Class / Patent application number | Description | Number of patent applications / Date published |
271265040 | Thickness sensor | 30 |
20080224392 | IMAGE SCANNING APPARATUS AND IMAGE SCANNER - In an image scanning apparatus, when documents on a document tray are sequentially transferred, different control steps are performed according to a scanning speed when an upper surface height of the documents is lowered thereby turning off a height detection sensor. In a low scanning speed, the document tray is elevated one time until the upper surface height becomes a target height which is higher by a predetermined distance since a height detection sensor is turned on at an inter-transfer time between completion of document transfer and start of a subsequent document transfer. In an intermediate scanning speed, the document tray is elevated little by little in each transfer of one document at the inter-transfer time until the upper surface height reaches the target height. In a fast scanning speed, the transfer of the document is tentatively interrupted, the document tray is elevated one time until the upper surface height reaches the target height, and the transfer of the document is resumed. | 09-18-2008 |
20090085284 | OVERLAPPED CONVEYANCE DETECTION APPARATUS FOR PRINTING SHEET - In an apparatus which detects overlapped conveyance of a printing sheet using ultrasonic wave attenuation, when a printing sheet with an IC tag is conveyed, the position of the IC tag on the printing sheet is acquired. By reference to the acquired IC tag position, overlapped conveyance detection is performed at a position which is not under the influence of the IC tag. | 04-02-2009 |
20090115127 | Method and Device for Transporting a Flat Object - A method and a device transport a flat object, especially a mail item, over a conveyor path. The transport device has two conveyor elements, a thickness sensor and a gap-altering device. With the aid of the thickness sensor the thickness of the object is measured, before the object reaches the conveyor path. With the aid of the gap-altering device the gap between the two conveyor elements is set to a computed value. The effect of this setting is that after the setting the gap is smaller than the measured thickness and the difference between the measured thickness and the gap is smaller than a predetermined limit. This setting is concluded before the subject matter reaches the conveyor path. The two conveyor elements clamp the object for a time between themselves and transport the clamped object over the conveyor path. | 05-07-2009 |
20090212491 | Sheet conveying device and image forming apparatus - A second rotary member is arranged opposite to a first rotary member to form a nip between them. A driving unit drives the first rotary member. A sheet-width measuring unit measures a width of a sheet to be fed into the nip. A speed compensating unit compensates a fluctuation of a rotation speed of the first rotary member occurring when the sheet is fed into the nip. The speed compensating unit adjusts a compensation target value for compensating the fluctuation of the rotation speed of the first rotary member based on the width of the sheet measured by the sheet-width measuring unit. | 08-27-2009 |
20100117295 | PAPER THICKNESS DETECTING APPARATUS - A paper thickness detecting apparatus | 05-13-2010 |
20100133745 | REMAINING SHEET VOLUME DETECTING APPARATUS AND IMAGE FORMING APPARATUS - A remaining sheet volume detecting apparatus includes a loading unit that loads a sheet; a driving unit that lifts up the loading unit to a feed position of a loaded sheet; a feeding unit that feeds a sheet from the loading unit that has reached the feed position; a load thickness detecting unit that detects a load thickness of sheets within the loading unit based on a movement amount of the loading unit until the loading unit reaches the sheet feed position; a sheet thickness detecting unit that detects a thickness of a sheet fed by the feeding unit from the loading unit that has reached the feed position; and a remaining sheet volume calculating unit that calculates remaining sheet volume within the loading unit. | 06-03-2010 |
20100140866 | MECHANISM AND METHOD OF MULTIPLE DOCUMENTS FEEDING DETECTION - The present invention provides a multiple documents feeding detection mechanism includes an advancing roller applying a driving torque, a retarding roller applying a resisting torque and connected to the advancing roller for transporting pieces of documents, and a detecting means. The friction of a surface of the advancing roller, the friction of a surface of the retarding roller, the driving torque and the resisting torque are tuned to urge the retarding roller either into rotation while one signal document fed into a nip between the advancing roller and the retarding roller, or in standstill while multiple document fed into the nip. The detecting means determines whether the multiple documents feeding is caused by monitoring an action of the retarding roller. | 06-10-2010 |
20100301551 | THICKNESS DETECTOR OF PAPER - A paper-sheet-thickness detecting device includes a reference roller provided on a fixed rotation shaft; a detection roller provided to face and come into contact with the reference roller; a detection block in which the detection roller is provided at one end and the other end is rotatably fixed around a fulcrum shaft so that the detection block is turned and displaced according to a thickness of a paper sheet passing through between the reference and detection rollers; a holding block that holds the fulcrum shaft; a first pressing member fixed to the holding block to maintain contact between the detection and reference rollers by pressing the detection block, the first pressing member being displaced according to rotation and displacement of the detection block when the paper sheet passes through between the reference and detection rollers; and a displacement detector that detects a displacement amount of the first pressing member. | 12-02-2010 |
20110006476 | Sheet post-processing apparatus and image formation system provided with the apparatus - To provide a sheet post-processing apparatus enabling a sheet to be aligned in a predetermined collection position irrespective of the weighing capacity of the sheet and image formation surface in dropping and collecting the sheet onto a tray from a sheet discharge outlet, the apparatus has a tray means for collecting a sheet from the sheet discharge outlet, and a sheet discharge rotating body for transferring the sheet that is carried out to the tray means toward a sheet end regulation means, and is configured to be able to adjust the timing of shifting the sheet discharge rotating body to an operation position engaging in the sheet from a withdrawal position above the tray corresponding to image formation conditions of the sheet. | 01-13-2011 |
20110049799 | SHEET THICKNESS MEASUREMENT - A method of measuring a thickness of a sheet being conveyed on a transport path includes rotating a substantially cylindrical reference surface disposed in the transport path and engaging a probe with the reference surface to determine a runout value for each of a set of positions along a circumference of the reference surface. The method further includes conveying the sheet on the transport path so that the sheet contacts the reference surface at one position of the set, engaging the probe with the sheet at the one position to determine a measured sheet thickness value, and adjusting the measured sheet thickness value based on the runout value for the one position to obtain an actual sheet thickness value. | 03-03-2011 |
20110156347 | SHEET FEEDER, ORIGINAL DOCUMENT TRANSPORT DEVICE, IMAGE FORMING APPARATUS, AND SHEET FEEDING METHOD - Provided is a sheet feeder, which includes: a sheet placing table; a rotary body which is movable and sends out sheets; a sheet placement detection portion for detecting placement of sheets; an upper limit detection portion for detecting that the rotary body has reached an upper limit position; a transport detection portion for detecting transport of sheets; and a control part which rotates the rotary body so as to perform sheet feeding operation regardless of a detection state of the upper limit detection portion when sheets are set on the sheet placing table, determines that a non-feed jam has occurred when no sheet arriving is detected, and stops rotating the rotary body by determining that the sheet feeder is brought into a sheet feeding restriction state, when sheets are set again on the sheet placing table and the rotary body is detected to be in the upper limit position. | 06-30-2011 |
20110210505 | SHEET THICKNESS DETECTION DEVICE AND IMAGE FORMING APPARATUS - An image forming apparatus capable of accurately detecting a thickness of various sheets. A CPU of the image forming apparatus sets the degree of amplification to a large value, if a sheet basis weight is equal to or less than a threshold value, and sets the degree of amplification to a small value, if the sheet basis weight is larger than the threshold value. One of magnetic sensors, which are disposed facing respective ones of magnets mounted to a displacement member of a sheet thickness detection device of the image forming apparatus, is selected according to the set degree of amplification. When a sheet passes through a detection part of the displacement member, a displacement of the detection part amplified through the displacement member is detected by the selected sensor and a sheet thickness is detected based on an output of the sensor. | 09-01-2011 |
20110210506 | SHEET THICKNESS DETECTION DEVICE AND IMAGE FORMING APPARATUS - A sheet thickness detection device capable of accurately detecting a thickness of sheets of various types. In a case that information about sheets stored in a sheet feed unit is set by a user through an operation unit or through an external host PC, a CPU of the sheet thickness detection device sets a pressure changeover solenoid to ON to obtain a strong nip pressure between a detection roller and a fixed roller, if a sheet basis weight specified in the information about sheets is larger than a predetermined value, and sets the pressure changeover solenoid to OFF to obtain a weak nip pressure, if the sheet basis weight specified in the information about sheets is equal to or less than the predetermined value. | 09-01-2011 |
20110278791 | MULTIFEED PROCESSING APPARATUS, MULTIFEED PROCESSING METHOD, AND MULTIFEED PROCESSING PROGRAM - A multifeed processing apparatus includes a control unit and is connected to a multifeed detecting mechanism and an image reading mechanism. The control unit includes (i) a calculating unit that calculates a shape of a peripheral edge of a medium from any one or both of an output of the image reading mechanism and an image of the medium read by the image reading mechanism, (ii) a detecting unit that detects a change in the shape on a boundary of an overlap detected portion, from the shape calculated by the calculating unit and a position of the overlap detected portion detected by the multifeed detecting mechanism, and (iii) a deciding unit that determines a case where the change in the shape is detected by the detecting unit, as a multifeed. | 11-17-2011 |
20110285079 | DOUBLE SHEET FEED DETECTOR AND METHOD - A double sheet detector includes a pair of rollers forming a nip through which a fed sheet passes, causing the rollers to separate. The amount of separation is transmitted to a transducer which generates a signal proportional to the sheet thickness. Signals from the transducer are frequently sensed and averaged over one or more full revolutions of the rollers, so that signal variations resulting from irregularities in the shape of the rollers are canceled out. | 11-24-2011 |
20110309572 | PAPER THICKNESS DETECTING APPARATUS - A paper thickness detecting apparatus includes a first sensor and a second sensor in which the electrostatic capacitance changes when a piece of paper such as a bank note or a piece of copying paper is inserted, and a thickness detecting unit for detecting the thickness of the piece of paper from the signals obtained from the respective first sensor and the second sensor, in order to provide a paper thickness detecting apparatus that can reliably detect a foreign object adhered to the paper. | 12-22-2011 |
20120007308 | IMAGE FORMING APPARATUS - If a jam detecting portion detects a sheet jam, a rear end position of the jammed sheet is computed based on information, when a rear end of the jammed sheet is located within an area A | 01-12-2012 |
20120104692 | DOCUMENT FEEDING DEVICE THAT PERFORMS AN INITIAL OPERATION, IMAGE FORMING APPARATUS INCLUDING THE SAME, AND METHOD OF CONTROLLING A DOCUMENT FEEDING DEVICE THAT PERFORMS AN INITIAL OPERATION - Provided is a document feeding device including: a document feeding portion for feeding a document; a document set detecting portion for detecting presence/absence of a set document; a determination portion for determining whether power supply to the device is started by turning-on of main power or by cancellation of a power saving mode; an initial operation portion for performing an initial operation of initializing the document feeding portion when the power supply to the document feeding device is started by the turning-on of the main power, and restricting execution of the initial operation when the power supply to the document feeding device is started by the cancellation of the power saving mode; and a display portion for displaying, when there is a set document at the start of the power supply, a request to reset the document. | 05-03-2012 |
20120205864 | MEDIA PATH RE-PHASING - A method of controlling the average sheet velocities in the separate paths in a parallel architecture to prevent sheet collision and provide for sheet arrival in the proper order at the sheet merger point(s) in the media path. Modifying the travel time of the sheets, or re-phasing strategy, at various points along the media path ensure that sheet collision is avoided even at maximum capacity. Adjusting the velocity of the sheets allow for the printer to run at maximum capacity without jamming and collision of the sheets running therethrough. | 08-16-2012 |
20120326386 | DOUBLE-FEED DETECTION APPARATUS AND IMAGE FORMING APPARATUS - A double-feed detection apparatus includes a sensor configured to detect double feed of transfer materials conveyed along a conveying path, and a control unit configured to execute detection of the transfer material under conveyance plural times with the sensor, and to determine the double feed of the transfer materials based on detection results. The control unit determines a detection timing based on both a distance along the conveying path from the sensor to an image forming unit which forms an image on the transfer material and a length of the transfer material in the feed direction. | 12-27-2012 |
20130075970 | Double Document Detection Apparatus and a Method for Conducting the Same - An apparatus is disclosed. The apparatus includes a document processor and electronics connected to the document processor. The electronics includes a document sensor system and means for determining a document processing situation of a plurality of document processing situations. The document sensor system is connected to the means. The plurality of document processing situations include a single document situation and a double document situation. The double document situation includes a partially-overlapped, double document situation and a completely overlapped, double document situation. A method is also disclosed. | 03-28-2013 |
20140054853 | PAPER CONVEYING APPARATUS, JAM DETECTION METHOD, AND COMPUTER-READABLE, NON-TRANSITORY MEDIUM - There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium which can precisely determine any occurrence of a jam by a sound which is generated by paper for various types of paper. The paper conveying apparatus includes a sound signal generator, provided with a sound detector near a conveyance path of a paper, for generating a sound signal corresponding to a sound generated by a paper during conveyance of the paper, a paper thickness setting module for setting a thickness of a paper conveyed to the conveyance path, and a sound jam detector for determining whether a jam has occurred based on a signal of a specific frequency band in the sound signal, wherein the sound jam detector determines the specific frequency band based on a thickness of the paper. | 02-27-2014 |
20140159305 | SHEET EJECTION APPARATUS WITH GAP SETTING UNIT ACCORDING TO SHEET THICKNESS - According to one embodiment, a sheet ejection apparatus includes an ejection unit, a thickness detection unit, a thickness storage unit, a sheet detection unit, an acquisition unit, a setting unit, and an adjustment unit. The ejection unit ejects a sheet. The thickness detection unit measures a thickness of the sheet. The thickness storage unit stores thickness information. The acquisition unit acquires a thickness of a preceding sheet. The setting unit sets a gap between the preceding sheet and the sheet in accordance with the thickness of the preceding sheet. The adjustment unit adjusts timing for supplying the sheet to a conveyance path in accordance with the gap. | 06-12-2014 |
20140239584 | CONVEYING DEVICE - There is provided a conveying device including a controller that makes a conveying speed of a printing medium conveyed by a first conveyor unit be higher than a conveying speed of a printing medium conveyed by a second conveyor unit and makes the printing medium be conveyed while forming sagging on the printing medium between the first and second conveyor units. The controller makes a sheet sensor acquire the amount of light, which passes through the printing medium conveyed between a light emitting part and a light receiving part, as the amount of received light and determines whether or not the double-feed of the printing media has occurred only when this amount of received light is smaller than the double-feed criterion amount of received light at substantially the same conveying distance of the printing medium conveyed by the first conveyor unit. | 08-28-2014 |
20150008640 | SHEET THICKNESS DETECTOR, SHEET CONVEYOR INCORPORATING SAME, AND IMAGE FORMING APPARATUS INCORPORATING SAME - A sheet thickness detector incorporated in a sheet conveyor and/or an image forming apparatus includes multiple first rollers aligned in a direction perpendicular to a sheet conveying direction, multiple second rollers facing the respective first rollers, a first roller shaft supporting two first rollers, at least one second roller shaft supporting rollers other than the two first rollers, at least one third roller shaft to support at least three second rollers, a first roller shaft holder supporting the first roller shaft to move from the at least one third roller shaft in a contact/separation direction, a biasing member biasing the first roller shaft toward at least one third roller shaft, and a displacement amount detector detecting an amount of displacement of the first roller shaft. A thickness of a sheet between the first and second rollers is detected based on a detection result by the displacement amount detector. | 01-08-2015 |
20150108714 | SHEET THICKNESS DETECTOR AND IMAGE FORMING APPARATUS INCLUDING SAME - A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member. | 04-23-2015 |
20150356806 | THICKNESS MEASUREMENT DEVICE FOR SHEET-TYPE MEDIUM - A thickness measurement device for a sheet-type medium comprises: a fixing frame ( | 12-10-2015 |
20160060070 | PAPER SHEET HANDLING APPARATUS - A paper sheet handling apparatus that recognizes by using a recognition unit and counts paper sheets being transported via a transport path includes a dust tray that is arranged inside a housing of the paper sheet handling apparatus for collecting dust generated inside the housing and that can be pulled out of the paper sheet handling apparatus from a front surface thereof. | 03-03-2016 |
20160090256 | SHEET DISCRIMINATOR AND IMAGE FORMING APPARATUS INCORPORATING THE SHEET DISCRIMINATOR - A sheet discriminator, which can be included in an image forming apparatus, includes a sheet loader on which a recording medium is loaded, an information detector including a light emitter to emit light to a surface of the recording medium loaded on the sheet loader and a light receiver to receive the light emitted by the light emitter and detecting information of the recording medium, a sheet distinguisher to distinguish a type of the recording medium based on the information detected by the information detector, and a detector body encasing at least the information detector therein and having an opening formed on an opposing face facing the sheet loader. The opposing face has an opening formed thereon. The opening has at least one arc-shaped side. | 03-31-2016 |
20160159597 | SHEET CONVEYER DEVICE - A sheet conveyer device, including a transmitter to transmit ultrasonic waves arranged on a conveyer path to face a first side of a sheet; a receiver to receive the ultrasonic waves arranged on the conveyer path to face a second side of the sheet; a measurement unit to measure an intensity of the received ultrasonic waves; and a determination unit to determine a condition of a range in the conveyer path between the transmitter and the receiver among a first condition, wherein no sheet is present in the range, a second condition, in which a sheet is present in the range, and a third condition, in which a plurality of sheets are present in the range, based on intensities of the ultrasonic waves measured by the measurement unit in a plurality of periods separately after transmission of the ultrasonic waves, is provided. | 06-09-2016 |