# US 9,039,313 B2 · Image forming device with cutter and door locking mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,313 B2 - Document ID: US9039313B2 - Status: Granted - Kind: B2 - Application number: 13/855,151 - Filed: 2013-04-02 - Published: 2013-10-03 - Granted: 2015-05-26 - Earliest claimed: 2012-04-02 - Assignees: Konica Minolta, Inc. - Applicants: Akira Tsunoda - Inventors: Akira Tsunoda - Web page: https://patentgrep.com/patent/US9039313B2 ## CPC - B26D 7/22: Safety devices specially adapted for cutting machines (safety devices in general F16P) - B41J 11/70: cutting perpendicular to the direction of paper feed - 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) - B26D 2007/005: {cutters, e.g. guillotines, used in a label maker or printer} - Y10T 83/613: Work guard - 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) - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A sheet processing device includes a cutter including a movable unit moving toward or away from a predetermined position and cutting a sheet held in the predetermined position, a door provided to a housing having an opening, the door opening and closing the opening for an operation for the cutter. The sheet processing device further includes the housing holding the cutter, a locking member locking and unlocking the door closing the opening and a locking mechanism mechanically connecting the movable unit to the locking member and causing the locking member to lock or unlock the door depending on a position of the movable unit relative to the predetermined position. ## Claims ### Claim 1 A sheet processing device for use with a sheet, the sheet processing device comprising: a cutter comprising a movable unit which moves between a first position close to a predetermined position and a second position away from the predetermined position and cuts a sheet held at the predetermined position; a door provided to a housing having an opening, the door opening and closing the opening provided for maintenance for the cutter, the housing holding the cutter; a locking member which locks and unlocks the door closing the opening; and a locking mechanism which mechanically connects the movable unit to the locking member, wherein the locking mechanism locks the door when the movable unit is located at the second position and the locking mechanism unlocks the door when the movable unit is located at the first position. ### Claim 2 (depends on 1) The sheet processing device of claim 1, further comprising an unlocking member to release the door from the locking member by an operation from an exterior of the sheet processing device. ### Claim 3 A sheet processing device comprising: a cutter including a movable unit which moves toward or away from a predetermined position and cuts a sheet held at the predetermined position; a door provided to a housing having an opening, the door opening and closing the opening provided for a maintenance for the cutter, the housing holding the cutter; a locking member which locks and unlocks the door closing the opening; and a locking mechanism which mechanically connects the movable unit to the locking member and causes the locking member to lock the door if a distance from the movable unit to the predetermined position is a predetermined value or greater and to unlock the door if the distance from the movable unit to the predetermined position is below the predetermined value. ### Claim 4 A sheet processing device comprising: a cutter comprising a movable unit which moves toward or away from a predetermined position and cuts a sheet held at the predetermined position, wherein the movable unit includes a holder including two pinch members facing each other, the holder moving at least one of the pinch members toward or away from the predetermined position to pinch and hold a sheet between the pinch members; a door provided to a housing having an opening, the door opening and closing the opening provided for a maintenance for the cutter, the housing holding the cutter; and a locking mechanism which mechanically connects the movable unit to the locking member and causes the locking member to lock or unlock the door depending on a position of the movable unit relative to the predetermined position. ### Claim 5 (depends on 4) The sheet processing device of claim 4, wherein the movable unit includes a cutter blade which moves toward or away from the sheet held in the predetermined position by the holder and cuts the sheet. ### Claim 6 A sheet processing device comprising: a cutter including movable unit which moves toward or away from a predetermined position and cuts a sheet held at the predetermined position; a door provided to a housing having an opening, the door opening and closing the opening provided for a maintenance for the cutter, the housing holding the cutter; a locking mechanism which mechanically connects the movable unit to the locking member and causes the locking member to lock or unlock the door depending on a position of the movable unit relative to the predetermined position; a detecting unit which detects sheet jam in the sheet processing device; and a controlling unit which drives the movable unit to release the door from the locking member in response to detection of sheet jam by the detecting unit. ### Claim 7 An image forming system comprising: an image forming device forming an image on a sheet; and an sheet processing device wherein the sheet on which the image formed by the image forming device is cut, the sheet processing device comprising: a cutter comprising a movable unit which moves between a first position close to a predetermined position and a second position away from the predetermined position and cuts a sheet held at the predetermined position; a door provided to a housing having an opening, the door opening and closing the opening provided for maintenance for the cutter, the housing holding the cutter; a locking member which locks and unlocks the door closing the opening; and a locking mechanism which mechanically connects the movable unit to the locking member, wherein the locking mechanism locks the door when the movable unit is located at the second position and the locking mechanism unlocks the door when the movable unit is located at the first position.