# US 9,039,002 B2 · Sheet post-processing apparatus with function of punching sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,002 B2 - Document ID: US9039002B2 - Status: Granted - Kind: B2 - Application number: 13/967,458 - Filed: 2013-08-15 - Published: 2014-02-27 - Granted: 2015-05-26 - Earliest claimed: 2012-08-24 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Yasuo Fukatsu; Hitoshi Kato; Naoki Ishikawa; Taishi Tomii - Web page: https://patentgrep.com/patent/US9039002B2 ## CPC - B65H 35/04: from or with transverse cutters or perforators - B26D 5/00: Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting - B26D 5/32: with the record carrier formed by the work itself - B26D 5/34: scanning being effected by a photosensitive device - B26F 1/0092: {Perforating means specially adapted for printing machines (B26F1/02 - B26F1/46 take precedence)} - Y10T 83/162: With control means responsive to replaceable or selectable information program - Y10T 83/178: Responsive to work - Y10T 83/538: Positioning of tool controlled - Y10T 83/541: Actuation of tool controlled in response to work-sensing means - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - 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 A sheet post-processing apparatus which is capable of shortening time wasted until actual start of punching and enhancing productivity. A drive unit causes a moving member which has a cam and reciprocates. A punching member is driven by a movement of the cam of the moving member and punches a sheet when the moving member moves forth and moves back. A determination unit determines a type of the sheet. A control unit controls, when a sheet to be punched is to be subjected to a punching process, the drive unit such that the moving member starts moving before conveyance of the sheet to be punched stops, and controls, when the sheet to be punched is to be subjected to the punching process, the drive unit such that timing with which the moving member starts moving is changed based on the determination by the determination unit. ## Claims ### Claim 1 A sheet post-processing apparatus comprising: a moving member configured to have a cam and reciprocate; a drive unit configured to cause said moving member to reciprocate; a punching member configured to be driven by a movement of the cam of said moving member and punch a sheet when said moving member moves forth and moves back; a determination unit configured to determine a type of the sheet; and a control unit configured to, when a sheet to be punched is to be subjected to a punching process, control said drive unit such that said moving member starts moving before conveyance of the sheet to be punched stops, and when the sheet to be punched is to be subjected to the punching process, control said drive unit such that timing with which said moving member starts moving is changed based on the determination by said determination unit, wherein a type of an immediately preceding sheet punched prior to the sheet to be punched is a first type, said control unit controls said drive unit such that said moving member starts moving with earlier timing compared to a case where the type of the immediately preceding sheet is a second type that puts a heavier load on said drive unit than the first type. ### Claim 2 A sheet post-processing apparatus comprising: a moving member configured to have a cam and reciprocate; a drive unit configured to cause said moving member to reciprocate; a punching member configured to be driven by a movement of the cam of said moving member and punch a sheet when said moving member moves forth and moves back; a determination unit configured to determine a type of the sheet; and a control unit configured to, when a sheet to be punched is to be subjected to a punching process, control said drive unit such that said moving member starts moving before conveyance of the sheet to be punched stops, and when the sheet to be punched is to be subjected to the punching process, control said drive unit such that timing with which said moving member starts moving is changed based on the determination by said determination unit, wherein the type of the sheet is determined based on at least one of a thickness of the sheet, a basis weight of the sheet and a surface property of the sheet. ### Claim 3 (depends on 1) The sheet post-processing apparatus according to claim 1, wherein timing with which said moving member starts moving is set such that timing with which conveyance of the sheet to be punched stops coincide with actual start of punching by said punching member. ### Claim 4 (depends on 1) The sheet post-processing apparatus according to claim 1, further comprising a receiving unit configured to receive input of information on the type of the sheet, wherein said determination unit determines the type of the conveyed sheet based on the information received by said receiving unit. ### Claim 5 (depends on 1) The sheet post-processing apparatus according to claim 1, further comprising a sensor configured to detect a thickness of the conveyed sheet, wherein said determination unit determines the type of the conveyed sheet based on the thickness of the sheet. ### Claim 6 (depends on 1) The sheet post-processing apparatus according to claim 1, further comprising: an input unit for inputting information on each of the basis weight of the sheet and the surface property of the sheet; and a storage unit configured to store the input information, wherein said determination unit determines a type of the sheet based on the information stored in said storage unit. ### Claim 7 A sheet post-processing apparatus comprising: a moving member configured to have a cam and reciprocate; a drive unit configured to cause said moving member to reciprocate; a punching member configured to be reciprocated, when said moving member moves forth and moves back, by a movement of the cam of said moving member, and punch a sheet; a measurement unit configured to measure a travel amount of said moving member; a detection unit configured to detect, with respect to a position of said moving member at timing with which said punching member changes a direction of movement in reciprocating movement, a first state in which said moving member is distant by a predetermined distance in a first direction between the directions of movement of said moving member and a second state in which said moving member is distant by the predetermined distance in a second direction opposite to the first direction; and a control unit configured to, in a case where a sheet to be punched is subjected to a punching process, (i) control said drive unit such that said moving member starts moving before conveyance of the sheet to be punched is stopped, (ii) control said drive unit such that said drive unit stops driving when a first travel amount of said moving unit measured by said measurement unit from when said drive unit starts driving until said detection unit detects the first state and a second travel amount of said moving unit measured by said measurement unit after said detection unit detected the second state become equal, and (iii) control said drive unit so as to cause said moving member to move to a predetermined position by a third travel amount of said moving member, which is measured by said measurement unit from when said drive unit stops driving until said moving member stops, by changing the direction of movement of said moving member. ### Claim 8 (depends on 7) The sheet post-processing apparatus according to claim 7, wherein said control unit set the predetermined position as a movement starting position of said moving member in a case where the punching process is subjected to a next sheet to be subjected.