Patent ID: 6216290
Filing Date: 2001-04-17
Classification: A47G

Abstract:
A method of forming a draft tube for an expandable sleeping bag comprising the following steps:a) forming an outer shell having first and second longitudinal shell edges defining a shell opening;b) forming an inner lining disposed within the shell, said inner lining having first and second longitudinal lining edges defining a lining opening;c) forming a draft tube having first and second longitudinal draft tube edges defining a draft tube opening;d) forming an elongated draft tube expansion segment having first and second longitudinal expansion segment opposite edges;e) forming an elongated front piece having first and second longitudinal front piece opposite edges;f) providing an access means having first and second access attachment strips;g) providing an expansion means having first and second expansion attachment strips;h) forming a first seam by overlapping and attaching the first longitudinal shell and lining edges, and first access attachment strip;i) forming a second seam by overlapping an attaching the first longitudinal draft tube edge, second access attachment strip, and first longitudinal front piece edge;j) forming a third seam by overlapping and attaching the first longitudinal expansion segment edge, first expansion attachment strip, and second longitudinal front piece edge;k) forming a fourth seam by overlapping and attaching the second longitudinal shell and lining edges, second longitudinal expansion segment edge, and second expansion attachment strip; andl) forming a fifth seam by overlapping and attaching the second longitudinal draft tube edge to the inner lining.