# US 2014/0360333 A1 · Hard-metalcutting blade arrangement for chucking in a round receiver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360333 A1 - Document ID: US20140360333A1 - Status: Published application - Kind: A1 - Application number: 13/915,611 - Filed: 2013-06-11 - Published: 2014-12-11 - Earliest claimed: 2013-06-11 - Assignees: Tigra GmbH - Applicants: Tigra GmbH - Inventors: Eduard Sprow; Thomas Sprow - Web page: https://patentgrep.com/patent/US20140360333A1 ## CPC - B26D 7/2614: {Means for mounting the cutting member} - B26D 1/0006: {Cutting members therefor} - B26D 2001/002: {Materials or surface treatments therefor, e.g. composite materials} - B26D 2001/004: {not rotating} - Y10T 83/9457: Joint or connection - 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 In a hard metal cutting blade arrangement with blade installation in a cylindrical chucking block for cutting sheets of materials, comprising a cutting blade of a hard metal in the form of an elongate plate body with a blade ground onto a front area thereof and a rear area forming a plate-like shaft, a cylindrical metal chucking block is provided through which an axial slot extends diametrically almost over the whole diameter with a slot width corresponding to the thickness of the shaft of the cutting blade and the cylindrical surface of the chucking block is cut back radially at both sides of the slot over the length of the chucking block. ## Claims ### Claim 1 A hard metal cutting blade chucking arrangement for cutting parts from sheet materials, comprising: a cutting blade (10) of hard metal consisting of an elongate planar body with a front area having a cutting edge (11) ground thereon and a rear, plate-like shaft (12), and a cylindrical chucking block (20) provided with an axial slot (23) which extends diametrically over most of the diameter of the chucking block (20) and whose width corresponds to the plate width of the shaft (12) of the cutting blade (10), the cylindrical circumferential surface of the chucking block (20) being recessed radially inwardly along, and at opposite sides of, the ends of the slot (23). ### Claim 2 (depends on 1) The blade chucking arrangement according to claim 1, wherein opposite the open end of the axial slot (23) a planar surface area (21) is machined into the outer surface of the chucking block (20) so as to extend at a right angle to the axial slot (23) which surface area (21) forms an engagement area for a clamping screw for fixing the chucking block (20). ### Claim 3 (depends on 2) The blade chucking arrangement according to claim 2, wherein the axial slot (23) extends also through, the planar surface area (21). ### Claim 4 (depends on 1) The blade chucking arrangement according to claim 1, wherein the cylindrical circumferential surface of the chucking block (20) is provided along the open end of the longitudinal slot (23) with inclined areas (24) forming radial recesses (24) over the length of the chucking block (20). ### Claim 5 (depends on 1) The blade chucking arrangement according to claim 1, wherein at the front end of the chucking block (20) the longitudinal slot (23) extends over the full diameter of the chucking block (20) and forms at the transition to the remaining longitudinal slot an axial stop which cooperates with a corresponding step formed on the shaft (12) of the cutting blade (10). ### Claim 6 (depends on 1) The blade chucking arrangement according to claim 1, wherein the longitudinal slot (23) is formed by precision electro-erosion. ### Claim 7 (depends on 6) The blade chucking arrangement according to claim 6, wherein, in the area of the ends of the chucking block (20) area through which the longitudinal slot (23) extends, the longitudinal slot (23) is somewhat narrowed to the extent that the width of the slot in the narrowed areas corresponds to the dimensions of the shaft (12) of the cutting blade (10). ### Claim 8 (depends on 7) The blade chucking arrangement according to claim 7, wherein in an axial front area of the longitudinal slot (23) where the slot (23) extends over the whole diameter of the chucking block (20) no narrowing of the slot is provided.