# US 5,341,713 A · Cutting apparatus for corrugated cardboard sheets > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,341,713 A - Document ID: US5341713A - Status: Granted - Kind: A - Application number: 08/052,273 - Filed: 1993-04-14 - Granted: 1994-08-30 - Earliest claimed: 1991-02-28 - Assignees: Mitsubishi Jukogyo Kabushiki Kaisha - Inventors: Arifumi Okamoto; Ikuo Shibayama - Web page: https://patentgrep.com/patent/US5341713A ## CPC - B26D 3/085: {On sheet material} - B26D 7/08: Means for treating work or cutting member to facilitate cutting (tensioning band cutters B26D1/48) - B26D 9/00: Cutting apparatus combined with punching or perforating apparatus or with dissimilar cutting apparatus - B26F 1/384: {using rotating drums} - Y10T 83/023: With infeeding of work - Y10T 83/6489: Slitter station - Y10T 83/6603: Tool shiftable relative to work-conveying means - Y10T 83/7872: Tool element mounted for adjustment - 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) - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract In the present invention, complete cutting is carried out by primary and secondary cutting devices without causing the crush, break or crack of a cut portion even in the case of a composite paper sheet such as a thick corrugated cardboard sheet or the like. There is provided a cutting apparatus for corrugated cardboard sheets which cuts and separates a corrugated cardboard sheet along the direction of travel and positioned upstream from a cylinder cutting portion. The cylinder cutting portion performs secondary cutting and consists of a knife cylinder having a knife and an anvil cylinder. The primary cutting device is provided with a cutter knife for performing primary cutting and is fixed to a bracket and is capable of movement and adjustment in the widthwise direction of the sheet. At the opposite side with respect to the corrugated cardboard sheet is provided a sheet guide capable of movement on a guide rod so as to change a relative position (gap) with respect to the cutter knife. ## Claims ### Claim 1 A cutting apparatus for corrugated cardboard sheets which cuts and separates a corrugated cardboard sheet proceeding in a direction of travel, said cutting apparatus comprising: (a) first means for cutting a corrugated cardboard sheet having a front liner, a rear liner and a core there between, the first cutting means comprising a preliminary cutting means for cutting at least the front liner portion of said corrugated cardboard sheet; and (b) a secondary cutting means for cutting completely through the corrugated cardboard sheet at least where said preliminary cutting means cut at least the front liner portion of said corrugated cardboard sheet; wherein said preliminary cutting means comprises a bracket in an upstream position relative to said secondary cutting means, said bracket being adjustable in a widthwise direction of said cardboard sheet, said bracket comprising a cutter knife having an adjustable knife edge and a sheet Guide provided at the opposite side of the corrugated sheet; wherein said bracket is engagable with a tie bar provided latitudinally in said widthwise direction of said cardboard sheet, and said cutter knife being movable in an axial direction of said tie bar and being fixable in a predetermined position; and wherein said sheet guide is engaged with a guide rod provided latitudinally in the widthwise direction of the sheet, and said sheet guide is capable of movement in the axial direction of the same guide rod and capable of fixing at a predetermined position. ### Claim 2 A cutting apparatus for corrugated cardboard sheets which cuts and separates a corrugated cardboard sheet proceeding in a direction of travel, said cutting apparatus comprising: (a) first means for cutting a corrugated cardboard sheet having a front liner, a rear liner and a core there between, the first cutting means comprising a preliminary cutting means for cutting at least the front liner portion of said corrugated cardboard sheet; and (b) a secondary cutting means for cutting completely through the corrugated cardboard sheet at least where said preliminary cutting means cut at least the front liner portion of said corrugated cardboard sheet; wherein said preliminary cutting means comprises a bracket in an upstream position relative to said secondary cutting means, said bracket being adjustable in a widthwise direction of said cardboard sheet, said bracket comprising a cutter knife having an adjustable knife edge and a sheet guide provided at the opposite side of the corrugated sheet; and wherein said sheet guide is capable of adjustment of a distance to the knife edge of the cutter knife. ### Claim 3 (depends on 2) The cutting apparatus for corrugated cardboard sheets as claimed in claim 2 wherein said sheet guide is engaged with a guide rod provided latitudinally in the widthwise direction of the sheet, and said sheet guide is capable of movement in the axial direction of the same guide rod and capable of fixing at a predetermined position. ### Claim 4 (depends on 2) The cutting apparatus for corrugated cardboard sheets as claimed in claim 2 wherein the bracket provided with said cutter knife is engaged with a tie bar provided latitudinally in the widthwise direction of the sheet, and said cutter knife is capable of movement in the axial direction of the same tie bar and capable of fixing at a predetermined position. ### Claim 5 (depends on 4) The cutting apparatus for corrugated cardboard sheets as claimed in claim 4 wherein said sheet guide is engaged with a guide rod provided latitudinally in the widthwise direction of the sheet, and said sheet guide is capable of movement in the axial direction of the same guide rod and capable of fixing at a predetermined position. ### Claim 6 A cutting apparatus for corrugated cardboard sheets which cuts and separates a corrugated cardboard sheet proceeding in a direction of travel, said cutting apparatus comprising: (a) first means for cutting a corrugated cardboard sheet having a front liner, a rear liner and a core there between first cutting means comprising a preliminary cutting means for cutting at least the front liner portion of said corrugated cardboard sheet; and (b) a secondary cutting means for cutting completely through the corrugated cardboard sheet at least where said preliminary cutting means cut at least the front liner portion of said corrugated cardboard sheet; wherein said preliminary cutting means comprises a bracket in an upstream position relative to said secondary cutting means, said bracket being adjustable in a widthwise direction of said cardboard sheet, said bracket comprising a cutter knife having an adjustable knife edge and a sheet guide provided at the opposite side of the corrugated sheet; and wherein said sheet guide is engagable with a guide rod provided latitudinally in said widthwise direction of said cardboard sheet, said sheet guide being moveable in an axial direction of said guide rod and being fixable in a predetermined position.