With Means To Discharge Static Electricity Patents (Class 271/208)
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Patent number: 11780697Abstract: A recording apparatus includes: an output tray into which the paper sheet on which recording has been performed is outputted, wherein the output tray has a rib—includes a pair of first ribs disposed at an upstream position, the pair of first ribs being elongated in an output direction and protruding, and a pair of second ribs disposed at a downstream position, the pair of second ribs being elongated in the output direction and protruding, the output tray has an upstanding end portion (edge receiving section) formed at a downstream end in the output direction, the second rib is formed to be continuous from the edge receiving section, and each of the pair of first ribs and the pair of second ribs are symmetrically arranged to a center (center line) in a width direction, which is perpendicular to the output direction of the paper sheet.Type: GrantFiled: September 28, 2020Date of Patent: October 10, 2023Assignee: Seiko Epson CorporationInventors: Soshi Okawa, Ryoichi Morisawa, Satoshi Tamai, Yoshinori Yanagisawa, Shomaru Kondo
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Patent number: 11199801Abstract: A sheet discharging apparatus includes a discharging unit to discharge a sheet such that the sheet nipped between a first roller and a second roller is warped as viewed from a downstream side in a sheet discharge direction, a sheet supporting member to support the sheet discharged by the discharging unit, and a first charge-removing portion to remove electrostatic charges of the sheet by coming into contact with the sheet at a position downstream of a position where the first roller and the second roller nip the sheet in the sheet discharge direction. In addition, a second charge-removing portion removes electrostatic charges of the sheet by coming into contact with the sheet at a position downstream of the position where the first charge-removing portion comes into contact with the sheet in the sheet discharge direction.Type: GrantFiled: December 18, 2019Date of Patent: December 14, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Kenichirou Isobe
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Patent number: 10906766Abstract: A sheet discharging apparatus includes a discharge portion discharging a sheet in a discharge direction; a sheet supporting portion including a support surface which supports a lower surface of the sheet discharged from the discharge portion; and a conductive portion which is electrically conductive and connected to a ground potential. The conductive portion is provided at the support surface.Type: GrantFiled: November 9, 2018Date of Patent: February 2, 2021Assignee: Canon Kabushiki KaishaInventor: Akihiro Ito
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Patent number: 10295925Abstract: An image forming apparatus includes an image forming section, a conveyance guide and a static eliminator. The image forming section is configured to form the images on a sheet being conveyed along a first conveyance path. The conveyance guide is configured to define a second conveyance path that is designed to convey therealong the sheet being switched back thereto from the first conveyance path, the second conveyance path arranged at a position downstream of the image forming section in a conveyance direction of the sheet conveyed along the first conveyance path. The second conveyance path has an outlet area joined with the first conveyance path at a position upstream of the image forming section. The static eliminator is configured to eliminate static electricity from the sheet fed from the first conveyance path to the second conveyance path. The static eliminator is disposed in the outlet area.Type: GrantFiled: July 12, 2017Date of Patent: May 21, 2019Assignee: KYOCERA Document Solutions Inc.Inventor: Takeshi Yoshida
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Patent number: 10289033Abstract: An image forming apparatus includes a discharging device that discharges a sheet to which a toner image is transferred. The discharging device is disposed on a side opposite to a transfer surface of the sheet to which the toner image is transferred downstream from a nip portion between an intermediate transfer belt and an external secondary transfer roller in a sheet conveyance direction. The discharging device includes a grounded first discharging plate, and a grounded second discharging plate which is disposed downstream from the first discharging plate in the sheet conveyance direction at an angle different from an angle of the first discharging plate.Type: GrantFiled: January 30, 2018Date of Patent: May 14, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Yuusuke Torimaru, Dai Kanai
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Patent number: 9696677Abstract: A sheet conveyance apparatus includes a housing, a rotationally driven conductive shaft, a conveyance roller, a drive transmission unit, a conductive bearing member, a conductive discharging member, a cover member, and a conductive grounding member. The bearing member rotatably supports one end side of a shaft in a sheet width direction. The conductive discharging member is disposed in the openings. The discharging member discharges sheets by contacting the sheets. The cover member is secured to the sidewall along the one end side of the housing in the sheet width direction. The cover member includes a conductive grounding portion for electrical grounding. The conductive grounding member contacts the bearing member and the one end side of the discharging member along the sheet width direction. The grounding member conducts the bearing member and the discharging member to the grounding portion of the cover member.Type: GrantFiled: August 10, 2016Date of Patent: July 4, 2017Assignee: Kyocera Document Solutions Inc.Inventor: Hiroshi Wada
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Patent number: 9643743Abstract: The invention relates to a sleeving device, a set of a mandrel and collector and a method for arranging a sleeve around a product, such as a container, wherein static charges on the sleeve are reduced. Foil is fed over a mandrel, is cut into sleeves, and ejected over containers. According to the invention static charge is removed from the sleeve's inner surface by collecting static charge in a collector arranged on the mandrel. The collector includes electrical filaments positioned along an inner circumference of the sleeve. The charge is discharged afterwards, e.g. using a spark gap, via a discharger mounted on the frame and connected to the earth.Type: GrantFiled: November 9, 2012Date of Patent: May 9, 2017Assignee: FUJI SEAL INTERNATIONAL, INC.Inventor: Frederik Gerardus Heeman
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Patent number: 9187284Abstract: A sheet discharge device includes a sheet discharge portion configured to discharge a sheet, a destaticizing brush coming into contact with the sheet discharged by the sheet discharge portion and destaticizing the sheet, and a guide member turning by being pushed by the sheet discharged by the sheet discharge portion and guiding the sheet to a stacking portion on which the discharged sheet is to be stacked. The guide member includes a guide portion guiding the discharged sheet to the stacking portion and a recede portion provided at a position facing the destaticizing brush and accepting the destaticizing brush deformed by being pushed by the sheet.Type: GrantFiled: August 19, 2014Date of Patent: November 17, 2015Assignee: Canon Kabushiki KaishaInventor: Koki Sato
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Patent number: 8991818Abstract: A sheet conveyor device includes a conveyor that conveys a sheet along a conveyance path in a conveying direction, a sheet stack portion that receives the sheet conveyed by the conveyor, and a conducting member. The conveyor includes an ejection roller that ejects the sheet to the sheet stack portion. The conducting member includes a contact portion, disposed along the conveyance path downstream of the ejection roller, which comes into contact with the sheet conveyed by the conveyor, and a discharge portion that discharges static electricity transferred to the contact portion by contact between the sheet and the contact portion.Type: GrantFiled: September 27, 2013Date of Patent: March 31, 2015Assignee: Brother Kogyo Kabushiki KaishaInventor: Daisuke Kozaki
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Publication number: 20150054215Abstract: A sheet discharge device includes a sheet discharge portion configured to discharge a sheet, a destaticizing brush coming into contact with the sheet discharged by the sheet discharge portion and destaticizing the sheet, and a guide member turning by being pushed by the sheet discharged by the sheet discharge portion and guiding the sheet to a stacking portion on which the discharged sheet is to be stacked. The guide member includes a guide portion guiding the discharged sheet to the stacking portion and a recede portion provided at a position facing the destaticizing brush and accepting the destaticizing brush deformed by being pushed by the sheet.Type: ApplicationFiled: August 19, 2014Publication date: February 26, 2015Inventor: Koki Sato
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Patent number: 8857814Abstract: A sheet ejection device includes a plurality of second sheet abutting members and a plurality of conductive members. Each second sheet abutting member has a non-conductive sheet regulating surface that abuts on a rear end portion in an ejecting direction of each sheet on a sheet output tray to regulate movement thereof. Each conductive member is attached at a position lower than a sheet drop height position and in the vicinity of each second sheet abutting member in a grounded state in the sheet width direction. Each conductive member attracts a rear end portion in the ejecting direction of a sheet on the uppermost layer of a plurality of sheets stacked on the sheet output tray, up to the sheet drop height position on the sheet regulating surface of the second sheet abutting member.Type: GrantFiled: April 18, 2013Date of Patent: October 14, 2014Assignee: Riso Kagaku CorporationInventor: Hiroshi Sugitani
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Publication number: 20140151952Abstract: A sheet conveyor device includes a conveyor that convey a sheet along a conveyance path in a conveying direction, a sheet stack portion that receives the sheet conveyed by the conveyor, and a conducting member. The conveyor includes an ejection roller that ejects the sheet to the sheet stack portion. The conducting member includes a contact portion, disposed along the conveyance path downstream of the ejection roller, that comes into contact with the sheet conveyed by the conveyor, and a discharge portion that discharges static electricity transferred to the contact portion by contact between the sheet and the contact portion.Type: ApplicationFiled: September 27, 2013Publication date: June 5, 2014Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Daisuke Kozaki
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Publication number: 20130285311Abstract: A sheet ejection device includes a plurality of second sheet abutting members and a plurality of conductive members. Each second sheet abutting member has a non-conductive sheet regulating surface that abuts on a rear end portion in an ejecting direction of each sheet on a sheet output tray to regulate movement thereof. Each conductive member is attached at a position lower than a sheet drop height position and in the vicinity of each second sheet abutting member in a grounded state in the sheet width direction. Each conductive member attracts a rear end portion in the ejecting direction of a sheet on the uppermost layer of a plurality of sheets stacked on the sheet output tray, up to the sheet drop height position on the sheet regulating surface of the second sheet abutting member.Type: ApplicationFiled: April 18, 2013Publication date: October 31, 2013Applicant: RISO KAGAKU CORPORATIONInventor: Hiroshi SUGITANI
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Patent number: 8408545Abstract: Apparatus for feeding sheets of paper printed by a printer to a sheet processing device is disclosed where the printer has a sheet discharge outlet and the processing device has a sheet inlet at a different location (e.g., a different height) than the discharge outlet. A sheet conveyor is provided for conveying the sheets from the sheet discharge outlet to the sheet inlet. The apparatus blows air to cool on each sheet as it is conveyed from the discharge outlet to the sheet inlet, and the apparatus at least partially eliminates static electricity from the sheets as they are conveyed.Type: GrantFiled: November 24, 2010Date of Patent: April 2, 2013Assignee: Perfect Systems, LLCInventors: Jeffrey D. Marsh, Lynn W. Swenson, Michael A. Vickers
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Publication number: 20110215519Abstract: A sheet finishing apparatus includes an outer wall having a discharge port of a sheet, a movable tray that stacks the sheet discharged from the discharge port, moves vertically along the outer surface of the outer wall according to a stack amount of the sheet, and has a stacking surface inclined to cause a position of a trailing edge of a sheet to become lower than a position of a leading edge of the sheet, and a support member that is provided at a position outside the outer surface of the outer wall, contacts the trailing edge of the sheet stacked on the movable tray to hold the sheet, and removes static electricity from the sheet.Type: ApplicationFiled: March 4, 2011Publication date: September 8, 2011Applicants: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventor: Yoshiaki SUGIZAKI
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Patent number: 7963521Abstract: A sheet flipping device including a receiving member for receiving a sheet, a flipping volume defined by the flipping movement of the sheet when in operation, a flipping element for flipping the sheet around an axis of rotation within the flipping volume onto the receiving member, and a discharge element arranged adjacent to said flipping volume, the discharge element having a base extending in a direction substantially perpendicular to the direction of the axis of rotation and having multiple electrodes with an end portion extending in a direction towards the flipping volume. The sheet flipping device is useable in a sheet stacking device and an image reproduction apparatus.Type: GrantFiled: November 29, 2007Date of Patent: June 21, 2011Assignee: OCE-Technologies B.V.Inventor: Johannes H. A. Dinnissen
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Publication number: 20110121508Abstract: Apparatus is disclosed for feeding sheets of paper printed by a printer to a sheet processing device, such as a print on demand (POD) book publishing system. The printer has a sheet discharge through which each sheet printed by the printer is discharged or ejected one sheet at a time. The printer heats the sheets to an elevated temperature as the sheets are printed, and the sheets printed by the printer and discharged from the printer carry a static electricity charge. The sheet processing device has a sheet infeed located at a location (height) different from the printer sheet discharge. The apparatus has a sheet conveyor that has an inlet, an outlet, and a conveyor path between the conveyor inlet and the conveyor outlet for conveying the sheets from the printer sheet discharge to the sheet processing device sheet infeed. The sheets are accumulated in a stack within the sheet processing device.Type: ApplicationFiled: November 24, 2010Publication date: May 26, 2011Inventors: Jeffrey D. Marsh, Lynn W. Swenson, Michael A. Vickers
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Patent number: 7900909Abstract: Sheets fed out of a cassette supporting the sheets by a pickup roller are separated and fed by a sheet separation feeding unit having a feed roller and a separating roller which is rotatable in a direction opposite to a sheet feeding direction. A charge eliminating mechanism for eliminating charges of the separating roller is arranged on the upstream side in the sheet feeding direction in a separation nip portion between the feed roller and the separating roller.Type: GrantFiled: November 25, 2009Date of Patent: March 8, 2011Assignee: Canon Kabushiki KaishaInventors: Hiroshi Hiura, Takeshi Suga, Toshifumi Itabashi, Hajime Sekiguchi
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Patent number: 7846279Abstract: A static control device suitable for printers, copiers and the like is disclosed with a manufacturing method therefor. A carrier strip of non-metallic, electrically conductive material, such as plastic, is provided with a plurality of spaced bundles of electrically conductive filaments. The bundles extend beyond the carrier strip, in close proximity to media transported along a media path. In the presence of electrical fields, the filaments induce ionization, and establish a conductive path for charges on the media to the carrier strip for grounding. A strand is attached across the bundles, for improving the structural integrity of the device.Type: GrantFiled: January 21, 2005Date of Patent: December 7, 2010Assignee: Illinois Tool Works Inc.Inventors: Hieyoung W. Oh, Jeffrey W. Richarson
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Publication number: 20100128097Abstract: A conveying apparatus includes a conveyance carrier configured to attract and convey a recording medium, a voltage applying unit configured to apply a voltage to the conveyance carrier to generate electrostatic attraction force on a surface of the conveyance carrier, a static charge eliminating unit configured to eliminate charges on a surface of the recording medium which is electrostatically attracted to the conveyance carrier, and the surface of the conveyance carrier outside an area where the recording medium is attracted, and a reverse voltage applying unit configured to apply a voltage which has a polarity reverse to that of the voltage applied by the voltage applying unit, to the conveyance carrier at a downstream side of the static charge eliminating unit to weaken the electrostatic attraction force of the conveyance carrier.Type: ApplicationFiled: November 19, 2009Publication date: May 27, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Sumitoshi Sootome
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Patent number: 7708271Abstract: An apparatus for accumulating sheets in a stack, such as would be used in a printer or copier, comprises a tray for retaining sheets. A conductive member, which may include brush filaments, is disposed less than 10 mm from a location of an edge of the sheets, and does not contact any sheets on the tray.Type: GrantFiled: August 3, 2006Date of Patent: May 4, 2010Assignee: Xerox CorporationInventor: Wilbert Lee Major, Jr.
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Patent number: 7641188Abstract: Sheets fed out of a cassette supporting the sheets by a pickup roller are separated and fed by a sheet separation feeding unit having a feed roller and a separating roller which is rotatable in a direction opposite to a sheet feeding direction. A charge eliminating mechanism for eliminating charges of the separating roller is arranged on the upstream side in the sheet feeding direction in a separation nip portion between the feed roller and the separating roller.Type: GrantFiled: April 14, 2008Date of Patent: January 5, 2010Assignee: Canon Kabushiki KaishaInventors: Hiroshi Hiura, Takeshi Suga, Toshifumi Itabashi, Hajime Sekiguchi
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Patent number: 7478807Abstract: A method for conveying a sheet includes guiding an electrically charged sheet pneumatically along a desired path, continuously detecting a charge distribution on the sheet, and reducing a positional deviation of the sheet from the desired path by actuating at least one actuating element influencing the position in dependence on the charge distribution. An apparatus for conveying a sheet includes a control device for the position of the sheet and a sensor connected to the control device for detecting an electric field present on the sheet. The method and apparatus permit the sheet to be guided with small deviations from the desired path.Type: GrantFiled: August 15, 2006Date of Patent: January 20, 2009Assignee: Heidelberger Druckmaschinen AGInventors: Andreas Detloff, Bernhard Falk, Michael Füner, Peter Hachmann, Johann Schunn, Peter Thoma
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Publication number: 20080290591Abstract: A static eliminator, provided in a sheet-fed printing press for doing printing on a sheet of paper, and equipped with static electricity removing devices for removing static electricity building up in the sheet, comprises: electrostatic sensors for detecting the amount of static electricity of the sheet; a display/selector having a display section for indicating information to an operator, and a selection section for selecting whether control over the static electricity removing devices is exercised or not; and a control device for controlling the display/selector so as to indicate the information in the display section of the display/selector, and also controlling the static electricity removing devices, based on the information from the electrostatic sensors.Type: ApplicationFiled: May 15, 2008Publication date: November 27, 2008Inventor: You Shimizu
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Patent number: 7280798Abstract: The image forming apparatus has an image bearing member for bearing a toner, a transfer device which forms a transfer area in cooperation with the image bearing member for transferring the toner on the image bearing member onto a recording material, a charge elimination device which is opposed to the recording material at an upstream side of the transfer area in a conveying direction of the recording material thereby eliminating a charge on the recording material, and a control device which controls the recording material so as to form a loop in a position opposed to the charge elimination device, wherein the recording material forms a loop by the control device thereby approaching to the charge elimination device.Type: GrantFiled: March 4, 2005Date of Patent: October 9, 2007Assignee: Canon Kabushiki KaishaInventor: Takayasu Yuminamochi
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Patent number: 7080835Abstract: Disclosed is a sheet discharging apparatus including a charge eliminating member which is provided downstream a pair of swinging rollers for discharging a sheet, and is directed along a sheet discharging direction from its upstream side toward its downstream side. In the sheet discharging apparatus, the charge eliminating member is directed along the sheet discharging direction from its upstream side toward its downstream side, so that an area of the charge eliminating member facing a sheet is made larger than that of a conventional one, and static electricity of the sheet can be surely removed. Particularly, even when the sheet is a color sheet on which a color image charged with more static electricity than a monochromatic sheet is formed, the static electricity of the color sheet can be surely removed.Type: GrantFiled: February 25, 2004Date of Patent: July 25, 2006Assignees: Canon Finetech Inc., Canon Kabushiki KaishaInventors: Atsuteru Oikawa, Hiroshi Suzuki, Yuichi Konno, Atsushi Takada
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Patent number: 7000915Abstract: A sheet conveying apparatus has a conveyor for conveying a sheet to a prescribed position, a pair of reverse-discharge rotating members capable of rotating forward and reverse for feeding the sheet to the conveyor by switchback and an electricity removal unit for removing electricity from the conveyed sheet. The switchback serves to feed a sheet having a maximum conveyable length from the pair of reverse-discharge rotating members to the conveyor and the electricity removal unit is arranged downstream in a sheet discharging direction from a cross over position fro a front edge of the sheet and a back edge of the sheet during discharge of the sheet, and at a downstream side to the sheet discharging direction the pair of reverse-discharge rotating members again.Type: GrantFiled: November 7, 2003Date of Patent: February 21, 2006Assignee: Canon Kabushiki KaishaInventor: Yuichi Makino
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Patent number: 6945529Abstract: A conveying arrangement for sheet quires includes successively arranged conveying devices of which a downstream conveying device as seen in a conveying direction has a lower speed than an upstream conveying device and at least one ionization device for electrostatic charging of the sheet quires. The downstream conveying device includes a suction device for administering suction air to the sheet quires at stationary suction openings.Type: GrantFiled: July 26, 2004Date of Patent: September 20, 2005Assignee: E.C.H. Will GmbHInventors: Günther Hagemann, Frank Herpel, Jürgen Peter
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Publication number: 20040173960Abstract: Disclosed is a sheet discharging apparatus including a charge eliminating member which is provided downstream a pair of swinging rollers for discharging a sheet, and is directed along a sheet discharging direction from its upstream side toward its downstream side. In the sheet discharging apparatus, the charge eliminating member is directed along the sheet discharging direction from its upstream side toward its downstream side, so that an area of the charge eliminating member facing a sheet is made larger than that of a conventional one, and static electricity of the sheet can be surely removed. Particularly, even when the sheet is a color sheet on which a color image charged with more static electricity than a monochromatic sheet is formed, the static electricity of the color sheet can be surely removed.Type: ApplicationFiled: February 25, 2004Publication date: September 9, 2004Applicants: Canon Finetech Inc., Canon Kabushiki KaishaInventors: Atsuteru Oikawa, Hiroshi Suzuki, Yuichi Konno, Atsushi Takada
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Publication number: 20040089992Abstract: The present invention relates to a sheet conveying apparatus comprising a conveying means for conveying a sheet to a prescribed position, a pair of reverse-discharge rotating members capable of rotating forward and reverse for feeding the sheet to the conveying means by switchback andType: ApplicationFiled: November 7, 2003Publication date: May 13, 2004Applicant: CANON KABUSHIKI KAISHAInventor: Yuichi Makino
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Patent number: 6623003Abstract: A sheet material stacking device and an automatic exposure device for a printing plate, capable of stacking a number of interleaf sheets stably and efficiently. A pair of skewered rollers are provided at the sheet material stacking device used for the automatic exposure device. An interleaf sheet, which is fed from an interleaf sheet transport section, is guided by guide plates and nipped by the rollers. The interleaf sheet, while maintaining a so-called stronger pulling tension, is forcibly fed to an interleaf sheet accommodating section and stacked. Even if the interleaf sheet is thin, the interleaf sheet can behave stably as it is being stacked, and a number of the interleaf sheets can be stacked regularly and effectively.Type: GrantFiled: September 18, 2000Date of Patent: September 23, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Koizumi, Kazuhisa Okamoto, Yoshinori Kawamura, Yoshihiro Koyanagi
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Patent number: 6536761Abstract: In order to eliminate charge on an outplane deformed paper money, a paper money handling device includes a paper money storing box for storing a conveyed paper money in the paper handling device, which has a storing mechanism for storing the paper money inside, and a storing guide provided on the storing mechanism has at least a flat part and a concavo-convex part, and a concave portion thereof includes a static eliminating part.Type: GrantFiled: April 6, 2001Date of Patent: March 25, 2003Assignee: Hitachi, Ltd.Inventors: Akira Mochizuki, Goro Sato, Riichi Katou
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Patent number: 6505829Abstract: A sheet treating apparatus for avoiding electrostatic charge accumulation discharges the sheet P, bearing an image thereon, onto discharge sheet stacking trays provided on the side part of the main body, and receives the trailing end of the sheet by the side part of the main body, and is provided with a grounding member for grounding the sheet by contact with the trailing end of the sheet.Type: GrantFiled: November 23, 1999Date of Patent: January 14, 2003Assignee: Canon Kabushiki KaishaInventor: Wataru Kawata
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Patent number: 6241239Abstract: A method and device for output of single sheets from a printer employs a driven first roller pair having a conveying nip in which a respective single sheet is transported and deflected from an approximately vertically proceeding conveying path into an approximately horizontal conveying path. A separation element that suppresses a continued conveying of the respective single sheet on a circumferential surface of a lower roller of the roller pair is arranged in a proximity of the circumferential surface of the lower roller. An edge sensor is arranged preceding the roller as viewed in a conveying direction for determining whether single sheets have pushed on top of one another. A discharge brush electrically discharges one side of the single sheet arranged in the conveying path following the roller pair. A deflection device deflects the single sheet emerging from the conveying nip into a substantially horizontal attitude shortly before the conveying nip as viewed in a direction of the conveying path.Type: GrantFiled: June 1, 1999Date of Patent: June 5, 2001Assignee: Oce Printing Systems GmbHInventors: Gerhard Oberhoffner, Armin Ulber
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Patent number: 6206364Abstract: A paper transport belt and a paper handling apparatus containing a paper transport belt which is made from a composition containing an alkylated chlorosulfonated polyethylene polymer.Type: GrantFiled: February 17, 1999Date of Patent: March 27, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul Norman Brinkman, Thomas George Burrowes
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Patent number: 6155557Abstract: A member for feeding sheets is provided with a core and a cover mounted on the core. The cover is made of a conductive material or one whose coefficient of friction is lower than that of the sheets.Type: GrantFiled: December 18, 1998Date of Patent: December 5, 2000Assignee: Ricoh Company, Ltd.Inventor: Nobutaka Suzuki
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Sheet conveying apparatus and method wherein the sheet is fed without contacting the discharge layer
Patent number: 6152445Abstract: A sheet conveyance apparatus includes a guide for the recording sheet formed by a discharging layer. The layer includes an electrically grounded conductive substrate and an organic conductive fiber thereon. The surface of the guide is in close proximity to the surface of the recording sheet.Type: GrantFiled: December 7, 1998Date of Patent: November 28, 2000Assignee: Konica CorporationInventors: Kazuhiro Hirota, Hisao Hosoya, Satoru Endo, Mamoru Tomotsune, Yuji Kanazawa, Kazuyoshi Omi -
Patent number: 6048119Abstract: A sheet discharge mechanism is provided which is capable of preventing improper sheet transfer. The sheet discharge mechanism includes discharge rollers for moving a recording paper sheet, and an electric discharge brush adjacent to the discharge roller. The electric discharge brush includes a plurality of filaments for removing electrostatic charge generated at the discharge rollers. The filaments of the brush also prevent the recording paper sheet from being moved in unintended directions.Type: GrantFiled: July 6, 1998Date of Patent: April 11, 2000Assignee: Brother Kogyo Kabushiki KaishaInventors: Hiroyuki Kato, Yasuhito Bandai
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Patent number: 5478061Abstract: A sheet post-processing apparatus is arranged such that in the non-staple mode, the leading edges of the sheets transported from the transport rollers are directed so as to be sandwiched between the upper and lower discharge rollers by a movable sheet guide in a non-staple mode position and the sheets are discharged onto a stacking tray through the upper and lower discharge rollers. In the staple mode, the leading edges of the sheets is directed to a discharge opening formed between the upper discharge roller and the movable sheet guide by the movable sheet guide in the staple mode position so as to be dropped onto the staple tray. After being processed by the stapler, the sheets are pushed by a pushing member through the discharge opening onto the stacking tray.Type: GrantFiled: July 1, 1994Date of Patent: December 26, 1995Assignee: Sharp Kabushiki KaishaInventors: Susumu Murakami, Toshiya Mikita, Koji Katamoto, Naoya Okamura, Tomonori Ohata, Kazuya Hamaguchi
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Patent number: 5400208Abstract: Static charge on a charge retaining, somewhat conductive moving web is reduced by a non-contacting apparatus placed at the edge of and coplanar with the moving web. The apparatus is comprised of metallic needles or bristles, a conductive support or other conductive material connecting the needles or bristles in parallel, and an electrical ground connected to the support by an electrical coupling means, which together make up a conductive path for static charges to be removed from the moving web to ground.Type: GrantFiled: October 5, 1993Date of Patent: March 21, 1995Assignee: Eastman Kodak CompanyInventors: Robert J. Pazda, Kenneth L. Clum
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Patent number: 5228373Abstract: In a paper processing machine, the method and apparatus of this invention apply an opposite electrostatic charge to stacks and reams of paper to eliminate the repelling force from like charges on both sides of the individual sheets of the stack or ream to thereby temporarily bond them together. With the sheets thus temporarily bonded, the stacks and reams of paper can be easily transported between work stations without undesirable sliding of the sheets.Type: GrantFiled: August 27, 1991Date of Patent: July 20, 1993Assignee: Robert A. FoisieInventor: Bernhard J. Welsch
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Patent number: 5062764Abstract: In a paper processing machine, the method and apparatus of this invention apply an opposite electrostatic charge to stacks and reams of paper to eliminate the repelling force from like charges on both sides of the individual sheets of the stack or ream to thereby temporarily bond them together. With the sheets thus temporarily bonded, the stacks and reams of paper can be easily transported between work stations without undesirable sliding of the sheets.Type: GrantFiled: January 8, 1990Date of Patent: November 5, 1991Assignee: Robert A. FoisieInventor: Bernhard J. Welsch
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Patent number: 5022640Abstract: A self-contained duplex/simplex feeder module adapted to be used for both top and bottom sheet feeding for simplex and duplex copying includes a pair of feed-in rolls with one of the rolls serving as a feed-out roll when top sheet feeding is required. A static eliminator is also included to enhance the feeding of sheets for duplexing as is a false bottom used for top sheet feeding and normal force device for bottom sheet feeding.Type: GrantFiled: October 28, 1985Date of Patent: June 11, 1991Assignee: Xerox CorporationInventor: Robert L. Greco, Jr.
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Patent number: 4994861Abstract: A printing machine includes a charge neutralizing system for neutralizing static charge on sheets of material fed therethrough. The charge neutralizing system includes a grounded wire (47) located in proximity to the sheets for neutralizing charge on the sheets. The charge neutralizing system further includes a grounded conductive brush (81) mounted on a sheet deflector (61) so that one end of the brush (77) contacts sheets as they traverse a first sheet feed path (71) and the other end of the brush (79) contacts sheets are they are routed by the deflector to a second alternative sheet feed path (63). The grounded brush (81) further serves to decelerate the sheet as it exits the printing machine over the second sheet feed path (63).Type: GrantFiled: June 30, 1989Date of Patent: February 19, 1991Assignee: International Business Machines CorporationInventors: Fred Y. Brandon, James P. Harden, Paul D. Horrall, Troy A. Lee, Kermit A. Meece
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Patent number: 4951935Abstract: A paper stacker for an image forming apparatus is free from jams ascribable to curls of paper sheet which are apt to occur in hot and humid environments, and jams ascribable to static electricity which is apt to deposit on paper sheets in dry environments. When paper sheets are curled due to a large water content, the curl is sensed to inhibit further stacking operations. When paper sheets are electrostatically charged due to a small water content, the charge is dissipated before the paper sheets are stacked. The charge which may remain on a paper sheet having been stacked is immediately discharged when the paper sheet approaches feelers.Type: GrantFiled: June 14, 1989Date of Patent: August 28, 1990Assignee: Ricoh Company, Ltd.Inventor: Morio Oikawa
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Patent number: 4887805Abstract: A top vacuum corrugation feeder employs a vacuum feedhead working in conjunction with an air knife to feed sheets from the top of a stack. The feedhead is valveless and has a vacuum applied thereto during the entire feed cycle in order to increase reliability and decrease minimum feed speed. The air knife includes trapezoidal shaped fluffer jets in front of the stack and side fluffer jets and added on the sides of the stack in order to assist the feedhead in separating severely downcurled sheets for feeding. A rotational damper member is positioned above and has a portion thereof resting on the stack for controlling sheet flutter and leakage of air from the stack sides. A belt coast control member controls the precise stopping position of vacuum belts that surround the vacuum feedhead in order to minimize multifeeding of sheets from the stack.Type: GrantFiled: March 10, 1988Date of Patent: December 19, 1989Assignee: Xerox CorporationInventors: Glenn M. Herbert, Charles S. Kneisel, Russell McDonald, Raymond A. Povio, Michele D. Zirilli
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Patent number: 4830357Abstract: An extremely compact sorting apparatus includes a plurality of trays, each tray having a pin on each side of an entry portion side where a recorded sheet is received. The tray pins are guided by a vertical guide groove disposed on a frame so as to form a tray entry portion, as cam wheels with slots shift trays one level upwardly or downwardly. A transport plate for guiding a recorded sheet pivotally supports a discharge roller shaft and a cam wheel shaft coaxially. Furthermore, a motor for driving the discharge rollers and a motor for driving the cam wheels are mounted on the transport plate to provide a transport unit. When a recorded sheet is inserted onto the transport plate, it is detected by a detector, so that the drive of the discharge rollers begins and the recorded sheet is discharged to the tray entry portion. When this discharge is completed, the drive of the cam wheels begins so that the trays are shifted by one level.Type: GrantFiled: August 10, 1987Date of Patent: May 16, 1989Assignee: Ikegami Tsushinki Co., Ltd.Inventors: Chikado Goto, Kenji Hayashi, Toshio Sakuuchi
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Patent number: 4823942Abstract: A static conductive document transport belt for use in electrostatic copiers, photosensitive copiers, and paper collating devices. The composite belt is made from an ethylene-propylene copolymer or terpolymer rubber with an electrically conductive inner layer containing conductive carbon black and an outer layer which is light reflective.Type: GrantFiled: August 21, 1987Date of Patent: April 25, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Billy P. Martin, Larry D. Goettsch
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Patent number: 4824094Abstract: A suction roll sheet transfer device disposed between a sheet feed table and the front lays of a sheet fed rotary printing press including a first set of suction rolls adapted for oscillating movement between a position substantially in the plane of said feed table for engaging successive sheets under suction pressure and transferring the sheet in register toward the front lays of the press and a raised position for engaging a preceeding sheet and separating it from the following sheet disposed therebelow, even when the sheets are in strongly adhering relation to each other during high speed printing operations. Suction pressure is communicated to the suction rolls in predetermined timed intervals, commencing upon retraction of the suction rolls substantially to the plane of the feed table.Type: GrantFiled: August 27, 1987Date of Patent: April 25, 1989Inventor: Claus Simeth
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Patent number: 4757903Abstract: An arrangement for feeding banknotes includes a gripping device for transferring the notes from one part of a transport path to another part. The gripping device comprises two coacting rollers 174,174', of which one 174 is journalled in a movable bridge 175 which, in turn, is journalled in a movable link element 173. One of two co-acting wheels 171,172 is also journalled in the link element and can be moved away from the remaining wheel 172 in dependence on the passage of notes in the transport path. Upon transportation of a note to the gripping device, and in dependence on the output from a detector 121, the link element 173 with the bridge 175 is first rotated through a short distance, wherewith the wheels 171, 172 no longer co-act with one another, whereafter the bridge is rotated through a short distance in relation to the link element causing the rollers 174, 174' to co-act with one another.Type: GrantFiled: July 2, 1986Date of Patent: July 19, 1988Assignee: Inter Innovation ABInventor: Gosta N. Edin