Feeding Or Delivering Patents (Class 101/118)
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Publication number: 20010013286Abstract: A stencil sheet retaining device includes a clamping plate (44) for retaining an end portion of the stencil sheet (M), and a flapper member (49) for drawing out the end portion of the stencil sheet (M) from the clamping plate (44) side. A first contact piece (48) attached to the clamping plate (44) and a second contact piece (51) attached to the flapper member (49) are pressed due to the profiles of the cam grooves (56a, 56b) of a movable cam member (56) according to the rotary position of the rotary cylindrical drum (6), so that the clamping plate (44) and the flapper member (49) can be opened and the open angle of the clamping plate (44) and the flapper member (49) can be adjusted.Type: ApplicationFiled: February 13, 2001Publication date: August 16, 2001Inventor: Hiroshi Watanabe
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Patent number: 6237485Abstract: A stencil printer includes a printing drum which is rotated bearing thereon a stencil master, and a press roller which is pressed against the printing drum. A paper supply system supplies a printing paper to between the printing drum and the press roller so that the printing paper is conveyed pinched between the printing drum and the press roller. A paper supply controller controls the paper supply system so that the paper supply system supplies the printing paper to between the printing drum and the press roller at a first predetermined angular position of the printing drum for each rotation of the printing drum. The paper supply controller controls the paper supply system so that the printing paper supplied next by the paper supply system does not collide with the printing paper under printing when the printing paper is overlong.Type: GrantFiled: August 30, 1999Date of Patent: May 29, 2001Assignee: Riso Kagaku CorporationInventor: Shigeki Fukai
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Patent number: 6234076Abstract: An image forming machine includes an image forming section for receiving a sheet supplied in a supplying direction, printing an image on the sheet, and discharging the printed sheet in a discharging direction opposite to the supplying direction while changing the sheet upside-down; a sheet supplying table situated adjacent to the image forming section, the sheet supplying table stacking the sheet to be supplied to the image forming section; a sheet discharging table situated adjacent to the image forming section and disposed vertically relative to the sheet supplying table, the sheet discharging table stacking the sheet having the image printed thereon and discharged from the image forming section; driving mechanism attached to the sheet supplying table and the sheet discharging table for vertically moving the sheet supplying table and the sheet discharging table in directions opposite to each other.Type: GrantFiled: October 21, 1999Date of Patent: May 22, 2001Assignee: Riso Kagaku CorporationInventors: Tomohiro Mizutani, Yasushi Kuratani, Hideaki Nogi
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Patent number: 6227107Abstract: A stencil printer has a rotary printing drum removably supported in a printer body. A lamp is provided inside the printer body, and a control circuit permits, in response to an action necessary for maintenance of the printer body, the lamp means to be turned on.Type: GrantFiled: October 2, 1998Date of Patent: May 8, 2001Assignee: Riso Kagaku CorporationInventors: Tetsuya Hashimoto, Toshihiro Bansyo, Masakazu Miyata, Hitoshi Watanabe
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Patent number: 6213015Abstract: A printer for printing an image on a paper paid out by a pick-up roller and separated from the other papers by a separating device includes a kind-of-paper setting device for allowing the operator of the printer to select and input the kind of papers to be used. A controller automatically selects, among transport conditions stored beforehand in correspondence to the kinds of papers, optimal transport conditions matching with the kind of papers input by the operator in response to a signal received from the kind-of-paper setting device. The operator should only select and input the kind of papers while watching an LCD (Liquid Crystal Display) provided on an operation panel. The printer obviates troubles relating to the transport of papers.Type: GrantFiled: December 30, 1998Date of Patent: April 10, 2001Assignee: Tohoku Ricoh Co., Ltd.Inventors: Mitsuo Sato, Kenji Endo, Toshiharu Hasegawa, Yoshiharu Kanno
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Patent number: 6205918Abstract: A stencil printer includes a plurality of ink drums spaced from each other in the direction of paper conveyance and each having a respective master wrapped therearound. An upstream ink drum and pressing means movable into and out of contact with the upstream ink drum define an upstream print position. A downstream ink drum and pressing means movable into and out of contact with the downstream ink drum define a downstream print position. An intermediate conveyor is located between the upstream print position and the downstream print position for conveying a paper carrying an image printed at the upstream print position toward the downstream print position. A distance which the paper moves from the upstream print position to the downstream print position is longer than a distance between the upstream print position and the downstream print position. Defective printing is reduced even when the peripheral speed of the upstream ink drum and that of the downstream ink drum are different from each other.Type: GrantFiled: March 23, 1999Date of Patent: March 27, 2001Assignee: Tohoku Ricoh Co., Ltd.Inventors: Mituru Takahashi, Hideaki Matsuda
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Patent number: 6186062Abstract: The stencil printing apparatus of the present invention is provided with a stencil making section for perforating each stencil sheet with a desired image pattern, a porous structure printing drum incorporating an ink supply mechanism and coming to have a stencil sheet perforated in the stencil making section to be wound thereon, a sheet supply section for supplying print sheets, a roller for pinching the print sheet supplied from the sheet supply section between the printing drum and itself, and time counting means for counting the rest time of the stencil printing apparatus.Type: GrantFiled: April 6, 2000Date of Patent: February 13, 2001Assignee: Riso Kagaku CorporationInventor: Katsumi Ohno
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Patent number: 6161476Abstract: A stencil printer system includes a stencil printer unit. The printer unit is provided with a master making system which makes a stencil master on the basis of an image read out from an original, a printing system which makes copies of the original by transferring ink to printing sheets through the stencil master, an original conveyor which conveys originals placed in a predetermined position to the master making system one by one, and an original detector which detects whether an original exists in the predetermined position. A post handling unit including a sorter and a stapler is connected to the printer unit. A first mode setting key is manually operable to set the printer unit to a continuous printing mode in which the printer unit repeats making a master and printing copies of the original so long as the original detector detects existence of an original in the predetermined position.Type: GrantFiled: February 26, 1999Date of Patent: December 19, 2000Assignee: Riso Kagaku CorporationInventor: Hideharu Yoneoka
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Patent number: 6112655Abstract: A stencil printer includes a rotary printing drum around which the stencil master is wrapped, a main motor which rotates the printing drum, a press roller which is rotatable in parallel to the printing drum in contact with the printing drum, and a pair of opposed conveyor rollers which feed a printing paper between the printing drum and the press roller. A conveyor roller motor is provided separately from the main motor and drives the conveyor rollers. A printing drum rotation detector detects rotation of the printing drum on the basis of the reference position, and a conveyor roller rotation detector detects rotation of at least one of the conveyor rollers.Type: GrantFiled: December 22, 1998Date of Patent: September 5, 2000Assignee: Riso Kagaku CorporationInventors: Masao Suzuki, Hiroyuki Sunagawa, Hiroshi Kaneda
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Patent number: 6109173Abstract: A stencil printing machine includes a printing drum having a flexible ink-permeable circumferential wall adapted to receive a perforated stencil sheet around an outer circumferential surface thereof, the printing drum being driven to rotate around a central axis thereof; a pressing device situated inside the printing drum for supplying ink to an inner surface of the circumferential wall, the pressing device being movable between a pressing position for pressing the circumferential wall to be deformed radially outwardly and a standing position for releasing the circumferential wall from deformation; an opposing drum disposed adjacent to the printing drum and driven to rotate in a direction opposite to that of the printing drum, the opposing drum having a recess formed in an outer circumferential surface thereof; a clamp disposed on an outer circumferential surface of the opposing drum and operating in synchronization with rotation of the opposing drum to hold a leading edge of a printing sheet supplied betweenType: GrantFiled: September 27, 1999Date of Patent: August 29, 2000Assignee: Riso Kagaku CorporationInventor: Koji Nakayama
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Patent number: 6098537Abstract: In a stencil printer, in order to definitely prevent an ink leakage even when the perforated portion 20c of the printing drum laps over the clamp 25 of the back press roller 14, the portions of a part of the outer circumferential surface of the back press roller positioned adjacent to the rear and opposite side edges of the clamp 25 is provided by a movable circumferential member 66 adapted to bias rearward relative to the clamp in synchronization with the opening operation of the clamp, so as thereby to cancel the clearance formed along the periphery of the clamp without obstructing the opening operation of the clamp.Type: GrantFiled: June 19, 1998Date of Patent: August 8, 2000Assignee: Riso Kagaku CorporationInventors: Koji Nakayama, Yasuhiro Takahashi
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Patent number: 6098536Abstract: A printer of the type wrapping a master around a print drum and pressing a sheet against the master with the print drum or a press drum is disclosed. A sheet clamper is arranged on the press drum. A timing sensing device for allowing the leading edge of the sheet to be fed toward the sheet clamper at a preselecting timing is arranged on the press drum or a member associated therewith. With this configuration, the printer causes the sheet clamper to surely clamp the leading edge of the sheet and prevents the sheet from rolling up. In addition, the printer feeds the sheet at a preselected timing with stability and reliability and thereby enhances accurate registration.Type: GrantFiled: February 18, 1998Date of Patent: August 8, 2000Assignee: Tohoku Ricoh Co., Ltd.Inventor: Eiji Ohkawa
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Patent number: 6076458Abstract: The stencil printing apparatus of the present invention is provided with a stencil making section for perforating each stencil sheet with a desired image pattern, a porous structure printing drum incorporating an ink supply mechanism and coming to have a stencil sheet perforated in the stencil making section to be wound thereon, a sheet supply section for supplying print sheets, a roller for pinching the print sheet supplied from the sheet supply section between the printing drum and itself, and time counting means for counting the rest time of the stencil printing, apparatus.Type: GrantFiled: March 18, 1999Date of Patent: June 20, 2000Assignee: Riso Kagaku CorporationInventor: Katsumi Ohno
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Patent number: 6067902Abstract: A stencil printer capable of printing a multicolor image on a sheet of the present invention includes a plurality of drums arranged side by side in an intended direction of sheet transport at a preselected interval. Ink of particular color is fed to the inner periphery of each drum carrying a respective master around its outer periphery. An intermediate transport device transports a sheet from an upstream drum to a downstream drum. A controller controls the sheet conveyance speed of the intermediate transport device and/or the print conveyance speed of the downstream drum in accordance with the size and/or the position of the sheet. The printer allows a minimum of double printing and misregister to occur by making up for a delay of transport of the sheet to the downstream drum.Type: GrantFiled: May 15, 1998Date of Patent: May 30, 2000Assignee: Tohoku Ricoh Co., Ltd.Inventor: Mituru Takahashi
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Patent number: 6065397Abstract: A stencil printer capable of conveying a paper by clamping the leading edge portion of the paper and printing an image on the paper is disclosed. Even when an envelope or similar relatively thick paper is used, the printer protects a master wrapped around an ink drum from ripping which would bring about various troubles including the contamination of printings due to ink.Type: GrantFiled: August 18, 1998Date of Patent: May 23, 2000Assignee: Tohoku Ricoh Co., Ltd.Inventor: Mitsuo Sato
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Patent number: 6026744Abstract: In stencil printing, a printing matrix is thermally made in a printing matrix area on a stencil material on the basis of image information representing an image on an original. The printing matrix area is determined according to the sheet size of printing paper sheet. The stencil thus obtained is wrapped around a printing drum and a printing paper sheet fed toward the printing drum is pressed against the printing drum by a pressure member. A memory which is provided on the printing drum side stores information on the area of the printing matrix. The sheet size is compared with the area of the printing matrix based on information extracted from the memory. When the former is smaller than the latter, printing is inhibited and an error signal which advises against printing is output.Type: GrantFiled: June 30, 1998Date of Patent: February 22, 2000Assignee: Riso Kagaku CorporationInventor: Masakazu Miyata
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Patent number: 5979311Abstract: A stencil printer includes a rotary printing drum around which the stencil master is wrapped, a main motor which rotates the printing drum, a press roller which is rotatable in parallel to the printing drum in contact with the printing drum, and a pair of opposed conveyor rollers which feed a printing paper between the printing drum and the press roller so that the leading end of the printing paper meets the printing drum in a predetermined position of the printing drum. A conveyor roller motor is provided separately from the main motor and drives the conveyor rollers. A reference position sensor detects a reference position on the printing drum, a printing drum rotation detector detects rotation of the printing drum on the basis of the reference position, and a conveyor roller rotation detector detects rotation of at least one of the conveyor rollers.Type: GrantFiled: December 22, 1998Date of Patent: November 9, 1999Assignee: Riso Kagaku CorporationInventors: Osamu Kakurai, Masao Suzuki, Makoto Miyaki, Hiroyuki Sunagawa
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Patent number: 5970866Abstract: A printing machine comprising a sheet feeding station for feeding sheets into a printing station and capable of being detachably attached into a sheet inlet, a sheet discharging station for discharging printed sheets from the printing station and positioned near a sheet outlet, and a cover disposed near at least the sheet inlet or the sheet outlet and shielding either the sheet inlet or sheet outlet except for at a sheet passing area thereof.Type: GrantFiled: July 21, 1997Date of Patent: October 26, 1999Assignee: Tohoku Ricoh Co., Ltd.Inventor: Eiji Okawa
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Patent number: 5960716Abstract: The invention relates to an impression cylinder (1) intended for a sheet-fed machine and having at least one cylinder gap (3) in which sheet grippers (4) are arranged in such a manner that, when closed, they do not project over the envelope of the peripheral area of the impression cylinder (1). The cylinder gap (3) is provided with a cover (7) which can be adjusted by a controlling unit (9, 10, 11, 12) and is subsequently always in its closed position in which it completely covers the cylinder gap (3), when said gap (3) passes through the nip. Consequently, the impression cylinder rolls with a continuous, closed peripheral area on the cylinder printing the image. In the zones where the sheet is transferred to and from the impression cylinder (1), the cover (7) (preferably controlled by a fixed cam (11) while the cylinder is rotating) is opened to such an extent that the sheet grippers (4) can move into the open position thereof to pick up or release a sheet.Type: GrantFiled: August 12, 1998Date of Patent: October 5, 1999Assignee: De La Rue Giori, S.A.Inventor: Johannes Schaede
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Patent number: 5931090Abstract: A printer of the type wrapping a master around a print drum and pressing a sheet against the master with the print drum or a press drum is disclosed. A pulse encoder is mounted on the press drum for sensing changes in the rotation speed of the press drum, so that a timing for feeding the leading edge of the sheet toward a clamper can be controlled. The clamper is capable of surely clamping the leading edge of a sheet and preventing it from rolling up. The sheet can be fed stably and reliably and can therefore be brought into accurate registration.Type: GrantFiled: March 17, 1998Date of Patent: August 3, 1999Assignee: Tohoku Ricoh Co., Ltd.Inventor: Eiji Ohkawa
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Patent number: 5927190Abstract: A printing machine comprises a printing drum rotationally driven around a central axis of itself. The drum has a cylindrical circumferential wall with an ink-permeable image area and an ink supplying device disposed to an inside of the circumferential wall for supplying ink to an inner surface of the circumferential wall. The machine also comprises a rotatable press roller vertically movably disposed below the drum and for sandwiching a printing body between the drum and the press roller. The machine also comprises a first supporting roller and a second supporting roller. The first supporting roller is disposed before the press roller in a printing body conveyance direction. The second supporting roller is disposed after the press roller in the printing body conveyance direction. Both the first and the second rollers are vertically movable in synchronization with a vertical movement of the press roller and supporting the printing body to be movable in the printing body conveyance direction.Type: GrantFiled: June 22, 1998Date of Patent: July 27, 1999Assignee: Riso Kagaku CorporationInventors: Kenji Yoshimoto, Masami Kanehira, Yoshinori Tanaka, Takeshi Fujimura
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Patent number: 5845571Abstract: A method of printing a document image on a paper by wrapping a stencil, or master, perforated by, for example, a thermal head around a print drum, and a stencil printer. A wedge effect occurs between the print drum and an ink roller disposed in the print drum. The wedge effect, coupled with the pressure of a pressing member, causes ink to exude from the inner periphery to the outer periphery of the print drum and further from the master to the paper. The paper is separated from the master at a position downstream, with respect to the direction of rotation of the print drum, of a portion where the ink exudes due to the wedge effect. At the paper separating position, the ink does not exude from the master, and the ink pressure does not act. This obviates the blur of a printed image and prevents the ink from being transferred from the front of an underlying printing sheet to the rear of an overlying printing sheet stacked on the underlying sheet due to excessive ink transfer.Type: GrantFiled: January 24, 1997Date of Patent: December 8, 1998Assignees: Michio Kurashige, Tohoku Ricoh Co., Ltd.Inventors: Michio Kurashige, Hironobu Takasawa, Tomiya Mori
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Patent number: 5711216Abstract: An apparatus for decorating articles comprises a transport path with at least one decorating station, and at least one article carrier displaced by a circulating transport system along the transport path. The transport system circulates in a horizontal plane and comprises a plurality of rigid rack portions which are interconnected pivotably in the horizontal plane. The transport system is driven by way of a gear. The transport system is guided by guide rollers mounted on a connecting pivot connecting each two adjacent rigid rack portions and they co-operate with guide rails defining at least a portion of the transport path.Type: GrantFiled: February 26, 1997Date of Patent: January 27, 1998Assignee: Werner Kammann Maschinenfabrik GmbHInventors: Gerhard Tiemann, Joachim Hellmeier
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Patent number: 5698034Abstract: A hot melt material coating system (10) is provided, comprising (i) a rotary coater (12) driven by a motor (604); (ii) a rotary coater position, speed and direction indicator (610) operatively connected to the rotary coater and providing a signal representing the position, speed and direction thereof; (iii) a web position, speed and direction indicator (612) operatively connected to the web and providing a signal representing the position, speed and direction thereof; and (iv) a control system (600).Type: GrantFiled: September 26, 1996Date of Patent: December 16, 1997Assignee: Nordson CorporationInventors: Gregory Floyd Clark, James Gordon Himes, Jr.
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Patent number: 5634404Abstract: A stencil printing machine is formed of a perforating section for perforating a stencil sheet produced by bonding a resin film to a substrate with an adhesive; a printing drum on the outer peripheral surface of which the stencil sheet perforated at the perforating section is wrapped with the resin film inside, and, after removal of a substrate from the stencil sheet thus wrapped, printing is done by passing ink supplied to an inner peripheral surface, through the perforated portion of the resin film remaining on the outer peripheral surface; an pressing member for pressing printing paper against the printing drum during printing; a separating device for separating and discharging the substrate from the stencil sheet wrapped around the printing drum, prior to starting printing; and a resin film removing section for removing the resin film of the stencil sheet from the printing drum after completion of printing.Type: GrantFiled: August 28, 1995Date of Patent: June 3, 1997Assignee: Riso Kagaku CorporationInventor: Sadanao Okuda
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Patent number: 5584932Abstract: A hot melt material coating system (10) is provided, comprising (i) a rotary coater (12) driven by a motor (604); (ii) a rotary coater position, speed and direction indicator (610) operatively connected to the rotary coater and providing a signal representing the position, speed and direction thereof; (iii) a web position, speed and direction indicator (612) operatively connected to the web and providing a signal representing the position, speed and direction thereof; and (iv) a control system (600).Type: GrantFiled: April 12, 1995Date of Patent: December 17, 1996Assignee: Nordson CorporationInventors: Gregory F. Clark, James G. Himes, Jr.
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Patent number: 5575204Abstract: To make it possible that the leading end of the stencil proceeds beyond the stencil leading end mounting device toward the stencil exhausting means in the process of exhausting the stencil even when the space required for the open/close operation of the stencil leading end mounting device for mounting the leading end of the stencil to the printing drum of the rotary stencil printer is made small, a snap-up member 84, 86 and 88 is provided adjacent inlet edge of an open/close type clamp member 76 of the stencil leading end mounting device so that the leading end 116 of the stencil released from the clamping by the clamp member 76 in the process of exhausting the stencil is snapped up to the upper side of the clamp member 76.Type: GrantFiled: November 17, 1995Date of Patent: November 19, 1996Assignee: Riso Kagaku CorporationInventors: Muneaki Kawai, Hiroshi Watanabe
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Patent number: 5575213Abstract: A stencil discharging unit of a rotary stencil printing machine has a feeding unit and a stencil discharging container. The feeding unit has a first feeding means and a second feeding means. The first feeding means that is on the upper side includes groups of pulleys and groups of belts. The second feeding means that is on the lower side includes groups of pulleys and groups of belts. The pulleys in each group are pitched at a predetermined interval in an axial direction. The respective pulleys are supported by support members that are independent of one another. Each support member is mounted on a plate member that has bending resiliency. Springs urge the plate member upward. With the plate member bent, the respective pulleys are displaced independently of one another.Type: GrantFiled: October 31, 1995Date of Patent: November 19, 1996Assignee: Riso Kagaku CorporationInventors: Muneaki Kawai, Terutoshi Nakao
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Patent number: 5553547Abstract: A laser generator and a receiver are used to transmit and receive a laser beam for reflection by the leading edge of existing printing on ware to establish an indexing reference for printing to be newly applied to the ware. The receiver provides an electrical signal to disconnect drive motor from a drive train and engage a non-operating screen drive train to stop rotation of the ware. After indexing has been accomplished, the printing cycle is initiated causing silk screen to reciprocate in a synchronous speed with rotation of the ware while a squeegee establishes line contact with a screen to force printing medium through open spaces on the screen onto the ware.Type: GrantFiled: June 6, 1995Date of Patent: September 10, 1996Assignee: Miller Process Coating Co.Inventor: William J. Miller
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Patent number: 5544580Abstract: A mimeographic printing machine including: a pair of first and second sheet supplying rollers, the first sheet supplying roller being movable into and out of contact with the second sheet supplying roller, the first and second sheet supplying rollers clamping a printing sheet when the first sheet supplying roller touches to the second sheet supplying roller, and the first and second sheet supplying rollers being rotatable to convey the printing sheet; a rotary cylindrical drum having a tubular wall on which a stencil paper is wound; a pushing device for pushing the printing sheet conveyed by rotating the first and second sheet supplying rollers against the stencil paper wound on the rotary cylindrical drum in order to perform a mimeographic printing operation; a jamming detector for detecting abnormal conveyance of printing sheets in a printing-sheet conveying path; a preventing device for preventing the first sheet supplying roller from approaching the second sheet supplying roller; and a controller for actiType: GrantFiled: March 1, 1995Date of Patent: August 13, 1996Assignee: Riso Kagaku CorporationInventor: Yasuhiro Takahashi
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Patent number: 5501147Abstract: An apparatus and method for transferring an article from one conveyor to another and a printing system incorporating the same, including an array of endless conveyorized strips carried by a roller and a relatively rigid member, the roller and the member being positioned within the strips, and a mover operatively associated with the roller for effecting its rotation and hence movement of the strips. The apparatus is positioned between and in cooperation with adjacent ends of successive conveyors of a printing system. The surface of each strip is characterized by a series of upwardly extending projections, each projection being of a relatively small diameter in relation to its length. The roller is adjacent to the exit end of the apparatus and has disks positioned longitudinally between the strips and coaxially with and about the roller at intervals across its width.Type: GrantFiled: October 5, 1993Date of Patent: March 26, 1996Assignee: Precision Screen Machines, Inc.Inventors: David Jaffa, Sandor Szarka
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Patent number: 5501148Abstract: An automatic sheet printing and alignment system includes a holding table; a transport system for moving the table through a plurality of stations; a first station for positioning a sheet on the table; a second station for printing features on the sheet positioned on the table; a third station for receiving the printed sheet from its position on the table to compile a stack of sheets with their printed features in predetermined alignment; and a control system for sequentially moving the table through the stations for repeatedly printing and stacking each sheet aligned with prior printed and stacked sheets received, transported and printed by the same table.Type: GrantFiled: September 15, 1994Date of Patent: March 26, 1996Assignee: The Charles Stark Draper Laboratory Inc.Inventors: Stephen L. Bellio, Mark J. Condon, James F. Mueller
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Patent number: 5493968Abstract: An image forming apparatus forms desired images continuously onto print sheets. The apparatus includes a printing part, a primary sheet feed mechanism for extracting one by one the print sheets stacked on a sheet feed table, and a secondary sheet feed mechanism for taking each print sheet extracted by the primary sheet feed mechanism and for feeding the print sheet toward the printing part at a rate corresponding to the printing speed of the printing part. The secondary sheet feed mechanism further comprises a timing roller and a guide roller in contact with the print sheet for feeding thereof, an electromagnetic clutch for intermittently activating one of the timing roller and the guide roller, and a controller for receiving a detection signal showing a rotating status of the printing part and for supplying the electromagnetic clutch accordingly with an output signal in synchronism with the rotating status.Type: GrantFiled: July 8, 1994Date of Patent: February 27, 1996Assignee: Riso Kagaku CorporationInventor: Makoto Ishikawa
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Patent number: 5487333Abstract: To the end of reliably and accurately detecting a failure to properly eject a master plate and positively preventing the occurrence of secondary failures due to a failure to properly eject a master plate, the passage of both the leading edge and the trailing edge of the ejected master plate beyond a prescribed point in the conveying path of ejected master plates is used as an indication of a successful ejection of a master plate.Type: GrantFiled: March 1, 1994Date of Patent: January 30, 1996Assignee: Riso Kagaku CorporationInventors: Susumu Oshio, Tadayuki Igarashi
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Patent number: 5483878Abstract: A mimeographic printing machine includes a flexible rotary cylindrical printing drum, a lower pusher roller, an inside pusher roller, inside pusher roller controller, and printing sheet conveyor. A stencil paper is wound on the outer surface of the flexible rotary cylindrical printing drum. The lower pusher roller is provided in parallel with the flexible rotary cylindrical printing drum with a predetermined space between the lower pusher roller and the flexible rotary cylindrical printing drum and inside the flexible rotary cylindrical printing drum. The inside pusher roller controller moves the inside pusher roller between a deformation position to push the flexible tubular wall radially outwardly thereby to deform the flexible tubular wall towards the lower pusher roller in the case of printing, and a steady position to release the flexible tubular wall from the deformation in the case of non-printing. The printing sheet conveyor moves the printing sheet from the sheet supplying section through the space.Type: GrantFiled: November 10, 1994Date of Patent: January 16, 1996Assignee: Riso Kogaku CorporationInventor: Hiroshi Hanzawa
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Patent number: 5438347Abstract: A master making device incorporated in a stencil printer. The operation for feeding the leading edge of a web or stencil toward a master clamper provided on a print drum is assigned to a platen roller. When the web is to be wrapped around the print drum, the operation for causing the web to form a slack and the operation for applying a tension to the web are implemented only by a tension member which selectively blocks or unblocks a web passageway.Type: GrantFiled: May 19, 1993Date of Patent: August 1, 1995Assignee: Ricoh Company, Ltd.Inventors: Kamichika Shishido, Hidetoshi Aizawa
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Patent number: 5419243Abstract: In a rotary stencil printer in which a back press roller 12 is provided with a transverse groove 26 for receiving a transverse bar 16 of a printing drum 10 and a printing sheet applied with a printing at a nipping region 32 between the printing drum and the back press roller is transferred for a while as attached onto the cylindrical outer circumferential surface of the back press roller by a pinch roller or rollers 40 provided at an outlet side of the nipping region so as to press at a side edge portion or portions of the printing sheet against the outer circumferential surface of the back press roller, the position control of the pinch roller or rollers to conform to the sheet width is carried out in a condition that the pinch roller or rollers are aligned with the transverse groove of the back press roller.Type: GrantFiled: August 11, 1994Date of Patent: May 30, 1995Assignee: Riso Kagaku CorporationInventors: Hiroshi Hanzawa, Yoshikazu Hara, Masakazu Miyata, Koji Nakayama
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Patent number: 5404806Abstract: A printing press feeder capable of sheet feeding from the rear, sheet feeding from the front, or stream feeding from the rear, using tracks above a stock support for the feeder, the sheet feeder head being movably mounted on these tracks, and a movable drive connection from a power source to the sheet feeder head for driving of the sheet pickup advancers in the different head positions. The sheet feeder has first and second alternate drive mechanisms, on opposite ends of the transverse drive shaft, the first drive mechanism having a variable speed drive for sheet feeding individual sheets and slowing feed of each sheet as the sheet approaches the print cylinder, and the second drive mechanism having a constant speed drive for stream feeding overlapping sheets to the print cylinder. The press has nonprint lift cylinders engaging the squeegee mount and actuable to lift the squeegee out of print position, but still within the stencil screen frame, to allow the stencil screen frame to cycle without printing.Type: GrantFiled: August 16, 1994Date of Patent: April 11, 1995Assignee: BecMar Corp.Inventor: Arthur E. Proctor
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Patent number: 5404805Abstract: In a paper ejection device for a stencil printing device provided with a lifting member for producing a curvature in each sheet of ejected printing paper as seen in a cross section perpendicular to the direction of paper ejection, the lifting member is allowed to move at least between a first position which is relatively retracted from the paper ejection passage and a second position which relatively protrudes into the paper ejection passage. The movement of the lifting member may be effected according to the size or the kind of the printing paper or depending on whether a sorter is connected to the printer or not. Thus, an appropriate curvature can be given to the ejected printing paper without requiring any manual work by the user. Thus, a satisfactory paper ejecting operation can be ensured at all times without requiring any manual work by the operator of the stencil printing device.Type: GrantFiled: February 14, 1994Date of Patent: April 11, 1995Assignee: Riso Kagaku CorporationInventors: Yasuhiro Fujimoto, Shinichi Takahira, Yuji Satoh
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Patent number: 5375516Abstract: To provide a stencil printing device of a multi printing drum type which can be reduced in size without complicating the path of conveying printing paper and without compromising the ease of maintenance, a plurality of printing drums are arranged along an inclined line of a prescribed angle of inclination, and the path of conveying printing paper between each pair of adjacent printing drums is defined, for instance, as a straight line. A plate making unit, a plate ejection unit and a paper feeding unit are arranged in the space defined above and below the inclined line along which the printing drums are arranged so that a compact design may be accomplished.Type: GrantFiled: July 14, 1993Date of Patent: December 27, 1994Assignee: Riso Kagaku CorporationInventor: Takanori Hasegawa
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Patent number: 5373785Abstract: A mimeographic transfer printing machine includes a stencil support drum for supporting a stencil, an ink supply device for forcing ink through the stencil supported on the stencil support drum, an ink receiving transfer drum to which the ink forced out from the stencil is to be transferred, and a sheet support device for supporting a printing sheet to which the ink on the ink receiving transfer drum is to be transferred. The stencil support drum has a slightly larger diameter than the transfer drum so that the circumferential speed of the stencil support drum is greater than that of the transfer drum to provide to the stencil a tension acting in a direction opposite to the rotation of the stencil support drum.Type: GrantFiled: July 23, 1993Date of Patent: December 20, 1994Assignee: Riso Kagaku CorporationInventors: Yasuo Yamamoto, Mitsuru Ujiie, Nagon Takita
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Patent number: 5372066Abstract: A printing press feeder capable of sheet feeding from the rear, sheet feeding from the front, or stream feeding from the rear, using tracks above a stock support for the feeder, the sheet feeder head being movably mounted on these tracks, and a movable drive connection from a power source to the sheet feeder head for driving of the sheet pickup advancers in the different head positions. The sheet feeder has first and second alternate drive mechanisms, on opposite ends of the transverse drive shaft, the first drive mechanism having a variable speed drive for sheet feeding individual sheets and slowing feed of each sheet as the sheet approaches the print cylinder, and the second drive mechanism having a constant speed drive for stream feeding overlapping sheets to the print cylinder. The press has nonprint lift cylinders engaging the squeegee mount and actuable to lift the squeegee out of print position, but still within the stencil screen frame, to allow the stencil screen frame to cycle without printing.Type: GrantFiled: August 11, 1993Date of Patent: December 13, 1994Assignee: BecMar Corp.Inventor: Arthur E. Proctor
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Patent number: 5259307Abstract: The rotary screen printing apparatus is designed for ease of operation including adjustments and changes. Registration of the web relative to the print cylinder may be accomplished mechanically or electronically.Type: GrantFiled: May 10, 1991Date of Patent: November 9, 1993Assignee: Illinois Tool Works Inc.Inventors: Robert A. Bourgeois, Jon C. Zook
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Patent number: 5255598Abstract: Screen printing device, comprising an endless printing belt on which a web of material can be fixed temporarily, a printing belt drive device, and a number of rotary stencils driven by stencil drive devices, the printing belt drive device being coupled to the stencil drive devices at a predetermined angle presetting thereof for a synchronous movement thereof. The device also has a signal generation device which can produce a signal forming a measure for a displacement of the printing belt. One or more markings are provided on or in the printing belt and can be detected by detectors securely fixed at predetermined intervals. A comparison device compares the signal coming from the signal generation device, during a displacement of a marking on the printing belt from one detector to a next detector, with a predetermined reference signal, following which a correction device adjusts the angle presetting of one or more stencils on the basis of the comparison result of the comparison device.Type: GrantFiled: July 2, 1992Date of Patent: October 26, 1993Assignee: Stork Brabant B.V.Inventors: Carolus T. J. A. van Sas, Franciscus J. J. van Akkeren, Henricus J. Teeuwen, Robert J. van den Berg, Jan H. Nekkers
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Patent number: 5235907Abstract: A printing machine system includes a printing machine which discharges a printed material after the printing operation is completed. The printing machine system also includes a drier which dries the printed material discharged from the printing machine. A stacker is disposed intermediate the printing machine and the drier. The stacker includes a frame, and a storage for storing the printed materials discharged from the drier. A transfer apparatus is disposed in the proximity of the upper portion of the stacker, for conveying the printed materials discharged from the printing machine to the drier one by one.Type: GrantFiled: December 7, 1992Date of Patent: August 17, 1993Assignee: Sakurai Graphics Systems CorporationInventor: Nobuharu Hirata
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Patent number: 5165338Abstract: A control device for a stencil duplicating machine having a stencil or master making section, printing section, paper feeding section and discharging section in an integrated assembly. Whether or not a master sheet is wrapped around a drum included in the printing section is determined to execute adequate processes stably at all times. A press roller and, therefore, the back of a paper sheet is free from smears otherwise caused by a part of an image area of the master sheet which protrudes from a paper sheet since the master making section is controlled responsive to detected paper size to ensure that the image area on a master sheet is not larger than the paper size detected.Type: GrantFiled: December 21, 1990Date of Patent: November 24, 1992Assignee: Ricoh Company, Ltd.Inventors: Masanobu Okazaki, Kazuyuki Suzuki
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Patent number: 5152218Abstract: A mimeographic printing machine comprises a rotary cylindrical drum rotatable with a stencil supported thereon, an ink supply means for supplying ink to an inner circumferential surface of the cylindrical drum, a clamp disposed on an ink-impenetrable portion of the cylindrical drum for clamping an end of the stencil supported on the cylindrical drum, a stencil support disposed on the ink-impenetrable portion of the cylindrical drum, and peeling means disposed adjacent to the cylindrical drum. The stencil support resiliently contacts with the stencil clamped by the clamp. The peeling means approaches the cylindrical drum in timed relation with the rotation of the cylindrical drum, peeling a paper sheet after printed from the cylindrical drum.Type: GrantFiled: April 15, 1991Date of Patent: October 6, 1992Assignee: Riso Kagaku CorporationInventor: Makoto Ishikawa
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Patent number: 5076161Abstract: A stencil carrier apparatus including a semi-cylindrical driving feed roller, driven feed rollers, a pressure guide plate, and a control cam enables a used stencil from a printing drum to be reliably transported to a stencil receiver so as to be discharged out of a printing apparatus.Type: GrantFiled: July 23, 1990Date of Patent: December 31, 1991Assignee: Riso Kagaku CorporationInventor: Akira Yasuda
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Patent number: 5036759Abstract: An installation for printing fabric pieces having: a fixed printing frame; two take-up drums, situated spaced apart from and facing the terminal edges of the frame, each drum having a horizontal rotary shaft; drive means for causing said drums to rotate; a printing band as a support for the fabric piece to be printed and which is provided with end portions attached to the take-up drums and adapted to slide over the horizontal surface, alternately between a position of maximum take-up on the first drum and a position of maximum take-up on the second drum.Type: GrantFiled: October 24, 1990Date of Patent: August 6, 1991Assignee: Gali Internacional, S.A.Inventors: Antonio P. Olmedo, Fernando O. Fernandez
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Patent number: 5035175Abstract: A mimeographic printing apparatus having a printing drum wound with a stencil and a clamping plate for fastening one end of the stencil on the drum. An elastic holding device is provided over a clamping position with a gap from the drum enough to receive one end of the supplied stencil. The holding device is, at the clamping state, pressed by the clamping plate to fasten one end of the stencil on the printing drum. At the non-clamping position, the holding device returns to the original position and here restrains the external curling of the stencil. The result is that the stencil thereafter reliably introduced to the removing device, thereby realizing a normal stencil-removing operation.Type: GrantFiled: June 20, 1990Date of Patent: July 30, 1991Assignee: Riso Kagaku CorporationInventors: Nagon Takita, Yoshihiro Noguchi