Method of manufacturing products made of foam filled flexible envelops and product made of a foam filled flexible envelop

摘要

To make foam filled encased objects, cut sections of the casing are seamed together by sewing and the interior is foamed with the edges turned out, then the threads are drawn, turning and tightening the seam, closing the opening and locking the seam and its threads with permanently-adhering foaming mixture. Cut sections (1, 2) of the casing (3) are seamed together by sewing, leaving a wide opening (7) with edges (5, 6), zig-zagging loose threads (8) and loose ends (9, 10). The interior is foamed with the edges turned out, then the threads are drawn, turning and tightening the seam, closing the opening and locking seam and its threads with permanently-adhering foaming mixture. On completion of reaction, thread ends are cut off. An Independent claim is included for the product which comprises seamed (4) casing blanks (1, 2) with soft foam filling, constructed as described. Preferred features: The thread is a monofilament. Ends are secured after closing but before removal. One short thread end is secured to the casing before foaming. The thread is led around one end of the opening and two projecting thread ends are drawn. Threads run in opposite directions, one end secured to the opening, the other is left long, assisting grip. In a lock-stitched seam, two pairs of long ends are left.