in upholstery

Abstract

An apparatus is disclosed for the manufacture of a coil spring from a wire. The apparatus comprises first and second tools for contacting the wire prior to, and/or during, deformation of the wire into a coil spring. The apparatus includes means for applying an electrical potential difference between the first and second tools such that an electric current is caused to flow through at least part of the wire during use.

IPC Classes  ?

• B21F 33/04 - Connecting ends of helical springs for mattresses
• B21K 21/00 - Making hollow articles not covered by any single one of groups
• C21D 9/54 - Furnaces for treating strips or wire
• B21F 3/02 - Coiling wire into particular forms helically
• C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs
• C21D 9/06 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rails with diminished tendency to become wavy
• B68G 9/00 - Placing upholstery springs in pocketsFitting springs in upholstery
• B21F 99/00 - Subject matter not provided for in other groups of this subclass
• C21D 1/40 - Direct resistance heating
• C21D 9/62 - Continuous furnaces for strip or wire with direct resistance heating

Abstract

Apparatus (20,30) is disclosed for the manufacture of a coil spring (40) from a wire (12). The apparatus (20, 30) comprises first and second tools (24, 28), for contacting the wire (12) prior to, and/or during, deformation of the wire (12) into a coil spring (40), wherein the apparatus (20, 30) includes means for applying an electrical potential difference between the first and second tools (24, 28), such that an electric current is caused to flow through at least part of the wire (12), during use.

IPC Classes  ?

• B21F 3/02 - Coiling wire into particular forms helically
• B21F 33/04 - Connecting ends of helical springs for mattresses
• B68G 9/00 - Placing upholstery springs in pocketsFitting springs in upholstery
• C21D 8/06 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
• C21D 9/02 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for springs