Patent ID: 8201482

Claim:
A device for punching blanks from flat sheet comprising: a carrier plate having a bottom surface; a tool having longitudinal sides, the tool being mounted in the carrier plate and having a cutting edge which projects beyond the bottom surface of the carrier plate, the tool extending in a direction from the carrier plate to the cutting edge; a pair of channel profiles, each fixed to the carrier plate on one longitudinal side of the tool; a strip of flexible material mounted in each channel profile, wherein each strip projects away from the bottom surface of the carrier plate beyond the cutting edge of the tool when the tool is in a non-working position; wherein each channel profile has a base fixed to the carrier plate and two legs extending away from the base in the direction of the tool, wherein each leg is provided with an inner undercut space, wherein the inner undercut space of the legs are curved inwards in cross section; wherein each strip of flexible material has two side surfaces, wherein at least one side surface of the strip has an outwardly directed base bead and a ridge, wherein the tool is flanked on both sides by the base bead on the strips, and wherein the ridge engages with the inner undercut space.