# US 4,396,380 A · Process for the preflanging of the mouths of cardboard of composite containers for their subsequent sealing

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- Number: US 4,396,380 A
- Document ID: US4396380A
- Status: Granted
- Kind: A
- Application number: 06/198,857
- Filed: 1980-10-20
- Granted: 1983-08-02
- Earliest claimed: 1979-11-20
- Assignees: Metalgrafica Malaguena, S.A.
- Inventors: Francisco G. Sanchez
- Web page: https://patentgrep.com/patent/US4396380A

## CPC

- B31F 1/008: {Shaping of tube ends, e.g. flanging, belling, closing, rim-rolling or corrugating; Fixing elements to tube ends}
- B26D 9/00: Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting apparatus
- B31C 11/02: for additionally shaping the articles
- B31F: MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making layered products not composed wholly of paper or cardboard B32B)
- B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04)
- B31C: MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER

## Abstract

A method of simultaneously flanging and cutting tubular bodies by scoring the tubular bodies on each side of the cut is disclosed.

## Claims

### Claim 1

A process for the formation of flanges on the mouths of containers simultaneous with the cutting of a cylindrical length of a container from an indefinite length wound cylinder of paperboard mounted on a mandrel comprising the application of a cutting blade about the perimeter of the cylinder at a plane generally perpendicular to the longitudinal axis of the cylinder to sever the same, simultaneously with the cutting, applying pressure to the severed cylinder on either side of the cut and about the perimeter to form an outwardly directed flange on each of the severed ends.

### Claim 2 (depends on 1)

A process as defined in claim 1 wherein the pressure is applied by means of a pair of tools mounted adjacent to and on either side of the cutting blade; the tools being set back from the blade so as not to penetrate said cylinder, but contacting the cylinder to provide a slight non-weakening slot.

### Claim 3 (depends on 1, 2)

A process as defined in either claim 1 or 2 wherein the tools are provided with a beveled edge.