Abstract: An image forming apparatus includes a processor configured to display a clearing method for clearing an initial error among errors that have occurred, on a display part, while the clearing method of the initial error of which the clearing method is displayed on the display part is displayed, receive a temporary clearing instruction for processing the initial error as being temporarily cleared, each time the temporary clearing instruction is received, display clearing methods of subsequent errors on the display part in order in a switched manner, and in a case where clearing operations for all clearing methods of the errors that have occurred are completed, resume processing of a job paused by the errors.

Abstract: A sheet feeder includes: multiple sheet feeding trays each configured to house one or more print media sheets; and a processor configured to cause a sheet feeding tray assigned a top priority to feed a print media sheet after the sheet feeding tray is set up for sheet feeding and a state of the sheet feeding tray is fixed, the top priority being highest among priorities that are assigned to the multiple sheet feeding trays and that are determined in advance with regard to sheet feeding.

Abstract: A multiplate friction clutch can transmit power by pressing a stack of friction plates, which comprises plural separator plates and plural friction plates arranged alternately side by side, with a piston movable within a clutch casing. The multiplate friction clutch includes an annular holding groove formed in a pressing wall of the piston, a cushioning wave spring received in the holding groove, and an annular protuberance formed on an outer circumferential edge of an opening of the holding groove. The cushioning wave spring can be brought into resilient contact with one of the friction plates, which one friction plate is located adjacent to the piston. The annular protuberance prevents the wave spring from falling off the holding groove.

Abstract: A multiplate friction clutch can transmit power by pressing a stack of friction plates, which comprises plural separator plates and plural friction plates arranged alternately side by side, with a piston movable within a clutch casing. The multiplate friction clutch includes an annular holding groove formed in a pressing wall of the piston, a cushioning wave spring received in the holding groove, and an annular protuberance formed on an outer circumferential edge of an opening of the holding groove. The cushioning wave spring can be brought into resilient contact with one of the friction plates, which one friction plate is located adjacent to the piston. The annular protuberance prevents the wave spring from falling off the holding groove.

Abstract: A hydraulic pressure control valve for an oil chamber in a hydraulic multiplate clutch assembly is disclosed. The hydraulic pressure control valve is to be mounted on a pressing piston in the hydraulic multiplate clutch assembly. The hydraulic pressure control valve includes a valve plate composed of a leaf spring for controlling a leak hole formed through the pressing piston; and a single-piece weight staked on the valve plate such that valve-opening force for the leaf spring is increased under centrifugal force.

Abstract: The present invention provides a wet multi-plate clutch comprising a clutch case and hub disposed on a same axis, a first friction engagement element disposed in the clutch case, a second friction engagement element disposed on the hub, and a piston for applying an axial load to the first and second friction engagement elements, and wherein a recessed groove is formed in a surface of the piston opposing to the first and second friction engagement elements, and a wave spring is disposed within the recessed groove, and only a portion of the opposed surface at an outer diameter side or an inner diameter side of the recessed groove urges the respective friction engagement elements.

Abstract: The present invention provides a wet multi-plate clutch comprising a clutch case and hub disposed on a same axis, a first friction engagement element disposed in the clutch case, a second friction engagement element disposed on the hub, and a piston for applying an axial load to the first and second friction engagement elements, and wherein a recessed groove is formed in a surface of the piston opposing to the first and second friction engagement elements, and a wave spring is disposed within the recessed groove, and only a portion of the opposed surface at an outer diameter side or an inner diameter side of the recessed groove urges the respective friction engagement elements.

Abstract: In a V-pulley control mechanism for a variable-speed drive of belt type in which driving of a V-pulley of the variable-speed drive of belt type is controlled by a motor, the V-pulley control mechanism is disposed between the motor and the V-pulley and comprises a clutch tightening portion, a clutch mechanism which can be tightened by the clutch tightening portion, and a one-way clutch portion.

Abstract: A can lid for a can, including a top plate to which a tab having a tab nose is coupled by a rivet at the substantial center thereof, a tab nose recess formed in the top plate underneath the tab nose and having a smooth bottom surface with no step part, and a score formed in the top plate surrounding around the tab nose recess and having a start point and an end point located in front of the rivet and defining therebetween a hinge space.

Abstract: A multi-bent drag strip is provided for use in a one-way clutch having an outer and inner rings, a ring-shaped outer and inner retainers arranged between inner and outer circumferential surfaces of said outer and inner rings, and plural sprags held in place by said outer and inner retainers to permit selective transmission of a torque between said outer and inner rings. The drag strip has a strip portion to be disposed in contact at a part thereof with said outer circumferential surface of said inner ring and bent end portions located on opposite sides of said strip portion and to be disposed in contact with an inner circumferential surface of said inner retainer. Between an area of contact between said strip portion and said outer circumferential surface of said inner ring and each of said bent end portions, said strip portion has at least one bent portion to be disposed out of contact with said outer circumferential surface of said inner ring and said inner circumferential surface of said inner retainer.

Abstract: A production control system controls a plurality of producing points so that products are produced while supplying parts among the producing points. The production control system includes a first producing point which is used as a center producing point and includes a data base, second producing points respectively having a data base, and one or a plurality of communication networks coupling the data bases of the first producing point and the second producing points.