Method of making bonded non-woven polyester fiber structures using fiberballs
AssigneeE. I. Du Pont de Nemours and Company
InventorIlan Marcus
Life of this patent
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Abstract
In a batch process for repetitive molding of fiberballs into cushions that are required in the same specific shape in large numbers, the molds are filled continuously by means such as a chute.
Claims4
A batch process for molding cushions from a feed consisting of fiberballs of blends of load-bearing fibers and binder fibers, said fiberballs, if desired, being blended with free fibers, including a step of continuously filling a succession of molds by laying down said feed, via a chute, into the bottom of the molds, and cutting the feed so-laid into the molds to separate to feed between individual molds, followed by closing the molds, heating the molds in an oven to heat-activate the binder fibers, and cooling the molds in a cooling zone.
A process according to any one of claims 1,2 or 4, wherein, after the feed has been laid into the molds, it is then shaped by pressure from a upper part of the mold.
Dependencies are inferred from the claim text.