# US 4,397,204 A · Rotary sheeters to suit them to the cut of wood veneers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,397,204 A - Document ID: US4397204A - Status: Granted - Kind: A - Application number: 06/223,098 - Filed: 1981-01-07 - Granted: 1983-08-09 - Earliest claimed: 1980-01-14 - Assignees: Colombo & Cremona S.A.S. - Inventors: Aristide Colombo - Web page: https://patentgrep.com/patent/US4397204A ## CPC - B27L 5/08: Severing sheets or segments from veneer strips; Shearing devices therefor; Making veneer blanks, e.g. trimming to size {(making match sticks from veneer B27L9/00; making a layered cutting block B27L5/00)} - B26D 1/626: {for thin material, e.g. for sheets, strips or the like} - B26D 5/34: scanning being effected by a photosensitive device - B26D 7/2614: {Means for mounting the cutting member} - Y10T 83/178: Responsive to work - Y10T 83/2185: Suction gripper - Y10T 83/4664: With photo-electric work-sensing means - Y10T 83/4705: Plural separately mounted flying cutters - Y10T 83/4838: With anvil backup - Y10T 83/533: With photo-electric work-sensing means - Y10T 83/543: Sensing means responsive to work indicium or irregularity - Y10T 83/748: With work immobilizer - B27L: REMOVING BARK OR VESTIGES OF BRANCHES (forestry A01G); SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER - 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 This invention refers to a multiple edge rotating blade type sheeter for cutting wood veneers, employing a main edged blade, designed to cut the progressing wood veneers in a minimum length equal to the arc between two successive cutting edges, and an auxiliary edged blade designed to remove a strip strictly containing a defective part of the wood veneer from each cut wood veneer, the main and auxiliary edged blades being opportunely spaced and their operations being controlled by means of an electronic apparatus. ## Claims ### Claim 1 A rotary sheeter for cutting wood veneer material in sections, comprising a first conveyor belt for advancing the material towards a cutting zone; a main multiple edge rotary blade and a first holding-up roller mounted at the cutting zone and cooperating with said main blade to cut the material in a minimum length depending on an arc between two successive cutting edges of said main blade; motor drive means; first friction clutch means connected between said drive means and said main blade to operate the latter; a scanning device for inspecting the advancing material surface to detect possible imperfections thereon and generating signals in accordance with those imperfections; an electronic device for receiving the signals from said scanning device and storing said signals; an incremental pulse generator connected to said electronic device and operative for measuring the length of the passing sheet materials and controlled by said electronic device to operate said first friction clutch means; a rotary auxiliary multiple edge blade extended parallel to said main blade and being spaced therefrom in the direction of advancing of the sheet material; an auxiliary holding-up roller cooperating with said auxiliary blade; second friction clutch means connected to said motor drive means and to said auxiliary blade and electrically connected to said electronic device to operate said auxiliary blade to execute a cut intermediate a section of the material advanced from said main blade, said second friction clutch means being controlled by a signal generated by said electronic device and said incremental pulse generator when said scanning device detects the imperfections on the advancing material, so that said electronic device takes into consideration the spacements between said scanning device, said main blade and said auxiliary blade and said auxiliary blade is operated to execute said intermediate cut on the passing section of said material to cut a traversal strip containing an imperfection from said section. ### Claim 2 (depends on 1) The rotary sheeter as defined in claim 1, further including a further conveyor belt positioned between said main blade and said auxiliary blade to move the material from said main blade to said auxiliary blade. ### Claim 3 (depends on 2) The rotary sheeter as defined in claim 2, further including a delivering conveyor belt and a discarding conveyor belt provided immediately downstream the auxiliary blade, the supporting plane of said discarding conveyor belt being synchronically inclinable with the passing of the cut transversal strips, to eliminate them and to feed the delivering conveyor belt with the perfect veneer sections only. ### Claim 4 (depends on 3) The rotary sheeter as defined in claim 3, wherein the conveyor belts are formed by parallel continuous strips provided with suction holes, the sheeter further including a suction caisson and a fan, the suction caisson being positioned below said strips and having lateral walls tapered downwards for the connection to a suction part of the fan, so that the veneer sheets are prevented from sliding along said continuous strips. ### Claim 5 (depends on 1) The rotary sheeter as defined in claim 1, wherein said main blade and said auxiliary blade are provided with coaxial shoulder rollers distributed along their axes and each having a diameter smaller than the width of said blades, so that the cutting edges of the respective blades project beyond their periphery, said main and auxiliary blades being further each provided with at least one pressure roller mounted in contact with respective shoulder rollers and rotating at the same rotation speed and being provided along its periphery with recesses circumferentially spaced from each after and being so registered to receive a respective cutting edge of the respective blade when said cutting edge passes through a tangency zone, said pressure rollers counteracting the tendency of the respective blade to bend in the moment of the cutting operation. ### Claim 6 (depends on 5) The rotary sheeter as defined in claim 5, said main blade and said auxiliary blade having an odd number of cutting edges, wherein a corresponding pressure roller is provided for each shoulder roller, the axis of said pressure roller being disposed on a vertical plane passing through the axis of the respective blade. ### Claim 7 (depends on 5) The rotary sheeter as defined in claim 5, said main blade and said auxiliary blade having an even number of cutting edges, wherein two pressure rollers are provided for each shoulder roller, said pressure rollers being symmetrically disposed with respect to a vertical plane passing through the axis of the respective blade and being operative for transmitting to the respective shoulder roller a resultant bias directed according to a cutting direction.