PERFORATING

**Definition:** This place covers:

Perforating, punching, cutting-out, stamping-out;

severing, by means other than cutting, non-metallic sheet material or metal foil in general;

severing, by means other than cutting, other forms of non-metallic materials not otherwise provided for.

**Limiting references (this place does not cover):** - Marking-out, perforating or making buttonholes -> A41H25/00 - Punching metal -> B21D - Drilling metal -> B23B - Cutting of metal by applying heat locally, e.g. flame cutting -> B23K - Guns for cutting by abrasive fluid jets -> B24C5/02 - Details common to machines for severing -> B26D - Drilling wood -> B27C - Drilling stone -> B28D - Cutting of glass -> C03B - Cutting of leather -> C14B - Severing of textile materials -> D06H - Cutting for light guides -> G02B6/25 - Cutting of tickets -> G07B

**Glossary:** - flow drilling: Friction drilling, also commonly known by the trademarked name Flowdrilling, is a non-machining method of making holes in metal, in which the material is melted by adding high pressure and friction energy. - frame: frame is a structure surrounding a second structure - passpartout: Passe-Partout (or passepartout) is the French term for a mat, a paper or, more usually, cardboard sheet with a cutout, which is placed under the glass in a picture frame . A picture (a photo or print, drawing, etc.) is placed beneath it, with the cutout framing it. The passe-partout serves two purposes: first, to prevent the image from touching the glass, and second, to frame the image and enhance its visual appeal. The cutout in the passe-partout is usually beveled to avoid casting shadows on the picture. - squeezing: means to compress the material in a locally limited area (e.g. by a rounded edge) to such an extend, that the material is displaced and hence tensional stress is produced to such an extend that the material is severed.