Retainer rings for locking in an N-sided shaft to restrict axial movement of components sandwiched between them. The retainer rings have inner edges bounding a central bore. The inner edges are defined by a series of N arcs whose distance from the bore's center decreases gradually along the inner edge from a first end to a second end of each arc. The rings are slid on to the shaft with the corners of the shaft aligned with the first ends of the arcs. Then the rings are rotated on the shafts toward the second ends of the arcs until the corners of the shafts jam against the inner edges. A special spanner wrench can be used to tighten and loosen the rings on the shaft.

A material processing apparatus has a discharge conveyor that is coupled to the body of the apparatus so that it can pivot with respect to the body and be raised vertically with respect to the body. The coupling mechanism allows the pivoting and lifting of the conveyor to be performed by the same actuators. The discharge conveyor can be raised into an access state in which a transfer conveyor can be removed from the body.

A material processing apparatus has a discharge conveyor that is coupled to the body of the apparatus so that it can pivot with respect to the body and be raised vertically with respect to the body. The coupling mechanism allows the pivoting and lifting of the conveyor to be performed by the same actuators. The discharge conveyor can be raised into an access state in which a transfer conveyor can be removed from the body.

A bag bundle conveyance apparatus which conveys a bag bundle including a plurality of bags, includes: a support body which supports the bag bundle from below; a holding unit which holds the bag bundle; and a transfer drive unit which moves the holding unit in a conveyance direction, wherein the transfer drive unit moves the holding unit in the conveyance direction in a state where the bag bundle is supported from below by the support body and is held by the holding unit, in such a manner that the bag bundle is conveyed in the conveyance direction.

A bag bundle conveyance apparatus which conveys a bag bundle including a plurality of bags, includes: a support body which supports the bag bundle from below; a holding unit which holds the bag bundle; and a transfer drive unit which moves the holding unit in a conveyance direction, wherein the transfer drive unit moves the holding unit in the conveyance direction in a state where the bag bundle is supported from below by the support body and is held by the holding unit, in such a manner that the bag bundle is conveyed in the conveyance direction.

A piezoelectric driving device includes a substrate, a first insulating film disposed on the substrate, a piezoelectric element for driving disposed on the first insulating film and configured to vibrate the substrate, a piezoelectric element for detection configured to detect the vibration of the substrate, a wire for driving electrically connected to the piezoelectric element for driving, a wire for detection electrically connected to the piezoelectric element for detection, and a lower layer wire disposed between the first insulating film and the substrate and set to fixed potential. At least one of the wire for driving and the wire for detection overlaps at least a part of the lower layer wire.

A piezoelectric driving device includes a substrate, a first insulating film disposed on the substrate, a piezoelectric element for driving disposed on the first insulating film and configured to vibrate the substrate, a piezoelectric element for detection configured to detect the vibration of the substrate, a wire for driving electrically connected to the piezoelectric element for driving, a wire for detection electrically connected to the piezoelectric element for detection, and a lower layer wire disposed between the first insulating film and the substrate and set to fixed potential. At least one of the wire for driving and the wire for detection overlaps at least a part of the lower layer wire.

Disclosed is a chain disk corner. In certain embodiments, the chain disk corner includes a bi-directional orientation independent chain disk corner wheel. In particular, the wheel is molded and devoid of moving parts. In certain embodiments, the chain disk corner includes a window portion. In particular, a bottom housing subassembly includes a bottom body of an opaque material and a hingedly attached window portion. In certain embodiments, the chain disk corner includes a reinforcing washer. In particular, a top washer is attached by injection molding to an interior of the top body, and/or a bottom washer is attached by injection molding to an interior of the bottom body. In certain embodiments, the chain disk corner includes a top surface devoid of pockets. In particular, a top body includes a plurality of ribs positioned at an interior surface of the top body.

A tray sealer comprises a conveyor arrangement for conveying packaging trays along a conveying direction. The conveyor arrangement comprises a first conveyor device for conveying a first line of packaging trays along the conveying direction, a second conveyor device running laterally alongside the first conveyor device for conveying a second line of packaging trays along the conveying direction, and a center guide which is arranged between the first conveyor device and the second conveyor device and extends along the conveying direction. The conveyor arrangement further comprises a third conveyor device for conveying packaging trays along the conveying direction. The third conveyor device extends adjoining the second conveyor device in terms of the conveying direction laterally alongside the first conveyor device.

A tray sealer comprises a conveyor arrangement for conveying packaging trays along a conveying direction. The conveyor arrangement comprises a first conveyor device for conveying a first line of packaging trays along the conveying direction, a second conveyor device running laterally alongside the first conveyor device for conveying a second line of packaging trays along the conveying direction, and a center guide which is arranged between the first conveyor device and the second conveyor device and extends along the conveying direction. The conveyor arrangement further comprises a third conveyor device for conveying packaging trays along the conveying direction. The third conveyor device extends adjoining the second conveyor device in terms of the conveying direction laterally alongside the first conveyor device.