A sheet loading device includes a discharge roller pair, a loading tray, a paddle member, a sheet holding member, a tray lifting-lowering drive portion, a top surface detection sensor, and a control portion. The control portion is capable of performing a lifting-lowering operation to arrange the loading tray at a reference position by lowering the loading tray with the sheet holding member arranged at the holding position to turn the top surface detection sensor into an off state, then lifting the loading tray to turn the top surface detection sensor into an on state, and then lowering the loading tray again to turn the top surface detection sensor into the off state and stopping the loading tray. With the loading tray at the reference position, a predetermined clearance is provided between a top surface of a sheet loaded on the loading tray and a rotational orbit of the paddle member.

A sheet loading device includes a discharge roller pair, a loading tray, a paddle member, a sheet holding member, a tray lifting-lowering drive portion, a top surface detection sensor, and a control portion. The control portion is capable of performing a lifting-lowering operation to arrange the loading tray at a reference position by lowering the loading tray with the sheet holding member arranged at the holding position to turn the top surface detection sensor into an off state, then lifting the loading tray to turn the top surface detection sensor into an on state, and then lowering the loading tray again to turn the top surface detection sensor into the off state and stopping the loading tray. With the loading tray at the reference position, a predetermined clearance is provided between a top surface of a sheet loaded on the loading tray and a rotational orbit of the paddle member.

An image forming apparatus includes a storage unit storing sheets each including a wireless tag, a printer, a communication device, and a controller for controlling the printer to convey a first sheet, acquiring first strengths of signals from a first tag on a first sheet during the conveyance of the first sheet and second strengths from tags not sheets being conveyed. Based on the acquired strengths, the controller determines a threshold value for distinguishing between sheets being conveyed and not being conveyed. The controller then controls the communication device to write information to a tag on a sheet being conveyed based on the threshold value.

An image forming apparatus includes a storage unit storing sheets each including a wireless tag, a printer, a communication device, and a controller for controlling the printer to convey a first sheet, acquiring first strengths of signals from a first tag on a first sheet during the conveyance of the first sheet and second strengths from tags not sheets being conveyed. Based on the acquired strengths, the controller determines a threshold value for distinguishing between sheets being conveyed and not being conveyed. The controller then controls the communication device to write information to a tag on a sheet being conveyed based on the threshold value.

An image forming apparatus includes a storage unit storing sheets each including a wireless tag, a printer, a communication device, and a controller for controlling the printer to convey a first sheet, acquiring first strengths of signals from a first tag on a first sheet during the conveyance of the first sheet and second strengths from tags not sheets being conveyed. Based on the acquired strengths, the controller determines a threshold value for distinguishing between sheets being conveyed and not being conveyed. The controller then controls the communication device to write information to a tag on a sheet being conveyed based on the threshold value.

An image forming apparatus includes a storage unit storing sheets each including a wireless tag, a printer, a communication device, and a controller for controlling the printer to convey a first sheet, acquiring first strengths of signals from a first tag on a first sheet during the conveyance of the first sheet and second strengths from tags not sheets being conveyed. Based on the acquired strengths, the controller determines a threshold value for distinguishing between sheets being conveyed and not being conveyed. The controller then controls the communication device to write information to a tag on a sheet being conveyed based on the threshold value.

A sheet loading device includes a discharge roller pair, a loading tray, a paddle member, a sheet holding member, a tray lifting-lowering drive portion, a top surface detection sensor, and a control portion. The control portion is capable of performing a lifting-lowering operation to arrange the loading tray at a reference position by lowering the loading tray with the sheet holding member arranged at the holding position to turn the top surface detection sensor into an off state, then lifting the loading tray to turn the top surface detection sensor into an on state, and then lowering the loading tray again to turn the top surface detection sensor into the off state and stopping the loading tray. With the loading tray at the reference position, a predetermined clearance is provided between a top surface of a sheet loaded on the loading tray and a rotational orbit of the paddle member.

A sheet loading device includes a discharge roller pair, a loading tray, a paddle member, a sheet holding member, a tray lifting-lowering drive portion, a top surface detection sensor, and a control portion. The control portion is capable of performing a lifting-lowering operation to arrange the loading tray at a reference position by lowering the loading tray with the sheet holding member arranged at the holding position to turn the top surface detection sensor into an off state, then lifting the loading tray to turn the top surface detection sensor into an on state, and then lowering the loading tray again to turn the top surface detection sensor into the off state and stopping the loading tray. With the loading tray at the reference position, a predetermined clearance is provided between a top surface of a sheet loaded on the loading tray and a rotational orbit of the paddle member.

A delivery device for a sheet-processing machine, comprises at least one deposition station and a conveyer station, by the use of which, upstream-processed sheets of printed material can be picked up in a transfer location, and can be conveyed through the deposition station via a first conveying system, where they can be deposited optionally to form a stack, or can be conveyed beyond that stack. A holding device, which holds down the uppermost sheet of the stack during the transfer of a sheet to be conveyed against an entrainment or a lifting, is provided with one or with a plurality of holding assemblies which are spaced apart from each other transversely to the transport direction. A sheet-guiding element may be provided, which adjoins the deposition station and which is variable in its vertical position with at least its upstream end by the use of an actuating drive.

A delivery device for a sheet-processing machine, comprises at least one deposition station and a conveyer station, by the use of which, upstream-processed sheets of printed material can be picked up in a transfer location, and can be conveyed through the deposition station via a first conveying system, where they can be deposited optionally to form a stack, or can be conveyed beyond that stack. A holding device, which holds down the uppermost sheet of the stack during the transfer of a sheet to be conveyed against an entrainment or a lifting, is provided with one or with a plurality of holding assemblies which are spaced apart from each other transversely to the transport direction. A sheet-guiding element may be provided, which adjoins the deposition station and which is variable in its vertical position with at least its upstream end by the use of an actuating drive.