A system and method of detecting the presence of metallic objects in media to be conveyed in a medium transport system is disclosed. One or more metal detectors are included in the medium transport system to detect the presence of metal in the medium being transported. Signals from the metal detectors are sent to a system processor, which analyzes the signals, and produces proximity, duration, and/or intensity values therefrom. One or more microphones may also be included which detect the sound created as the medium is being transported. The processor computes sound values from the microphone signals, and analyzes the computed sound values along with the proximity, duration, and/or intensity values in order determine if the conveyance of the medium along the transport path should be stopped due to the presence of metal in the media or a jam occurring within the medium transport path.

The present invention relates to a force measuring device (10) for measuring the web tensions of a plurality of spaced apart longitudinal strips (5) of a longitudinally cut running material web that comprises a longitudinal direction defined by the running direction of the material web and a transverse direction, the force measuring device comprising an axle (12) and, supported on the axle, a measuring roll (20) wrapped around by the material web. Here, it is provided that the measuring roll is formed as a segmented measuring roll (20) having a plurality of measuring segments (22), the measuring segments (22) are arranged on the axle (12) in a respective measuring position, such that the spaced apart longitudinal strips (5) of the running material web wrap around in each case one or more measuring segments (22) and each measuring segment (22) is wrapped around by at most one longitudinal strip (5), each measuring segment (22) includes a dedicated load cell (26) for determining a web tension fraction of the longitudinal strip (5) wrapped around the measuring segment, the load cell providing a mount with which the measuring segment (22) sits on the axle (12), the force measuring device further comprising an evaluation unit (18) to which the measuring segments (22) are connected via electrical conductors and to which the measuring signals supplied by the load cells (26) in the measuring segments (22) are conductible, and the evaluation unit (18) comprising a web tension aggregation means (19) that is arranged and adapted to determine, for each longitudinal strip (5), from the web tension fractions that are determined by the load cells (26) of the measuring segments (22) wrapped around by said longitudinal strip (5), the total web tension of the longitudinal strip (5).

The sheet discharge device includes: a sheet discharge part; a sheet discharge tray having a tray upper surface and a rear wall portion; a fullness detection sensor for detecting that a height of a stack surface of folded sheets; and a first sheet presser member and a second sheet presser member for pressing a rear end side and a fore end side in a discharge direction, of the folded sheet. In a first pressing position in which the first sheet presser member extends from above the detection sensor to below the detection region, and is brought into contact with the folded sheet of a minimum size stacked on the tray upper surface. When a stack number of the folded sheets has exceeded a specified number, the first sheet presser member is retracted upward from the first pressing position by the rise of the stack surface.

An image forming apparatus includes an apparatus main body, a sheet storage cassette, a sheet feed unit, a first detection sensor having a first detector for detecting the presence/absence of sheets stacked on a sheet stacking plate, a second detection sensor having a second detector for detecting the position of the top face of the sheets stacked on the sheet stacking plate, a cassette detection sensor, a driving device, and a controller. The sheet feed unit includes a first actuator for switching detection states of the first detection sensor and a second actuator for switching detection states of the second detection sensor. The controller determines the mounting state of the sheet feed unit based on the detection state of the first and second detection sensors.

An apparatus for steering a web, including a web path having at least one steering roller and an exit roller, each having a mount; wherein the steering roller(s) each have an axis of rotation and wherein the mounts for the steering roller(s) can pivot those axes with a total of two degrees of freedom. An array comprising a plurality of sensors for monitoring the position of the web is present connected to a controller so as to determine the position and angular orientation of the web. The controller adjusts the pivot(s) of the mount(s) so as to control the angular orientation and the lateral position of the web at a particular point along the web path.

A double feed detection sensor unit includes a double feed detection sensor for detecting a document via a hole on a conveyance guide, a control circuit board on which the double feed detection sensor and an element are provided, and a protection member provided to cover the element.

An image forming apparatus includes an apparatus main body, a sheet storage cassette, a sheet feed unit, a first detection sensor having a first detector for detecting the presence/absence of sheets stacked on a sheet stacking plate, a second detection sensor having a second detector for detecting the position of the top face of the sheets stacked on the sheet stacking plate, a cassette detection sensor, a driving device, and a controller. The sheet feed unit includes a first actuator for switching detection states of the first detection sensor and a second actuator for switching detection states of the second detection sensor. The controller determines the mounting state of the sheet feed unit based on the detection state of the first and second detection sensors.

A recording medium conveyance device includes a recording medium conveyance unit, a detecting member, a voltage application unit, and a control unit. The recording medium conveyance unit conveys a recording medium. The detecting member is disposed to face the recording medium conveyance unit with a predetermined interval therebetween. The voltage application unit applies a detection voltage between the recording medium conveyance unit and the detecting member. The control unit controls the recording medium conveyance unit and the voltage application unit. When the recording medium conveyance unit conveys the recording medium, the control unit controls the voltage application unit to apply the detection voltage, detects contact between the recording medium and the detecting member, on the basis of a change in the detection voltage with respect to a predetermined threshold value, and determines conveyance abnormality of the recording medium.

A tape attachment apparatus includes a tape supply unit configured to provide a tape to be attached to a tip of an electrode roll, a tape attachment unit configured to attach the tape provided by the tape supply unit to the electrode roll, and a frame configured to allow the tape attachment unit to be mounted to the frame. A tape attachment process to prevent unwinding of the electrode roll is automatically performed.

A sheet feeding apparatus includes a stacking portion, a lifting portion, a feeding portion, and a control portion. The sheet feeding apparatus further includes a first height detecting portion configured to output a signal corresponding to a position in a height direction of the topmost sheet of sheets stacked on the stacking portion, a sheet presence detecting portion configured to output a signal corresponding to presence or absence of the sheets stacked on the stacking portion, and a second height detecting portion configured to output a signal corresponding to a position in a height direction of the stacking portion. The control portion performs control for sheet feeding operation using the signal from the sheet presence detecting portion if the position of the stacking portion is above a predetermined height based on the signal from the second height detecting portion and, if the position of the stacking portion is below the predetermined height, the control portion performs control for sheet feeding operation not using the sheet presence detecting portion.