Abstract: Proposed is a method for producing a portable data carrier (100) starting out from a film carrier (10) having disposed on its upper side (14) a contact layout (28), and on its underside (16) a semiconductor circuit (20) connected to the contact layout. The thus prepared film carrier (10) is put into an injection mold (30) where an injection molding process is performed in which a molded body (40) having an outer contour (102) corresponding to a standard specification for the outer dimensions of a portable data carrier is formed on the underside (16) around the semiconductor circuit (20).

Abstract: Proposed is a method for producing a portable data carrier (100) starting out from a film carrier (10) having disposed on its upper side (14) a contact layout (28), and on its underside (16) a semiconductor circuit (20) connected to the contact layout. The thus prepared film carrier (10) is put into an injection mold (30) where an injection molding process is performed in which a molded body (40) having an outer contour (102) corresponding to a standard specification for the outer dimensions of a portable data carrier is formed on the underside (16) around the semiconductor circuit (20).

Abstract: The invention relates to a method and apparatus for producing card-shaped data carriers. The method has at least one production step requiring a data carrier of a defined type or quality or in a defined position and/or changing the data carrier in irreversible fashion or in a fashion which can be reversed only by additional expense. The data carrier is optically tested before or after said production step, and the further processing of the data carrier controlled depending on the result of said test.

Abstract: In a hammer drill a pair of pistons are spaced axially apart within a bore forming an air cushion between them. As the rear piston is reciprocated the other piston is also reciprocated and strikes against a drilling tool. The rear piston consists of a hollow cylinder with a headpiece forming an airtight closure across its end surface facing toward the other piston. The headpiece of the rear piston has a part which separates from the remainder of the headpiece when it is struck by the other piston affording communication between the air cushion and the interior of the hollow cylinder.