Class / Patent application number | Description | Number of patent applications / Date published |
271270000 | With means to vary speed of conveyor sheet | 31 |
20080237979 | SHEET CONVEYING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE READING APPARATUS - The present invention provides a sheet conveying apparatus, an image forming apparatus, and an image reading apparatus capable of stably correcting the delay or the advance of a sheet even if sheet conveying rollers such as a skew feeding correction roller and the like are decentered. The delay amount or the advance amount of the sheet being conveyed is detected by a deviation amount detection unit | 10-02-2008 |
20080252001 | Sheet-speed reduction mechanism for fan wheel - A sheet-speed reduction mechanism for a fan wheel including: fan wheels that hold, between fan blades thereof, a signature transported from a printing press thereto, and that rotates with the held signature; a stopper portion that restricts the front end of the signature held between the fan blades, and that then discharges the signature from the inside of the fan wheels; and speed-reduction guides that presses a surface of the signature advancing between the fan blades before the front end of the signature comes into contact with the stopper portion, so as to reduce the advancing speed of the signature. | 10-16-2008 |
20080315514 | SHEET PROCESSING APPARATUS AND SHEET PROCESSING METHOD - There is provided a technique which can greatly improve throughput at the time when, after a folding process is performed to a bundle of sheets, the bundle of sheets subjected to the folding process is transported to a downstream side, and can prevent a wrinkle from occurring in the bundle of sheets at the time of the folding process. A sheet transport speed of a pair of rollers is changed from a first transport speed to a second transport speed at a specified timing between when a folding blade finishes a pressing operation of the bundle of sheets and starts a return operation to a waiting position and when a rear edge of the bundle of sheets pressed into a nip of a pair of rollers by the folding blade passes through the nip of the pair of rollers. | 12-25-2008 |
20090057996 | Sheet Carrying Device and Sheet Carrying Method For Image Forming Apparatus - In an embodiment of the invention, a cam of a pitch adjustment mechanism can be slid and moved along a first shaft. When a sheet is a standard paper, the pitch adjustment mechanism is ejected from an adjustment position by an urging force of a movement spring and is moved to a standby position, and slide contact between the cam and a second shaft is released. When a sheet is a thick paper, a solenoid is turned on, the pitch adjustment mechanism is disposed at the adjustment position by a plunger, and it is prevented that the registration roller pair abruptly come in contact with each other after the thick paper passes through. | 03-05-2009 |
20090057997 | Printer, drive control method, and motor control program for printer - A printer includes a motor, a position calculation unit, a speed calculation unit, a position control unit, a speed control unit, and a switching unit. The motor generates a driving force by which a transported object is transported. The position calculation unit calculates a current position of the transported object through driving the motor. The speed calculation unit calculates a current speed of the transported object through driving the motor. The position control unit controls the motor using at least PI control on the basis of the current position calculated by the position calculation unit and a target position. The speed control unit controls the motor using at least PI control on the basis of the current speed calculated by the speed calculation unit and a target speed. The switching unit switches from control of the motor using the speed control unit to control of the motor using the position control unit at a position that is a predetermined distance before a target stop position to which the motor is driven. | 03-05-2009 |
20090174137 | Exit Shaft Dampening Device to Improve Print Quality - The present invention includes a damping device for a media feed mechanism for a peripheral device having a media feedpath having a feed shaft and a downstream exit shaft. In one form a damping hub is mounted on said exit shaft, a resilient biasing member extending between the damping hub and the feed shaft to create a damping force on the damping hub. In another embodiment damping is provided by a brake structure engaging said damping hub. In yet another embodiment, a brake structure is pivotably mounted. | 07-09-2009 |
20090212492 | DEVICE FOR THE TRANSPORT OF FLAT OBJECTS - A device for transporting flat objects, such as mail items, has two transport tracks and an acceleration device arranged between the transport tracks. The acceleration device includes a clamping pair for holding the objects in a clamped manner on their opposing flat sides while the objects are moving. To be able to carefully accelerate objects of different thicknesses, it is proposed that at least one clamp of the clamping pair includes a segment unit with several segments of different configuration for clamping objects of different thicknesses. | 08-27-2009 |
20090230618 | SHEET BRAKING MECHANISM - A sheet braking mechanism for a sheet punching and/or embossing machine for the braking a sheet in a processing station of the sheet punching and/or embossing machine, includes a movable pneumatic sheet brake and a movable carrier, on which at least one brake brush is mounted. The pneumatic sheet brake and the carrier are mechanically coupled, for example, by a driving element, so that a movement of the pneumatic sheet brake causes a movement of the carrier. | 09-17-2009 |
20090256309 | Code wheel manufacturing method, code wheel, rotary encoder, rotation control unit, belt carrier unit, and image forming apparatus - A manufacturing method for a code wheel for a rotary encoder is provided. The code wheel includes, in a central portion, a hole into which a rotary shaft of a rotary member is fitted and a code portion including a radial code pattern in a circumferential edge portion. The manufacturing method is configured to include the steps of forming the code portion and a reference circle in a plate so that the reference circle has a radius larger than a radius of the hole by a tolerance of deviation between a center position of the code portion and a center position of the hole and has a same center as that of the code portion; and forming the hole in the plate in which the code portion and the reference circle are formed, so as to be contained in the reference circle. | 10-15-2009 |
20090302531 | BELTLESS TANDEM-TYPE IMAGE FORMING APPARATUS - In a beltless tandem-type image forming apparatus of the invention, a plurality of pairs of transfer rollers are placed side by side at intervals along a conveying direction of sheets. A control section independently conveys sheets in sequence through nip sections of respective pairs of transfer rollers driven by a driving section while sequentially transferring images formed by an imaging section onto the sheets. Conveying speeds of the respective pairs of transfer rollers controlled by the driving section are gradually decreased for every pair of transfer rollers from an upstream side toward a downstream side along a conveying direction of the sheets, and consequently, a driving period for driving the respective pairs of transfer rollers to convey each sheet is gradually increased for every pair of transfer rollers from the upstream side toward the downstream side along the conveying direction of the sheets. The control section performs control so that an imaging period by the imaging section is synchronized with a driving period by the driving section in every pair of transfer rollers. | 12-10-2009 |
20100066012 | IMAGE FORMING SYSTEM, IMAGE FORMING APPARATUS, AND SHEET FEEDING APPARATUS - An image forming system capable of controlling a handover timing of sheets between an image forming apparatus and a sheet feeding apparatus at high precision. A transmission path transmits information between the image forming apparatus and the sheet feeding apparatus. A signal line transmits a handover signal output from the image forming apparatus to the sheet feeding apparatus. A first control unit transmits the handover signal to the sheet feeding apparatus after transmitting a feeding start request to the sheet feeding apparatus. A second control unit controls the sheet feeding apparatus to convey the sheet to a predetermined position in the sheet feeding apparatus in accordance with a reception of the feeding start request and of conveying the sheet at the predetermined position to the image forming apparatus in accordance with a reception of the handover signal. | 03-18-2010 |
20100109234 | DRIVE CONTROL METHOD AND DRIVE CONTROL APPARATUS FOR PROCESSING MACHINE - An upstream-side printing unit group and a downstream-side printing unit group, respectively, are driven by separate prime motors and synchronously controlled. In addition to rotary encoders for the upstream-side and downstream-side prime motors, rotary encoders are provided on a last impression cylinder of the upstream-side printing unit group and a first transfer cylinder of the downstream-side printing unit group to detect differences between rotational phases, which the upstream-side and downstream-side printing unit groups should have, and the actual rotational phase of the last impression cylinder of the upstream-side printing unit group or the first transfer cylinder of the downstream-side printing unit group. In accordance with the rotational phase differences, the rotational speeds of the prime motors are corrected. | 05-06-2010 |
20100148433 | MAIL PAPER SEALING APPARATUS - A mail paper sealing apparatus is provided. The apparatus includes an input part, a compression roller part, a driving unit, and a convey accelerator. The input part supplies a mail paper. The compression roller part seals the folded mail paper conveyed from the input part. The driving unit generates a rotary force. The convey accelerator is provided between the input part and the compression roller part and adds a rotation frictional force to a top surface of one side of the mail paper in a convey direction. | 06-17-2010 |
20110037221 | Paper-Handling Installation and Method of Automatically Controlling the Processing Speed Thereof - A paper-handling installation is initially set for executing a job to process a predetermined number of articles during a predetermined time period. During the processing, the number of articles detected which are processed during the predetermined time period is detected. If the detected number of articles is larger than or equal to the predetermined number, the speed at which articles are processed in a section of the paper-handling installation will be increased. If the detected number of articles is smaller than the predetermined number, it will be detected which of the sections of the installation caused a reduction of the throughput, and which installation parameters and/or article parameters existed at that point in time. On the basis of the parameters detected, an installation parameter of the section is then set, and/or the speed is reduced in at least that section. This procedure is repeated until the job has been executed. | 02-17-2011 |
20110101604 | Apparatus for varying the speed of printed products having an external eccentric assembly and method - An apparatus for varying the speed of printed products is provided. The apparatus includes a nip roll rotatable about a nip roll axis and an eccentric assembly external of the nip roll coupled to the nip roll coincident with the nip roll axis. The eccentric assembly is adapted to eccentrically move the nip roll. A method of varying the speed of a printed product in a printing press is also provided. | 05-05-2011 |
20110140357 | MEDIUM CORRECTING DEVICE AND IMAGE FORMING DEVICE - A medium correcting device includes: a first correction section that includes a first adjustment system to adjust mutually pressing forces between a first rod-like rotation body and a second rod-like rotation body, wherein a recording medium on which an image is formed passes between the first and second rod-like rotation bodies, and at least one of the first and second rod-like rotation bodies is driven to rotate at a driving speed according to the mutually pressing forces; and a second correction section that includes a second adjustment system to adjust mutually pressing forces between the circular surface of the first circularly-moving body and the outer circular surface of the belt member, wherein the recording medium passes between the first and second circularly-moving bodes, and at least one of the first and second circularly-moving bodes is driven to rotate at a driving speed according to the mutually pressing forces. | 06-16-2011 |
20110285080 | SHEET DECELERATION APPARATUS AND METHOD - Sheet deceleration apparatus and methods for decelerating a sheet of material for use in a sheet stacking or other application. The deceleration apparatus includes a rotatable cam nip, rotatable about a first axis and provided on one side of the travel path, such that the sheet of material can pass by the cam nip. The cam nip includes a lobe end, such that when the lobe end is away from the travel path, the sheet of material can pass substantially unimpeded past the cam nip, and when the lobe end is near the travel path, the sheet of material is nipped by the cam nip decelerating the sheet of material from the first speed to a second speed. | 11-24-2011 |
20120161390 | Media Sheet Stacking Implement - A media sheet stacking implement for an image forming apparatus according to one example embodiment includes an exit nip formed by a first exit roller and a second exit roller for advancing media in a media process direction along a media path and delivering the media to an output bin of the image forming apparatus. A pinching element is mounted along the media path downstream from the exit nip. The pinching element has at least one first member and at least one second member movable relative to the at least one first member between a closed state and an open state. An actuating mechanism is operatively coupled with the pinching element for moving the pinching element between the closed state and the open state to allow the pinching element to hold a trailing end of a media sheet to be delivered to the output bin when in the closed state. | 06-28-2012 |
20120326387 | SHEET CONVEYING DEVICE, IMAGE FORMING APPARATUS, SHEET CONVEYING MOTOR CONTROL SYSTEM, AND STORAGE MEDIUM - A sheet conveying device includes a first rotator, a second rotator, and a third rotator, at least one of which is configured to convey a sheet medium; a first detection unit configured to detect a first control factor for controlling a first motor that rotates the first rotator; a second detection unit configured to detect a second control factor for controlling a second motor that rotates the second rotator; a motor control unit configured to control a rotational speed of a third motor that rotates the third rotator; and a speed control unit configured to request the motor control unit to change the rotational speed of the third motor based on the sum of the first control factor and the second control factor. | 12-27-2012 |
20130038017 | SHEET PROCESSING DEVICE AND IMAGE FORMING APPARATUS - A sheet processing device includes: a first reservoir unit which reserves sheets; a sheet processing unit which implements predetermined processing for the sheets reserved in the first reservoir unit; a discharge unit which includes a stepping motor, and discharges the sheets from the first reservoir unit, the sheets being subjected to the predetermined processing by the sheet processing unit; an obtaining unit which obtains a value regarding weight of the sheets subjected to the predetermined processing; and a control unit which controls the discharge unit to lower a rotation speed of the stepping motor in a case where the value obtained by the obtaining unit is more than a predetermined value in comparison with a case where the value is less than the predetermined value. | 02-14-2013 |
20130134665 | SHEET CONVEYING DEVICE, IMAGE FORMING APPARATUS, SHEET THICKNESS DETECTION SYSTEM - A sheet conveying device includes a conveying roller provided on an inner side of a curved part of a conveying path of a sheet; a driving unit configured to rotate the conveying roller; a drive control unit configured to control a rotation speed of the conveying roller by the driving unit; a rotation speed detecting unit configured to detect the rotation speed of the conveying roller; a conveying unit configured to convey the sheet laid across the conveying roller and the conveying unit; a conveying speed detecting unit configured to detect a conveying speed of the sheet; and a sheet thickness detecting unit configured to detect a thickness of the sheet based on the conveying speed of the sheet detected by the conveying speed detecting unit and the rotation speed of the conveying roller detected by the rotation speed detecting unit. | 05-30-2013 |
20130181395 | METHOD FOR FEEDING SHEETS TO A PRINTING TECHNOLOGY MACHINE - A method for feeding sheets to a printing technology machine improves reliability of feeding sheets and reduces an acceleration time from a base speed to a production speed. The sheets are conveyed onto a feed table in shingled formation by a first drive and are individually and successively conveyed from the feed table to a first processing station of the machine by a second drive. The sheets are conveyed onto the feed table before an acceleration of the second drive to production speed is completed and the first drive is accelerated to the production speed when the processing station has reached the production speed. | 07-18-2013 |
20130256988 | IMAGE FORMING APPARATUS - When conveyance checking mode is selected, an automatic setting screen is changed. In the automatic setting screen, components such as AD rollers, guide plates or sheet ejection rollers, which are used when conveying the sheet of paper, are selectable. When the components are selected, they are highlighted in color and their names are also represented. The sheets of paper stop at their stop positions corresponding to the selected components. A user removes the sheets of paper from their stop position and checks an image pattern formed on each of the removed sheets of paper. | 10-03-2013 |
20130300057 | SHEET CONVEYANCE DEVICE - A sheet conveyance device including first to third conveyance units, independent driving unit, device driving unit, and control unit. The first conveyance unit includes a first holder that holds one edge of a sheet, and conveys the sheet. The second conveyance unit includes a second holder that holds one edge of the sheet, and conveys the sheet. The third conveyance unit is supported to be swingable between a reception position at which it receives the sheet from the first conveyance unit, and a transfer position at which it transfers the sheet to the second conveyance unit. The third conveyance unit includes a third holder that holds the other edge of the sheet conveyed by the first conveyance unit, and conveys the sheet held by the third holder. The independent driving unit drives the first conveyance unit. The control unit adjusts the speed at which the sheet is conveyed. | 11-14-2013 |
20140042693 | METHOD FOR CONTROLLING SHEET CONVEYANCE IN IMAGE FORMING APPARATUS - An actual sheet interval from a preceding sheet to a succeeding sheet is detected by a top sensor. A registration roller is accelerated or decelerated such that the sheet interval from the preceding sheet to the succeeding sheet is an ideal value by the time that the leading edge of the succeeding sheet reaches a transfer nip part. Note that a time period during which acceleration or deceleration is applied and a sub-scan synchronization signal output timing are determined from the actual sheet interval. Note that a recording sheet P does not stop at the registration roller. | 02-13-2014 |
20140062013 | SHEET CONVEYANCE APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveyance apparatus includes a first conveyance roller configured to convey a sheet, a second conveyance roller configured to convey the sheet at a variable speed ranging from a first sheet conveyance speed to a second sheet conveyance speed wherein the first sheet conveyance speed is less than a sheet conveyance speed of the first conveyance roller and the second sheet conveyance speed is greater than the sheet conveyance speed of the first conveyance roller, a driving unit configured to drive the second conveyance roller, and a control unit configured to control the driving unit | 03-06-2014 |
20140070484 | FEEDER SYSTEM FOR BEVERAGE CONTAINER HOLDER PROCESS - A system includes a sheet holder configured to hold a sheet of blanks, the sheet of blanks including a first blank and a second blank attached to the first blank. A conveyor mechanism is configured to transport the sheet of blanks from the sheet holder to a separator mechanism. The separator mechanism is configured to apply a pulling force to the first blank. A resistance component is configured to apply a resistance force to the second blank to resist the pulling force. The pulling force and the resistance force are configured to separate the first blank from the second blank. | 03-13-2014 |
20140239585 | APPARATUS AND METHOD FOR VARYING SPEED OF SHEET MATERIAL ARTICLES IN A TRIMMER - A trimmer is provided. The trimmer includes an infeed for transporting a sheet material article at a first speed, a trimming station transporter for decelerating the sheet material article for trimming by a trimmer, and a decelerator between the infeed and the trimming station transporter. The decelerator forms a deceleration nip for transferring the sheet material article from the infeed to the trimming station transporter. A method of operating a trimmer is also provided. | 08-28-2014 |
20150054219 | TRANSPORTING DEVICE, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS - Provided is a transporting device including a first contact member having a first contact portion that contacts a medium transported, a second contact member having a second contact portion that contacts the medium transported, on the downstream side of the first contact portion in a transporting direction, the first contact portion and the second contact portion each having a tangential plane, and the tangential planes coinciding with each other, a transporting unit that transports the medium so that a first surface of the medium coincides with the tangential plane in a section of the first contact portion to the second contact portion, and a processing unit that is arranged between the first contact portion and the second contact portion, and performs processing on the first surface of the medium that is passing through a processing region. | 02-26-2015 |
20150145202 | STEPPING MOTOR CONTROL DEVICE AND CONVEYING DEVICE PROVIDED WITH THE SAME - A stepping motor control device includes a driving IC driving a stepping motor by PWM control, and a setting circuit for setting PWM frequency of the driving IC. The setting circuit sets the driving IC such that in stepping motor accelerating and decelerating periods, the PWM frequency of the driving IC becomes higher than the PWM frequency of the driving IC in a constant-speed period of the stepping motor. Thus, power loss of the driving IC in the stepping motor accelerating and decelerating periods can be reduced, and ripple current can be reduced. | 05-28-2015 |
20150343815 | IDLER ROLL WITH RETARD SPIN FUNCTION - A method and apparatus for preventing excess spin of idler rollers after a sheet of paper or other media has passed a media guide with the idler rollers including a retard function within plastic idler rollers. The retard function is provided by adding a retard flexure molded into the idler roller. This adds a brake which stops excess over spin of the idler rollers. | 12-03-2015 |