Erasing knife
OwnerBengt A. Bensoninventor
Life of this patent
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Abstract
According to the disclosure there is provided a continuously sharp erasing knife by a thin, hardened steel strip honed along at least one edge being given a special form with the aid of a dispenser, allowing the honed edge to be applied to a substructure for erasure in an effective cutting or scraping attitude. The strip is provided with weak zones and can be successively advanced from the dispenser so that end pieces which have become blunt can be broken off. At the same time, the dispenser forms a storage container for these broken-off pieces.
Claims10
An erasing knife having a substantially straight knife edge (18, 20) intended for erasing by scraping or cutting, accommodated in a holder means (a so-called dispenser) suitable for its manipulation, characterized by a thin metal strip (10, FIG. 1), preferably of hardened carbon steel, which is ground sharp along at least one edge (12) and at least in part formed to a uniformly bent tongue (16) terminating in a substantially flat end piece (18) with its sharp edge (20) forming an active erasing edge of the erasing knife, the end piece (18) of the knife being kept slightly twisted by the dispenser (50) in relation to the tongue portion of the strip, so that said flat end piece forms a predetermined, acute angel (.alpha.) with a normal to a plane coinciding with the sharp edge (12) of said tongue portion (16).
Dependencies are inferred from the claim text.