A conveyance device includes a sheet stacker, a pickup roller, a feed roller, a first drive source, a first encoder, a first drive controller, a separation roller, a second drive source, a second encoder, a second drive controller, a separation pressure provider, and a torque estimation device. The torque estimation device estimates a torque of the second drive source with an applied voltage to the second drive source from the second drive controller after calculating a turning angle speed from a rotation amount of the second drive source detected by the second encoder based on a relational expression between a motor rotation speed and an applied voltage that are measured beforehand for the second drive source and a torque of the second drive source.

A conveyance device includes a sheet stacker, a pickup roller, a feed roller, a first drive source, a first encoder, a first drive controller, a separation roller, a second drive source, a second encoder, a second drive controller, a separation pressure provider, and a torque estimation device. The torque estimation device estimates a torque of the second drive source with an applied voltage to the second drive source from the second drive controller after calculating a turning angle speed from a rotation amount of the second drive source detected by the second encoder based on a relational expression between a motor rotation speed and an applied voltage that are measured beforehand for the second drive source and a torque of the second drive source.

This application discloses a device and a method for separating optical adhered films. The device for separating optical adhered films includes: a separating workbench configured to separate optical films; a suction nozzle configured to adsorb the optical film; a driving device configured to drive the suction nozzle and the separating workbench. The suction nozzle includes a first group of suction nozzles and a second group of suction nozzles. The first group of suction nozzles and the second group of suction nozzles are arranged opposite to each other. The method for separating optical adhered films includes the following steps: separating, when the detection structure for two optical adhered films detect that at least two optical films are adhered to each other, the optical adhered films by using a first group of suction nozzles and a second group of suction nozzles.

An ultrasonic device has a substrate in which ultrasonic elements transmitting an ultrasonic wave in a first direction are arrayed. A reverberation reduction film which reduces reverberant vibration of the substrate is arranged on a side of the first direction in the ultrasonic element. In the reverberation reduction film, a groove is arranged between the ultrasonic elements next to each other.

A multi-feed detection device includes a transmission circuit substrate to which an ultrasonic transmitter transmitting an ultrasonic wave is installed, and an ultrasonic receiver receiving the ultrasonic wave. The ultrasonic transmitter has arrayed ultrasonic transmission elements and transmits ultrasonic waves with different phases from the ultrasonic transmission elements to transmit the ultrasonic waves in a direction diagonally intersecting a thickness direction of the transmission circuit substrate.

An auto-adjusting separation mechanism, comprising: a bracket with at least one side arm, a sensor module arranged on the side arm, a rotary shaft arranged at the front end of the bracket; a separation roller set pivotally arranged on the rotary shaft, a sensor wheel arranged to couple with the sensor module, and a torque limiter arranged at the front end of the bracket; wherein, by monitoring the rotation of the sensor wheel with the sensor module, the separating force of the separation roller set is adjustable via a microcontrollers which is capable to adjust the transmission gear set.

A sheet feeding device includes a conveyance rotator, a separation rotator, a torque applier, a torque control circuit, and a torque transmission switcher. The conveyance rotator conveys a sheet in a sheet feeding direction. The separation rotator sandwiches the sheet together with the conveyance rotator. The torque applier applies a reverse torque to the separation rotator in a sheet reversing direction to reverse the sheet. The torque control circuit controls the reverse torque applied to the separation rotator to be equal to or less than a given value. The torque transmission switcher switches, between a transmission state and a non-transmission state, a state of a torque transmission path between the torque applier and the separation rotator. The transmission state is a state in which the reverse torque is transmitted. The non-transmission state is a state in which the reverse torque is not transmitted.

In order to miniaturize an image forming system, the present invention provides an image forming system which is provided with a sheet feed apparatus including a transport roller pair capable of transporting a sheet in a sheet transport direction S, and an image forming apparatus including an image forming section capable of forming an image on the sheet acquired from the sheet feed apparatus, including a switch member disposed on the downstream side of the transport roller pair in the sheet transport direction to be switched between a first position for guiding the sheet transported by the transport roller pair to the image forming apparatus, and a second position for guiding the sheet transported by the transport roller pair downward, and a storage tray disposed below the switch member predetermined space apart to be able to store the sheet guided to below the switch member positioned in the second position.

In order to miniaturize an image forming system, the present invention provides an image forming system which is provided with a sheet feed apparatus including a transport roller pair capable of transporting a sheet in a sheet transport direction S, and an image forming apparatus including an image forming section capable of forming an image on the sheet acquired from the sheet feed apparatus, including a switch member disposed on the downstream side of the transport roller pair in the sheet transport direction to be switched between a first position for guiding the sheet transported by the transport roller pair to the image forming apparatus, and a second position for guiding the sheet transported by the transport roller pair downward, and a storage tray disposed below the switch member predetermined space apart to be able to store the sheet guided to below the switch member positioned in the second position.

A media feeding apparatus includes a media mounting section, a first feed roller, a media pressing section for pressing media sheets against the first feed roller, and a pressing force adjuster for adjusting the pressing force of the media pressing section. The controller sets the pressing force of the media pressing section to first pressing force and drives the first feed roller and the second feed roller in a forward rotation direction, and in a case in which the first detector detects a passage of a leading edge of the media sheet and the second detector detects no passage of the leading edge of the media sheet after predetermined first set time has passed, the controller continues the rotation of the first feed roller and the second feed roller with second pressing force of the media pressing section greater than or equal to the first pressing force.