An ultrasonic device includes an ultrasonic element that performs at least one of transmitting an ultrasonic wave along a first axis and receiving the ultrasonic wave input along the first axis, and a protective member that is provided on the first axis and covers the ultrasonic element, in which the protective member has a plurality of pores through which the ultrasonic wave traveling along the first axis passes.

A sensor (10) is used for detecting at least one edge of at least one product web (1) running in a run direction (2). The sensor (10) has active elements (11), which are arranged adjacent to one another and are formed by transmitters (12) and receivers (13). In this case, the transmitters (12) can emit waves (14) which are received by the receivers (13). The product web (1) is provided for influencing the waves (14) in the radiation path between the transmitters (12) and receivers (13). In this case, a first (21, 31) and second (22, 32) of the active elements (11) are adjacent and have a mutual first spacing (41). The second (22, 32) and a third (23, 33) of the active elements (11) are also adjacent to one another and have a second spacing (42), which corresponds to at least 1.2 times the first spacing (41).

A sheet pressing device includes a carry-in port that receives a Z-folded sheet having two folds; an additional folding roller disposed downstream of the carry-in port to press the fold; a lower folding guide having a pedestal disposed opposite to the additional folding roller; a first moving mechanism that moves the additional folding roller between a pressing position at which the additional folding roller is made to approach the pedestal and a retreat position at which the additional folding roller is moved relative to the pedestal from the pressing position; a second moving mechanism that moves the additional folding roller along the fold; and a control part. The control part controls the second moving mechanism so as to increase the number of times the additional folding roller is moved along the fold when a sheet section is positioned between the additional folding roller and the fold.

A paper conveyance device includes a paper feed unit, a conveyance rotator, a conveyance guide, a multi-feed detection unit, and a control unit. The control unit causes an ultrasonic sensor to transmit an ultrasonic wave in a detection section. The control unit sets a detection execution section and a detection skip section in the detection section. The control unit does not determine whether multi-feed has occurred in the detection skip section. The control unit sets the detection skip section based on a time point at which vibration is applied to conveyed paper.

A medium conveying apparatus includes a floating sensor located on an upstream side of a first roller in the medium conveying direction to detect a floating of the medium placed on a medium tray, a skew sensor located on a downstream side of a second roller in the medium conveying direction to detect a skew of the medium conveyed by the second roller, and a processor to determine whether the floating of the medium has occurred based on an output signal from the floating sensor, determine whether the skew of the medium has occurred based on an output signal from the skew sensor, and determine that a conveyance abnormality of the medium has occurred when the processor determines that the floating of the medium has occurred and the processor determines that the skew of the medium has occurred.

A method and apparatus for processing documents are provided. The apparatus includes a feeder for receiving a packet of a plurality of documents and separating the documents to serially feed the documents to a scanner. A drop feeder conveys the document packets to the feeder. A sensor provides information related to the thickness of the document packets and the drop feeder is controlled in response to the information related to the thickness of a packet in the feeder. The method includes the control of the drop feeder in response to information related to the thickness of a document packet at the feeder.

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 apparatus having a first aligner rigidly connected to a first sensor component. The apparatus having a second aligner rigidly connected to a second sensor component. The apparatus having a gap positioned to receive media, wherein the first aligner is configured to attract the second aligner across the gap to align the first sensor component with the second sensor component.

A sheet conveyance apparatus includes a first guide, a second guide configured to form a conveyance path together with the first guide, a conveyance portion, a pressing portion configured to press the sheet against the first guide, an urging portion configured to urge the pressing portion in an urging direction toward the first guide, a receiving member configured to hold the pressing portion and receive a reaction force of the urging portion, and a detection unit including a first detection, and a second detection portion, wherein the second guide provided with the second detection portion, and the receiving member are movably disposed with respect to the first guide provided with the first detection portion respectively, and are configured to be positioned with respect to the first guide independently from each other.