(57) The invention provides a modification to a known form of spring interior. The known
spring interior comprises bands of springs (15) disposed side by side and connected
by helical wires (16) extending transversely of the bands. Each band (15) is made
from a single length of wire shaped to form a row of coil springs (1). Each spring
in the rows joined to the next by an integral wire link (5, 12) comprising a bridging
portion (7, 13) which extends lengthwise of the row. Each of the top and bottom surfaces
of the spring interior thus presents an array of rectangular apertures. The invention
provides supporting structures (9, 17) integral with the bridging portions and projecting
into those apertures to resist any tendency for upholstery material to sink into the
apertures in use. The supporting structures may be of any shape such as loops (9)
or zig-zags (13).
|
|
