The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1995
Filed:
Sep. 13, 1994
Bernhard Bisping, Ratingen, DE;
Rheinmetall GmbH, Rattingen, DE;
Abstract
A method of closing the forward portion or region (u) of a cylindrical sleeve body (3) of a practice cartridge (1), wherein a predetermined number of inside and outside radial folds (8, 7, respectively) are created in the forward region (4) of the sleeve body (3) in two work cycles, and wherein circular arc-shaped inside folds (8) of predetermined depth are created during the first work cycle by the application of radial pressure using correspondingly shaped profiling tools. To achieve secure closing of the sleeve body (3) through folding in a simple and cost-effective manner and without predetermined fracture points resulting in the region of the inside folds (8) during closing, the inside folds (8) are created in the forward region of the projectile body (3) during the first work cycle so that a first, central opening having a diameter of at least 2 mm remains between the inside folds (8) after completion of this work cycle. Due to this first step, tools that have a relatively large bending radius can be used for creating the inside folds, despite the high number of folds. In the subsequent second work cycle, a further radial pressing together of the inside folds (8) is effected by exerting pressure on the outside folds (7), e.g. by using a conical die.