A method of manufacturing a metallic case of a pyrotechnical igniter having a wall with at least one weak zone and an inner surface in the case with at least one part facing this at least one weak zone includes positioning the case on a matrix having a plane zone. The method further includes striking the wall with at least one punch so as to, in a single movement of striking, deform at least the part of the inner surface facing this at least one weak zone and having at least one initially curved-in zone in order to bring it on the plane zone and to form in this manner a plane inner surface, and to form the at least one weak zone.

A base body for a metal-sealing material-feedthrough subject to high pressures in an igniter for an airbag or a belt tensioning device. The base body for the metal-sealing material feedthrough is an element formed by a process of cold forming and having a ring-shape or a plate-like shape. The element includes a feedthrough opening extending from a front side of the element towards a rear side of the element. There is a metallurgic section in the element of the base body with structure-lines or flow-lines that are bent due to a reshaping process of the process of cold-forming.

A base body for a metal-sealing material-feedthrough subject to high pressures in an igniter for an airbag or a belt tensioning device. The base body for the metal-sealing material feedthrough is an element formed by a process of cold forming and having a ring-shape or a plate-like shape. The element includes a feedthrough opening extending from a front side of the element towards a rear side of the element. There is a metallurgic section in the element of the base body with structure-lines or flow-lines that are bent due to a reshaping process of the process of cold-forming.

A metal fixing material leadthrough for an igniter of airbags and/or belt tensioners includes a main body having a through-opening formed therein and at least one metal pin fused into a glass or glass-ceramic fixing material in the through-opening and having a core region. The at least one metal pin, at least in its core region, consists of ferritic stainless steel made to the EN 10020 standard. The ferritic stainless steel is selected in such a way that, when converted to a standard dimensioning of a metal pin diameter of 1.000.03 mm and a metal pin length of 11.680.02 mm, the at least one metal pin has a maximum elastic deflection W.sub.max of less than 0.24 mm.

A ring-shaped or plate-like element, in particular for a metal-sealing material-feedthrough, for example for devices which are subjected to high pressures, such as igniters for airbags or belt tensioning devices, includes a feedthrough opening, whereby the feedthrough opening is located substantially in the center of the ring-shaped or plate-like element and whereby the ring-shaped or plate-like element has a thickness. The ring-shaped or plate-like element has a relief region in the area of the feedthrough opening. Further, the ring-shaped or plate-like element in the relief region has at least one thickness which is reduced by the height of the relief region and which is selected so that the feedthrough opening can be punched out of the ring-shaped or plate like element having the reducing thickness.

A ring-shaped or plate-like element, in particular for a metal-sealing material-feedthrough, for example for devices which are subjected to high pressures, such as igniters for airbags or belt tensioning devices, includes a feedthrough opening, whereby the feedthrough opening is located substantially in the center of the ring-shaped or plate-like element and whereby the ring-shaped or plate-like element has a thickness. The ring-shaped or plate-like element has a relief region in the area of the feedthrough opening. Further, the ring-shaped or plate-like element in the relief region has at least one thickness which is reduced by the height of the relief region and which is selected so that the feedthrough opening can be punched out of the ring-shaped or plate like element having the reducing thickness.

An initiator head includes a housing piece defining an interior chamber, a circuit board supported in the interior chamber, a line-in terminal coupled to the circuit board, and insulating material filling the interior chamber and covering a top surface of the circuit board for absorbing shocks or vibrations and electrically insulating electronics of the circuit board.

An initiator head includes a housing piece defining an interior chamber, a circuit board supported in the interior chamber, a line-in terminal coupled to the circuit board, and insulating material filling the interior chamber and covering a top surface of the circuit board for absorbing shocks or vibrations and electrically insulating electronics of the circuit board.

An initiator includes a pair of electrodes, an insulating member interposed between the pair of electrodes, a cover body covering one end side of the pair of electrodes together with a space around the pair of electrodes, and an explosive with which the space inside the cover body is filled. The pair of electrodes include, in the space, a discharge gap where a dielectric strength is lower than a dielectric strength of a portion where the insulating member is interposed. In this way, provided is a technology that enables ignition without a bridge wire and facilitates manufacture of an initiator.

An initiator includes a pair of electrodes, an insulating member interposed between the pair of electrodes, a cover body covering one end side of the pair of electrodes together with a space around the pair of electrodes, and an explosive with which the space inside the cover body is filled. The pair of electrodes include, in the space, a discharge gap where a dielectric strength is lower than a dielectric strength of a portion where the insulating member is interposed. In this way, provided is a technology that enables ignition without a bridge wire and facilitates manufacture of an initiator.