US 6,655,251 B2Granted

Method and device for cutting film-like materials, for instance for automatic packaging installations

AssigneeCavanna S.p.A.

InventorDario Guidetti

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Abstract

A device for cutting film-like material in a shearing action by a blade and a counterblade provided with respective cutting edges. The blade has first and second ends. Movement of the blade is controlled such that the first end and the second end move along paths that are different from, but substantially parallel, to one another. The blade moves between a separated position and a closed position. In the separated position, the cutting edges define a space through which the film-like material may advance, and the distance between the respective cutting edges is not constant along the entire blade, with the second end of the blade being closer to the counterblade than is the first end of the blade. In the closed position, the blade and the counterblade are closed on one another after cutting the film-like material with a gradual cooperative movement of the cutting edges.

Claims14

Dependent claims

A device for cutting film-like material as a result of a shearing action performed by a blade and a counterblade provided with respective cutting edges acting in a cutting plane, said blade having a first blade end and a second blade end, said device comprising

an actuating assembly for actuating said blade and adapted to control movement of said blade such that said first blade end moves along a first path and said second blade end moves along a second path, wherein said first path and said second path are substantially parallel to one another, and wherein said blade is thereby moved between
a separated position, in which said respective cutting edges define a space through which said film-like material is adapted to advance, and in which said cutting edge of said blade is located at a first distance from said cutting edge of said counterblade at said first blade end, and in which said blade is located at a second distance from said cutting edge of said counterblade at said second blade end, wherein said first distance is greater than said second distance;
and
a closed position, in which said blade and said counterblade are closed on one another after cutting of said film-like material with a cooperative movement of said cutting edges, wherein said cooperative movement is performed in a gradual way starting from said second blade end toward said first blade end;
and
a pressure element for applying on said blade a pre-loading toward said counterblade, wherein said pressure element comprises an adjustment member for selectively adjusting said pre-loading.

3 more elements

an actuating assembly for actuating said blade and adapted to control movement of said blade such that said first blade end moves along a first path and said second blade end moves along a second path, wherein said first path and said second path are substantially parallel to one another, and wherein said blade is thereby moved between
a separated position, in which said respective cutting edges define a space through which said film-like material is adapted to advance, and in which said cutting edge of said blade is located at a first distance from said cutting edge of said counterblade at said first blade end, and in which said blade is located at a second distance from said cutting edge of said counterblade at said second blade end, wherein said first distance is greater than said second distance;
and
a closed position, in which said blade and said counterblade are closed on one another after cutting of said film-like material with a cooperative movement of said cutting edges, wherein said cooperative movement is performed in a gradual way starting from said second blade end toward said first blade end;
wherein said actuating assembly further comprises at least one actuating member supporting one of said first blade end and said second blade end, and wherein said at least one actuating member is adapted to travel in a direction generally transverse to said cutting edge of said blade;
and
at least one articulation device, wherein said at least one articulation device articulately connects said at least one actuating member to said supported one of said first blade end and said second blade end.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/997,862Filed 29 Nov 2001
Priority: EP 018300819 Feb 2001
Published: US 2002/0108476 A115 Aug 2002
Granted: 2 Dec 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B26D 7/2628
Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member: means for adjusting the position of the…
B26D 1/085
Of the guillotine type: for thin material, e.g. for sheets, strips or the like
B26D 1/265
Moving about an axis substantially perpendicular to the line of cut: for thin material, e.g. for sheets, strips or the like
B26D 5/16
Means for actuating the cutting member to effect the cut: cam means