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US 4,829,854 AGranted
Cutting and scoring strip
AssigneeEssmann & Schaefer GmbH & Co. KG
InventorHorst-Peter Kammerling-Essmann
Life of this patent
Estimating the term…
Abstract
A cutting and scoring line consisting of a blade (1) of steel with a cut bevel (2) formed on one longitudinal side of the blade, and the blade (1) is hardened in the area of the bevel (2) and the bevel has a fine grind (5) in the hardened area (4) starting from the tip (3) of the bevel.
Claims6
Cutting and scoring strip for cutting and scoring paper and cardboard or the like, comprising a blade of flat spring-steel cross bands and having a sharpened bevel on one longitudinal side of said blade,
- made by the process comprising the steps of forming said sharpened bevel with an overmeasure of 2/100 to 4/100 mm by a shaving process in which said blade is drawn in operative relation to a hard metal draw die,
- hardening said so-formed bevel in an area with a depth of penetration of 3/10 to 5/10 mm measured from the edge of said bevel, and
- finely grinding said bevel in the same area starting from the edge so that the overmeasure of 2/100 to 4/100 mm existing after said shaving process is removed.
Dependencies are inferred from the claim text.