# US 5,704,640 A · Bondable autoignition foil

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- Number: US 5,704,640 A
- Document ID: US5704640A
- Status: Granted
- Kind: A
- Application number: 08/641,586
- Filed: 1996-05-01
- Granted: 1998-01-06
- Earliest claimed: 1996-05-01
- Assignees: Morton International, Inc.
- Inventors: David B. Monk; Alan D. Kendrick; Mark B. Woodbury
- Web page: https://patentgrep.com/patent/US5704640A

## CPC

- B60R 21/2644: {using only solid reacting substances, e.g. pellets, powder}
- C06B 45/12: having contiguous layers or zones
- C06C 9/00: Chemical contact igniters; Chemical lighters
- F42B 3/04: for producing gas under pressure {(generators of inflation fluid especially adapted for vehicle air bags B60R21/26)}
- F42C 19/0803: {characterised by the combination of per se known chemical composition in the priming substance}
- F42C 19/0826: {comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators}
- B60R 2021/26064: {characterised by auto-ignition means}
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- C06B: EXPLOSIVES OR THERMIC COMPOSITIONS (blasting F42D); MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES (compounds in general C01, C07 or C08; {demolition agents based on cementitious or like materials C04B41/0009})
- C06C: DETONATING OR PRIMING DEVICES; FUSES (ammunition fuzes F42C); CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)
- F42C: AMMUNITION FUZES (blasting cartridge initiators F42B3/10; chemical aspects C06C); ARMING OR SAFETY MEANS THEREFOR (filling fuzes F42B33/02; fitting or extracting primers in or from fuzes F42B33/04; containers for fuzes F42B39/30)

## Abstract

An autoignition charge for pyrotechnic automotive airbag in inflation devices is provided in the form of a foil of a synthetic polymer or of a metal, having an adhesive on one surface of the foil and an autoignition material on the opposite surface of the foil. Pieces of foil are readily attached to inflator housings at any suitable location and are secured to the housing by the adhesive on one surface of the foil.

## Claims

### Claim 1

In an automotive airbag inflation device, a bondable autoignition foil comprising a carrier film, a thin layer of an adhesive adhered to a first face of said film and a thin coating of an autoignition composition on a second face, opposite said first face of said film.

### Claim 2 (depends on 1)

The invention of claim 1 in which the bondable foil is adhered to a wall in said airbag inflation device.

### Claim 3 (depends on 2)

The invention of claim 2 in which said foil is adhered to an inner face of an outer wall of a housing for said airbag inflation device.

### Claim 4 (depends on 1)

The invention of claim 1 wherein said airbag inflation device includes a casing in which there are apertures and said foil is adhered to said casing and is disposed so as to cover said apertures.