# US 8,739,667 B2 · Rotary cutting apparatus with vibration attenuation means > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,667 B2 - Document ID: US8739667B2 - Status: Granted - Kind: B2 - Application number: 13/431,167 - Filed: 2012-03-27 - Published: 2012-10-11 - Granted: 2014-06-03 - Earliest claimed: 2011-04-08 - Assignees: Sandvik Intellectual Property AB - Applicants: Pierre-Luc Dijon; Arnaud Pras - Inventors: Pierre-Luc Dijon; Arnaud Pras - Web page: https://patentgrep.com/patent/US8739667B2 ## CPC - B26F 1/384: {using rotating drums} - B26D 7/265: {Journals, bearings or supports for positioning rollers or cylinders relatively to each other} - B26D 3/10: Making cuts of other than simple rectilinear form (cutting-out B26F) - B26D 3/14: Forming notches in marginal portion of work by cutting (by punching B26F1/12) - Y10T 83/483: With cooperating rotary cutter or backup - Y10T 83/4833: Cooperating tool axes adjustable relative to each other - Y10T 83/8749: By pivotal motion - B26F: PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING (marking-out, perforating or making buttonholes A41H25/00; shoemaking A43D; surgery A61B; punching metal B21D; drilling metal B23B; cutting of metal by applying heat locally, e.g. flame cutting, B23K; cutting by abrasive fluid jets B24C5/02; details common to machines for severing B26D; drilling wood B27C; drilling 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; of glass C03B; of leather C14B; of textile materials D06H; for light guides G02B6/25; of tickets G07B) - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Rotary cutting apparatus has a frame, a first rotary device and a second rotary device. Each of the first and second rotary devices has a shaft concentrically arranged about a rotational axis and a drum and are arranged in the frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane. A pair of bearing housings is arranged on either side of each of the drums. A first pair of bearing housings is movable relative to the frame in a transverse direction to the first rotational axis by means of a force means. Means is provided for passive vibration attenuation of at least the first shaft, the means being able to reduce vibrations due to impacts of the first drum in relation to the second drum. ## Claims ### Claim 1 A rotary cutting apparatus, comprising a frame; a first rotary device comprising a first shaft concentrically arranged about a first rotational axis and a first drum concentrically arranged on said first shaft, said first shaft provided with a first pair of bearing housings arranged on either sides of said first drum; and a second rotary device comprising a second shaft concentrically arranged about a second rotational axis, and a second drum concentrically arranged on said shaft, said second shaft provided with a second pair of bearing housings arranged on either sides of said second drum, wherein said first and second rotary devices arranged in said frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane; wherein said second shaft connected to the frame via said second pair of bearing housings, wherein said first shaft associated with said frame via said first pair of bearing housing, said first pair of bearing housings movable relative to said frame in a transverse direction to said first rotational axis by means of a force means, and wherein means is provided for passive vibration attenuation of at least said first shaft, said means being able to reduce vibrations due to impacts of the first drum in relation to said second drum. ### Claim 2 (depends on 1) A rotary cutting device according to claim 1, wherein said first pair of bearing housings are connected to an intermediate piece slidingly arranged in relation to said frame via at least one guide member, and wherein said force means comprises a pneumatic cylinder for pressing the first drum via said intermediate piece towards said second drum such that they come into a cutting relationship with one another, and at least one spring means for applying a force counter directed to that of the pneumatic cylinder, said means for vibration attenuation comprising at least one elastomeric member. ### Claim 3 (depends on 2) A rotary cutting device according to claim 2, wherein said spring means is a helical spring and said elastomeric member is hollow, said elastomeric member being arranged substantially coaxially to said helical spring. ### Claim 4 (depends on 3) A rotary cutting apparatus according to claim 3, wherein said frame is provided with a part having a substantial C-shaped cross-section on either sides of said first shaft, said part having an upper shank and a lower shank interconnected via an interconnecting portion, said guide member being arranged between said upper shank and said lower shank, said elastomeric member and said helical spring member being arranged substantially coaxially to said guide member. ### Claim 5 (depends on 4) A rotary cutting apparatus according to claim 4, wherein said elastomeric member has a circular cross-section. ### Claim 6 (depends on 1) A rotary cutting apparatus according to claim 1, wherein said first rotary device comprises a rotary anvil and wherein said second rotary device comprises a rotary cutter. ### Claim 7 (depends on 1) A rotary cutting apparatus according to claim 1, wherein the first and second rotary devices are a rotary cutter or a rotary anvil and wherein the first and second drums are an anvil drum or a cutter drum.