Patent ID: 8746662
Filing Date: 2014-06-10
Classification: A47C,Y10T

Abstract:
1. A method for manufacturing a foam spring with a tubular, resilient body for use in pillows, cushions or mattresses, which method comprises cutting a rectangular strip from a foam section having multiple discrete bands of foam interconnected to one another along a longitudinal direction, the multiple foam bands being made of foam materials of differing material compositions which impart different physical characteristics to the respective multiple bands, the rectangular strip being cut through the different bands along a direction transverse to their longitudinal direction; the length and the height of the strip corresponding respectively to the required circumference and height of the tubular body; bending the two opposite ends of the strip lying along the longitudinal direction of the bands towards each other and fixing these two opposite ends of the strip into a tubular shape in order to form the tubular resilient body such that the multiple foam bands form foam layers of differing material compositions with different physical spring characteristics which are axially superposed with respect to one another to contribute differing spring characteristics to the foam spring, wherein the differing foam material compositions are selected in relation to one another to achieve in combination a predetermined overall spring performance in the foam spring.