公开(公告)号：US12084305B2

公开(公告)日：2024-09-10

申请号：US17649599

申请日：2022-02-01

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12

CPC分类号： B65H7/125 ,  B65H2511/524 ,  B65H2553/30 ,  B65H2801/03

摘要： A medium conveying apparatus includes a conveying roller to convey a medium, an end detection sensor for detecting a position of an end of the medium conveyed by the conveying roller, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller in a detection area, and a processor to determine whether an overlap detection is valid or invalid based on a positional relationship between the position of the end of the medium detected by the end detection sensor and the detection area, and execute an abnormality processing for multi-feed based on a detection result by the overlap detection sensor when it is determined that the overlap detection is valid.

公开(公告)号：US20240228209A9

公开(公告)日：2024-07-11

申请号：US18467561

申请日：2023-09-14

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12 ,  B65H5/06

CPC分类号： B65H7/125 ,  B65H5/062

摘要： A medium conveyance apparatus includes a drive signal output circuit to output a drive signal at a predetermined timing, a first sound wave emitter to output a sound wave based on the drive signal outputted at the predetermined timing, a first sound wave receiver to output a first sound wave signal corresponding to the received sound wave, a second sound wave emitter to output a sound wave based on the drive signal outputted at the predetermined timing, a second sound wave receiver to output a second sound wave signal corresponding to the received sound wave, a processor to determine a state of the medium based on the first sound wave signal and the second sound wave signal, and an output circuit to output the first sound wave signal and the second sound wave signal to the processor at timings different from each other.

公开(公告)号：US11807489B2

公开(公告)日：2023-11-07

申请号：US17578101

申请日：2022-01-18

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12 ,  B65H7/18

CPC分类号： B65H7/125 ,  B65H7/18 ,  B65H2511/416 ,  B65H2511/524 ,  B65H2553/30 ,  B65H2557/63

摘要： A medium conveying apparatus includes a conveying roller to convey a medium, and a processor to detect transmission information of an ultrasonic wave transmitted through the medium or thickness information of the medium at a plurality of positions in the conveyed medium, calculate a size of an area in which the transmission information or the thickness information is within a predetermined range in the conveyed medium, determine whether a multi-feed of the medium has occurred, by comparing a value based on the transmission information or the thickness information with a threshold, and execute an abnormality processing when it is determined that the multi-feed of the medium has occurred. The processor changes the threshold according to the size.

公开(公告)号：US20220274794A1

公开(公告)日：2022-09-01

申请号：US17649599

申请日：2022-02-01

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12

摘要： A medium conveying apparatus includes a conveying roller to convey a medium, an end detection sensor for detecting a position of an end of the medium conveyed by the conveying roller, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller in a detection area, and a processor to determine whether an overlap detection is valid or invalid based on a positional relationship between the position of the end of the medium detected by the end detection sensor and the detection area, and execute an abnormality processing for multi-feed based on a detection result by the overlap detection sensor when it is determined that the overlap detection is valid.

公开(公告)号：US12077406B2

公开(公告)日：2024-09-03

申请号：US17649607

申请日：2022-02-01

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12

CPC分类号： B65H7/125 ,  B65H2511/12 ,  B65H2511/524 ,  B65H2553/30 ,  B65H2801/03

摘要： A medium conveying apparatus includes a conveying roller to convey a medium, a width detection sensor for detecting a width of the medium conveyed by the conveying roller in a direction perpendicular to a conveying direction, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller, and a processor to determine whether to execute an abnormality processing for a multi-feed, based on the width of the medium acquired based on a detection result by the width detection sensor and a detection result by the overlap detection sensor. The processor acquires an overlap detection width being a width in which the medium is estimated to overlap in the direction perpendicular to the conveying direction, based on the detection result by the overlap detection sensor. The processor executes the abnormality processing when the width of the medium and the overlap detection width are equal.

公开(公告)号：US20230020031A1

公开(公告)日：2023-01-19

申请号：US17806639

申请日：2022-06-13

申请人： PFU LIMITED

发明人： Shumpei Koshima ,  Masaaki Sakai

IPC分类号： H05B45/345

摘要： A light emitting element driving device includes a light emitting element to emit light in response to a supply of a first current, a first switching element to turn ON/OFF the first current supplied to the light emitting element, a second switching element to turn ON/OFF a second current not supplied to the light emitting element, a constant current circuit to adjust a total current amount of the first current and the second current to be constant, and a control circuit. The control circuit turns ON the first switching element in a state of flowing the second current to the second switching element by turning ON the second switching element, and after turning ON the first switching element, flows the first current to the light emitting element and the first switching element by turning OFF the second switching element.

公开(公告)号：US20220258997A1

公开(公告)日：2022-08-18

申请号：US17578117

申请日：2022-01-18

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/12 ,  B65H7/18

摘要： A medium conveying apparatus includes a conveying roller to convey a rectangular medium, and a processor to generate an input image acquired by imaging the conveyed medium, detect an overlap of the conveyed medium, detect an object area from the input image, determine whether an outer shape of the object area is rectangular, determine whether a multi-feed of the medium has occurred based on whether the overlap of the medium has been detected and whether the outer shape of the object area is rectangular, and execute an abnormality processing when it is determined that the multi-feed of the medium has occurred.

公开(公告)号：US11856170B2

公开(公告)日：2023-12-26

申请号：US18040139

申请日：2020-10-12

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： H04N1/04 ,  G06T7/13

CPC分类号： H04N1/04 ,  G06T7/13

摘要： Provided are a medium conveyance apparatus, control method, and control program is to enable more precisely detecting an end part in a main scan direction of a medium from an image. A medium conveyance apparatus includes a conveying module to convey a medium, an imaging device to capture an image of the conveyed medium, a storage device to store a low reliability region inside an input image of a medium captured by the imaging device based on a positional relationship between an imaging position of the imaging device and arrangement position of the conveying module, an edge pixel detection module to detect edge pixels from the input image, an end part detection module to detect an end part in a main scan direction of the medium based on edge pixels detected from a region not including the low reliability region inside the input image, and an output control module to output information relating to the detected end part.

公开(公告)号：US11363153B2

公开(公告)日：2022-06-14

申请号：US16985055

申请日：2020-08-04

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： H04N1/04 ,  H04N1/00

摘要： A medium conveying apparatus includes a conveying roller to convey a medium, an imaging device to generate an input image acquired by imaging the conveyed medium, and a processor to extract edge pixels from the input image, detect a degree of roundness at a corner of the medium in the input image based on the edge pixels, determine whether the conveyed medium is an ID card based on the degree of roundness, and control the conveying roller based on a result of the determination or outputs the result of the determination.

公开(公告)号：US10196222B2

公开(公告)日：2019-02-05

申请号：US15174893

申请日：2016-06-06

申请人： PFU LIMITED

发明人： Masaaki Sakai

IPC分类号： B65H7/14 ,  G01D5/347 ,  B65H5/06 ,  H03K5/08 ,  H03K5/1252

摘要： A document conveying apparatus includes a light source, a disk including a plurality of slits spaced apart with a predetermined interval in a rotation direction of the disk, which rotates in the rotation direction with a rotation speed as a document is conveyed, a light reception element provided at a position facing the light source with the disk interposed therebetween, a first signal generator for generating a first signal in accordance with light received by the light reception element, a second signal generator for generating a second signal obtained by removing, from the first signal, a noise component according to the rotation speed of the disk, and a controller for determining whether a document is conveyed by comparing the second signal with a predetermined threshold value.