Abstract:
A sheet feeder includes a tray configured to load a sheet to be fed thereon. The tray has a tray upper face and a pair of cursors. The tray upper face has a recessed portion, a guide plate and a feeding route. The recessed portion extends along the width direction on an upstream side from the pair of cursors in the feeding direction. The guide plate is configured to cover an upper side of the recessed portion. The feeding route is formed between the recessed portion and the guide plate and extending from an inlet port positioned on an upstream side to an outlet port positioned on a downstream side along the feeding direction. The sheet in a state of being passed through the feeding route is aligned with the pair of cursors on the tray upper face and then fed.
Abstract:
A sheet process device includes a supporting member and a process device main body. The supporting member is attached to the lateral face at a side of an in-body sheet ejection space of an image forming apparatus. The process device main body is supported by the supporting member. The process device main body includes a relay conveyance unit and a post process unit. The relay conveyance unit is arranged slidable in a direction to the in-body sheet ejection space. The post process unit is arranged slidable in upward and downward directions with respect to the supporting member. The process device main body provides a sheet conveying path extending from a sheet ejection port of the image forming apparatus to the post process unit through the relay conveyance unit, when the post process unit is moved upwardly after the relay conveyance unit is moved into the in-body sheet ejection space.
Abstract:
A sheet feeding device includes a sheet feeding roller, a following roller, a rotational speed detection part, and a control part. The rotational speed detection part is configured to detect a rotational speed of the following roller. The control part is configured to accelerate a rotation of the sheet feeding roller and to adjust a sheet interval. The control part obtains a rotational rate of the following roller to the sheet feeding roller based on the rotational speed of the following roller, obtains an actual linear velocity of the sheet based on the rotational rate of the following roller and a theoretical linear velocity of the sheet after accelerating the rotation of the sheet feeding roller, and then adjusts the sheet interval based on the actual linear velocity of the sheet.
Abstract:
A fixing device includes a fixing member, a pressure member, and a separating unit. The pressure member is rotatably located and in a pressure contact with the fixing member to form a fixing nip. The separating unit is configured to separate a sheet from the fixing member. The sheet is attached on the fixing member when passing through the fixing nip. The separating unit includes a sliding member, a claw member, and a turning mechanism. The sliding member is located in a state of contacting a surface of the fixing member. The claw member runs toward the fixing nip from the sliding member. The claw member has a distal end portion. The claw member is located in a state where the distal end portion contacts the surface of the fixing member. The turning mechanism reciprocates the sliding member and the claw member along a rotation direction of the fixing member.
Abstract:
A sheet feed conveyance device includes a warning section, a pickup roller that feeds a sheet, a separation section, a speed sensor that detects a conveyance speed of the sheet, and a controller. The separation section includes a feed roller that feeds downstream the sheet fed by the pickup roller and a retard roller that returns a sheet involved in multiple sheet feeding toward the pickup roller. The controller recognizes the conveyance speed based on output of the speed sensor, integrate conveyance speeds detected in a measurement time period from rotation start of the pickup roller to elapse of a specific time period, and determines necessity for maintenance of the pickup roller according to a measurement distance as a result of integration.
Abstract:
A sheet guiding mechanism includes a pair of first rotators and a pair of second rotators provided in a conveying path for a sheet material, a first sheet guide portion, a second sheet guide portion, a shaft member, and a plurality of guide rollers. The first sheet guide portion and the second sheet guide portion form guide surfaces for the sheet material on both sides of the conveying path. Both end portions of the shaft member extending along a width direction are supported by the second sheet guide portion. The guide rollers are in contact with the sheet material conveyed in the conveying path, and rotate to follow the sheet material. The shaft member is bent by a pressure applied from the sheet material to the guide rollers when a tension is applied to the sheet material between the pair of first rotators and the pair of second rotators.
Abstract:
A sheet guiding mechanism includes a pair of first rotators and a pair of second rotators provided in a conveying path for a sheet material, a first sheet guide portion, a second sheet guide portion, a shaft member, and a plurality of guide rollers. The first sheet guide portion and the second sheet guide portion form guide surfaces for the sheet material on both sides of the conveying path. Both end portions of the shaft member extending along a width direction are supported by the second sheet guide portion. The guide rollers are in contact with the sheet material conveyed in the conveying path, and rotate to follow the sheet material. The shaft member is bent by a pressure applied from the sheet material to the guide rollers when a tension is applied to the sheet material between the pair of first rotators and the pair of second rotators.
Abstract:
According to the present disclosure, a recording medium feeding device includes a pickup roller, a feed roller, a retard roller, a holding member, a pressing mechanism, a pressing force changing mechanism, and a driving force transmitting mechanism. The holding member is configured to rotatably support the feed roller and the pickup roller. The pressing mechanism is configured to press the pickup roller against a recording medium. The pressing force changing mechanism is configured to change the pressing force of the pickup roller. The driving force transmitting mechanism is configured to transmit a rotation-driving force to the feed roller. The pressing force changing mechanism obtains a driving force from the driving force transmitting mechanism, and increases the pressing force according to rotation time of the pickup roller.