the device for the production of master partouts, with a cutting head (8) movable in two directions transverse and longitudinal above the piece of key crude oil (6).is provided with a control mechanism; the control mechanism is adapted so that the cutting head (8) can move automatically above the piece of passkey unbleachedor; also is adjustable to move the cutting head (8) in the second thickness (d, d ') of the piece in the roughin a position which allows the exact cut for this; the edges (3) are departing from edges of the cardboard of the internal opening window are posted without the need to increase more than youwhile the width of the cut. this device allows a cutting of the edges very precise and easily obtainable without a special experience.
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