Air bag and manufacturing method therefor

US5671935A · kind A · utility

Assignee

• Johann Berger · DE

Inventors

• Johann Berger · Alfdorf, DE
• Artur Foehl · Schorndorf, DE

Key dates

• Filing date: Oct 5, 1995
• Grant date: Sep 30, 1997
• Expiry date: Oct 5, 2015

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06H5/00
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An air bag is described which can be made of a single blank (50) of textile material or plastic sheet. The blank can be composed of several parts, but is preferably in one piece. Parts of the blank can be folded along fold pleats (52a,-i) in mutually parallel planes closely adjacent to each other. The folding pleats pass completely across the blank. Two sections (54) of the blank have mirror-image shapes along one folding pleat. After folding in superimposed planes, the edges which are to be joined lie over one another, and can therefore be easily sewn up. If the inner folding pleats (52i) and outer folding pleats (52a) alternate in the blank, the blank can be folded into a shape in the manner of a closed umbrella, the inner fold pleats (52i) corresponding to the ribs of the umbrella, and the sections (54) connected by the outer fold pleats (52a) projecting outwards. Two sections (54) adjoining an outer folding pleat (52a) are placed on one another, and their free edges (56) are joined to one another, in particular by sewing. By using a special sewing device, all of the edges to be sewn can be sewn simultaneously.