# US 11,298,847 B2 · Device and method for cutting an extruded pipe to length

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,298,847 B2
- Document ID: US11298847B2
- Status: Granted
- Kind: B2
- Application number: 16/973,833
- Filed: 2019-06-10
- Published: 2021-08-12
- Granted: 2022-04-12
- Earliest claimed: 2018-06-15
- Assignees: Battenfeld-Cincinnati Germany GmbH
- Applicants: Battenfeld-Cincinnati Germany GmbH
- Inventors: Heinrich Dohmann; Klaus Becker; Joerg Droege
- Web page: https://patentgrep.com/patent/US11298847B2

## CPC

- B26D 3/166: {Trimming tube-ends}
- B26D 5/086: {Electric, magnetic, piezoelectric, electro-magnetic means}
- B26D 1/60: and is mounted on a movable carriage
- B26D 3/16: Cutting rods or tubes transversely {(cutting tubes longitudinally B26D3/001)}
- B29C 48/0022: {combined with cutting}
- B29C 48/09: Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C 48/90: with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29L 2023/22: {Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004)}
- 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)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A method cuts an extruded pipe to length using a separating device. The separating device includes a separator rotating about an extrusion axis of the extruded pipe, the separator being rotatably mounted in the separating device, and cutting tools being arranged on the separator. The cutting tools are configured to carry out the separation. The method includes transferring energy to move the cutting tools. The energy is transferred from a stationary outer region of the separating device to a movable inner region of the separating device. The energy is transferred continuously or cyclically and the transferred energy is buffered in an energy storage device. The energy is transferred inductively or capacitively. A discharge time of the energy storage device is between 2% and 25% of a total separation cycle.

## Claims

### Claim 1

A method for cutting an extruded pipe to length using a separating device comprising a separator rotating about an extrusion axis of the extruded pipe, the separator being rotatably mounted in the separating device, and cutting tools being arranged on the separator, the cutting tools configured to carry out separation, the method comprising:
transferring energy to move the cutting tools, wherein:
the energy is transferred from a stationary outer region of the separating device to a movable inner region of the separating device,
the energy is transferred continuously or cyclically and the transferred energy is buffered in an energy store,
the energy is transferred inductively or capacitively, and
a discharge time of the energy store is between 2% and 25% of a total separation cycle wherein the energy is buffered in the energy store to move the cutting tools to carry out the separation.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the energy is transferred to a capacitor, the energy store being the capacitor.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the energy is transferred via a bearing in which a stator and a rotor are arranged for energy transfer.

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the energy transfer takes place in a manner coupled with a force transmission.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein the energy transfer takes place via metal parts incorporated into a belt.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein the energy transfer takes place via slip rings.

### Claim 7 (depends on 1)

The method as claimed in claim 1, wherein the energy transfer comprises low currents not requiring safeguards against electric shock.