the penetrating transfer needle 1 u2032 is moved in the direction of the obliquely upward directed arrow 41 accordingly in the course of the penetrating step the penetrating transfer needle 1 u2032 or 1 a u2032 moves away from the free end 23 of the respective transfer spring 15 or 15 a as the penetrating step progresses the transfer spring 15 of the transfer needle 1 according to the invention fig6 b is in engagement with the shank 2 as before while the conventional transfer needle 1 a as shown in fig6 a is lifted off the shank 2 as before only as the penetrating step further progresses as shown in fig7 a and 7 b does the penetrating transfer needle 1 u2032 advance into the penetrating chamber 27 to such an extent that it leaves the guide face 29 with its head and reaches the side face 12 of the transfer needle 1 at the same time the penetrating transfer needle 1 u2032 has advanced to such an extent in the direction of the arrow 42 fig2 that it reaches a region of sufficient distance between the transfer spring 15 and the side face 12 to be able to move forward without causing an appreciable excursion of the transfer spring 15 the penetrating step performed by the transfer needle 1 u2032 is optimized to such an extent by virtue of the shape of the guide face 29 altered by the invention.