Device for punching plastic materials

• US 20030159560A1
• Filed: 04/18/2003
• Published: 08/28/2003
• Est. Priority Date: 05/15/2000
• Status: Abandoned Application

• Current Assignee: Giesecke & Devrient GmbH
• Original Assignee: Giesecke & Devrient GmbH
• Inventors: Drescher, Georg
• Application Number:
  US10/275,267
• Publication Number:
  US 20030159560A1
• Time in Patent Office: Days
• US Class Current: 83/684
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07739 comprising a first part capable of functioning as a record carrier on its own and a second part being only functional as a form factor changing part, e.g. SIM cards type ID 0001, removably attached to a regular smart card form factor
• CPC Class Codes: Y10T 83/8822 Edge-to-edge of sheet or web [e.g., traveling cutter]
• CPC Class Codes: Y10T 83/9423 Punching tool

Abstract

The invention relates to an apparatus for punching plastics, in particular for producing plug-in punchings for smart cards, whereby the stamping punch cooperates with a die-plate and the plastic to be punched is disposed between the stamping punch and the die-plate. In order to avoid disadvantages with respect to the quality of the punched edges, the cutting edge of the stamping punch is formed according to the invention so as to have a punching angle smaller than 90°.

Claims

1. An apparatus for punching plastics, in particular for producing plug-in punchings for smart cards (1), whereby the stamping punch (10) cooperates with a die-plate or support and the plastic (1) to be punched is disposed between the stamping punch (10) and the support or die-plate, characterized in that the cutting edge of the stamping punch (10) has a punching angle smaller than 90°

.

2. An apparatus according to claim 1, characterized in that the punching angle is 45°

in case of a V-shaped form of the cross section of the punching tool (10).

3. An apparatus according to claim 1, characterized in that the cross section of the stamping punch is of semicircular form in the area of the cutting edge.

4. An apparatus according to claim 1, characterized in that the cross section of the stamping punch (10) has a hemiellipsoidal form in the area of the cutting edge.

5. An apparatus according to any of claims 1 to 4, characterized in that the cutting points (6, 7) of the stamping punch (10) are of wavy form.