Bielomatik Leuze Gmbh + Co.

Ernst Pecha

Rudolf Trost

Rudi Gneiting

Karl-Eberhard Dieterich

The rotary cutting tool is used for making holes in walls of thermoplastic materials, e.g. fuel tanks produced by the blowing process. Cutting blades pointing roughly in the axial direction are placed on the free end face of a circular, rotary tool member and said cutting blade score and displace, instead of cutting the material. The cutting blades are arranged at a drawing angle to the axial direction and slope to the inside or outside, depending on whether a burr is or is not required on the opening edge. A holding device in the form of a mandrel or pin ensures that the cut out circular disk does not drop into the container. Thus, a cut is made, which is suitable for further processing by welding on connections or fitting seals and produces no chips and waste which could fall into the container.

Cutting tool for making holes

A welding apparatus for welding covers to containers, such as battery casings by pressing the cover on to the casing is provided with a testing device which includes a connector adjacent the pressing-on device and adapted to connect with an opening in the cover. The testing device is adapted to monitor the pressure inside the container after the latter has been charged with fluid under pressure at the end of the welding operation. Any fall in pressure is indicative of a leak at the welded seam.

Welding containers

A method and apparatus are disclosed for welding a plurality of flexible, elongated members, such as thermoplastic members, at their respective end points to form a frame. One-half of the members are arranged in receptacles in a holder with all the members being in a generally U-shaped configuration and in side-by-side relationship to one another. The remaining members are arranged in receptacles in a second holder which lies adjacent the first holder, with all members in this holder also being in a generally U-shaped configuration with one member partially surrounding all the other members which are situated in side-by-side relationship to one another within the U-shaped mouth of the member surrounding them. Each end portion of the members in one holder lies in the same horizontal plane as the end portion of the member in the other holder to which it is to be welded, and all members protrude outwardly from their respective holder and are pointed at the members to which they are to be welded at an angle corresponding to the internal angle at the corners of the frame which is to be formed. After at least one of the holders is moved to bring the end portions of one set of members in close proximity to the corresponding end portions in the other holder, the respective end portions are welded to one another by suitable welding apparatus, such as a welding mirror, to form a unitary frame.

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Munich, Georgia

Ernst Pecha