Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-11-03
1992-05-05
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156173, 156175, 156191, 156193, 156251, 2 695, 5413, D60C 2500
Patent
active
051103834
ABSTRACT:
A method of manufacturing sleeping bags (10) and similar insulated articles is provided using continuous fiber materials. The articles constructed are in the nature of enclosing shells (23) containing a fibrous insulation material (28). The primary articles are sleeping bags (10). The process involves creation of a three dimensional last element (32) in the general volumetric shape of the article and then wrapping the continuous fiber material (28) about the last (32) in such a manner as to form a cocoon (29). The method is enhanced by utilizing a last support apparatus (34) to rotate the last (32) during the wrapping step. The continuous fiber material (28) is ordinarily in the form of a swath (54) which is either preformed or is created from a ropelike tow (282) by a fiber separator (284). When the cocoon (29) is complete it is removed from the last (32) and inserted into a preformed enclosing shell (23) including an outer shell (24), an inner shell ( 26) and a closure such as a zipper (20). The preferred method of removal involves heating and edge stabilizing along the fiber edges (62) to form a heat bead (64) which aids in attaching the cocoon (29) to the shell (23). The sleeping bags (10) and other articles produced by the method are characterized by having excellent loft to weight ratios, an absence of unnecessary stitching, an absence of resins or artificial binders for the insulation and a soft and springy feel. Manufacturing advantages include improved economy, minimization of hazardous materials and particles, ease of sewing and flexibility to allow nonuniform arrangements of insulation.
REFERENCES:
patent: 4910055 (1990-03-01), Wigutow
patent: 4921557 (1990-05-01), Nakamura
Ball Michael W.
Hughes Michael J.
Krawczyk Nancy T.
Sierra Design, Inc.
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