Device for cutting a sheet material
AssigneeGerhardt International A/S
InventorsJoergen Gerhardt, Ib Groenbjerg
Life of this patent
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Abstract
A device for cutting through, cutting into, perforating through or perforating into sheet material, such as papers, metal foils or plastic films, more particularly a label material disposed on a backing material which is not to be impaired, by means of a cutting disk which is to be detachably and coaxially clamped between a dolly disk and a pressure disk and the outside diameter of which is somewhat greater than the outside diameter of the dolly disk and of the pressure disk. The cutting disk is of such small thickness that the cutting work or perforating work can be carried out with its peripheral surface.
Claims19
A device for cutting sheet material, comprising:
- (A) a dolly disk;
- (B) a pressure disk;
- and
- (C) a cutting disk which is detachably and coaxially clamped between said dolly disk and said pressure disk, said cutting disk having a diameter which is greater than the larger of the diameters of said dolly disk and said pressure disk,
- wherein said cutting disk has two lateral surfaces that are substantially parallel to a center plane of said cutting disk and a peripheral surface with a cross section substantially symmetric to said center plane;
- wherein said peripheral surface has a rounded summit area and two straight flanks which are oblique to said center plane, said flanks connecting said rounded summit area with said two lateral surfaces;
- and
- wherein said cutting disk has a thickness which is sufficiently small to allow said peripheral surface thereof to perform a cutting operation.
The device as claimed in claim 3, wherein said diameter of said cutting disk is between 0.55 and 0.65 mm greater than the larger of the diameters of said dolly disk and said pressure disk.
A method of cutting sheet material, comprising:
- (A) providing a cutting disk which is detachably and coaxially clamped between a dolly disk and a pressure disk, said cutting disk having a diameter which is greater than the larger of the diameters of said dolly disk and said pressure disk;
- wherein said cutting disk has two lateral surfaces that are substantially parallel to a center plane of said cutting disk and a peripheral surface with a cross section substantially symmetric to said center plane;
- wherein said peripheral surface has a rounded summit area and two straight flanks which are oblique to said center plane, said flanks connecting said rounded summit area with said two lateral surfaces;
- and
- (B) cutting said sheet material with a peripheral surface of said cutting disk.
Dependencies are inferred from the claim text.