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1. (WO1997017233) AIR BAG TEAR SEAM AND METHOD OF MANUFACTURE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017233 International Application No.: PCT/US1996/017947
Publication Date: 15.05.1997 International Filing Date: 08.11.1996
Chapter 2 Demand Filed: 06.06.1997
IPC:
B29C 59/00 (2006.01) ,B60R 21/2165 (2011.01) ,B29C 35/08 (2006.01) ,B29C 71/04 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
59
Surface shaping, e.g. embossing; Apparatus therefor
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
R
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
21
Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
02
Occupant safety arrangements or fittings
16
Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
20
Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
215
characterised by the covers for the inflatable member
2165
characterised by a tear line for defining a deployment opening
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
35
Heating, cooling or curing, e.g. crosslinking, vulcanising; Apparatus therefor
02
Heating or curing, e.g. crosslinking, vulcanising
08
by wave energy or particle radiation
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
71
After-treatment of articles without altering their shape; Apparatus therefor
04
by wave energy or particle radiation
Applicants:
TEXTRON AUTOMOTIVE COMPANY INC. [US/US]; 750 Stephenson Highway Troy, MI 48083, US (AllExceptUS)
GALLAGHER, Michael, J. [US/US]; US (UsOnly)
Inventors:
GALLAGHER, Michael, J.; US
Agent:
EVANS, John, C.; Reising, Ethington, Barnard & Perry P.O. Box 4390 Troy, MI 48099, US
Priority Data:
60/006,40409.11.1995US
Title (EN) AIR BAG TEAR SEAM AND METHOD OF MANUFACTURE
(FR) COUTURE ARRACHABLE DE RECOUVREMENT DE SAC DE SECURITE GONFLABLE ET SON PROCEDE DE REALISATION
Abstract:
(EN) An air bag cover (14) for use in a supplement inflatable restraint system includes an air bag cover skin made of a polymeric material. The cover skin includes a weakened tear seam region (16) for guiding the tearing of the air bag cover skin in response to air bag inflation. The tear seam region is weakened by photodegradation, i.e., selective exposure to ultraviolet light (20) which breaks polymer bonds within the polymeric material of the tear seam region. Photodegradation reduces the tensile strength and/or the percent elongation (measured at break) of the tear seam region (16) compared to the rest of the air bag cover skin (24).
(FR) Recouvrement (14) de sac de sécurité gonflable destiné à servir de dispositif gonflable de protection complémentaire, comprenant un film de recouvrement constitué d'un matériau polymère. Ce film de recouvrement présente une zone plus faible correspondant à une couture arrachable (16), conçue pour guider l'arrachement de ce film lors du gonflage du sac gonflable de sécurité. Cette zone correspondant à la couture arrachable est affaiblie par photodégradation, c'est-à-dire par une exposition sélective à une lumière ultraviolette (20) qui rompt les liaisons polymères du matériau polymère dans la zone occupée par la couture. La photodégradation réduit la résistance à la traction et/ou le coefficient d'allongement (mesurée à la rupture) de la zone correspondant à cette couture arrachable (16), par rapport au reste du film (24) de recouvrement du sac de sécurité gonflable.
Designated States: CA, JP, KR, MX, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0857123US6062590JP2000500091CA2235930KR1019990067426