# US 2019/0168478 A1 · Creasing device and corresponding method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168478 A1 - Document ID: US20190168478A1 - Status: Published application - Kind: A1 - Application number: 15/870,280 - Filed: 2018-01-12 - Published: 2019-06-06 - Earliest claimed: 2011-03-30 - Assignees: Panotec S.R.L. - Inventors: Giuseppe Capoia - Web page: https://patentgrep.com/patent/US20190168478A1 ## CPC - B31B 50/25: Surface scoring - B26D 7/00: Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting (cutters B26D1/00; arrangements for guiding hand cutting tools B26B29/06; punching tools or dies, cutting-out knives or dies B26F) - B31B 50/042: {using rolls, belts or chains} - B31B 50/20: Cutting sheets or blanks - B31F 1/10: by rotary tools - B26D 2007/0093: {for embossing, forming, creasing, flange forming} - B31B 50/256: {using tools mounted on a drum} - B31B 2120/70: having corrugated or pleated walls - B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B) - 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) - B31F: MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making layered products not composed wholly of paper or cardboard B32B) ## Abstract A creasing device for a work unit of a machine for at least creasing and possibly cutting a sheet made of a relatively rigid material, such as corrugated cardboard for packaging, fed in a predetermined work direction, includes a first creasing member mounted rotatable with its first axis of rotation transverse to the work direction, and a pre-creasing system disposed upstream of the first creasing member in the work direction, and configured to carry out a pre-creasing which progressively deforms the material of the sheet to be worked before it is subjected to a creasing operation. ## Claims ### Claim 1 A creasing device for a longitudinal work unit of a machine for creasing and cutting a sheet made of a relatively rigid material, such as corrugated cardboard for packaging, fed in a predetermined work direction, comprising: a first creasing member mounted to be rotatable with a first axis of rotation transverse to the predetermined work direction, and a pre-creasing device having a second pre-creasing member disposed upstream of the first creasing member in the work direction, and configured to carry out a pre-creasing which progressively deforms the material of the sheet to be worked before the sheet is subjected to a creasing operation, wherein the pre-creasing device defines a lead-in surface inclined toward the first creasing member with respect to the sheet, the lead-in surface progressively compressing the sheet toward the first creasing member, wherein the lead-in surface is shaped with a profile having a desired geometry, wherein the first creasing member and the second pre-creasing member are idle, wherein a transmission element is wound around the first creasing member and the second pre-creasing member and is rotatable around the first creasing member and the second pre-creasing member following contact with the advancing sheet, wherein a segment of the transmission element, situated between the first creasing member and the second pre-creasing member and facing the sheet, provides the lead-in surface, wherein an intermediate member made of relatively rigid material is positioned between the first creasing member and the second pre-creasing member and has a lower edge with a circular and downwardly bulged convex profile, and wherein the lower edge of the intermediate member has a groove for receiving and guiding a lead-in surface of the transmission element in order for the lead-in surface to have a circular shape which simulates and reproduces a segment of a creasing tool with a diameter larger than a diameter of the first creasing member for achieving the progressive linear compression of the material of the sheet. ### Claim 2 (depends on 1) The device as in claim 1, wherein the first creasing member is a first creasing disc and the second pre-creasing member is a second pre-creasing disc. ### Claim 3 (depends on 2) The device as in claim 2, wherein the first creasing disc has a larger diameter than the second pre-creasing disc and an axis of rotation of the first creasing disc is aligned and parallel on a same plane to an axis of rotation of the second pre-creasing disc, at a same height with respect to a lying plane of the sheet which is being worked. ### Claim 4 (depends on 3) The device as in claim 3, wherein a distance between the axes of rotation of the first creasing member and the second pre-creasing member, together with a ratio between the diameters thereof, is correlated to a desired conformation to be obtained for the lead-in surface. ### Claim 5 (depends on 1) The device as in claim 1, further comprising a support element adapted to pivot and support both the first creasing member and the second pre-creasing member, the support element comprising a first portion which supports and pivots the first creasing member and a second portion, extended upstream of the first creasing member in the work direction, in order to support and pivot the second pre-creasing member, the intermediate member being secured to the support element between the first creasing member and the second pre-creasing member. ### Claim 6 (depends on 1) The device as in claim 1, wherein the lead-in surface connects the first creasing member to the second pre-creasing member along a trajectory which achieves a desired and progressive linear compression of the material of the sheet. ### Claim 7 (depends on 1) The device as in claim 1, further comprising a guiding member for the segment of the transmission element, the guiding member causing the member to acquire a convex profile toward the sheet. ### Claim 8 (depends on 7) The device as in claim 7, wherein the convex profile has a radius of curvature of 450 mm. ### Claim 9 (depends on 1) A machine for at least creasing and cutting a sheet made of a relatively rigid material, such as corrugated cardboard for packaging, comprising: a creasing device as in claim 1. ### Claim 10 (depends on 9) The machine as in claim 9, further comprising a cutting tool disposed downstream of the creasing device.